CN201708878U - Image processing device with 3D deinterlacing - Google Patents

Abstract

An image processing device with 3D de-interlacing is used for receiving a video signal, wherein the video signal carries display data and vertical blanking interval data, and is used for calculating image data based on a continuous video field and processing anti-copy information carried in VBI data. Therefore, the hardware is used for providing higher de-interlacing speed and better picture quality, when the device is matched with a computer host for use, the resource of the computer host can be saved, the burden is reduced, and whether the copy-proof is needed or not can be solved by using the copy-proof judging software integrated in the computer host, so that the expenditure of additional hardware is reduced, and the cost is greatly reduced.

Description

Image processing device with 3D deinterlacing

technical field

The utility model relates to an image processing device with 3D de-interlacing, in particular to a computer display screen that can be used to watch TV images, especially refers to fast speed, good picture quality, does not occupy computer resources, and can be solved by software. A 3D de-interlacing image processing device that requires copy protection.

Background technique

A dynamic image is composed of a series of continuous static images, each of which is called a frame (Frame), and the number of static images contained in a dynamic image per second is called the frame (rate) rate (Frame Per Second, FPS).

There are two ways to display dynamic images on the display. One is progressive scanning, or progressive scanning, which is used to move all the pixels of each frame from left to right and from top to bottom one by one. The second is interlaced (Interlace) scanning, or interlaced scanning, which is used to separate the odd-numbered and even-numbered pixels of a frame of image into two fields (Field), and then scan the odd-numbered lines in turn. The field and the field formed by the even-numbered rows.

Due to the limitations of hardware speed and buffer memory size, general digital digital cameras cannot continuously shoot progressive images. Therefore, general digital digital cameras shoot interlaced images, because interlaced images have less than half the amount of information than progressive images. , thus reducing hardware speed and buffer memory size requirements by nearly half. Because a field has only half of the information of a frame, when the processing speed of the device cannot process the information of the entire frame in real time and the transmission bandwidth is not enough to transmit the entire frame in real time, using interleaved scanning can save half of the information and maintain the same update rate. In the past, it was difficult for Cathode Ray Tube (CRT) monitors to scan the entire screen at one time, so progressive scanning could not be used. But because of the afterglow of fluorescent light on the screen and the persistence of vision effect, interlaced scanning works quite well on CRT displays. So a broadcast TV system such as NTSC has 59.94 fields per second, and PAL has 50 fields per second.

Modern display devices are now fast enough to process and scan entire frames in real time, so progressive scan is used. However, the new progressive scanning display device shows that when the traditional progressive images are not continuously captured, each field is captured at a different time, which means that there will never be a way to perfectly interleave. For example, if there is a digital camera that shoots sixty fields per second, the first field is shot at 1/60 second, and the second field is shot at 2/60 second. Combining the two fields together, if If the subject is not moving, the combined image looks perfect; however, if the subject is moving, the contents of the two fields will be quite different, and the combined image will produce a "Sawtooth" effect. Therefore, playing interlaced images directly on these new display devices will cause severe flickering, and because only one of the two lines of the interlaced signal has images, and the other line is completely black, the brightness will appear to be reduced by half. Due to the above-mentioned problems, all new display devices using progressive scanning need to have a de-interlacing function, that is, a method of converting an interlaced video signal into a progressive video signal.

A known image deinterlacing device, as shown in FIG. 4 , uses a TV capture card 3 to receive TV signals, and converts the TV signals into a bus conforming to a bus through an internal video decoder 31 and a bridge 32. Interface 33 format signal, so the user can use the monitor 41 of the computer 4 to watch TV programs.

The process of converting the TV signal into a signal that can be watched by the computer 4 monitor 41 requires deinterlacing (Deinterlace) processing. After the TV signal is digitized, it enters the computer 4. The computer 4 uses software 40 to deinterlace the TV signal from the interlaced scan format to the progressive scan format, and then plays the progressive scan image on the display 41; in addition, the computer 4 also uses The VBI Slice data deciphered by the audio-visual decoder 31 judges whether the TV signal is marked as anti-copy information. Therefore, the deinterlacing function of the known TV capture card 3 is executed by the software 40 of the computer 4 , and the method of processing whether to prevent copying is jointly processed by the hardware of the computer 4 and the audio-visual decoder 31 .

However, video processing requires a very large amount of calculation, and using a computer to perform de-interlacing will occupy computer resources and impose a burden on the computer. In order to reduce the computational load of the computer, the de-interlacing algorithm is generally simplified; however, the simplified algorithm will cause poor image quality. In addition, the speed of de-interlacing using software is usually relatively slow, which may also cause the picture to be unsmooth. Therefore, it generally cannot meet the needs of users in actual use.

