CN103916676B - A kind of boundary intensity determines method, block-eliminating effect filtering method and device - Google Patents

Abstract

The embodiment of the present invention discloses a boundary strength determination method, a deblocking filter method, and a device, wherein the method includes: determining a possible filtering boundary of a DBF; acquiring the encoding mode of adjacent image blocks on both sides of the possible filtering boundary; and Encoding information; when the encoding modes of the adjacent image blocks are not Intra mode, and the encoding modes of the adjacent image blocks include at least one BaseLayer mode, the possible filtering boundaries are set according to the encoding information The boundary strength BS is set to a different boundary strength value. When the encoding modes of adjacent image blocks are not Intra mode, and the encoding modes of adjacent image blocks include at least one BaseLayer mode, the BS of the possible filtering boundary is set to different boundary strength values, and the setting of BS is different. Then all are set to the same strength to make the setting of BS more reasonable, thereby improving the coding efficiency.

Description

Method for determining boundary strength, deblocking filter method, and device

technical field

The invention relates to the field of communication technology, in particular to a boundary strength determination method, a deblocking filtering method, and a device.

Background technique

With the rapid development of the Internet and the increasingly rich material and spiritual culture of people, there are more and more requirements for video applications on the Internet, especially for high-definition video applications, and the data volume of high-definition videos is very large. For transmission in the Internet with limited bandwidth, the problem that must be solved first is the problem of high-definition video compression and encoding. At present, there are two international organizations dedicated to the formulation of video coding standards, namely: MPEG (Motion Picture Experts Group, motion picture Expert Group) and VCEG (Video Coding Experts Group, Video Coding Experts Group) of ITU-T (International Telecommunication Union-Telecommunication standardization sector, International Telecommunication Union Telecommunication Standardization Group).

Founded in 1986, MPEG is responsible for formulating relevant standards in the multimedia field, which are mainly used in storage, broadcasting, streaming media on the Internet or wireless networks, etc. ITU-T mainly formulates video coding standards for real-time video communication, such as video telephony, video conferencing and other applications. In the past few decades, video coding standards for various applications have been successfully formulated internationally, mainly including: MPEG-1 standard for VCD (Video Compact Disc, audio and video disc), and MPEG-1 standard for DVD (Digital Versatic Disc , Digital Versatile Disc) and DVB (Digital Video Broadcasting, Digital Video Broadcasting) MPEG-2 standards, H.261 and H.263 standards for video conferencing, MPEG-4 standards that allow encoding of objects of arbitrary shape, The H.264/AVC (Advanced Video Coding, Advanced Video Coding) standard recently developed internationally, and the HEVC (High Efficiency Video Coding, High Efficiency Video Coding) standard being developed.

In the network environment (such as the Internet), because the network bandwidth is limited, the needs of terminal equipment and users are different, so it is not satisfactory and effective to compress the code stream for a specific application. For some specific users or devices, it may not even make sense. An effective way to solve this problem is SVC (Scalable Video Coding, scalable video coding), JVT (Joint Video Team, joint video coding group) has incorporated SVC into the extension of the H.264/AVC standard, and now It is officially accepted as an international standard, and specifies the decoding syntax structure of the SVC code stream corresponding to H.264/AVC, including a brief introduction of the encoding technology used by SVC corresponding to H.264/AVC. In order to meet the actual needs, after the HEVC CD (COMPACT DISK, optical disc) standard was issued in February 2012, it is an urgent matter to develop HEVC SVC. The JCT-VC conference held in October 2012 called HEVC-based SVC SHVC (Scalable Highefficiency Video Coding, scalable high-performance video coding), and began testing.

Major video coding standards represented by H.264/AVC and HEVC all adopt a hybrid coding framework based on predictive coding, transform coding and statistical coding. Under this framework, the quantization operation on the post-prediction residual unit is the main reason for the degradation of video coding quality. The greater the difference in information between adjacent units after prediction (that is, the greater the difference in residuals), the more likely it will be quantized/dequantized, and mutations will be introduced on the boundary of the block, and thus block effects will appear. H.264/AVC introduces loop filtering technology to remove the block effect in the reconstructed image. The latest HEVC standard has two video post-processing technologies, one is Deblocking Filtering (DBF) technology, and the other is Pixel Adaptive Offset (Sample Adaptive Offset, SAO), which is used to improve the reconstructed image. the quality of. The block effect generally appears on the prediction boundary or the transformation boundary. DBF determines whether the boundary is filtered or not and the strength of the filter according to the coding mode, quantization parameter size and residual coefficient, and performs corresponding operations to achieve smooth image operation. DBF can effectively improve the subjective and objective quality of video while increasing the computational complexity of the codec.

However, in the prior art, due to inaccurate assignment of the boundary strength (Boundary Strength, BS) of the image block in the DBF, the coding efficiency of the enhancement layer cannot be further improved.

Contents of the invention

Embodiments of the present invention provide a boundary strength determination method, a deblocking filtering method, and a device for improving coding efficiency.

On the one hand, an embodiment of the present invention provides a method for determining a boundary strength BS, including:

Determining the possible filtering boundaries of the deblocking filter DBF;

Obtain the coding mode and coding information of the adjacent image blocks on both sides of the possible filtering boundary;

When the encoding modes of the adjacent image blocks are not intra-frame Intra mode, and the encoding modes of the adjacent image blocks include at least one base layer BaseLayer mode, then according to the encoding information, the possible filtering The border strength BS of the border is set to different border strength values.

With reference to an implementation manner in one aspect, in a first possible implementation manner, the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes:

Acquiring the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients;

The different boundary strength values include a first boundary strength value and a second boundary strength value, the second boundary strength value is greater than the first boundary strength value, and the possible filter The boundary strength BS of the boundary is set to different boundary strength values, including:

If the encoding modes of the adjacent image blocks are all BaseLayer modes and the quantization coefficient identifier indicates that none of the adjacent image blocks have quantization coefficients, then set the boundary strength BS of the possible filtering boundary as the first boundary strength.

With reference to an implementation manner in one aspect, in a second possible implementation manner, the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and motion vectors of the adjacent image blocks;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes:

Set the reference image of the image block whose encoding mode is the BaseLayer mode according to the preset rules and set the motion vector of the image block whose encoding mode is the BaseLayer mode to correspond to when the block at the same position in the reference image is stationary parameter;

Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the possible filtering boundary, reference images of the adjacent image blocks, and motion vectors of the adjacent image blocks;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the possible filtering according to the encoding information The boundary strength BS of the boundary is set to different boundary strengths, including:

If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is smaller than a preset threshold, then set the boundary strength BS of the possible filtering boundary as the first boundary strength.

With reference to the second possible implementation manner in one aspect, in a third possible implementation manner, setting the boundary strength BS of the possible filtering boundary to a different boundary strength according to the encoding information further includes:

If the quantization coefficient flag indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different reference images, or the adjacent image blocks move If the vector difference is greater than or equal to a preset threshold, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

With reference to an implementation manner in one aspect, in a fourth possible implementation manner, the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes:

Acquiring the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the possible filtering according to the encoding information The boundary strength BS of the boundary is set to different boundary strengths, including:

If the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, then set the boundary strength BS of the possible filtering boundary as the second boundary strength.

With reference to the fourth possible implementation manner in one aspect, in a fifth possible implementation manner, the encoding information further includes a reference image of the adjacent image block;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary further includes:

Set the reference image of the image block whose encoding mode is BaseLayer mode according to the preset rule; obtain the reference image of the adjacent image block on both sides of the possible filtering boundary;

The setting the boundary strength BS of the possible filtering boundary as the second different boundary strength according to the encoding information further includes:

If the quantization coefficient flag indicates that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have different reference images, then set the boundary strength BS of the possible filtering boundary as the second boundary strength.

With reference to the fifth possible implementation manner in one aspect, in a sixth possible implementation manner, the encoding information further includes a motion vector of the adjacent image block;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary further includes:

Set the motion vector of the image block whose encoding mode is BaseLayer mode as the parameter corresponding to when the block at the same position in the reference image is still;

Acquiring motion vectors of adjacent image blocks on both sides of the possible filtering boundary;

The setting the boundary strength BS of the possible filtering boundary as the first different boundary strength value according to the encoding information further includes:

If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is greater than or is equal to the preset threshold, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

With reference to the sixth possible implementation manner in one aspect, in a seventh possible implementation manner, setting the boundary strength BS of the possible filtering boundary to a different boundary strength according to the encoding information further includes:

If the quantization coefficient flag indicates that there are no quantization coefficients in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than If the threshold is preset, the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

With reference to any one of the first to sixth possible implementation manners in one aspect, in an eighth possible implementation manner, the first boundary strength is 0, and the second boundary strength is 1.

The second aspect of the embodiment of the present invention provides a filtering method for deblocking effect, including:

Determining the possible filtering boundaries of the deblocking filter DBF;

Obtain the coding mode and coding information of the adjacent image blocks on both sides of the possible filtering boundary;

When the encoding modes of the adjacent image blocks are not intra-frame Intra mode, and the encoding modes of the adjacent image blocks include at least one base layer BaseLayer mode, then according to the encoding information, the possible filtering The border strength BS of the border is set to different border strength values;

Using the determined boundary strength value as a reference factor to obtain a first threshold and a second threshold, the first threshold is used to determine whether to filter the possible filtering boundary, and the second threshold is used to determine a filtering strength for filtering the possible filtering boundaries that need to be filtered;

Determine whether the possible filtering boundary needs to be filtered according to the gradient of pixels within a predetermined range in adjacent image blocks on both sides of the possible filtering boundary and the first threshold;

If it is determined that filtering is required, the filter for performing filtering is determined according to the relationship between the gradient of pixels in the predetermined range and the second threshold value in adjacent image blocks on both sides of the possible filtering boundary, and the determined filter is used to perform the necessary filtering. Filtering is performed on the possible filtering boundaries of the filtering.

In combination with the implementation manners of the two aspects, in a first possible implementation manner, the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes:

Acquiring the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the possible filtering according to the encoding information The boundary strength BS of the boundary is set to different boundary strength values, including:

If the encoding modes of the adjacent image blocks are all BaseLayer modes and the quantization coefficient identifier indicates that none of the adjacent image blocks have quantization coefficients, then set the boundary strength BS of the possible filtering boundary as the first boundary strength.

Combining the implementation manners of the two aspects, in a second possible implementation manner, the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and motion vectors of the adjacent image blocks;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes:

Set the reference image of the image block whose encoding mode is the BaseLayer mode according to the preset rules and set the motion vector of the image block whose encoding mode is the BaseLayer mode to correspond to when the block at the same position in the reference image is stationary parameter;

Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the possible filtering boundary, reference images of the adjacent image blocks, and motion vectors of the adjacent image blocks;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the possible filtering according to the encoding information The boundary strength BS of the boundary is set to the first different boundary strength values specifically including:

If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is smaller than a preset threshold, then set the boundary strength BS of the possible filtering boundary as the first boundary strength.

In combination with the second possible implementation manner of the two aspects, in a third possible implementation manner, the boundary strength BS of the possible filtering boundary is set as the first boundary strength or the second boundary strength BS according to the encoding information Strength also includes:

If the quantization coefficient flag indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different reference images, or the adjacent image blocks move If the vector difference is greater than or equal to a preset threshold, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

In combination with the implementation of the second aspect, in a fourth possible implementation, the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes:

Acquiring the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the possible filtering according to the encoding information The boundary strength BS of the boundary is set to different boundary strength values, including:

If the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, then set the boundary strength BS of the possible filtering boundary as the second boundary strength.

With reference to the fourth possible implementation manner of the two aspects, in a fifth possible implementation manner, the encoding information further includes a reference image of the adjacent image block;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary further includes:

Set the reference image of the image block whose encoding mode is BaseLayer mode according to the preset rule; obtain the reference image of the adjacent image block on both sides of the possible filtering boundary;

The setting the boundary strength BS of the possible filtering boundary as the first boundary strength or the second boundary strength according to the encoding information further includes:

If the quantization coefficient flag indicates that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have different reference images, then set the boundary strength BS of the possible filtering boundary as the second boundary strength.

With reference to the fifth possible implementation manner of the two aspects, in a sixth possible implementation manner, the encoding information further includes a motion vector of the adjacent image block;

The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary further includes:

Set the motion vector of the image block whose encoding mode is BaseLayer mode as the parameter corresponding to when the block at the same position in the reference image is still; obtain the motion vector of the adjacent image block on both sides of the possible filtering boundary ;

The setting the boundary strength BS of the possible filtering boundary as the first boundary strength or the second boundary strength according to the encoding information further includes:

If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is greater than or is equal to the preset threshold, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

In combination with the sixth possible implementation manner of the two aspects, in the seventh possible implementation manner, setting the boundary strength BS of the possible filtering boundary to different boundary strength values according to the encoding information further includes:

If the quantization coefficient flag indicates that there are no quantization coefficients in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than If the threshold is preset, the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

With reference to any one of the first to sixth possible implementation manners of the two aspects, in an eighth possible implementation manner, the first boundary strength is 0, and the second boundary strength is 1.

Three aspects of the embodiment of the present invention provide a boundary strength BS determination device, including:

A first boundary determining unit, configured to determine possible filtering boundaries of the deblocking filter DBF;

A first information acquiring unit, configured to acquire the encoding mode and encoding information of the adjacent image blocks on both sides of the possible filtering boundary determined by the first boundary determining unit;

The first BS determining unit is configured to be used when none of the encoding modes of the adjacent image blocks acquired by the first information acquiring unit is Intra mode, and the encoding modes of the adjacent image blocks include at least one basic layer BaseLayer mode, set the boundary strength BS of the possible filtering boundary to different boundary strength values according to the encoding information.

In combination with the implementation manners of the three aspects, in a first possible implementation manner, the first information acquisition unit is specifically configured to acquire whether the adjacent image blocks on both sides of the possible filtering boundary determined by the first boundary determination unit have Quantization coefficient identifier of the quantization coefficient;

The different boundary strength values include a first boundary strength value and a second boundary strength value, the second boundary strength value is greater than the first boundary strength value, and the first BS determination unit is specifically configured to If the encoding modes of the adjacent image blocks are all BaseLayer modes and the quantization coefficient identifier indicates that the adjacent image blocks have no quantization coefficients, then the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

In combination with the implementation manners of the three aspects, in a second possible implementation manner, the first information acquisition unit is specifically configured to acquire the quantization information included in the encoding information that marks whether the adjacent image blocks have quantization coefficients. A coefficient identifier, a reference image of the adjacent image block, and a motion vector of the adjacent image block;

The first BS determination unit includes: a first parameter setting unit, a first parameter acquisition unit, and a first BS determination subunit;

The first parameter setting unit is configured to set the reference image of the image block whose encoding mode is BaseLayer mode according to a preset rule and set the motion vector of the image block whose encoding mode is BaseLayer mode to be relative to the reference image The corresponding parameters when the block at the same position in the image is still;

The first parameter acquisition unit is configured to acquire quantization coefficient identifiers of adjacent image blocks on both sides of the possible filtering boundary determined by the first boundary determination unit, and reference images of the adjacent image blocks, and the Motion vectors of adjacent image blocks;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the first BS determination subunit is used to determine if the The quantization coefficient identifier indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than a preset threshold, Then the boundary strength BS of the possible filtering boundaries is set as the first boundary strength.

