CN112612433A - Screen projection method, device and system for vertical screen video - Google Patents
Screen projection method, device and system for vertical screen video Download PDFInfo
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Abstract
The invention relates to the technical field of screen projection, and discloses a screen projection method, equipment and a system for a vertical screen video. And the front-end equipment scales and/or rotates the data to obtain the data to be coded so as to adapt to the hardware decoding capability of the terminal equipment. The data is subjected to preprocessing to adapt to the hardware decoding capability of the terminal equipment, so that the method is suitable for the trend that the resolution of the front-end equipment is higher and higher.
Description
Technical Field
The invention belongs to the technical field of screen projection, and particularly relates to a screen projection method, equipment and system for a vertical screen video.
Background
Because the portable intelligent device display screen is less, be not convenient for watch, more and more users like to throw the screen to show the screen display with big and watch, throw the screen and also increasingly popular. The screen projection technology is generally based on a coding and decoding technology, and smart phones, tablets and other front-end devices needing screen projection encode data and then send the encoded data to a rear-end screen projection terminal device for decoding and displaying.
As smart devices such as smart phones and tablets are used as portable devices with small screens, the configuration of the smart devices is improved correspondingly as functions and demands of people increase. With the higher and higher configuration of the intelligent equipment and the faster and faster network, the resolution of the video is also higher and higher, and the definition is also higher and higher. However, when the front-end devices of display terminals such as televisions with slow update speeds are developed more and more rapidly, the soft decoding of the display terminals is also laborious. For a high-definition video screen, hard decoding is needed to smoothly watch the video, but due to the limitation of some hard decoding capabilities, the display resolution of the front-end device is already higher than the maximum supported resolution of the terminal device, so that the front-end device cannot adapt to the hardware decoding capability of the display terminal device.
Disclosure of Invention
In order to solve the problem that the existing terminal equipment cannot be adapted due to limited hardware decoding capability, the invention aims to provide a screen projection method, equipment and a system for a vertical screen video, so that front-end equipment can be adapted to the hardware decoding capability of a display terminal.
The invention is realized by the following technical scheme:
a screen projection method of a vertical screen video is applied to front-end equipment needing screen projection and comprises the following steps:
A. acquiring the hard decoding capability of the projected screen terminal equipment;
B. acquiring the resolution of the data needing to be projected by the front-end equipment;
C. zooming and/or rotating data according to the hard decoding capability of the screen-projected terminal and the resolution of the data to be projected by the front-end equipment to obtain data to be encoded so as to adapt to the hardware decoding capability of the terminal equipment;
D. the data is encoded.
The method and the device perform pre-processing on the data according to the hardware decoding capability of the projected screen terminal and the resolution of the data needing to be projected by the front-end equipment so as to adapt to the hardware decoding capability of the terminal equipment and adapt to the trend that the resolution of the front-end equipment is higher and higher. When the data preprocessing is carried out, the zooming or rotating processing can be directly carried out, and the rotating and zooming processing can also be carried out simultaneously, if only the zooming or rotating processing is singly adopted, the situation is single, the resolution of some data is seriously damaged, and the display resolution of the terminal equipment is influenced, so that the zooming and rotating operations are preferably simultaneously adopted.
A screen projection method of a vertical screen video is applied to projected screen terminal equipment and comprises the following steps:
a. receiving data coded by the method;
b. hard decoding the data;
c. and displaying the data.
A front-end device, comprising:
the first data acquisition device is used for acquiring the decoding capability of the terminal equipment;
the second data acquisition device is used for acquiring the resolution of the screen projection data of the front-end equipment;
the data judgment device judges whether the data needs to be rotated or/and zoomed according to the decoding capability of the terminal equipment and the resolution of the data needing to be projected by the front-end equipment;
operating means for rotating or/and scaling the data;
encoding means for encoding the output data of the operation means;
and the first data transmission device realizes coded data interaction with the terminal equipment.
A terminal device, comprising:
second data transmission means for enabling encoded data interaction with the head-end apparatus of claim 8;
a decoding device for decoding the encoded data;
a data processing device for judging the data direction and reversely rotating the data;
a data display device for displaying data.