Contents of the invention

The technical problem to be solved by the utility model is: aiming at the deficiencies of the above-mentioned prior art, provide a display screen that can be borrowed from a computer to watch TV images. An image processing device with 3D de-interlacing that requires copy protection.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a kind of image processing device with 3D de-interlacing, the device includes a bridge unit and a bus interface; it is characterized in that it also includes a video decoding unit, VBI capture unit, a 3D de-interlacing module, a memory unit, and a VBI anti-copy judgment unit, the video decoding unit is connected to the VBI capture unit; the 3D de-interlacing module is coupled to the video decoding unit, including a memory control unit and Dynamic de-interleaving unit; the memory unit is coupled to the 3D de-interleaving module; the bridge unit is coupled to the 3D de-interleaving module and the VBI capture unit, and is output to a computer host through a bus interface; the VBI is copy-proof The judging unit is integrated in the computer host and connected with the bus interface.

Compared with the prior art, the utility model has the advantages that the hardware can be used to provide faster deinterlacing speed and better picture quality, and when used with a host computer, it can save the resources of the host computer and reduce its burden , can also use the anti-copy judgment software integrated in the computer host to solve whether copy protection is needed, so as to reduce the expenditure of additional hardware and greatly reduce the cost.

Description of drawings:

FIG. 1 is a schematic diagram of an image processing device with 3D de-interlacing in a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of the video field output by the video decoding unit of the present invention.

FIG. 3 is a schematic block diagram of the 3D de-interlacing module of the present invention.

FIG. 4 is a schematic diagram of a known image deinterlacing device.

Label description:

Video decoding unit 11 VBI capture unit 12

3D de-interlacing module 13 Memory control unit 131

Dynamic de-interleaving unit 132 Memory unit 14

Bridge unit 15 Bus interface 16

VBI anti-copy judgment unit 17 computer host 2

Display screen 21 TV capture card 3

Video Decoder 31 Bridge 32

bus interface 33 computer 4

Software 40 Display 41

Detailed ways:

Please refer to Figures 1-3, which are a schematic diagram of an image processing device with 3D de-interlacing in a preferred embodiment of the present invention, a schematic diagram of the video field output by the video decoding unit of the present invention, and a 3D de-interlacing of the present invention. Block diagram of the module. As shown in the figure: the utility model is an image processing device with 3D deinterlacing, which receives a video signal which carries a display data and a vertical blanking interval (Vertical Blanking Interval, VBI) data for Calculate an image data based on a continuous video field, and process anti-copy information carried in a VBI data, the device at least includes a video decoding unit 11, a VBI capture unit 12, a 3D deinterleaving module 13, and a memory unit 14. A bridge unit 15 and a VBI anti-copy determination unit 17.

The video decoding unit 11 mentioned above is used to decode the display data and vertical blanking interval data of the video signal to generate image data and VBI data of a digital video signal.

The VBI capturing unit 12 is used to receive the digital video signal, and generate a VBI raw data (VBI Raw Data) after capturing the VBI data, one end of which is connected to the video decoding unit 11 .

The 3D de-interlacing module 13 is coupled to the video decoding unit 11 and includes a memory control unit 131 and a dynamic de-interlacing unit 132 for receiving and controlling the storage/reading operation of the image data, and according to each video The field is calculated, and the image data is converted from interlaced to progressive and then output.

The memory unit 14 is coupled to the memory control unit 131 of the 3D de-interlacing module 13 for providing the 3D de-interlacing module 13 to store/read continuous video fields of the image data.

The bridge unit 15 is coupled to the 3D de-interlacing module 13 and the VBI capture unit 12, and is used to receive the de-interlaced image data and the VBI original data, convert them to conform to a bus interface specification, and then pass the corresponding A bus interface 16 of the bus interface specification is output to a host computer 2, through which image data can be used to display progressive scan images on a display screen 21, and at the same time perform subsequent software compression and video recording operations, wherein the The bus interface specification is USB.

The VBI anti-copy judging unit 17 is integrated in the host computer 2, and is used to receive the original VBI data and judge whether it is marked as anti-copy information by the software in the host computer 2, wherein whether the original VBI data is marked as anti-copy The method of copying information is to use computer software to convert the received VBI digital data into transmission bytes (bits) corresponding to each VBI line, and then decode these bytes into closed caption characters according to VBI specifications ( Closed Caption Character) or data packet (Data Packet). If the data decoded by VBI is subtitle data, it can be used to integrate these subtitle data into image data and display it on the screen. If it is copy-proof data, it can be used to judge the result , forcibly restricting the subsequent execution of software compression and video recording operations. As mentioned above, a brand new image processing device with 3D de-interlacing is formed.