With reference to the second possible implementation manner of the three aspects, in a third possible implementation manner, the first BS determination subunit is further configured to, if the quantization coefficient identifier indicates that at least If one of the image blocks has a quantization coefficient, or the adjacent image blocks have different reference images, or the difference between the motion vectors of the adjacent image blocks is greater than or equal to a preset threshold, then the possible The boundary strength BS of the filter boundary is set to the second boundary strength.

In combination with the implementation manners of the three aspects, in a fourth possible implementation manner, the first information acquisition unit is specifically configured to acquire whether there are adjacent image blocks on both sides of the possible filtering boundary determined by the first boundary determination unit Quantization coefficient identifier of the quantization coefficient;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the first BS determination unit is specifically configured to if the The quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

In combination with the fourth possible implementation of the three aspects, in the fifth possible implementation, the first information acquisition unit is further configured to set the reference of the image block whose encoding mode is BaseLayer mode according to a preset rule image; acquiring reference images of adjacent image blocks on both sides of the possible filtering boundary;

The first BS determination unit is further configured to set the possible The boundary strength BS of the filtered boundary is set to the second boundary strength.

With reference to the fifth possible implementation manner of the three aspects, in a sixth possible implementation manner, the first information acquiring unit is further configured to acquire the motion of the adjacent image block included in the encoding information vector;

The first BS determination unit includes: a second parameter setting unit, a second parameter acquisition unit, and a second BS determination subunit;

The second parameter setting unit is configured to set the motion vector of the image block whose encoding mode is BaseLayer mode as a parameter corresponding to when the block at the same position in the reference image is still;

The second parameter acquisition unit is configured to acquire motion vectors of adjacent image blocks on both sides of the possible filtering boundary;

The second BS determination subunit is configured to if the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the adjacent If the difference between the image block motion vectors is greater than or equal to a preset threshold, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

With reference to the sixth possible implementation manner of the three aspects, in a seventh possible implementation manner, the second BS determining subunit is further configured to: There is no quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the possible filtering boundary is set to Set to the first boundary strength.

In combination with any one of the first to sixth possible implementation manners of the three aspects, in an eighth possible implementation manner, the first boundary strength is 0, and the second boundary strength is 1.

The fourth aspect of the embodiment of the present invention provides a filtering device for deblocking effect, including:

The second boundary determining unit is used to determine possible filtering boundaries of the deblocking filter DBF;

A second information acquisition unit, configured to acquire the encoding mode and encoding information of image blocks adjacent to both sides of the possible filtering boundary determined by the second boundary determination unit;

The second BS determination unit is configured to be used when none of the encoding modes of the adjacent image blocks acquired by the second information acquisition unit is Intra mode, and the encoding modes of the adjacent image blocks include at least one basic layer In BaseLayer mode, set the boundary strength BS of the possible filtering boundary to different boundary strength values according to the encoding information;

a threshold acquisition unit, configured to use the determined boundary strength BS value as a reference factor to acquire a first threshold and a second threshold, and the first threshold is used to determine whether to filter the possible filtering boundaries, so The second threshold is used to determine the filtering strength for filtering the possible filtering boundaries that need to be filtered;

A filtering decision unit, configured to determine whether the possible filtering boundary needs to be adjusted according to the gradient of pixels within a predetermined range in adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determining unit and the first threshold value filter;

The filter control unit is used to determine the filter for performing filtering according to the relationship between the pixel gradient in the predetermined range and the second threshold value in the adjacent image blocks on both sides of the possible filtering boundary if the filtering decision unit determines that filtering is required, and use The determined filter performs filtering processing on the possible filtering boundaries that need to be filtered.

In combination with the implementation manners of the four aspects, in a first possible implementation manner, the second information acquisition unit is specifically configured to acquire whether there are adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determination unit Quantization coefficient identifier of the quantization coefficient;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the second BS determination unit is specifically configured to if the If the encoding modes of the adjacent image blocks are all BaseLayer modes and the quantization coefficient identifier indicates that the adjacent image blocks have no quantization coefficients, then the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

In combination with the implementation manners of the four aspects, in a second possible implementation manner, the second information acquisition unit is specifically configured to acquire the quantization information included in the encoding information that marks whether the adjacent image blocks have quantization coefficients. A coefficient identifier, a reference image of the adjacent image block, and a motion vector of the adjacent image block;

The second BS determination unit includes: a third parameter setting unit, a third parameter acquisition unit, and a third BS determination subunit;

The third parameter setting unit is used to set the reference image of the image block whose encoding mode is BaseLayer mode according to preset rules and set the motion vector of the image block whose encoding mode is BaseLayer mode relative to the reference image The corresponding parameters when the block at the same position is stationary;

The third parameter acquisition unit is configured to acquire quantization coefficient identifiers of adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determination unit, and reference images of the adjacent image blocks, and the Motion vectors of adjacent image blocks;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the third BS determination subunit is used to determine if the The quantization coefficient identifier indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than a preset threshold, Then the boundary strength BS of the possible filtering boundaries is set as the first boundary strength.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the third BS determining subunit is further configured to: if the quantization coefficient identifier indicates that at least If one of the image blocks has a quantization coefficient, or the adjacent image blocks have different reference images, or the difference between the motion vectors of the adjacent image blocks is greater than or equal to a preset threshold, then the possible The boundary strength BS of the filter boundary is set to the second boundary strength.

In combination with the implementation manners of the fourth aspect, in a fourth possible implementation manner, the second information acquisition unit is specifically configured to acquire whether there are adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determination unit Quantization coefficient identifier of the quantization coefficient;

The different boundary strength values include a first boundary strength value and a second boundary strength value, and the second boundary strength value is greater than the first boundary strength value; the second BS determination unit is specifically configured to if the The quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

In combination with the fourth possible implementation of the four aspects, in a fifth possible implementation, the second information acquisition unit is further configured to set the reference of the image block whose encoding mode is BaseLayer mode according to a preset rule image; acquiring reference images of adjacent image blocks on both sides of the possible filtering boundary;

The second BS determining unit is further configured to set the possible The boundary strength BS of the filtered boundary is set to the second boundary strength.

With reference to the fifth possible implementation manner of the four aspects, in a sixth possible implementation manner, the first information acquiring unit is further configured to acquire the motion of the adjacent image block included in the encoding information vector;

The second BS determination unit includes: a fourth parameter setting unit, a fourth parameter acquisition unit, and a fourth BS determination subunit;

The fourth parameter setting unit is configured to set the motion vector of the image block whose encoding mode is BaseLayer mode as a parameter corresponding to when the block at the same position in the reference image is still;

The fourth parameter acquisition unit is configured to acquire motion vectors of adjacent image blocks on both sides of the possible filtering boundary;

The fourth BS determination subunit is configured to if the quantization coefficient flag indicates that none of the adjacent image blocks has quantization coefficients, and the adjacent image blocks have the same reference image, and the adjacent If the difference between the image block motion vectors is greater than or equal to a preset threshold, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

With reference to the sixth possible implementation manner of the four aspects, in a seventh possible implementation manner, the fourth BS determining subunit is further configured to: There is no quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the possible filtering boundary is set to Set to the first boundary strength.

In combination with any one of the first to sixth possible implementation manners of the four aspects, in an eighth possible implementation manner, the first boundary strength is 0, and the second boundary strength is 1.

It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages: when the encoding modes of adjacent image blocks are not Intra mode, and the encoding modes of adjacent image blocks include at least one BaseLayer mode, then possible The boundary strength BS of the filtering boundary is set to different boundary strength values, and the BS settings are no longer all set to the same strength, which makes the BS setting more reasonable, thereby improving the coding efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1A is a schematic flow chart of the first method in the first method of the embodiment of the present invention;

FIG. 1A-1 is a schematic diagram of an image block structure according to an embodiment of the present invention;

FIG. 1A-2 is a schematic diagram of a prediction block structure according to an embodiment of the present invention;

1A-3 are schematic diagrams of the structure of a transform block according to an embodiment of the present invention;

Figure 1A-4 is a schematic diagram of a boundary structure where DBF may be performed in an embodiment of the present invention;

1A-5 are schematic flowcharts of the second method in the first method of the embodiment of the present invention;

1A-6 are schematic flowcharts of the third method in the first method of the embodiment of the present invention;

1A-7 are schematic flowcharts of the fourth method in the first method of the embodiment of the present invention;

1A-8 are schematic flow charts of the fifth method in the first method of the embodiment of the present invention;

1A-9 are schematic flowcharts of the sixth method in the first method of the embodiment of the present invention;

1A-10 are schematic flowcharts of the seventh method in the first method of the embodiment of the present invention;

1A-11 are schematic flowcharts of the eighth method in the first method of the embodiment of the present invention;

Fig. 1B is a schematic flow chart of the second method of the embodiment of the present invention;

Fig. 2 is a schematic flow chart of the third method of the embodiment of the present invention;

Fig. 3 is a schematic flow chart of the fourth method of the embodiment of the present invention;

Fig. 4 is a schematic diagram of a pixel gradient according to an embodiment of the present invention;

5 is a schematic structural diagram of a first device according to an embodiment of the present invention;

6 is a schematic structural diagram of a second device according to an embodiment of the present invention;

7 is a schematic structural diagram of a third device according to an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of a fifth device according to the embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a sixth device according to an embodiment of the present invention;

Fig. 10 is a schematic structural diagram of a seventh device according to an embodiment of the present invention;

Fig. 11 is a schematic structural diagram of the first device according to the embodiment of the present invention;

Fig. 12 is a schematic structural diagram of a second device according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of a device structure of an embodiment of the present invention taking a mobile phone as an example.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The inventor first analyzed the scheme of DBF, please refer to the following:

HEVC-based scalable video coding (SHVC) uses DBF to remove the blocking effect of the reconstructed image in the enhancement layer to improve its subjective and objective quality. DBF is a pixel filtering technique that is performed on the luminance component and chrominance component of the reconstructed image separately. It performs sequentially on each image block in the reconstructed image, first filters the vertical boundary, and then filters the horizontal boundary. Performing a DBF operation on an image block includes the following three steps:

(1) Determine the possible filtering boundaries of the DBF. The aforementioned determination of the filtering boundary of the DBF is to determine the boundary for performing DBF filtering according to the boundary of the prediction unit and the boundary of the transformation unit included in the image block.

The prediction unit mentioned above means that an image block may be divided into multiple units for prediction when encoding, and each unit is called a prediction unit, and the boundary between adjacent prediction units is called a prediction unit boundary. The above transformation unit means that the predicted residual of the image block is divided into different units for transformation. Each unit is called a transformation unit, and the boundary between adjacent transformation units is called a transformation unit boundary. A prediction unit boundary or a transform unit boundary is a possible filtering boundary of the DBF.

(2) Determine BS (Boundary Strength, boundary strength). The above determination of the BS is to assign the BS value according to the image block coding mode, motion information and quantization coefficient.

The above determination of the BS is to determine the boundary strength according to the coding mode of the image block, the motion information and the quantization coefficient. The above BS is used to characterize the abruptness of the boundary of the DBF filter boundary. In SHVC, the BS takes three values: 0, 1 and 2. The encoding modes include Intra (intra-frame) mode, BaseLayer (basic layer) mode and Inter (inter-frame) mode. The motion information mainly includes the prediction direction of the image block in time domain prediction, the index of the reference image and the motion vector.

In step (2) of the above process, the specific implementation of BS assignment is as follows: for the convenience of description, it is assumed that P is the left (upper) image block of the possible filtering boundary, and Q is the right (lower) image block of the possible filtering boundary. At present, the general process of determining BS is: if the encoding mode of P or Q is Intra mode or BaseLayer mode, assign BS=2; otherwise, if P or Q has non-zero quantization coefficients (non-0coeffs), assign BS=1 ;Otherwise, if the reference frames of P and Q are different (differentref), assign BS=1; otherwise, if the absolute value of the difference between the horizontal components of the P and Q motion vectors is greater than or equal to 4 or the absolute value of the difference between the vertical components is greater than or equal to 4 , then assign BS=1; otherwise assign BS=0.

(3) Judgment of filtering strength. The above filtering strength judgment is to determine whether the boundary is to be filtered according to BS and QP (QuantizationParameter, quantization parameter). If filtering, determine whether to use a strong filter or a weak filter for filtering.

The parameters β and t _c are also defined in the DBF to judge the filtering strength, specifically including whether to filter at the boundary, and if the filtering adopts strong filtering or weak filtering. Among them, β and t _c are a set of specific numbers derived from BS and QP. At present, it is generally determined whether to perform filtering according to the gradient change of pixels on the boundary and the relationship with β and _tc , and the strength of filtering during filtering is determined. After the filtering intensity is determined, the corresponding filter is called to filter the three rows of pixels on both sides of the boundary to achieve the purpose of smoothing the boundary.

Based on the above description, the size of the BS value has an important impact on the selection of filtering strength and the complexity of encoding and decoding. The Intra mode uses the spatially adjacent pixels of the current prediction unit to predict the prediction unit. The BaseLayer mode uses the same position image sampled on the base layer to predict the prediction unit. The Inter mode refers to using the image in the time domain to predict the prediction unit. At present, in the process of determining the BS value, the BaseLayer mode and the Intra mode are classified into one category, so that the image blocks of the BaseLayer mode and the Intra mode have the same filter strength, and the boundary strength BS is set to 2, that is, the filter strength is the same, resulting in BS The setting is not accurate enough, which affects the coding efficiency of the enhancement layer.

Based on the above analysis, an embodiment of the present invention provides a method for determining a boundary strength BS, as shown in FIG. 1A , including:

101A: Determine possible filtering boundaries of the deblocking filter DBF;

A specific solution for determining the possible boundaries of image blocks for DBF may be:

Obtain the prediction block in the image block, the above prediction block refers to the above image block divided into one or more image units; the image block is a square image block as shown in Figure 1A-1, and the prediction block is two as shown in Figure 1A-2 A horizontal rectangular prediction block; Figure 1A-2 shows that the image block is divided into two prediction blocks, and how many prediction blocks the image block is divided into can be set arbitrarily, and the embodiments of the present invention are not limited;

Obtain the transformation block in the image block. The above transformation block refers to dividing the residual unit corresponding to the image block into one or more smaller residual units. The above residual unit refers to the residual of all prediction blocks predicted according to different coding modes. difference; the transform block is two vertical rectangular transform blocks as shown in Figure 1A-3; as shown in Figure 1A-3, the image block is divided into two transform blocks, and how many prediction blocks the transform block is divided into can be set arbitrarily , the embodiment of the present invention is not limited;

All the boundaries of the above-mentioned prediction block and the above-mentioned transformation block constitute the boundary where DBF may be performed on the image block. Please compare Figure 1A-2 and Figure 1A-3, the dotted line shown in Figure 1A-4 is the boundary where DBF may be performed, and all the boundaries in Figure 1A-2 and Figure 1A-3 are the dotted line above.

102A: Obtain the encoding mode and encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

The above encoding information includes at least one or a combination of multiple of the following information, specifically as follows: a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient, a reference image of the above-mentioned adjacent image block, the above-mentioned adjacent image block The motion vector of the image block.