A screen projection system of a vertical screen video comprises the front-end equipment and the terminal equipment for realizing information interaction with the front-end equipment.
Compared with the prior art, the invention at least has the following advantages and beneficial effects:
the invention carries out pre-processing on the data according to the hardware decoding capability of the projected screen terminal and the resolution of the data needing to be projected by the front-end equipment so as to adapt to the hardware decoding capability of the terminal equipment and adapt to the trend of higher and higher resolution of the front-end equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a flow chart of an embodiment of the method of the present invention.
Fig. 3 is a schematic diagram of the system of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that, for the term "and/or" as may appear herein, it is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time; for the term "/and" as may appear herein, which describes another associative object relationship, it means that two relationships may exist, e.g., a/and B, may mean: a exists independently, and A and B exist independently; in addition, for the character "/" that may appear herein, it generally means that the former and latter associated objects are in an "or" relationship.
It will be understood that when an element is referred to herein as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. Conversely, if a unit is referred to herein as being "directly connected" or "directly coupled" to another unit, it is intended that no intervening units are present. In addition, other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative designs, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
It should be understood that specific details are provided in the following description to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.
Example 1
As shown in fig. 1, the present embodiment discloses a screen projection method for a vertical screen video, which is applied to a front-end device requiring screen projection, and includes the following steps:
A. acquiring the hard decoding capability of the terminal equipment to be projected, wherein the maximum resolution supported by the hard decoding of the terminal equipment is W1xH1, W1 is the horizontal pixel of the maximum resolution supported by the hard decoding of the terminal equipment, and H1 is the vertical pixel of the maximum resolution supported by the hard decoding of the terminal equipment;
B. acquiring the resolution of data needing to be projected by front-end equipment, wherein the resolution of the data needing to be projected by the front-end equipment is W2xH2, W2 is a horizontal pixel of the resolution of the data needing to be projected, and H2 is a vertical pixel of the resolution of the data needing to be projected;
C. the method comprises the steps that data are scaled and/or rotated according to the hard decoding capability of a screen-projected terminal and the resolution of data needing to be projected by front-end equipment to obtain data to be encoded so as to adapt to the hardware decoding capability of the terminal equipment, wherein the resolution of the data to be encoded is WxH, W is a horizontal pixel of the resolution of the data to be encoded, H is a vertical pixel of the resolution of the data to be encoded, W is not less than W1, and H is not more than H1; in this step, scaling or rotation can be directly performed or rotation and scaling operations can be performed at the same time according to the situation, that is, the scaled data can be used as data to be encoded, the rotated data can also be used as data to be encoded, or the data after rotation and scaling can be used as the final data to be encoded;
D. the data is encoded.
And after receiving the coded data, the terminal equipment performs hard decoding display on the data. If the front-end equipment rotates the data, the terminal equipment rotates reversely after decoding the data, and then the data can be displayed.
Example 2
Based on the principle of the method in the foregoing embodiment, the present embodiment describes the operation before encoding in detail by taking an example that the maximum resolution W1xH1 supported by the hardware decoding capability of the terminal device is 1920 × 1080 and the resolution W2xH2 of the data to be projected by the front-end device is 1080 × 1920.
This operation can be performed in a number of ways:
one is as follows: after the front-end equipment acquires the two groups of data, the comparison shows that H1 is less than H2, the data needing to be projected can be directly zoomed to be matched with the hardware decoding capability of the terminal equipment, and the data obtained through zooming is directly used as coded data. The scaling method is various, and only the horizontal pixel W of the scaled data resolution is required to be smaller than W1 and H < H1. In order to increase the display resolution of the terminal device, the scaling may be performed in the following manner,
if condition 3 or condition 4 is satisfied, scaling is performed, and condition 3 is: w2> W1, condition 4 is: h2> H1; because the condition 4 is met, zooming is carried out, and the zooming method comprises the following steps:
if W2xH1> W1xH2, then W ═ W1, H ═ W1xH 2/W2;
if W2xH1< ═ W1xH2, then W2xH 1/H2; H-H1.