The video field output by the above-mentioned video decoding unit 11 is shown in FIG. 2 , and the digital video signal includes image data and VBI data. For the data that can be carried in the VBI interval, in the NTSC standard, 10-21 lines are used for data transmission; in the APL standard, 6-23 lines are used for data transmission. The output image data includes a predetermined number of pieces of data, including the Nth and N+1th video fields. Wherein, the VBI data is directly captured by the VBI capture unit 12 to generate the VBI original data, and the image data is received by the 3D de-interlacing module 13 and processed as follows.

When in use, if you want to play the interlaced video progressively, you need to de-interlace the interlaced pictures, and then play a complete picture at a time. As shown in FIG. 3 , receiving the continuous video fields of the video data output by the video decoding unit 11, including the Nth and N+1th video fields, and the 3D deinterlacing module 13 is configured by the memory control unit 131 The initial memory address, after waiting for the image data to be interleaved to be temporarily stored in several memory locations in the memory unit 14, the memory control unit 131 can be started, for example, according to the N+1th video field, The Nth video field is read from the memory unit 14 so as to be sent to the dynamic de-interleaving unit 132 for de-interlacing processing, wherein the N is an integer greater than or equal to 1.

When operating, the motion de-interlacing unit 132 can be a motion detector, which receives continuous video fields of the image data, and judges whether each video field in the image data is dynamic or static, so as to perform a motion detection correspondingly The algorithm is used to output the dynamic image data which has been de-interlaced. Among them, according to the image data, the inter-field interpolation method is used for the static part, which can obtain a complete resolution in the vertical direction, and the dynamic part uses the intra-field interpolation method to avoid phenomena such as aliasing and ghosting.

In addition, the motion de-interlacing unit 132 can also be a motion compensator, which receives continuous video fields of the image data, and calculates a motion vector (Motion Vector) of each video field in the image data according to a motion estimation algorithm, so that the previous A video field and the motion vector reconstruct a new video field, and combine the two video fields, so as to output a de-interlaced motion image data.

Therefore, the present invention utilizes hardware to provide faster deinterlace (Deinterlace) speed and better picture quality. When used with a host computer, since the host computer does not need to perform de-interleaving, the resources of the host computer can be saved, thereby reducing the burden on the host computer. In addition, the anti-copy judgment software integrated in the host computer can also be used to judge whether it is marked as anti-copy information, so as to forcibly restrict the operation of subsequent software compression and video recording according to the judgment results, so it can be solved only by software. Whether copy protection is required, thereby reducing the expenditure on additional hardware to greatly reduce costs.

To sum up, the image processing device with 3D deinterlacing of the present invention can effectively improve various shortcomings of the prior art, and uses hardware to provide faster deinterlace (Deinterlace) speed and better picture quality. When a host computer is used together, the resources of the host computer can be saved and its burden can be reduced. The anti-copy judgment software integrated in the host computer can also be used to determine whether copy protection is required, thereby reducing the expenditure on additional hardware and greatly reducing the cost.

Claims (5)

1. the image processor of a tool 3D deinterleave, this device comprises bridge-jointing unit and bus interface; It is characterized in that: also comprise video decoding unit, VBI acquisition unit, 3D deinterleave module, internal storage location, and VBI is anti-copies identifying unit, this video decoding unit is connected with this VBI acquisition unit; This 3D deinterleave module is coupled to this video decoding unit, includes memory control unit and dynamic interleaving removal unit; This internal storage location is coupled to this 3D deinterleave module; This bridge-jointing unit is coupled to this 3D deinterleave module and this VBI acquisition unit, and exports in the main frame through bus interface; This VBI prevents that copying identifying unit is integrated in this main frame, and is connected with this bus interface.

2. the image processor of tool 3D deinterleave as claimed in claim 1 is characterized in that: described bus interface specification is USB.

3. the image processor of tool 3D deinterleave as claimed in claim 1 is characterized in that: described dynamic interleaving removal unit is a dynamic detection device.

4. the image processor of tool 3D deinterleave as claimed in claim 1 is characterized in that: described dynamic interleaving removal unit is a dynamic compensator.

5. the image processor of tool 3D deinterleave as claimed in claim 1 is characterized in that: described internal storage location is coupled to the memory control unit of this 3D deinterleave module.

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