103A: When the encoding modes of the above-mentioned adjacent image blocks are not intra-frame Intra mode, and the encoding modes of the above-mentioned adjacent image blocks include at least one base layer BaseLayer mode, then according to the above-mentioned coding information, the above-mentioned possible filtering boundary The boundary strength BS is set to different boundary strength values.

In the embodiment of the present invention, when the encoding modes of adjacent image blocks are not Intra mode, and the encoding modes of adjacent image blocks include at least one BaseLayer mode, the boundary strength BS of the possible filtering boundary is set to a different boundary Intensity value, the BS settings are no longer all set to the same intensity, which makes the BS settings more reasonable, thereby improving the coding efficiency. The different boundary strength values in the above 103A include the first boundary strength and the second boundary strength, the above second boundary strength is greater than the above first boundary strength; the first boundary strength can be 0, the result of setting the boundary strength to 0 will be The filtering strength is 0, that is, no filtering; the first boundary strength may also be close to 0, that is, the filtering strength is low. The specific value of the first boundary strength may be set according to factors such as requirements for filtering strength and device processing capability, and the specific setting value is not limited in this embodiment of the present invention.

Further, the above-mentioned encoding information includes a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient; as shown in Figure 1A-5, the scheme of this embodiment is specifically as follows:

After executing 101A and determining the possible filtering boundary of the deblocking filter DBF, correspondingly, in the above 102A, obtaining the encoding information of the adjacent image blocks on both sides of the above possible filtering boundary specifically includes:

102A-1: Obtain the quantization coefficient identification of whether the adjacent image blocks on both sides of the above possible filtering boundary have quantization coefficients;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value. Correspondingly, in the above-mentioned 103A, the above-mentioned possible filtering boundary The boundary strength BS is set to different boundary strength values specifically including:

103A-1: If the encoding modes of the above-mentioned adjacent image blocks are both BaseLayer mode and the quantization coefficient flag indicates that the above-mentioned adjacent image blocks have no quantization coefficients, then set the boundary strength BS of the above-mentioned possible filtering boundary to the first boundary strength .

In the above schemes, the BS settings are not all set to the same intensity, but the impact of the quantization coefficient on the BS setting is further considered. The encoding modes of adjacent image blocks are BaseLayer mode and the quantization coefficient identifier indicates the above-mentioned adjacent When there are no quantization coefficients in the image block, set BS to the first boundary strength with a smaller filtering strength, so that the BS value setting is more reasonable, and the calculation of the codec, especially the decoder, can be reduced without affecting the filtering effect. complexity and improve coding efficiency.

Further, the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and a motion vector of the adjacent image block; as shown in FIG. 1A-6 Show, the scheme of this embodiment is specifically as follows:

After executing 101A and determining the possible filtering boundaries of the deblocking filter DBF, correspondingly, the above-mentioned 102A obtains the encoding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundaries, specifically including:

102A-2: Set the reference image of the above image block whose encoding mode is BaseLayer mode according to the preset rules and set the motion vector of the above image block whose encoding mode is BaseLayer mode to correspond to when the same position block in the reference image is still parameters;

Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the above-mentioned possible filtering boundary, reference images of the above-mentioned adjacent image blocks, and motion vectors of the above-mentioned adjacent image blocks;

Correspondingly, in the above-mentioned 103A, setting the boundary strength BS of the above-mentioned possible filtering boundary to different boundary strength values according to the above-mentioned encoding information specifically includes:

103A-2: If the quantization coefficient flag indicates that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than the preset threshold, then set the boundary strength BS of the above possible filtering boundary as the first boundary strength.

In the above solution, the BS setting is not only no longer set to the same strength, but also further considers the influence of the difference between the quantization coefficient, the reference image and the motion vector of the adjacent image block on the BS setting, and the quantization coefficient flag indicates the above Adjacent image blocks have no quantization coefficients, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is less than the preset threshold, then the boundary of the above-mentioned possible filtering boundary The strength BS is set to the first boundary strength, which makes the BS value setting more reasonable, which can reduce the computational complexity of the codec, especially the decoder, and improve the coding efficiency without affecting the filtering effect.

Further, as shown in FIG. 1A-7, after 101A is executed, the possible filtering boundaries of the deblocking filter DBF are determined, and 102A-2, the encoding mode is set to the reference image of the above-mentioned image block in BaseLayer mode according to preset rules and Set the motion vector of the above-mentioned image block whose encoding mode is BaseLayer mode as the parameter corresponding to when the block at the same position in the reference image is still; obtain the quantization coefficient identification of the adjacent image block on both sides of the above-mentioned possible filtering boundary, and the above-mentioned After the reference image of the adjacent image block and the motion vector of the above-mentioned adjacent image block, in the above-mentioned 103A, according to the above-mentioned 103A, the encoding information sets the boundary strength BS of the above-mentioned possible filtering boundary to a different boundary strength value or include:

103A-3: If the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different reference images, or the motion vector of the adjacent image blocks If the difference is greater than or equal to the preset threshold, then the boundary strength BS of the above possible filtering boundary is set as the second boundary strength.

The above scheme also provides the setting of the second boundary strength on the basis of the previous embodiment, which makes the BS value setting more reasonable, and can reduce the calculation complexity of the codec, especially the decoder, without affecting the filtering effect degree, improving the coding efficiency.

Further, the above-mentioned encoding information includes a quantization coefficient identifier marking whether the above-mentioned adjacent image blocks have quantization coefficients; as shown in Figure 1A-8, the scheme of this embodiment is specifically as follows:

After executing 101A, after determining the possible filtering boundaries of the deblocking filter DBF, corresponding to the above-mentioned 102A, obtaining the encoding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundaries specifically includes:

102A-4: Obtain the quantization coefficient identification of whether the adjacent image blocks on both sides of the above possible filtering boundary have quantization coefficients;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, in the above-mentioned 103A, the above-mentioned possible filtering boundary The boundary strength BS is set to different boundary strength values specifically including:

103A-4: If the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, set the boundary strength BS of the possible filtering boundary as the second boundary strength.

In the above solution, the BS setting is not only no longer set to the same intensity, but also further considers the influence of the quantization coefficient on the BS setting, and the quantization coefficient indicator indicates that at least one of the above-mentioned adjacent image blocks has a quantization coefficient , then set the boundary strength BS of the above-mentioned possible filtering boundary as the second boundary strength, so that the BS value setting is more reasonable, and can reduce the computational complexity of the codec, especially the decoder, without affecting the filtering effect, and improve coding efficiency.

Further, the above encoding information also includes reference images of the above adjacent image blocks; as shown in Figure 1A-9, the solution of this embodiment is specifically as follows:

After executing 101A and determining the possible filtering boundary of the deblocking filter DBF, corresponding to the above-mentioned 102A, in addition to performing 102A-4 to obtain whether the adjacent image blocks on both sides of the above-mentioned possible filtering boundary have quantization coefficient identifiers of quantization coefficients, Obtaining the encoding information of the adjacent image blocks on both sides of the above possible filtering boundary also includes:

102A-5: Set the reference image of the above image block whose encoding mode is BaseLayer mode according to the preset rule; acquire the reference image of the adjacent image block on both sides of the above possible filtering boundary;

Correspondingly, in the above-mentioned 103A, setting the boundary strength BS of the above-mentioned possible filtering boundary to different boundary strength values according to the above-mentioned coding information also includes:

103A-5: If the above-mentioned quantization coefficient flag indicates that none of the above-mentioned adjacent image blocks have quantization coefficients, and the above-mentioned adjacent image blocks have different reference images, then set the boundary strength BS of the above-mentioned possible filtering boundary as the second boundary strength.

In the above schemes, the BS settings are not all set to the same intensity, but the influence of the quantization coefficient and the reference image of the adjacent image block on the BS setting is further considered. If there is no quantization coefficient, and the above-mentioned adjacent image blocks have different reference images, then the boundary strength BS of the above-mentioned possible filtering boundary is set as the second boundary strength, so that the BS value setting is more reasonable, and the premise of not affecting the filtering effect can be The reduction reduces the computational complexity of the codec, especially the decoder, and improves the coding efficiency.

Further, the above encoding information also includes the motion vectors of the above adjacent image blocks; as shown in Figure 1A-10, the solution of this embodiment is specifically as follows:

After executing 101A, after determining the possible filtering boundary of the deblocking filter DBF, corresponding to the above 102A, in addition to performing 102A-4 to obtain whether the adjacent image blocks on both sides of the above possible filtering boundary have quantization coefficient identifiers of quantization coefficients, and In 102A-5, set the reference image of the above-mentioned image block whose encoding mode is BaseLayer mode according to the preset rule; besides obtaining the reference image of the adjacent image block on both sides of the above-mentioned possible filtering boundary, obtain the corresponding image on both sides of the above-mentioned possible filtering boundary. The coding information of adjacent image blocks also includes:

102A-6: Set the motion vector of the above-mentioned image block whose encoding mode is BaseLayer mode as the parameter corresponding to when the block at the same position in the reference image is still; obtain the motion of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary vector;

Correspondingly, in the above-mentioned 103A, setting the boundary strength BS of the above-mentioned possible filtering boundary to different boundary strength values according to the above-mentioned coding information also includes:

103A-6: If the quantization coefficient flag indicates that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is greater than or is equal to the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set as the second boundary strength.

In the above scheme, the BS setting is not only no longer set to the same strength, but also further considers the influence of the quantization coefficient, the reference image of the adjacent image block, and the difference between the motion vector of the adjacent image block on the BS setting , the quantization coefficient flag indicates that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is greater than or equal to the preset threshold , then set the boundary strength BS of the above-mentioned possible filtering boundary as the second boundary strength, so that the BS value setting is more reasonable, and can reduce the computational complexity of the codec, especially the decoder, without affecting the filtering effect, and improve coding efficiency.

Further, as shown in Figure 1A-11, the solution of this embodiment is specifically as follows:

After executing 101A, determine the possible filtering boundary of the deblocking filter DBF, corresponding to 102A, in addition to performing 102A-4 to obtain whether the adjacent image blocks on both sides of the above-mentioned possible filtering boundary have quantization coefficient identifiers of quantization coefficients, in 102A-5 , according to preset rules, set the encoding mode to the reference image of the above image block in BaseLayer mode; obtain the reference images of adjacent image blocks on both sides of the above possible filtering boundary, and in 102A-6, set the above encoding mode to BaseLayer mode The motion vector of the above-mentioned image block is set as the corresponding parameter when the block at the same position in the reference image is still; except for obtaining the motion vector of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary, corresponding to the above-mentioned 103A, according to the above-mentioned encoding Information to set the boundary strength BS of the above possible filtering boundaries to different boundary strength values also includes:

103A-7: If the quantization coefficient flag indicates that there are no quantization coefficients in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than If the threshold is preset, then the boundary strength BS of the above possible filtering boundary is set as the first boundary strength.

On the basis of the previous embodiment, the above solution also gives a solution of how to set the first boundary strength, which is a lower filtering strength, so that the BS value setting is more reasonable, and the codec can be reduced without affecting the filtering effect. Especially the computational complexity of the decoder improves the coding efficiency.

The embodiment of the present invention also provides a deblocking filtering method, as shown in FIG. 1B, including:

101B: Determine the possible filtering boundaries of the deblocking filter DBF;

102B: Obtain the encoding mode and encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

The above encoding information includes at least one or a combination of multiple of the following information, specifically as follows: a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient, a reference image of the above-mentioned adjacent image block, the above-mentioned adjacent image block The motion vector of the image block.

103B: When the encoding modes of the adjacent image blocks are not intra-frame Intra mode, and the encoding modes of the adjacent image blocks include at least one base layer BaseLayer mode, then according to the above encoding information, the above possible filtering boundaries The boundary strength BS is set to different boundary strength values.

The above-mentioned different boundary strength values may be a first boundary strength value and a second boundary strength value, wherein the above-mentioned second boundary strength value may be greater than the above-mentioned first boundary strength value; the above-mentioned first boundary strength value may be 0, and the boundary The result of setting the strength value to 0 is that the filtering strength is 0, that is, no filtering; the first boundary strength value can also be close to 0, that is, the filtering strength is low.

104B: Use the above-mentioned determined BS as a reference factor to obtain a first threshold and a second threshold, the above-mentioned first threshold is used to determine whether to filter the above-mentioned possible filtering boundaries, and the above-mentioned second threshold is used to determine whether to filter The filtering strength of the above-mentioned possible filtering boundaries for filtering;

105B: Determine whether the above-mentioned possible filtering boundary needs to be filtered according to the gradient of pixels within a predetermined range in adjacent image blocks on both sides of the above-mentioned possible filtering boundary and the above-mentioned first threshold;

In the above 105B, the adjacent predetermined range may be three left and right of the current image block, and the first threshold and the second threshold may be β and t _c , which will be described in more detail in subsequent embodiments as an example.

106B: If it is determined that filtering is required, determine the filter for performing filtering according to the relationship between the gradient of pixels within a predetermined range and the second threshold in adjacent image blocks on both sides of the possible filtering boundary, and use the determined filter to perform filtering for the above needs The above-mentioned possible filtering boundaries for filtering are subjected to filtering processing.

In the embodiment of the present invention, when the encoding modes of adjacent image blocks are not Intra mode, and the encoding modes of adjacent image blocks include at least one BaseLayer mode, the boundary strength BS of the possible filtering boundary is set to a different boundary Intensity value, the BS settings are no longer all set to the same intensity, which makes the BS settings more reasonable, thereby improving the coding efficiency.

Further, the above encoding information includes a quantization coefficient identification marking whether the above adjacent image blocks have quantization coefficients;

Correspondingly, the acquisition of the encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary specifically includes:

Obtain the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned boundary strength of the above-mentioned possible filtering boundary according to the above-mentioned coding information BS is set to different boundary strength values specifically including:

If the encoding modes of the adjacent image blocks are both BaseLayer mode and the quantization coefficient flag indicates that none of the adjacent image blocks have quantization coefficients, then set the boundary strength BS of the possible filtering boundary as the first boundary strength.

In the above schemes, the BS settings are not all set to the same intensity, but the impact of the quantization coefficient on the BS setting is further considered. The encoding modes of adjacent image blocks are BaseLayer mode and the quantization coefficient identifier indicates the above-mentioned adjacent When there are no quantization coefficients in the image block, set BS to the first boundary strength with a smaller filtering strength, so that the BS value setting is more reasonable, and the calculation of the codec, especially the decoder, can be reduced without affecting the filtering effect. complexity and improve coding efficiency.

Further, the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and a motion vector of the adjacent image block;

Correspondingly, the acquisition of the encoding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary further includes:

Setting the encoding mode as the reference image of the above-mentioned image block of the BaseLayer mode according to the preset rules and setting the motion vector of the above-mentioned image block of the above-mentioned encoding mode as the BaseLayer mode as parameters corresponding to when the block at the same position in the reference image is stationary;

Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the above-mentioned possible filtering boundary, reference images of the above-mentioned adjacent image blocks, and motion vectors of the above-mentioned adjacent image blocks;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned boundary strength of the above-mentioned possible filtering boundary according to the above-mentioned coding information BS is set to different boundary strength values specifically including:

If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than a preset threshold, then the The boundary strength BS of the aforementioned possible filtering boundaries is set to the first boundary strength.