Since W2xH1< ═ W1xH2,
then:
W＝W2xH1/H2＝1080*1080/1920＝607，
H＝H1＝1080；
i.e. the resulting resolution of the data to be encoded is 607x 1080.
Correspondingly, the resolution of the encoded data received by the terminal device is 607x1080, wherein 607< W1, 1080 is not more than H1, then the encoded data is matched with the decoding capability of the terminal device, and the terminal device can display the decoded data.
The second step is as follows: by adopting the mode, the resolution ratio of the data is obviously reduced, the display effect of the projection screen is influenced, and the problem can be solved by adopting a rotating mode.
Specifically, after the front-end device acquires the two groups of data, the comparison shows that H1 is less than H2, the data needing to be projected can be directly rotated to match the hardware decoding capability of the terminal device, and the data obtained through rotation is directly used as encoded data. After rotation, the horizontal pixel W3 with the data resolution after scaling is only required to be smaller than W1, H3< H1. Its scaling may be in the following way:
if condition 1 or condition 2 is satisfied, rotation is performed, and condition 1 is: w1> H1 and W2< H2, condition 2 is: w1< H1 and W2> H2; the rotation mode is to rotate 90 degrees leftwards or rightwards. Since the condition 1 is satisfied, the resolution of the rotated data is 1920x1080, wherein 1920 is less than or equal to W1 and 1080 is less than or equal to H1, and the encoded data is matched with the decoding capability of the terminal device.
After receiving the encoded data, the terminal device determines that the data is rotated, and rotates the data in the reverse direction, i.e., rotates the data to the right or left by 90 degrees, and then displays the data. At this time, the resolution of the data displayed by the terminal device is 1080 × 1920, and the resolution is the same as the resolution of the original data, so that the data display resolution can be greatly improved, and the impression effect is improved.
Example 3
Based on the principle of the method in embodiment 1, this embodiment describes the operation before encoding in detail by taking an example where the maximum resolution W1xH1 supported by the hardware decoding capability of the terminal device is 1920 × 1080 and the resolution W2xH2 of the data to be projected by the front-end device is 1800 × 3200.
This operation can be performed in a number of ways:
one is as follows: after the front-end equipment acquires the two groups of data, the comparison shows that H1 is less than H2, the data needing to be projected can be directly zoomed to be matched with the hardware decoding capability of the terminal equipment, and the data obtained through zooming is directly used as coded data. The scaling method is various, and only the horizontal pixel W of the scaled data resolution is required to be smaller than W1 and H < H1. Likewise, this embodiment adopts the same scaling manner as embodiment 2:
because W2xH1< W1xH2,
then:
W＝W2xH1/H2＝1800x1800/3200＝607,
H＝H1＝1080。
i.e. the resulting resolution of the data to be encoded is 607x 1080.
Correspondingly, the resolution of the encoded data received by the terminal device is 607x1080, wherein 607< W1, 1080 is not more than H1, then the encoded data is matched with the decoding capability of the terminal device, and the terminal device can display the decoded data.
The second step is as follows: by adopting the above mode, the resolution of the data is obviously reduced, the display effect of the screen projection is influenced, the matching with the hardware decoding capability of the terminal equipment cannot be ensured only by adopting a rotation mode, the problem can be solved by adopting a rotation and scaling mode, and the specific implementation mode is shown in fig. 2 in detail.
Specifically, after the front-end device acquires the two groups of data, the comparison shows that H1 is less than H2, the screen projection data are rotated and then zoomed, and the resolution of the data obtained through rotation is W3xH 3.
If the condition 1 or the condition 2 is satisfied, the rotation is performed first, and the condition 1 is as follows: w1> H1 and W2< H2, condition 2 is: w1< H1 and W2> H2; the rotation mode is to rotate 90 degrees leftwards or rightwards. Since the condition 1 is satisfied, the resulting data resolution W3xH3 after 90 degrees of leftward or rightward rotation is 3200x1800, and at this time, the decoding capability of the terminal device is not yet adapted.