Further, the above-mentioned setting of the boundary strength BS of the above-mentioned possible filtering boundary to different boundary strength values according to the above-mentioned encoding information specifically includes:

If the quantization coefficient flag indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different reference images, or the difference between the motion vectors of the adjacent image blocks is greater than or is equal to the preset threshold, then the boundary strength BS of the above possible filtering boundary is set as the second boundary strength.

Further, the above encoding information includes a quantization coefficient identification marking whether the above adjacent image blocks have quantization coefficients;

Correspondingly, the acquisition of the encoding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary specifically includes:

Obtain the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned boundary strength of the above-mentioned possible filtering boundary according to the above-mentioned coding information BS is set to different boundary strength values specifically including:

If the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

Further, the above encoding information also includes reference images of the above adjacent image blocks:

Correspondingly, the acquisition of the encoding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary specifically includes:

Set the reference image of the above-mentioned image block whose encoding mode is BaseLayer mode according to the preset rule; obtain the reference image of the adjacent image block on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned setting of the boundary strength BS of the above-mentioned possible filtering boundary to different boundary strength values according to the above-mentioned encoding information specifically includes:

If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have different reference images, then set the boundary strength BS of the possible filtering boundary as the second boundary strength.

Further, the above-mentioned coding information also includes the motion vectors of the above-mentioned adjacent image blocks;

Correspondingly, the acquisition of the encoding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary specifically includes:

Set the motion vector of the above-mentioned image block whose encoding mode is BaseLayer mode as a parameter corresponding to when the block at the same position in the reference image is still; obtain the motion vector of the adjacent image block on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned setting of the boundary strength BS of the above-mentioned possible filtering boundary to different boundary strength values according to the above-mentioned coding information also includes:

If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is greater than or equal to a preset threshold , then set the boundary strength BS of the above possible filtering boundary as the second boundary strength.

Further, the above-mentioned setting of the boundary strength BS of the above-mentioned possible filtering boundary to different boundary strength values according to the above-mentioned coding information also includes:

If the quantization coefficient flag indicates that there are no quantization coefficients in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than a preset threshold, Then set the boundary strength BS of the above-mentioned possible filtering boundary as the first boundary strength.

Subsequent embodiments will use HEVC-related protocol scenarios as an example to illustrate the above solutions in more detail.

The implementation process of the embodiment of the present invention is exactly the same at the encoding end and the decoding end, and does not involve modification of the code stream structure. The specific implementation method of the technology of the embodiment of the present invention is described from the decoding end. The solution of the embodiment of the present invention is: perform DBF after decoding a complete reconstructed image at the decoding end. The above-mentioned reconstructed image is composed of multiple reconstructed image blocks (the reconstructed image blocks will be referred to as image blocks hereinafter without causing confusion). The image blocks in the reconstructed image are subjected to DBF operations sequentially from left to right and from top to bottom. When all image blocks have performed DBF operations, the DBF operation on the reconstructed image is also completed.

In the following embodiments, the three aspects of determining the possible filtering boundary of the DBF, determining the BS value, and determining the filtering strength will be illustrated as follows:

1. Determine the possible filtering boundaries of DBF:

A specific solution for determining the possible boundaries of image blocks for DBF may be:

Obtain the prediction block in the image block. The above prediction block refers to an image block divided into one or more image units; the image block is a square image block as shown in Figure 1A-1, and the prediction block is two as shown in Figure 1A-2. A horizontal rectangular prediction block; as shown in Figure 1A-2, the image block is divided into two prediction blocks, and the number of prediction blocks that the image block is divided into can be set arbitrarily, and the embodiment of the present invention is not limited;

Obtain the transformation block in the image block. The above transformation block refers to dividing the residual unit corresponding to the image block into one or more smaller residual units. The above residual unit refers to the residual after all prediction blocks are predicted according to different coding modes. . The transformation block is shown in Figure 1A-3 as two vertical rectangular transformation blocks; as shown in Figure 1A-3, the image block is divided into two transformation blocks, and the number of prediction blocks into which the transformation block is divided can be set arbitrarily. The embodiment of the invention is not limited;

All the boundaries of the above-mentioned prediction block and the above-mentioned transformation block constitute the boundary where DBF may be performed on the image block. Please compare Figure 1A-2 and Figure 1A-3, the dotted line shown in Figure 1A-4 is the boundary where DBF may be performed, and all the boundaries in Figure 1A-2 and Figure 1A-3 are the dotted line above.

Second, determine the BS value:

The embodiment of the present invention provides two alternative solutions for determining the BS value, please refer to FIG. 2 and FIG. 3 respectively.

Option A, see Figure 2:

For the convenience of description, it is assumed that the image block on the left side of the vertical boundary is P, and the image block on the right is Q; or the image block below the horizontal boundary is P, and the image block above is Q; then, in DBF, the boundary strength BS represents the The abruptness of P and Q on both sides of the border, the larger the value, the larger the drop of the border pixel value. BS is used to judge whether the boundary is filtered or not and the degree of filtering during filtering. Therefore, the determination of BS value is a very important link in DBF. The coding information of the image blocks on both sides of the boundary can reflect the size of the boundary drop. The above coding information includes coding mode information corresponding to the prediction block of the base layer (lower layer), may also include quantization coefficient identifiers, and may also include reference image information and motion vectors. The quantization coefficient flag indicates whether the image block has quantization coefficients. The above reference picture information includes a reference picture prediction direction and a reference picture index. The aforementioned reference picture prediction directions can be classified into forward prediction, backward prediction and bi-directional prediction. The aforementioned reference picture index indicates the position of the reference picture in the reference picture list. The motion vector above represents the motion offset of the current block relative to the co-located block in the reference image, and each motion vector includes a horizontal component x and a vertical component y. When the horizontal and vertical components of the motion vector have no offset relative to the same position block in the reference image, it is called static. The encoding mode of the above image block is the manner adopted by the image block during prediction, including Intra mode, BaseLayer mode and Inter mode. The above-mentioned Intra mode refers to a coding mode in which spatial adjacent pixels of the current image block are used for prediction. The above-mentioned BaseLayer mode refers to a coding mode for predicting by using the upsampled image at the same position of the base layer (lower layer). The aforementioned Inter mode refers to a coding mode in which prediction is performed using images in the time domain.

Compared with HEVC, the BaseLayer mode is added to the enhancement layer of SHVC. This mode is to upsample the image of the base layer (lower layer) and use the image unit at the same position as the reference unit for prediction. The Inter mode is based on time Image units in the domain are used as reference units for prediction. Compared with the reference unit formed by the Intra mode, the reference images of the BaseLayer mode and the Inter mode are closer to the natural acquisition image and have stronger predictive ability. Experiments have proved that the residuals of BaseLayer mode are more efficiently encoded according to the residuals of Inter mode. In short, from the formation of reference units and a large amount of experimental data, the predictive ability of the BaseLayer mode is close to that of the Inter mode. Therefore, in the BS decision-making process, the BaseLayer mode and the Inter mode are classified as one type of processing in the embodiment of the present invention. In addition, if the modes of the image blocks on both sides of the boundary are BaseLayer mode, and the quantization coefficients of both are 0 (that is, there is no quantization coefficient), it means that the prediction of the image blocks on both sides of the boundary comes from the base layer, and there is no quantization after prediction. The coefficients have a relatively large prediction similarity and are not likely to produce boundary effects. Therefore, in this case, the embodiment of the present invention does not perform filtering. Taking the image block as an example to describe the specific process of DBF, please refer to Figure 2, as follows:

This section is an introduction to BS calculations for possible filtered boundaries. For the convenience of description, define the image block on the left of the vertical boundary as P and the image block on the right as Q or the image block below the horizontal boundary as P and the image block above as Q. The BS is set as the first boundary strength, the second boundary strength and the third boundary strength corresponding to BS=0, BS=1 and BS=2 respectively. In this embodiment, no filtering is performed when BS=0. The assignment of the reference image of the image block whose encoding mode is the BaseLayer mode refers to specifying the index of the reference image of the image block in the BaseLayer mode. In this embodiment, the index of the reference image of the image block in the BaseLayer mode is designated as the index of the current image. Assigning static corresponding parameters to the motion vector of the image block whose encoding mode is BaseLayer mode refers to specifying the values of the horizontal motion component and the vertical motion component of the motion vector of the image block in BaseLayer mode as 0.

First, the encoding information of P and Q is obtained, including encoding mode, quantization flag, reference image and motion vector.

If at least one of P or Q is Intra mode, determine the BS value according to the prediction mode. This situation indicates that the residual error of P or Q may be large, and it is easy to produce a large boundary effect after the over-quantization operation, and BS is set to 2.

If neither P nor Q is an Intra mode coding mode, when at least one of P or Q has a coding mode of BaseLayer mode, determine the BS value according to the prediction mode, quantization coefficient and motion information. This situation indicates that both P and Q are in BaseLayer mode or one is in BaseLayer mode and the other is in Inter mode. When both P and Q are in BaseLayer mode and have no quantization coefficient (or 0 quantization coefficient), it indicates that P and Q have similar prediction sources and prediction effects, and are not easy to produce boundary effects, and BS is set to 0. When one is BaseLayer mode and the other is Inter mode, as mentioned above, the predictive ability of BaseLayer mode and Inter mode is equivalent and better than that of Intra mode, if both P and Q have no quantized coefficients and have the same reference image and For motion vectors with small differences, BS is set to 0; otherwise it is set to 1. The aforementioned motion vector with a small difference means that the absolute value of the x component and the y component of the motion vector is less than 4.

If both P and Q are in Inter mode, the BS value is mainly determined based on motion information and quantization coefficients. When P or Q has quantized coefficients, there may be weak boundary effects, set BS to 1. Otherwise, set BS to 1 if P and Q have different reference images. Or the absolute value of the x component (y component) of their motion vector is greater than or equal to 4, set BS to 1. Otherwise, when P and Q have no quantization coefficients, have the same reference image, and have motion vectors with small differences, boundary effects are not likely to occur, and BS is 0.

The following embodiments describe in detail the specific judgment process for realizing the above judgments. It should be noted that the order of specific execution of judgments can be adjusted, and does not necessarily follow the order shown in Figure 2. Take the scheme shown in Figure 2 as an example ,details as follows:

201: Determine whether P or Q (P or Q) is an intra-frame mode? That is: judge whether one of P or Q is Intra mode), if yes, go to 207, if not, go to 202;

202: Determine whether P or Q is the basic layer mode? That is: judge whether one of P or Q is BaseLayer mode, if yes, enter 203; if not, enter 204;

203: Judging that both P&Q are in the basic layer mode, and there is no quantization coefficient (or the quantization coefficient is 0)? That is: judge whether P and Q are both in BaseLayer mode and the quantization coefficient is 0; if yes, go to 209; if not, go to 210;

204: Determine whether P or Q has a non-zero quantization coefficient? That is: judge whether there is a non-zero quantization coefficient in P or Q, if yes, enter 208; if not, enter 205;

205: Judging that P&Q have different refs? That is: judge whether P and Q have different refs, if yes, go to 208; if not, go to 206;

The above ref is used to identify the reference image information (reference frame) when encoding the image block. The above reference image information includes the prediction direction of the reference image and the index number of the reference image. The above reference image directions include forward reference, backward reference and bidirectional reference. The aforementioned reference image index refers to the position of the reference image in the reference image list.

206: Determine whether |MV_Ph-MV_Qh|≥4or|MV_Pv-MV_Qv|≥4 is established? That is: judge whether the absolute value of the x component (or y component) of the motion vectors of P and Q is greater than or equal to 4; if yes, enter 208; if not, enter 209;

This step 206 is to determine whether the relative motion amplitude of adjacent image blocks is greater than or equal to a predetermined value in a predetermined direction; wherein, the adjacent image blocks are P and Q; the predetermined direction is the x-axis direction, that is, the horizontal direction, or the y-axis direction, That is, the vertical direction; the predetermined value is set to 4; it should be noted that the predetermined value can also be other values, such as a value close to 4 or other values, and technicians can fine-tune according to actual needs. The value is not limited.

207: Assignment operation: BS=2, then end.

208: Assignment operation: BS=1, then end.

209: Assignment operation: BS=0, then end.

210: Assign default values to ref and MV (Motion Vector, motion vector), and then go to 211; ref will be described in detail in subsequent embodiments.

211: Confirm whether P or Q has non-zero quantization coefficients, whether P&Q has different refs and P and Q motion vectors are similar; if yes, go to 209, otherwise go to 208.

Option B, see Figure 3:

Compared with HEVC, the BaseLayer mode is added to the enhancement layer of SHVC. This mode is to upsample the image of the base layer (lower layer) and use the image block at the same position as the reference unit for prediction. The Inter mode is based on time domain image blocks for prediction. Compared with the reference unit formed by the Intra mode, the reference images of the BaseLayer mode and the Inter mode are closer to the natural acquisition image and have stronger predictive ability. Experiments have proved that the residuals of BaseLayer mode are more efficiently encoded according to the residuals of Inter mode. In conclusion, from the formation of reference units and a large amount of experimental data, the prediction ability of the BaseLayer mode is close to that of the Inter mode. Therefore, in the BS decision-making process, the present invention classifies the BaseLayer mode and the Inter mode into one category.

The above-mentioned BaseLayer mode refers to a coding mode for predicting prediction block information by using an upsampled image at the same position on the base layer (lower layer). The aforementioned prediction block information includes texture information or mode information or motion information of a corresponding base layer (lower layer) prediction block.

In option B, the prediction ability of the BaseLayer mode and the prediction ability of the Inter mode are classified into one category when making BS decisions. The specific BS determination process is as follows:

This part is about the introduction of BS calculation on the boundaries of possible DBF. For the convenience of description, define the image block on the left of the vertical boundary as P and the image block on the right as Q or the image block below the horizontal boundary as P and the image block above as Q. Set the first boundary strength, second boundary strength and third boundary strength to correspond to BS=0, BS=1, BS=2 respectively. In this embodiment, no filtering is performed when BS=0. Assigning a value to a reference image of an image block whose encoding mode is the BaseLayer mode refers to assigning a prediction direction and an index to a reference image of an image block in the BaseLayer mode. In this embodiment, the reference direction of the image block in the BaseLayer mode is designated as forward reference, and the reference image index is the index corresponding to the first reference frame of the current image forward reference. Assigning static corresponding parameters to the motion vector of the image block whose encoding mode is BaseLayer mode refers to specifying the values of the horizontal motion component and the vertical motion component of the motion vector of the image block in BaseLayer mode as 0. It should be noted that the above assigned values may also be other values, and the present invention does not limit the specific values.

First, the encoding information of P and Q is obtained, including encoding mode, quantization flag, reference image and motion vector.

If the encoding mode of at least one of P or Q is Intra mode, determine the BS value according to the prediction mode. This situation indicates that the residual error of P or Q may be large, and it is easy to produce a large boundary effect after the over-quantization operation, and BS is set to 2.

If the encoding mode of at least one of P or Q is the BaseLayer mode, the ref and MV (Motion Vector, motion vector) of P or Q whose encoding mode is the BaseLayer mode are assigned default values. The specific assignment may be: Ref is set to the first reference frame of the forward reference, the horizontal motion component of MV is set to 0, and the vertical motion component is set to 0.