The rotated data is scaled, and the method of embodiment 2 is also used for scaling in this embodiment.
Because W3xH1 ═ W1xH3,
then:
W＝W3xH1/H3＝3200x1080/1800＝1920,
H＝H1＝1080。
i.e. the resulting resolution of the data to be encoded is 1920x 1080.
Correspondingly, the resolution of the encoded data received by the terminal device is 1920x1080, wherein 1920 is less than or equal to W1 and 1080 is less than or equal to H1, and the encoded data is matched with the decoding capability of the terminal device.
After receiving the encoded data, the terminal device determines that the data is rotated, and rotates the data in the reverse direction, i.e., rotates the data to the right or left by 90 degrees, and then displays the data. At this time, the resolution of the data displayed by the terminal device is 1080 × 1920, which is greater than the resolution of the display in the embodiment that only the scaling mode is adopted, so that the data display resolution can be greatly improved, and the impression effect can be improved.
In conclusion, the data processing mode of firstly rotating and then zooming is adopted, so that the method not only adapts to various conditions, ensures the matching of the front-end data and the hardware decoding capability of the terminal equipment, but also can maximally ensure the display resolution and improve the impression effect.
That is, when scaling is performed, it may adopt the following method:
if condition 3 or condition 4 is satisfied, scaling is performed, and condition 3 is: w4> W1, condition 4 is: h4> H1, wherein W4 is a horizontal pixel of the data resolution to be projected or a horizontal pixel rotated to obtain an intermediate data resolution, and H4 is a vertical pixel of the data resolution to be projected or a vertical pixel rotated to obtain the intermediate data resolution;
the scaling mode is as follows:
if W4xH1> W1xH4, then W ═ W1, H ═ W1xH 4/W4;
if W4xH1< ═ W1xH4, then W4xH 1/H4; H-H1.
Example 4
Based on the method of the foregoing embodiment, this embodiment discloses a system for implementing the method, where the system includes a front-end device and a terminal device, as shown in fig. 3.
The front-end equipment comprises a first data acquisition device, a second data acquisition device, a data judgment device, an operation device, an encoding device and a first data transmission device. The first data acquisition device is used for acquiring the decoding capability of the terminal equipment; the second data acquisition device is used for acquiring the resolution of the data needing to be projected by the front-end equipment; the data judging device judges whether the data needs to be rotated or/and zoomed according to the decoding capability of the terminal equipment and the resolution of the data needing to be projected by the front-end equipment, and judges whether the data needs to be rotated or/and zoomed by adopting the method in the embodiment 1-3; the operation device performs rotation or/and scaling operation on the data according to the result of the data judgment device; the encoding device encodes the output of the operation device and transmits the encoded output to the first data transmission device.
And the terminal equipment comprises a second data transmission device, a decoding device, a data processing device and a data display device. The second data transmission device and the first data transmission device exchange information, after the second data transmission device receives the coded data of the front-end equipment, the decoding device decodes the data and sends the decoded data to the data processing device, the data processing device judges the direction of the data, and if the front-end equipment rotates the data, the data is reversely rotated and then sent to the display device to be displayed.
The embodiments described above are merely illustrative, and may or may not be physically separate, if referring to units illustrated as separate components; if reference is made to a component displayed as a unit, it may or may not be a physical unit, and may be located in one place or distributed over a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: modifications may be made to the embodiments described above, or equivalents may be substituted for some of the features described. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Finally, it should be noted that the present invention is not limited to the above alternative embodiments, and that various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (10)
1. A screen projection method of a vertical screen video is applied to front-end equipment needing screen projection, and is characterized by comprising the following steps:
A. acquiring the hard decoding capability of the projected screen terminal equipment;
B. acquiring the resolution of the data needing to be projected by the front-end equipment;
C. zooming and/or rotating data according to the hard decoding capability of the screen-projected terminal and the resolution of the data to be projected by the front-end equipment to obtain data to be encoded so as to adapt to the hardware decoding capability of the terminal equipment;