Next, determine the BS value according to the motion information and the quantization coefficient, as follows:

When P or Q has quantized coefficients, there may be weak boundary effects, set BS to 1.

Otherwise, if P or Q is predicted according to different reference images, it is easy to generate boundaries, set BS to 1. Otherwise, if the absolute value of the x component (y component) of the P and Q motion vectors is greater than or equal to 4, the motion vectors in the same reference image are quite different, and boundary effects are likely to occur, so set BS to 1. Otherwise, when P and Q have no quantization coefficients, have the same reference image, and have motion vectors with small differences, boundary effects are not easy to occur, and BS is set to 0.

The following embodiments describe in detail the specific judgment process for realizing the above judgments. It should be noted that the order of specific execution of judgments can be adjusted, and does not necessarily follow the order shown in Figure 3. Take the scheme shown in Figure 3 as an example ,details as follows:

301: Determine whether P or Q (P or Q) is an intra-frame mode? That is: judge whether one of P or Q is Intra mode), if yes, enter 307, if not, enter 302;

302: Determine whether P or Q is the basic layer mode? That is: judge whether one of P or Q is BaseLayer mode, if yes, enter 303; if not, enter 304;

303: Assign default values to ref and MV (MotionVector, motion vector) of P or Q whose encoding mode is BaseLayer mode. The specific assignment can be: Ref is set to the first reference frame of the forward reference, the horizontal motion component of MV is set to 0 (setting to 0 can be used to indicate no motion or stillness), the vertical motion component is set to 0, and then enter 304;

304: Determine whether P or Q has a non-zero quantization coefficient? That is: judge whether there is a non-zero quantization coefficient in P or Q, if yes, enter 308; if not, enter 305;

305: Judging that P&Q have different refs? That is: judge whether P and Q have different refs, if yes, go to 308; if not, go to 306;

The above ref is used to identify the reference image information (reference frame) when encoding the image block. The above reference image information includes the direction of the reference image and the reference image label. The above reference image directions include forward reference, backward reference and bidirectional reference. The above index of the reference picture refers to the position of the reference picture in the reference picture list. In the subsequent embodiments, how to obtain it will be described in more detail.

306: Determine whether |MV_Ph-MV_Qh|≥4or|MV_Pv-MV_Qv|≥4 is established? That is: determine whether the absolute value of the x component (or y component) of the motion vectors of P and Q is greater than or equal to 4; if yes, enter 308; if not, enter 309;

This step 306 is to determine whether the relative motion amplitude of adjacent image blocks is greater than or equal to a predetermined value in a predetermined direction; wherein, the adjacent image blocks are P and Q; the predetermined direction is the x-axis direction, that is, the horizontal direction, or the y-axis direction, That is, the vertical direction; the predetermined value is set to 4; it should be noted that the predetermined value can also be other values, such as a value close to 4 or other values, and technicians can fine-tune according to actual needs. The value is not limited.

307: Assignment operation: BS=2, then end.

308: Assignment operation: BS=1, then end.

309: Assignment operation: BS=0, then end.

3. Judgment of filtering strength:

The problem solved by this solution is to judge whether the boundary is filtered and the strength of the filter. Specifically: according to the QP values of P and Q, the average QP value Ag_QP is obtained. The calculation formula of Ag_QP is as follows: Avg_QP=((QP _p +QP _q +1) >>1), wherein, ">>" is a right shift operator, QP _p is a quantization parameter of P block, and QP _q is a quantization parameter of Q block. According to Avg_QP and BS value, read threshold β and threshold t _c . Among them, β and t _c are a set of specific numbers derived from Avg_QP and BS. As shown in Figure 4, in the decision process, first obtain the pixel gradient dpi (i=0,3) and dqi(i=0,3) in the dotted line box on both sides of the possible filtering boundary, specifically dp0=|P _2,0 –2*P _1,0 +P _0,0 |,dp3=|P _2,3 –2*P _1,3 +P _0,3 |,dq0=|q _2,0 –2*q _1,0 + q _0,0 |, dq3=q _2,3 -2*q _1,3 +q _0,3 |. According to the relationship between dpi, dqi, β and _tc , it is decided whether to perform filtering, and if it is filtered, it is decided whether to use a strong filter or a weak filter. After the filter intensity is determined, the corresponding filter is called to filter the three rows of pixels on both sides of the boundary to achieve the purpose of smoothing the boundary.

In the above embodiments, the threshold β is based on a group of Avg_QP corresponding to a set of preset specific values, and different Avg_QP values correspond to a β value respectively. The determined Avg_QP corresponds to the determined β value, and according to the relationship between the β value and the gradient of the boundary pixel, it is determined whether to filter the boundary between P and Q.

In the above embodiments, the threshold _tc is based on a group of Avg_QP corresponding to a set of preset specific values, and different Avg_QP values correspond to a _tc value respectively. When the BS value is less than or equal to 1, the corresponding determined t _c value is obtained according to the determined Avg_QP, and when the BS is greater than 1, the corresponding determined t _c value is obtained according to the determined (Avg_QP+2) value. When the corresponding β value and t _c are obtained under the determined Avg_QP and BS, judge whether to use strong filtering or weak filtering at the P and Q boundaries according to the relationship between the β value and t _c value and the gradient of the boundary pixel.

Embodiments of the present invention This invention makes full use of the encoding mode, motion information and quantization coefficients of the image block, and changes the determination process of the BS value in the DBF. In the embodiment of the present invention, the filtering intensity of the BaseLayer mode image block is consistent with that of the Inter mode image block. When the image blocks on both sides of the boundary adopt the BaseLayer mode and have no quantization coefficients, no filtering is performed, and the BS value setting is more reasonable, reducing the cost of the codec. is the computational complexity of the decoder, improving the coding efficiency.

An embodiment of the present invention provides a boundary strength BS determining device, as shown in FIG. 5, including:

The first boundary determining unit 501 is configured to determine a possible filtering boundary of the deblocking filter DBF;

The first information acquiring unit 502 is configured to acquire the encoding mode and encoding information of the adjacent image blocks on both sides of the possible filtering boundary determined by the above-mentioned first boundary determining unit 501;

The first BS determination unit 503 is configured to: when the encoding modes of the adjacent image blocks acquired by the first information acquiring unit 502 are not Intra mode, and the encoding modes of the adjacent image blocks include at least one basic layer In the BaseLayer mode, set the boundary strength BS of the above-mentioned possible filtering boundary to different boundary strength values according to the above-mentioned coding information.

In the embodiment of the present invention, when the encoding modes of adjacent image blocks are not Intra mode, and the encoding modes of adjacent image blocks include at least one BaseLayer mode, the boundary strength values of the possible filtering boundaries BS different boundary strength values , the BS settings are no longer all set to the same strength, which makes the BS settings more reasonable, thereby improving the coding efficiency.

Further, the above-mentioned first information obtaining unit 502 is specifically configured to obtain quantization coefficient identifiers of whether the adjacent image blocks on both sides of the possible filtering boundary determined by the above-mentioned first boundary determination unit 501 have quantization coefficients;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value, and the above-mentioned first BS determining unit 503 is specifically configured to If the encoding modes of the blocks are all BaseLayer modes and the quantization coefficient identifier indicates that none of the adjacent image blocks have quantization coefficients, then the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

Further, as shown in FIG. 6, the above-mentioned first information obtaining unit 502 is specifically configured to obtain the quantization coefficient identifier indicating whether the above-mentioned adjacent image block has a quantization coefficient included in the above-mentioned encoding information, and the above-mentioned adjacent image block a reference image, and motion vectors of the aforementioned adjacent image blocks;

The above-mentioned first BS determination unit 503 includes: a first parameter setting unit 601, a first parameter acquisition unit 602, and a first BS determination subunit 603;

The above-mentioned first parameter setting unit 601 is configured to set the reference image of the above-mentioned image block whose encoding mode is BaseLayer mode according to preset rules and set the motion vector of the above-mentioned image block whose encoding mode is BaseLayer mode to be relative to the same reference image in the reference image. The corresponding parameters when the position block is stationary;

The above-mentioned first parameter obtaining unit 602 is configured to obtain the quantization coefficient identification of the adjacent image blocks on both sides of the possible filtering boundary determined by the above-mentioned first boundary determining unit 501, the reference image of the above-mentioned adjacent image blocks, and the above-mentioned adjacent The motion vector of the image block;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; the above-mentioned first BS determination subunit 603 is configured to if the above-mentioned quantization coefficient identification Indicates that none of the above-mentioned adjacent image blocks have quantization coefficients, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is smaller than the preset threshold, then the above-mentioned possible filtering boundary The boundary strength BS is set to the first boundary strength.

Further, the first BS determining subunit 603 is further configured to: if the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different reference image, or the difference between the above-mentioned adjacent image block motion vectors is greater than or equal to a preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set as the second boundary strength.

Further, the above-mentioned first information obtaining unit 502 is also used to obtain whether the adjacent image blocks on both sides of the possible filtering boundary determined by the above-mentioned first boundary determining unit 501 have quantization coefficient identifiers of quantization coefficients;

The above first BS determination unit 503 is specifically configured to set the boundary strength BS of the above possible filtering boundary as the second boundary if the above quantization coefficient identifier indicates that at least one of the above image blocks among the above adjacent image blocks has a quantization coefficient strength.

Further, the above-mentioned first information obtaining unit 502 is specifically configured to set the reference image of the above-mentioned image block whose encoding mode is BaseLayer mode according to preset rules; obtain the reference image of the adjacent image block on both sides of the above-mentioned possible filtering boundary;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; the above-mentioned first BS determination unit 503 is specifically configured to if Indicating that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have different reference images, then the boundary strength BS of the possible filtering boundary is set as the second boundary strength.

Further, as shown in FIG. 7, the above-mentioned first information obtaining unit 502 is further configured to obtain the motion vectors of the above-mentioned adjacent image blocks included in the above-mentioned encoding information;

The first BS determination unit 503 includes: a second parameter setting unit 701, a second parameter acquisition unit 702, and a second BS determination subunit 703;

The second parameter setting unit 701 is configured to set the motion vector of the image block whose encoding mode is BaseLayer mode as a parameter corresponding to when the block at the same position in the reference image is still;

The second parameter acquisition unit 702 is configured to acquire motion vectors of adjacent image blocks on both sides of the possible filtering boundary;

The second BS determining subunit 703 is configured to: if the quantization coefficient flag indicates that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have the same reference image, and the motion vector of the adjacent image blocks If the difference between them is greater than or equal to the preset threshold, then the boundary strength BS of the above possible filtering boundary is set as the second boundary strength.

Further, the second BS determining subunit 703 is further configured to: if the quantization coefficient identifier indicates that there is no quantization coefficient in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the adjacent The difference between the motion vectors of the image blocks is smaller than the preset threshold, then the boundary strength BS of the above possible filtering boundary is set as the first boundary strength.

The embodiment of the present invention also provides a filtering device for deblocking effect, as shown in FIG. 8 , including:

The second boundary determining unit 801 is configured to determine a possible filtering boundary of the deblocking filter DBF;

The second information acquiring unit 802 is configured to acquire the encoding mode and encoding information of the adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determining unit 801;

The second BS determining unit 803 is configured to be used when the encoding modes of the adjacent image blocks acquired by the second information acquiring unit 802 are not Intra mode, and the encoding modes of the adjacent image blocks include at least one basic layer BaseLayer mode, set the boundary strength BS of the above possible filtering boundary to different boundary strength values according to the above encoding information;

The threshold acquisition unit 804 is configured to use the determined boundary strength BS value as a reference factor to acquire a first threshold and a second threshold, the first threshold is used to determine whether to filter the possible filtering boundaries, and the second threshold The threshold is used to determine the filtering strength for filtering the above-mentioned possible filtering boundaries that need to be filtered;

The filtering decision unit 805 is configured to determine whether the above-mentioned possible filtering boundary needs to be determined according to the gradient of pixels within a predetermined range in the adjacent image blocks on both sides of the possible filtering boundary determined by the above-mentioned second boundary determining unit 801 and the above-mentioned first threshold. filtering;

The filter control unit 806 is configured to, if the filtering decision unit 805 determines that filtering is required, determine the filter for performing filtering according to the relationship between the gradient of pixels within a predetermined range and the second threshold in adjacent image blocks on both sides of the possible filtering boundary, And use the determined filter to perform filtering processing on the above-mentioned possible filtering boundaries that need to be filtered.

Further, the second information acquiring unit 802 is specifically configured to acquire whether the adjacent image blocks on both sides of the possible filtering boundary determined by the above-mentioned second boundary determining unit 801 have quantization coefficient identifiers of quantization coefficients;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; the above-mentioned second BS determination unit 803 is specifically configured to if the above-mentioned adjacent image If the encoding modes of the blocks are all BaseLayer modes and the quantization coefficient identifier indicates that none of the adjacent image blocks have quantization coefficients, then the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

Further, as shown in FIG. 9, the above-mentioned second information obtaining unit 802 is specifically configured to obtain the quantization coefficient identifier indicating whether the above-mentioned adjacent image block has a quantization coefficient included in the above-mentioned encoding information, and the above-mentioned adjacent image block a reference image, and motion vectors of the aforementioned adjacent image blocks;

The second BS determination unit 803 includes: a third parameter setting unit 901, a third parameter acquisition unit 902, and a third BS determination subunit 903;

The above-mentioned third parameter setting unit 901 is configured to set the reference image of the above-mentioned image block whose encoding mode is BaseLayer mode according to preset rules and set the motion vector of the above-mentioned image block whose encoding mode is BaseLayer mode to be relative to the same in the reference image. The corresponding parameters when the position block is stationary;

The above-mentioned third parameter obtaining unit 902 is configured to obtain the quantization coefficient identification of the adjacent image blocks on both sides of the possible filtering boundary determined by the above-mentioned second boundary determining unit 801, the reference image of the above-mentioned adjacent image blocks, and the above-mentioned adjacent The motion vector of the image block;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; the above-mentioned third BS determination subunit 903 is configured to if the above-mentioned quantization coefficient identification Indicates that none of the above-mentioned adjacent image blocks have quantization coefficients, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is smaller than the preset threshold, then the above-mentioned possible filtering boundary The boundary strength BS is set to the first boundary strength.

Further, the third BS determining subunit 903 is further configured to if the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different reference image, or the difference between the above-mentioned adjacent image block motion vectors is greater than or equal to a preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set as the second boundary strength.

Further, the above-mentioned second information obtaining unit 802 is specifically configured to obtain whether the adjacent image blocks on both sides of the possible filtering boundary determined by the above-mentioned second boundary determining unit 801 have quantization coefficient identifiers of quantization coefficients;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; the above-mentioned second BS determining unit 803 is specifically configured to if the above-mentioned quantization coefficient identification Indicating that at least one of the adjacent image blocks has a quantization coefficient, then setting the boundary strength BS of the possible filtering boundary as the second boundary strength.

Further, the above-mentioned second information obtaining unit 802 is also used to set the reference image of the above-mentioned image block whose encoding mode is BaseLayer mode according to the preset rule; obtain the reference image of the adjacent image block on both sides of the above-mentioned possible filtering boundary;

The second BS determination unit 803 is further configured to set the boundaries of the possible filtering boundaries to The strength BS is set to the second boundary strength.

Further, as shown in FIG. 10, the above-mentioned first information obtaining unit is further configured to obtain the motion vector of the above-mentioned adjacent image block included in the above-mentioned encoding information;

The second BS determination unit 803 includes: a fourth parameter setting unit 1001, a fourth parameter acquisition unit 1002, and a fourth BS determination subunit 1003;

The above-mentioned fourth parameter setting unit 1001 is configured to set the motion vector of the above-mentioned image block whose encoding mode is BaseLayer mode as a parameter corresponding to when the block at the same position in the reference image is still;

The fourth parameter acquisition unit 1002 is configured to acquire motion vectors of adjacent image blocks on both sides of the possible filtering boundary;

The fourth BS determining subunit 1003 is configured to: if the quantization coefficient flag indicates that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have the same reference image, and the motion vector of the adjacent image blocks If the difference between them is greater than or equal to the preset threshold, then the boundary strength BS of the above possible filtering boundary is set as the second boundary strength.

Further, the fourth BS determination subunit 1003 is further configured to if the quantization coefficient identifier indicates that there is no quantization coefficient in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the adjacent The difference between the motion vectors of the image blocks is smaller than the preset threshold, then the boundary strength BS of the above possible filtering boundary is set as the first boundary strength.

The embodiment of the present invention also provides another boundary strength BS determination device, as shown in FIG. 11 , including: a receiving device 1101, a sending device 1102, a processor 1104, and a storage device 1103;

Wherein, the above-mentioned processor 1104 is configured to determine a possible filtering boundary of the deblocking filter DBF;

Obtain the coding mode and coding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

When the encoding modes of the above-mentioned adjacent image blocks are not Intra mode, and the encoding modes of the above-mentioned adjacent image blocks include at least one base layer BaseLayer mode, then according to the above-mentioned encoding information, the boundary strength of the above-mentioned possible filtering boundary BS is set to different boundary strength values.

Further, if the above-mentioned encoding information includes a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient;

Correspondingly, the above-mentioned processor 1104 is used to obtain the encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1104 is used to obtain whether the adjacent image blocks on both sides of the above-mentioned possible filtering boundary have quantization coefficients logo;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1104 is configured to convert the above-mentioned possible Setting the boundary strength of the filtering boundary to different boundary strength values includes: if the encoding modes of the above-mentioned adjacent image blocks are both BaseLayer mode and the quantization coefficient identifier indicates that the above-mentioned adjacent image blocks have no quantization coefficients, then the above-mentioned possible The boundary strength BS of the filter boundary is set to the first boundary strength.

Further, if the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and a motion vector of the adjacent image block;

Correspondingly, the above-mentioned processor 1104 is specifically used to obtain the encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1104 is also used to set the encoding mode as the reference of the above-mentioned image blocks in the BaseLayer mode according to preset rules. Image and the motion vector of the above-mentioned image block whose encoding mode is BaseLayer mode is set as the parameter corresponding to when the block at the same position in the reference image is still;

Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the above-mentioned possible filtering boundary, reference images of the above-mentioned adjacent image blocks, and motion vectors of the above-mentioned adjacent image blocks;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1104 is configured to convert the above-mentioned possible Filtering different boundary strength values of the boundary strength BS of the boundary; the above-mentioned processor 1104 is specifically configured to if the above-mentioned quantization coefficient identifier indicates that the above-mentioned adjacent image blocks have no quantization coefficients, and the above-mentioned adjacent image blocks have the same reference image, And the difference between the motion vectors of the adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

Further, correspondingly, the above-mentioned processor 1104 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strength values according to the above-mentioned coding information; At least one of the aforementioned image blocks in the block has a quantization coefficient, or the aforementioned adjacent image blocks have different reference images, or the difference between the aforementioned adjacent image block motion vectors is greater than or equal to the preset threshold, then the aforementioned possible The boundary strength BS of the filtered boundary is set to the second boundary strength.

Further, if the above-mentioned encoding information includes a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient;

Correspondingly, the above-mentioned processor 1104 is used to obtain the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1104 is also used to obtain whether the adjacent image blocks on both sides of the above-mentioned possible filtering boundary have quantization coefficients Quantization coefficient identification;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1104 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the processor 1104 is specifically configured to set the possible filtering boundary The boundary strength BS is set to the second boundary strength.

Further, if the above encoding information also includes reference images of the above adjacent image blocks:

Correspondingly, the processor 1104 is used to obtain the encoding information of the adjacent image blocks on both sides of the possible filtering boundary; the processor 1104 is also used to set the reference image of the image block whose encoding mode is BaseLayer mode according to the preset rules ; Obtain reference images of adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned processor 1104 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strength values according to the above-mentioned encoding information; quantization coefficients, and the above-mentioned adjacent image blocks have different reference images, then the boundary strength BS of the above-mentioned possible filtering boundary is set as the second boundary strength.

Further, if the above coding information also includes the motion vector of the above adjacent image block;

Correspondingly, the above-mentioned processor 1104 is used to obtain the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1104 is also used to set the motion vector of the above-mentioned image block whose coding mode is BaseLayer mode to be relative to The parameters corresponding to when the block at the same position in the reference image is still; obtaining the motion vectors of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned processor 1104 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strengths BS according to the above-mentioned encoding information; quantized coefficients, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is greater than or equal to the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set to Second boundary strength.

Further, correspondingly, the above-mentioned processor 1104 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strength values according to the above-mentioned coding information; There is no quantization coefficient in any block, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is Set to the first boundary strength.

The embodiment of the present invention also provides a deblocking filter device, as shown in FIG. 12 , including: a receiving device 1201, a sending device 1202, a processor 1204, and a storage device 1203;

Wherein, the processor 1204 is configured to determine possible filtering boundaries of the deblocking filter DBF;

Obtain the coding mode and coding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

When the encoding modes of the above-mentioned adjacent image blocks are not Intra mode, and the encoding modes of the above-mentioned adjacent image blocks include at least one base layer BaseLayer mode, then according to the above-mentioned encoding information, the boundary strength of the above-mentioned possible filtering boundary BS set to different border strength values;

The above-mentioned determined boundary strength BS value is used as a reference factor to obtain the first threshold and the second threshold, the above-mentioned first threshold is used to determine whether to filter the above-mentioned possible filtering boundary, and the above-mentioned second threshold is used to determine the need to filter The filtering strength of the above-mentioned possible filtering boundaries for filtering;

Determine whether the above-mentioned possible filtering boundary needs to be filtered according to the gradient of pixels within a predetermined range in adjacent image blocks on both sides of the above-mentioned possible filtering boundary and the above-mentioned first threshold;

If it is determined that filtering is required, the filter for performing filtering is determined according to the relationship between the gradient of pixels within a predetermined range and the second threshold value in adjacent image blocks on both sides of the possible filtering boundary, and the determined filter is instructed to perform filtering for the above-mentioned needs The above possible filtering boundaries are filtered.

Further, if the above-mentioned encoding information includes a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient;

Correspondingly, the above-mentioned processor 1204 is used to obtain the encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1204 is also used to obtain whether the adjacent image blocks on both sides of the above-mentioned possible filtering boundary have quantization coefficient coefficient identification;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1204 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the above-mentioned processor 1204 is specifically configured to if the encoding modes of the above-mentioned adjacent image blocks are all BaseLayer modes and the quantization coefficient identifier indicates that the above-mentioned adjacent image blocks have no quantization coefficients, then The boundary strength BS of the aforementioned possible filter boundaries is set as the first boundary strength.

Further, if the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and a motion vector of the adjacent image block;

Correspondingly, the above-mentioned processor 1204 is used to obtain the coding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1204 is specifically configured to set the coding mode as the reference image of the above-mentioned image block in the BaseLayer mode according to the preset rules and The motion vector of the above-mentioned image block whose above-mentioned encoding mode is BaseLayer mode is set as the parameter corresponding to when the block at the same position in the reference image is stationary;

Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the above-mentioned possible filtering boundary, reference images of the above-mentioned adjacent image blocks, and motion vectors of the above-mentioned adjacent image blocks;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1204 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the above-mentioned processor 1204 is specifically configured to if the above-mentioned quantization coefficient identifier indicates that the above-mentioned adjacent image blocks have no quantization coefficients, and the above-mentioned adjacent image blocks have the same reference image, And the difference between the motion vectors of the adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

Further, corresponding to the above-mentioned processor 1204, which is used to set the boundary strength values of the above-mentioned possible filtering boundaries according to the above-mentioned encoding information; At least one of the above-mentioned image blocks has a quantization coefficient, or the above-mentioned adjacent image blocks have different reference images, or the difference between the motion vectors of the above-mentioned adjacent image blocks is greater than or equal to the preset threshold, then the above-mentioned possible filtering The border strength BS of the border is set to the second border strength.

Further, if the above-mentioned encoding information includes a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient;

Correspondingly, the above-mentioned processor 1204 is used to obtain the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1204 is specifically used to obtain whether the adjacent image blocks on both sides of the above-mentioned possible filtering boundary have quantization coefficients Quantization coefficient identification;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1204 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the processor 1204 is specifically configured to: if the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, the above possible filtering boundary The boundary strength BS is set to the second boundary strength.

Further, if the above encoding information also includes reference images of the above adjacent image blocks:

Correspondingly, the above-mentioned processor 1204 is used to obtain the encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1204 is also used to set the reference image of the above-mentioned image block whose encoding mode is BaseLayer mode according to the preset rules ; Obtain reference images of adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned processor 1204 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strengths BS according to the above-mentioned encoding information; quantization coefficients, and the above-mentioned adjacent image blocks have different reference images, then the boundary strength BS of the above-mentioned possible filtering boundary is set as the second boundary strength.

Further, if the above coding information also includes the motion vector of the above adjacent image block;

Correspondingly, the above-mentioned processor 1204 is used to acquire the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1204 is also used to set the motion vector of the above-mentioned image block whose coding mode is BaseLayer The parameters corresponding to when the block at the same position in the reference image is still; obtaining the motion vectors of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned processor 1204 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strengths BS according to the above-mentioned encoding information; quantized coefficients, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is greater than or equal to the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set to Second boundary strength.

Further, corresponding to the above-mentioned processor 1204, which is used to set the boundary strength values of the above-mentioned possible filtering boundaries according to the above-mentioned encoding information; There are no quantization coefficients in the above-mentioned adjacent image blocks, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set to is the first boundary strength.

Figure 13 shows the structure of the boundary strength BS determination device or the deblocking filter device provided by the embodiment of the present invention, and the structure of the terminal is taken as an example, the terminal provided by the implementation of the present invention can be used to implement the method provided by the implementation of the present invention , for ease of description, only the parts related to the embodiments of the present invention are shown, and for specific technical details not disclosed, please refer to the method part of the embodiments of the present invention.

The terminal can be a terminal device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales, a sales terminal), a vehicle-mounted computer, etc. Taking the terminal as a mobile phone as an example, FIG. 13 shows A block diagram of a partial structure of the mobile phone 1300 related to the terminal provided by the embodiment of the present invention. Referring to FIG. 13 , the mobile phone 1300 includes an RF (Radio Frequency, radio frequency) circuit 1310, a memory 1320, an input unit 1330, a display unit 1340, a sensor 1350, an audio circuit 1360, a WiFi (wirelessdelity, wireless fidelity) module 1370, a processor 1380, And power supply 1390 and other components. Those skilled in the art can understand that the structure of the mobile phone shown in FIG. 13 does not constitute a limitation to the mobile phone, and may include more or less components than shown in the figure, or combine some components, or arrange different components.

The components of the mobile phone 1300 are specifically introduced below in conjunction with FIG. 13 :

The RF circuit 1310 can be used for sending and receiving information or receiving and sending signals during a call. In particular, after receiving the downlink information from the base station, it is processed by the processor 1380; in addition, the designed uplink data is sent to the base station. Generally, the RF circuit includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, an LNA (Low Noise Amplifier, low noise amplifier), a duplexer, and the like. In addition, RF circuitry 1310 may also communicate with networks and other devices via wireless communications. The above wireless communication can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication, Global System for Mobile Communication), GPRS (General Packet Radio Service, general packet radio service), CDMA (Code Division Multiple Access, code division Multiple access), WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access), LTE (LongTerm Evolution, long-term evolution), email, SMS (Short Messaging Service, short message service), etc.

The memory 1320 can be used to store software programs and modules, and the processor 1380 executes various functional applications and data processing of the mobile phone 1300 by running the software programs and modules stored in the memory 1320 . Memory 1320 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, at least one application program required by a function (such as a sound playback function, an image playback function, etc.); The data created by the use of the mobile phone 1300 (such as audio data, phone book, etc.) and the like. In addition, the memory 1320 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The input unit 1330 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the mobile phone 1300 . Specifically, the input unit 1330 may include a touch panel 1331 and other input devices 1332 . The touch panel 1331, also referred to as a touch screen, can collect touch operations of the user on or near it (for example, the user uses any suitable object or accessory such as a finger or a stylus on the touch panel 1331 or near the touch panel 1331). operation), and drive the corresponding connection device according to the preset program. Optionally, the touch panel 1331 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and sends it to the to the processor 1380, and can receive and execute commands sent by the processor 1380. In addition, the touch panel 1331 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1331 , the input unit 1330 may also include other input devices 1332 . Specifically, other input devices 1332 may include but not limited to one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), trackball, mouse, joystick, and the like.

The display unit 1340 may be used to display information input by or provided to the user and various menus of the mobile phone 1300 . The display unit 1340 may include a display panel 1341. Optionally, the display panel 1341 may be configured in the form of LCD (Liquid Crystal Display, liquid crystal display), OLED (Organic Light-Emitting Diode, organic light-emitting diode), and the like. Furthermore, the touch panel 1331 can cover the display panel 1341, and when the touch panel 1331 detects a touch operation on or near it, it sends it to the processor 1380 to determine the type of the touch event, and then the processor 1380 determines the type of the touch event according to the The type provides a corresponding visual output on the display panel 1341 . Although in FIG. 13, the touch panel 1331 and the display panel 1341 are used as two independent components to realize the input and input functions of the mobile phone 1300, in some embodiments, the touch panel 1331 and the display panel 1341 can be integrated. And the input and output functions of the mobile phone 1300 are realized.

Cell phone 1300 may also include at least one sensor 1350, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor can include an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 1341 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1341 and the display panel 1341 when the mobile phone 1300 is moved to the ear. / or backlighting. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when it is stationary, and can be used for applications that recognize the posture of mobile phones (such as horizontal and vertical screen switching, related Games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tap), etc.; as for other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc. Let me repeat.

The audio circuit 1360 , the speaker 1361 and the microphone 1362 can provide an audio interface between the user and the mobile phone 1300 . The audio circuit 1360 can transmit the electrical signal converted from the received audio data to the speaker 1361, and the speaker 1361 converts it into an audio signal for output; After being received, it is converted into audio data, and then the audio data is processed by the output processor 1380, and then sent to another mobile phone through the RF circuit 1310, or the audio data is output to the memory 1320 for further processing.