D. the data is encoded.
2. The method for projecting vertical screen video according to claim 1,
the maximum resolution supported by the hard decoding of the terminal equipment is W1xH1, wherein W1 is the horizontal pixel of the maximum resolution supported by the hard decoding of the terminal equipment, and H1 is the vertical pixel of the maximum resolution supported by the hard decoding of the terminal equipment;
the resolution of the data to be encoded is WxH, wherein W is a horizontal pixel of the resolution of the data to be encoded, H is a vertical pixel of the resolution of the data to be encoded, W is less than or equal to W1, and H is less than or equal to H1.
3. The method for projecting the vertical screen video according to claim 2,
the specific method of the step B is as follows:
judging whether the data are rotated or not, if so, performing rotation operation to obtain intermediate data with the resolution of W3xH3, wherein W3 is a horizontal pixel with the intermediate data resolution, and H3 is a vertical pixel with the intermediate data resolution;
and judging whether the rotated data is zoomed, and if the data is zoomed, zooming to obtain the data to be coded.
4. The screen projection method of a vertical screen video according to claim 2,
if condition 1 or condition 2 is satisfied, rotation is performed, and condition 1 is: w1> H1 and W2< H2, condition 2 is: w1< H1 and W2> H2, wherein the resolution of the data needing to be projected by the front-end equipment is W2xH2, W2 is a horizontal pixel of the resolution of the data needing to be projected, and H2 is a vertical pixel of the resolution of the data needing to be projected; the rotation mode is to rotate 90 degrees leftwards or rightwards.
5. The screen projection method of a vertical screen video according to claim 2,
if condition 3 or condition 4 is satisfied, scaling is performed, and condition 3 is: w4> W1, condition 4 is: h4> H1, wherein W4 is a horizontal pixel of the data resolution to be projected or a horizontal pixel rotated to obtain an intermediate data resolution, and H4 is a vertical pixel of the data resolution to be projected or a vertical pixel rotated to obtain the intermediate data resolution;
the scaling mode is as follows:
if W4xH1> W1xH4, then W ═ W1, H ═ W1xH 4/W4;
if W4xH1< ═ W1xH4, then W4xH 1/H4; H-H1.
6. A screen projection method of a vertical screen video is applied to projected screen terminal equipment and is characterized by comprising the following steps:
a. receiving data encoded by any of the methods of claims 1-5;
b. hard decoding the data;
c. and displaying the data.
7. The screen projection method of the vertical screen video as claimed in claim 6, further comprising determining the data direction and performing a reverse rotation operation on the data.
8. A front-end device, comprising:
the first data acquisition device is used for acquiring the decoding capability of the terminal equipment;
the second data acquisition device is used for acquiring the resolution of the screen projection data of the front-end equipment;
the data judgment device judges whether the data needs to be rotated or/and zoomed according to the decoding capability of the terminal equipment and the resolution of the data needing to be projected by the front-end equipment;
operating means for rotating or/and scaling the data;
encoding means for encoding the output data of the operation means;
and the first data transmission device realizes coded data interaction with the terminal equipment.
9. A terminal device, comprising:
second data transmission means for enabling encoded data interaction with the head-end apparatus of claim 8;
a decoding device for decoding the encoded data;
a data processing device for judging the data direction and reversely rotating the data;
a data display device for displaying data.
10. A screen projection system of a vertical screen video, which is characterized by comprising the front-end device of claim 8 and a terminal device which realizes information interaction with the front-end device in claim 9.
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| CN113301128A (en) * | 2021-05-06 | 2021-08-24 | 深圳乐播科技有限公司 | Picture screen projection method, device, equipment and storage medium |
| CN113316013A (en) * | 2021-05-31 | 2021-08-27 | 烽火通信科技股份有限公司 | Video screen projection method and system |
| CN114157891A (en) * | 2021-11-26 | 2022-03-08 | 瑞森网安(福建)信息科技有限公司 | Screen projection terminal self-adaptive docking method, system and storage medium |
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