WiFi is a short-distance wireless transmission technology. The mobile phone 1300 can help users send and receive emails, browse web pages, and access streaming media through the WiFi module 1370, which provides users with wireless broadband Internet access. Although FIG. 13 shows a WiFi module 1370, it can be understood that it is not an essential component of the mobile phone 1300, and can be completely omitted as required without changing the essence of the invention.

The processor 1380 is the control center of the mobile phone 1300, using various interfaces and lines to connect various parts of the entire mobile phone, by running or executing software programs and/or modules stored in the memory 1320, and calling data stored in the memory 1320, Execute various functions and process data of the mobile phone 1300, so as to monitor the mobile phone as a whole. Optionally, the processor 1380 may include one or more processing units; preferably, the processor 1380 may integrate an application processor and a modem processor, wherein the application processor mainly processes operating systems, user interfaces, and application programs, etc. , the modem processor mainly handles wireless communications. It can be understood that the foregoing modem processor may not be integrated into the processor 1380 .

The mobile phone 1300 also includes a power supply 1390 (such as a battery) for supplying power to various components. Preferably, the power supply can be logically connected to the processor 1380 through a power management system, so that functions such as charging, discharging, and power consumption management can be realized through the power management system.

Although not shown, the mobile phone 1300 may also include a camera, a Bluetooth module, etc., which will not be repeated here.

In the embodiment of the present invention, the processor 1380 included in the terminal also has the following functions:

The above-mentioned processor 1304 is configured to determine a possible filtering boundary of the deblocking filter DBF;

Obtain the coding mode and coding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

When the encoding modes of the above-mentioned adjacent image blocks are not Intra mode, and the encoding modes of the above-mentioned adjacent image blocks include at least one base layer BaseLayer mode, then according to the above-mentioned encoding information, the boundary strength of the above-mentioned possible filtering boundary BS is set to different boundary strength values.

Further, if the above-mentioned encoding information includes a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient;

Correspondingly, the above-mentioned processor 1304 is used to obtain the encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is specifically used to obtain the quantization coefficient coefficient identification;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value. Correspondingly, the above-mentioned processor 1304 is configured to convert the above-mentioned possible The different boundary strength values of the boundary strength BS of the filtering boundary include: if the encoding modes of the above-mentioned adjacent image blocks are both BaseLayer mode and the quantization coefficient identifier indicates that the above-mentioned adjacent image blocks have no quantization coefficients, then the above-mentioned possible The boundary strength BS of the filtered boundary is set to the first boundary strength.

Further, if the encoding information includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and a motion vector of the adjacent image block;

Correspondingly, the above-mentioned processor 1304 is used to acquire the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is specifically used to set the coding mode to the reference image of the above-mentioned image block in BaseLayer mode according to preset rules And the motion vector of the above-mentioned image block of the above-mentioned encoding mode being BaseLayer mode is set as the parameter corresponding to when the block at the same position in the reference image is stationary;

Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the above-mentioned possible filtering boundary, reference images of the above-mentioned adjacent image blocks, and motion vectors of the above-mentioned adjacent image blocks;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value. Correspondingly, the above-mentioned processor 1304 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the above-mentioned processor 1304 is specifically configured to if the above-mentioned quantization coefficient identifier indicates that the above-mentioned adjacent image blocks have no quantization coefficients, and the above-mentioned adjacent image blocks have the same reference image, And the difference between the motion vectors of the adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

Further, correspondingly, the above-mentioned processor 1304 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strength values according to the above-mentioned encoding information; At least one of the aforementioned image blocks in the block has a quantization coefficient, or the aforementioned adjacent image blocks have different reference images, or the difference between the aforementioned adjacent image block motion vectors is greater than or equal to the preset threshold, then the aforementioned possible The boundary strength BS of the filtered boundary is set to the second boundary strength.

Further, if the above-mentioned encoding information includes a quantization coefficient identifier marking whether the above-mentioned adjacent image block has a quantization coefficient;

Correspondingly, the above-mentioned processor 1304 is used to obtain the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is specifically used to obtain whether the adjacent image blocks on both sides of the above-mentioned possible filtering boundary have quantization coefficients Quantization coefficient identification;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1304 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the processor 1304 is specifically configured to set the possible filtering boundary The boundary strength BS is set to the second boundary strength.

Further, if the above encoding information also includes reference images of the above adjacent image blocks:

Correspondingly, the above-mentioned processor 1304 is used to acquire the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is also used to set the coding mode as the reference image of the above-mentioned image block in BaseLayer mode according to the preset rules ; Obtain reference images of adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned processor 1304 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strengths BS according to the above-mentioned encoding information; quantization coefficients, and the above-mentioned adjacent image blocks have different reference images, then the boundary strength BS of the above-mentioned possible filtering boundary is set as the second boundary strength.

Further, if the above coding information also includes the motion vector of the above adjacent image block;

Correspondingly, the above-mentioned processor 1304 is used to obtain the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is also used to set the motion vector of the above-mentioned image block whose coding mode is BaseLayer mode to be relative to The parameters corresponding to when the block at the same position in the reference image is still; obtaining the motion vectors of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned processor 1304 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strength values according to the above-mentioned coding information; There is no quantization coefficient, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the above-mentioned adjacent image block motion vectors is greater than or equal to the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set to is the second boundary strength.

Further, correspondingly, the above-mentioned processor 1304 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strength values according to the above-mentioned encoding information; There is no quantization coefficient in any block, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is Set to the first boundary strength.

If the above-mentioned mobile phone is used as a filtering device for deblocking, in the embodiment of the present invention, the processor 1380 included in the terminal also has the following functions:

The above-mentioned processor 1304 is configured to determine a possible filtering boundary of the deblocking filter DBF;

Obtain the coding mode and coding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

When the encoding modes of the above-mentioned adjacent image blocks are not Intra mode, and the encoding modes of the above-mentioned adjacent image blocks include at least one base layer BaseLayer mode, then according to the above-mentioned encoding information, the boundary strength of the above-mentioned possible filtering boundary BS set to different border strength values;

The above-mentioned determined BS is used as a reference factor to obtain a first threshold and a second threshold, the above-mentioned first threshold is used to determine whether to filter the above-mentioned possible filtering boundaries, and the above-mentioned second threshold is used to determine the above-mentioned The filtering strength for filtering on possible filtering boundaries;

Determine whether the above-mentioned possible filtering boundary needs to be filtered according to the gradient of pixels within a predetermined range in adjacent image blocks on both sides of the above-mentioned possible filtering boundary and the above-mentioned first threshold;

If it is determined that filtering is required, the filter for performing filtering is determined according to the relationship between the gradient of pixels within a predetermined range and the second threshold value in adjacent image blocks on both sides of the possible filtering boundary, and the determined filter is instructed to perform filtering for the above-mentioned needs The above possible filtering boundaries are filtered.

Further, if the above-mentioned encoding information also includes a quantization coefficient identification marking whether the above-mentioned adjacent image blocks have quantization coefficients;

Correspondingly, the above-mentioned processor 1304 is used to obtain the encoding information of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is specifically used to obtain the quantization coefficient coefficient identification;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1304 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the above-mentioned processor 1304 is specifically configured to if the encoding modes of the above-mentioned adjacent image blocks are all BaseLayer modes and the quantization coefficient identifier indicates that the above-mentioned adjacent image blocks have no quantization coefficients, then The boundary strength BS of the aforementioned possible filter boundaries is set as the first boundary strength.

Further, if the encoding information further includes a quantization coefficient identifier marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and a motion vector of the adjacent image block;

Correspondingly, the above-mentioned processor 1304 is used to acquire the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is specifically used to set the coding mode to the reference image of the above-mentioned image block in BaseLayer mode according to preset rules And the motion vector of the above-mentioned image block of the above-mentioned encoding mode being BaseLayer mode is set as the parameter corresponding to when the block at the same position in the reference image is stationary;

Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the above-mentioned possible filtering boundary, reference images of the above-mentioned adjacent image blocks, and motion vectors of the above-mentioned adjacent image blocks;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1304 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the above-mentioned processor 1304 is specifically configured to if the above-mentioned quantization coefficient identifier indicates that the above-mentioned adjacent image blocks have no quantization coefficients, and the above-mentioned adjacent image blocks have the same reference image, And the difference between the motion vectors of the adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the possible filtering boundary is set as the first boundary strength.

Further, corresponding to the above-mentioned processor 1304, which is used to set the boundary strength values of the above-mentioned possible filtering boundaries according to the above-mentioned encoding information; At least one of the above-mentioned image blocks has a quantization coefficient, or the above-mentioned adjacent image blocks have different reference images, or the difference between the motion vectors of the above-mentioned adjacent image blocks is greater than or equal to the preset threshold, then the above-mentioned possible filtering The border strength BS of the border is set to the second border strength.

Further, if the above-mentioned encoding information also includes a quantization coefficient identification marking whether the above-mentioned adjacent image blocks have quantization coefficients;

Correspondingly, the above-mentioned processor 1304 is used to obtain the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is specifically used to obtain whether the adjacent image blocks on both sides of the above-mentioned possible filtering boundary have quantization coefficients Quantization coefficient identification;

The above-mentioned different boundary strength values include a first boundary strength value and a second boundary strength value, and the above-mentioned second boundary strength value is greater than the above-mentioned first boundary strength value; correspondingly, the above-mentioned processor 1304 is configured to convert the above-mentioned possible The boundary strength BS of the filtering boundary is different from the boundary strength value; the processor 1304 is specifically configured to set the possible filtering boundary The boundary strength BS is set to the second boundary strength.

Further, if the above encoding information also includes reference images of the above adjacent image blocks:

Correspondingly, the above-mentioned processor 1304 is used to acquire the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is also used to set the coding mode as the reference image of the above-mentioned image block in BaseLayer mode according to the preset rules ; Obtain reference images of adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned processor 1304 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strengths BS according to the above-mentioned encoding information; quantization coefficients, and the above-mentioned adjacent image blocks have different reference images, then the boundary strength BS of the above-mentioned possible filtering boundary is set as the second boundary strength.

Further, if the above coding information also includes the motion vector of the above adjacent image block;

Correspondingly, the above-mentioned processor 1304 is used to obtain the coding information of adjacent image blocks on both sides of the above-mentioned possible filtering boundary; the above-mentioned processor 1304 is also used to set the motion vector of the above-mentioned image block whose coding mode is BaseLayer mode to be relative to The parameters corresponding to when the block at the same position in the reference image is still; obtaining the motion vectors of the adjacent image blocks on both sides of the above-mentioned possible filtering boundary;

Correspondingly, the above-mentioned processor 1304 is configured to set the boundary strength values of the above-mentioned possible filtering boundaries to different boundary strengths BS according to the above-mentioned encoding information; quantized coefficients, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is greater than or equal to the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set to Second boundary strength.

Further, corresponding to the above-mentioned processor 1304, which is used to set the boundary strength values of the above-mentioned possible filtering boundaries according to the above-mentioned encoding information; There are no quantization coefficients in the above-mentioned adjacent image blocks, and the above-mentioned adjacent image blocks have the same reference image, and the difference between the motion vectors of the above-mentioned adjacent image blocks is smaller than the preset threshold, then the boundary strength BS of the above-mentioned possible filtering boundary is set to is the first boundary strength.

It is worth noting that in the above-mentioned device embodiments, the units included are only divided according to functional logic, but are not limited to the above-mentioned divisions, as long as the corresponding functions can be realized; in addition, the specific names of each functional unit It is only for the convenience of distinguishing each other, and is not used to limit the protection scope of the present invention.

In addition, those of ordinary skill in the art can understand that all or part of the steps in the above-mentioned method embodiments can be completed by instructing related hardware through programs, and the corresponding programs can be stored in a computer-readable storage medium. The storage medium can be read-only memory, magnetic disk or optical disk and so on.

The above are only preferred specific implementation modes of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the embodiments of the present invention. , should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (36)

1. A boundary strength determination method, characterized in that, comprising: Determining the possible filtering boundaries of the deblocking filter DBF; Obtain the coding mode and coding information of the adjacent image blocks on both sides of the possible filtering boundary; When the encoding modes of the adjacent image blocks are not intra-frame Intra mode, and the encoding modes of the adjacent image blocks include at least one base layer BaseLayer mode, then according to the encoding information, the possible filtering The border strength of the border is set to a different border strength. 2. The method according to claim 1, wherein the encoding information includes a quantization coefficient identification marking whether the adjacent image block has a quantization coefficient; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes: Acquiring the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients; The different boundary strengths include a first boundary strength and a second boundary strength, the second boundary strength is greater than the first boundary strength, and the boundary strength of the possible filtering boundary is set according to the encoding information Specifics for different boundary strengths include: If the encoding modes of the adjacent image blocks are all BaseLayer modes and the quantization coefficient identifier indicates that none of the adjacent image blocks have quantization coefficients, then set the boundary strength of the possible filtering boundary as the first boundary strength. 3. The method according to claim 1, wherein the encoding information includes a quantization coefficient identification marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and the The motion vector of the adjacent image block; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes: Set the reference image of the image block whose encoding mode is the BaseLayer mode according to the preset rules and set the motion vector of the image block whose encoding mode is the BaseLayer mode to correspond to when the block at the same position in the reference image is stationary parameter; Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the possible filtering boundary, reference images of the adjacent image blocks, and motion vectors of the adjacent image blocks; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; and setting the boundary strengths of the possible filtering boundaries according to the encoding information Specifics for different boundary strengths include: If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is smaller than a preset threshold, then set the boundary strength of the possible filtering boundary as the first boundary strength. 4. The method according to claim 3, wherein, setting the boundary strength of the possible filtering boundary to different boundary strengths according to the encoding information further comprises: If the quantization coefficient flag indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different reference images, or the adjacent image blocks move If the vector difference is greater than or equal to the preset threshold, then the boundary strength of the possible filtering boundary is set as the second boundary strength. 5. The method according to claim 1, wherein the encoding information includes a quantization coefficient identification marking whether the adjacent image block has a quantization coefficient; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes: Acquiring the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; and setting the boundary strengths of the possible filtering boundaries according to the encoding information Specifics for different boundary strengths include: If the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, then set the boundary strength of the possible filtering boundary as a second boundary strength. 6. The method according to claim 5, wherein the encoding information further comprises reference images of the adjacent image blocks; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary further includes: Set the reference image of the image block whose encoding mode is BaseLayer mode according to the preset rule; obtain the reference image of the adjacent image block on both sides of the possible filtering boundary; The setting the boundary strength of the possible filtering boundary as the second different boundary strength according to the encoding information further includes: If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have different reference images, then set the boundary strength of the possible filtering boundary to the second boundary strength . 7. The method according to claim 6, wherein the encoding information further comprises motion vectors of the adjacent image blocks; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary further includes: Set the motion vector of the image block whose encoding mode is BaseLayer mode as the parameter corresponding to when the block at the same position in the reference image is still; Acquiring motion vectors of adjacent image blocks on both sides of the possible filtering boundary; The setting the boundary strength of the possible filtering boundary as the second different boundary strength according to the encoding information further includes: If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is greater than or is equal to the preset threshold, then the boundary strength of the possible filtering boundary is set as the second boundary strength. 8. The method according to claim 7, wherein said setting the boundary strength of said possible filtering boundary to different boundary strengths according to said encoding information further comprises: If the quantization coefficient flag indicates that there are no quantization coefficients in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than If the threshold is preset, the boundary strength of the possible filtering boundary is set as the first boundary strength. 9. The method according to any one of claims 2 to 8, wherein the first boundary strength is 0, and the second boundary strength is 1. 10. A filtering method for deblocking effect, comprising: Determining the possible filtering boundaries of the deblocking filter DBF; Obtain the coding mode and coding information of the adjacent image blocks on both sides of the possible filtering boundary; When the encoding modes of the adjacent image blocks are not intra-frame Intra mode, and the encoding modes of the adjacent image blocks include at least one base layer BaseLayer mode, then according to the encoding information, the possible filtering The border strength of the border is set to a different border strength; Using the determined boundary strength as a reference factor to obtain a first threshold and a second threshold, the first threshold is used to determine whether to filter the possible filtering boundaries, and the second threshold is used to determine whether to filter the possible filtering boundaries. The filtering strength of the possible filtering boundaries that need to be filtered; Determine whether the possible filtering boundary needs to be filtered according to the gradient of pixels within a predetermined range in adjacent image blocks on both sides of the possible filtering boundary and the first threshold; If it is determined that filtering is required, the filter for performing filtering is determined according to the relationship between the gradient of pixels in the predetermined range and the second threshold value in adjacent image blocks on both sides of the possible filtering boundary, and the determined filter is used to perform the necessary filtering. Filtering is performed on the possible filtering boundaries of the filtering. 11. The method according to claim 10, wherein the encoding information includes a quantization coefficient flag marking whether the adjacent image block has a quantization coefficient; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes: Acquiring the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; and setting the boundary strengths of the possible filtering boundaries according to the encoding information Specifics for different boundary strengths include: If the encoding modes of the adjacent image blocks are all BaseLayer modes and the quantization coefficient identifier indicates that none of the adjacent image blocks have quantization coefficients, then set the boundary strength of the possible filtering boundary as the first boundary strength. 12. The method according to claim 10, wherein the encoding information includes a quantization coefficient identification marking whether the adjacent image block has a quantization coefficient, a reference image of the adjacent image block, and the The motion vector of the adjacent image block; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes: Set the reference image of the image block whose encoding mode is the BaseLayer mode according to the preset rules and set the motion vector of the image block whose encoding mode is the BaseLayer mode to correspond to when the block at the same position in the reference image is stationary parameter; Obtain quantization coefficient identifiers of adjacent image blocks on both sides of the possible filtering boundary, reference images of the adjacent image blocks, and motion vectors of the adjacent image blocks; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; and setting the boundary strengths of the possible filtering boundaries according to the encoding information Specifically for the different boundary strengths include: If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is smaller than a preset threshold, then set the boundary strength of the possible filtering boundary as the first boundary strength. 13. The method according to claim 12, wherein the setting the boundary strength of the possible filtering boundary as the first boundary strength or the second boundary strength according to the encoding information further comprises: If the quantization coefficient flag indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different reference images, or the adjacent image blocks move If the vector difference is greater than or equal to the preset threshold, then the boundary strength of the possible filtering boundary is set as the second boundary strength. 14. The method according to claim 10, wherein the encoding information includes a quantization coefficient identification marking whether the adjacent image block has a quantization coefficient; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary specifically includes: Acquiring the quantization coefficient identification of whether the adjacent image blocks on both sides of the possible filtering boundary have quantization coefficients; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; and setting the boundary strengths of the possible filtering boundaries according to the encoding information Specifics for different boundary strengths include: If the quantization coefficient identifier indicates that at least one of the adjacent image blocks has a quantization coefficient, then set the boundary strength of the possible filtering boundary as a second boundary strength. 15. The method according to claim 14, wherein the encoding information further comprises reference images of the adjacent image blocks; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary further includes: Set the reference image of the image block whose encoding mode is BaseLayer mode according to the preset rule; obtain the reference image of the adjacent image block on both sides of the possible filtering boundary; The setting the boundary strength of the possible filtering boundary as the first boundary strength or the second boundary strength according to the encoding information further includes: If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have different reference images, then set the boundary strength of the possible filtering boundary to the second boundary strength . 16. The method according to claim 15, wherein the encoding information further comprises motion vectors of the adjacent image blocks; The acquiring the encoding information of adjacent image blocks on both sides of the possible filtering boundary further includes: Set the motion vector of the image block whose encoding mode is BaseLayer mode as the parameter corresponding to when the block at the same position in the reference image is still; obtain the motion vector of the adjacent image block on both sides of the possible filtering boundary ; The setting the boundary strength of the possible filtering boundary as the first boundary strength or the second boundary strength according to the encoding information further includes: If the quantization coefficient flag indicates that none of the adjacent image blocks has a quantization coefficient, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is greater than or is equal to the preset threshold, then the boundary strength of the possible filtering boundary is set as the second boundary strength. 17. The method according to claim 16, characterized in that, setting the boundary strength of the possible filtering boundaries to different boundary strengths according to the encoding information further comprises: If the quantization coefficient flag indicates that there are no quantization coefficients in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than If the threshold is preset, the boundary strength of the possible filtering boundary is set as the first boundary strength. 18. The method according to any one of claims 11-17, wherein the first boundary strength is 0, and the second boundary strength is 1. 19. A device for determining boundary strength, comprising: A first boundary determining unit, configured to determine possible filtering boundaries of the deblocking filter DBF; A first information acquiring unit, configured to acquire the encoding mode and encoding information of the adjacent image blocks on both sides of the possible filtering boundary determined by the first boundary determining unit; The first boundary strength determination unit is used for when the encoding modes of the adjacent image blocks acquired by the first information acquiring unit are not intra-frame Intra mode, and the encoding modes of the adjacent image blocks include at least one basic layer BaseLayer mode, set the boundary strengths of the possible filtering boundaries to different boundary strengths according to the encoding information. 20. The apparatus of claim 19, wherein: The first information acquisition unit is specifically configured to acquire quantization coefficient identifiers of whether the adjacent image blocks on both sides of the possible filtering boundary determined by the first boundary determination unit have quantization coefficients; The different boundary strengths include a first boundary strength and a second boundary strength, the second boundary strength is greater than the first boundary strength, and the first boundary strength determining unit is specifically configured to if the adjacent image If the encoding modes of the blocks are all BaseLayer modes and the quantization coefficient identifier indicates that the adjacent image blocks have no quantization coefficients, then the boundary strength of the possible filtering boundary is set as the first boundary strength. 21. The device of claim 19, wherein: The first information acquisition unit is specifically configured to acquire the quantization coefficient identifier indicating whether the adjacent image block has a quantization coefficient included in the encoding information, the reference image of the adjacent image block, and the Motion vectors of adjacent image blocks; The first boundary strength determination unit includes: a first parameter setting unit, a first parameter acquisition unit, and a first boundary strength determination subunit; The first parameter setting unit is configured to set the reference image of the image block whose encoding mode is BaseLayer mode according to a preset rule and set the motion vector of the image block whose encoding mode is BaseLayer mode to be relative to the reference image The corresponding parameters when the block at the same position in the image is still; The first parameter acquisition unit is configured to acquire quantization coefficient identifiers of adjacent image blocks on both sides of the possible filtering boundary determined by the first boundary determination unit, and reference images of the adjacent image blocks, and the Motion vectors of adjacent image blocks; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; the first boundary strength determination subunit is configured to identify indicating that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than a preset threshold, then the The boundary strength of the possible filter boundaries is set to the first boundary strength. 22. The device of claim 21, wherein: The first boundary strength determining subunit is further configured to if the quantization coefficient flag indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different , or the difference between the motion vectors of the adjacent image blocks is greater than or equal to a preset threshold, then the boundary strength of the possible filtering boundary is set as the second boundary strength. 23. The apparatus of claim 19, wherein: The first information acquisition unit is specifically configured to acquire quantization coefficient identifiers of whether the adjacent image blocks on both sides of the possible filtering boundary determined by the first boundary determination unit have quantization coefficients; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; the first boundary strength determining unit is specifically configured to if the quantization coefficient identifies Indicating that at least one of the adjacent image blocks has a quantization coefficient, then setting the boundary strength of the possible filtering boundary as the second boundary strength. 24. The apparatus of claim 23, wherein: The first information acquisition unit is further configured to set the encoding mode as the reference image of the image block in BaseLayer mode according to preset rules; acquire the reference images of adjacent image blocks on both sides of the possible filtering boundary; The first boundary strength determination unit is further configured to set the possible The boundary strength of the filter boundary is set to the second boundary strength. 25. The device of claim 24, wherein: The first information acquiring unit is further configured to acquire motion vectors of the adjacent image blocks included in the encoding information; The first boundary strength determination unit includes: a second parameter setting unit, a second parameter acquisition unit, and a second boundary strength determination subunit; The second parameter setting unit is configured to set the motion vector of the image block whose encoding mode is BaseLayer mode as a parameter corresponding to when the block at the same position in the reference image is still; The second parameter acquisition unit is configured to acquire motion vectors of adjacent image blocks on both sides of the possible filtering boundary; The second boundary strength determination subunit is configured to if the quantization coefficient flag indicates that none of the adjacent image blocks has quantization coefficients, and the adjacent image blocks have the same reference image, and the adjacent If the difference between the image block motion vectors is greater than or equal to a preset threshold, then the boundary strength of the possible filtering boundary is set as the second boundary strength. 26. The device of claim 25, wherein: The second boundary strength determination subunit is further configured to if the quantization coefficient flag indicates that there is no quantization coefficient in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the If the difference between motion vectors of adjacent image blocks is smaller than a preset threshold, then the boundary strength of the possible filtering boundary is set as the first boundary strength. 27. The device according to any one of claims 20-26, wherein the first boundary strength is 0, and the second boundary strength is 1. 28. A filtering device for deblocking effect, comprising: The second boundary determining unit is used to determine possible filtering boundaries of the deblocking filter DBF; A second information acquisition unit, configured to acquire the encoding mode and encoding information of image blocks adjacent to both sides of the possible filtering boundary determined by the second boundary determination unit; The second boundary strength determination unit is used for when the encoding modes of the adjacent image blocks acquired by the second information acquiring unit are not intra-frame Intra mode, and the encoding modes of the adjacent image blocks include at least one basic layer BaseLayer mode, then set the boundary strength of the possible filtering boundary to different boundary strengths according to the encoding information; A threshold acquisition unit, configured to use the determined boundary strength as a reference factor to acquire a first threshold and a second threshold, the first threshold is used to determine whether to filter the possible filtering boundaries, and the second The second threshold is used to determine the filtering strength for filtering the possible filtering boundaries that need to be filtered; A filtering decision unit, configured to determine whether the possible filtering boundary needs to be adjusted according to the gradient of pixels within a predetermined range in adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determining unit and the first threshold value filter; The filter control unit is used to determine the filter for performing filtering according to the relationship between the pixel gradient in the predetermined range and the second threshold value in the adjacent image blocks on both sides of the possible filtering boundary if the filtering decision unit determines that filtering is required, and use The determined filter performs filtering processing on the possible filtering boundaries that need to be filtered. 29. The device of claim 28, wherein: The second information acquisition unit is specifically configured to acquire quantization coefficient identifiers of whether the adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determination unit have quantization coefficients; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; the second boundary strength determination unit is specifically configured to if the adjacent image If the encoding modes of the blocks are all BaseLayer modes and the quantization coefficient identifier indicates that the adjacent image blocks have no quantization coefficients, then the boundary strength of the possible filtering boundary is set as the first boundary strength. 30. The device of claim 29, wherein: The second information acquisition unit is specifically configured to acquire the quantization coefficient identifier indicating whether the adjacent image block has a quantization coefficient included in the encoding information, the reference image of the adjacent image block, and the Motion vectors of adjacent image blocks; The second boundary strength determination unit includes: a third parameter setting unit, a third parameter acquisition unit, and a third boundary strength determination subunit; The third parameter setting unit is used to set the reference image of the image block whose encoding mode is BaseLayer mode according to preset rules and set the motion vector of the image block whose encoding mode is BaseLayer mode relative to the reference image The corresponding parameters when the block at the same position is stationary; The third parameter acquisition unit is configured to acquire quantization coefficient identifiers of adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determination unit, and reference images of the adjacent image blocks, and the Motion vectors of adjacent image blocks; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; the third boundary strength determination subunit is configured to identify indicating that none of the adjacent image blocks have quantization coefficients, and the adjacent image blocks have the same reference image, and the difference between the motion vectors of the adjacent image blocks is less than a preset threshold, then the The boundary strength of the possible filter boundaries is set to the first boundary strength. 31. The device of claim 30, wherein: The third boundary strength determination subunit is further configured to if the quantization coefficient flag indicates that at least one of the adjacent image blocks has a quantization coefficient, or the adjacent image blocks have different , or the difference between the motion vectors of the adjacent image blocks is greater than or equal to a preset threshold, then the boundary strength of the possible filtering boundary is set as the second boundary strength. 32. The device of claim 28, wherein: The second information acquisition unit is specifically configured to acquire quantization coefficient identifiers of whether the adjacent image blocks on both sides of the possible filtering boundary determined by the second boundary determination unit have quantization coefficients; The different boundary strengths include a first boundary strength and a second boundary strength, and the second boundary strength is greater than the first boundary strength; the second boundary strength determination unit is specifically configured to if the quantization coefficient identifies Indicating that at least one of the adjacent image blocks has a quantization coefficient, then setting the boundary strength of the possible filtering boundary as the second boundary strength. 33. The device of claim 32, wherein: The second information acquisition unit is further configured to set the encoding mode as the reference image of the image block in BaseLayer mode according to preset rules; acquire the reference images of adjacent image blocks on both sides of the possible filtering boundary; The second boundary strength determining unit is further configured to set the possible The boundary strength of the filter boundary boundary strength is set to the second boundary strength. 34. The device of claim 33, wherein: The second information acquiring unit is further configured to acquire motion vectors of the adjacent image blocks included in the coding information; The second boundary strength determination unit includes: a fourth parameter setting unit, a fourth parameter acquisition unit, and a fourth boundary strength determination subunit; The fourth parameter setting unit is configured to set the motion vector of the image block whose encoding mode is BaseLayer mode as a parameter corresponding to when the block at the same position in the reference image is still; The fourth parameter acquisition unit is configured to acquire motion vectors of adjacent image blocks on both sides of the possible filtering boundary; The fourth boundary strength determining subunit is configured to if the quantization coefficient flag indicates that none of the adjacent image blocks has quantization coefficients, and the adjacent image blocks have the same reference image, and the adjacent If the difference between the image block motion vectors is greater than or equal to a preset threshold, then the boundary strength of the possible filtering boundary is set as the second boundary strength. 35. The device of claim 34, wherein: The fourth boundary strength determining subunit is further configured to if the quantization coefficient flag indicates that there is no quantization coefficient in the adjacent image blocks, and the adjacent image blocks have the same reference image, and the If the difference between motion vectors of adjacent image blocks is smaller than a preset threshold, then the boundary strength of the possible filtering boundary is set as the first boundary strength. 36. The device according to any one of claims 29-35, wherein the first boundary strength is 0, and the second boundary strength is 1.