CN115209145A - Video compression method, system, device and readable storage medium - Google Patents

Abstract

The application discloses a video compression method, a system, a device and a readable storage medium, and relates to the field of data processing. When video data similar to the target video data of the first target position in the current frame video data exists in the area to be compared corresponding to the first target position in the previous frame video data, the similar video data is used for generating repeated mark information, so that the target video data is not converted and video compressed according to the second target position and the repeated mark information, the video display device can directly call the video data of the second target position as the target video data to be displayed, and when the change of a video picture at a server host side is small or the video picture is not changed, the data amount of format conversion, video compression and transmission can be greatly reduced, and further the processing amount and the power consumption of a substrate management control chip are reduced.

Description

A video compression method, system, device and readable storage medium

technical field

The present application relates to the field of data processing, and in particular, to a video compression method, system, device and readable storage medium.

Background technique

Please refer to FIG. 1 , which is a structural block diagram of a video compression in the prior art. The video processing flow in the traditional baseboard management control chip is as follows: after the video data on the server host side is transmitted to the VGA (Video Graphics Array, video graphics array) of the baseboard management control chip for processing, RGB (red-green-blue, red- green-blue) format, convert the original RGB format video data into YUV format video data through the color space conversion module (RGB2YUV), and then store the YUV format video data in FIFO (First Input First Output, First-in, first-out queue)), according to the compression format requirements of the subsequent compression module, input it to the compression module for compression in the order of BLOCK, and after the compression is completed, write the data to the storage module, EMAC (Ethernet Access Controller, Ethernet control) drive to read the compressed data in the storage module to transmit the video to the video display device for remote display.

However, in the application scenario of the baseboard management control chip, there is a high possibility that the video image on the server host side changes very little or the video image does not change (especially in the monitoring scenario). , the color space conversion and video compression processing will still be performed on the video data that does not change or changes very little. At this time, it is equivalent to processing a lot of repeated data, resulting in a large processing capacity of the baseboard management control chip and a relatively high power consumption. big.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a video compression method, system, device and readable storage medium, which can greatly reduce the data for format conversion, compression and transmission when the change of the video picture on the server host side is small or the video picture does not change. Therefore, the processing capacity and power consumption of the baseboard management control chip are reduced.

In order to solve the above-mentioned technical problems, the present application provides a video compression method, including:

Receive block video data of the current frame;

Determine the to-be-compared area corresponding to the first target position in the block video data of the previous frame corresponding to the block video data of the current frame according to the first target position of the target video data in the block video data of the current frame;

Determine whether there is video data similar to the target video data in the video data of the area to be compared;

If it exists, obtain the second target position of the video data similar to the target video data in the video data of the previous frame, and generate repetition mark information, so that the second target position and the repetition mark information are incorrect The target video data is converted and video compressed;

Sending the second target position and the repetition flag information to a video display device, so that the video display device calls and displays the video data of the second target position as target video data.

Preferably, the block video data of the previous frame corresponding to the block video data of the current frame is determined according to the first target position of the target video data in the block video data of the current frame, which corresponds to the first target position to be compared area, including:

determining the block video data of the previous frame corresponding to the block video data of the current frame;

A region within a preset range centered on the first target position in the block video data of the previous frame is divided into regions to be compared.

Preferably, the target video data is a target pixel;

Divide an area within a preset range centered on the first target position in the block video data of the previous frame into an area to be compared, including:

Divide the area formed by the rice-shaped structure or the N*N palace lattice structure centered on the first target position in the block video data of the previous frame as the area to be compared;

The number of pixel points through which the first target position is connected to any edge of the area to be compared does not exceed a preset number, and N is an integer not less than 3.

Preferably, after dividing the area formed by the rice-shaped structure or the N*N grid structure centered on the first target position in the block video data of the previous frame into the area to be compared, the method further includes:

Set a one-to-one corresponding coordinate for each pixel in the area to be compared;

Obtaining the second target position of video data similar to the target video data in the video data of the previous frame, including:

The coordinates of the pixels similar to the target pixel in the video data of the previous frame are obtained.

Preferably, the coordinates include abscissa and ordinate.

Preferably, after determining whether there is video data similar to the target video data in the video data of the area to be compared, the method further includes:

If it does not exist, then perform color space conversion on the block video data of the current frame to convert the block video data of the current frame from RGB format to YUV format;

The block video data of the current frame of the YUV format is compressed to obtain the compressed video data of the current frame;

Sending the compressed video data of the current frame to the video display device to display a corresponding video picture.

Preferably, the block video data of the current frame is 16*16 block video data.

Preferably, the block video data of the current frame in the YUV format is compressed to obtain the compressed video data of the current frame, including:

In YUV420 mode, the 16*16 Y component is first received and compressed, and the 8*8 U component and the 8*8 V component are cached;

After the compression of the 16*16 Y component is completed, the 8*8 U component and the 8*8 V component are sequentially received and sequentially compressed.

Preferably, the block video data of the current frame in the YUV format is compressed to obtain the compressed video data of the current frame, including:

In YUV422 mode, the 16*16 Y component is first received and compressed, and the 16*8 U component and the 16*8 V component are cached;

After the compression of the 16*16 Y component is completed, the 16*8 U component and the 16*8 V component are sequentially received and sequentially compressed.

Preferably, the block video data of the current frame in the YUV format is compressed to obtain the compressed video data of the current frame, including:

In YUV444 mode, the first group of 8*8 Y components is received and compressed, and the second group of 8*8 Y components, 16*16 U components and 16*16 V components are cached;

After the compression of the Y component of the first group of 8*8 is completed, the U component of the first group of 8*8, the V component of the first group of 8*8, the Y component of the second group of 8*8, The U component of the second group of 8*8 and the V component of the second group of 8*8 are compressed in sequence.

Preferably, determining whether video data similar to the target video data exists in the video data of the area to be compared includes:

Calculate the similarity between each video data in the to-be-compared area and the target video data;

determining whether each of the calculated similarities has a similarity greater than a similarity threshold;

If it exists, determine that the video data with the similarity greater than the similarity threshold is similar to the target video data, and enter the first step of obtaining the video data similar to the target video data in the video data of the previous frame. 2. the steps of the target location;

If not, it is determined that there is no video data similar to the target video data in the to-be-compared area.

Preferably, the target video data is a target pixel; calculating the similarity between each video data in the to-be-compared area and the target video data, including:

Calculate the similarity between each pixel in the to-be-compared area and the target pixel.

In order to solve the above-mentioned technical problems, the present application also provides a video compression system, including:

a video data receiving unit for receiving the block video data of the current frame;

A region determination unit, configured to determine the block video data of the previous frame corresponding to the block video data of the current frame according to the first target position of the target video data in the block video data of the current frame, which corresponds to the first target position the area to be compared;

a similar data determination unit, configured to determine whether there is video data similar to the target video data in the video data of the area to be compared;

A position determination unit, configured to obtain video data similar to the target video data in the video data of the previous frame when there is video data similar to the target video data in the video data of the area to be compared the second target position, and generate repetition mark information, to not carry out conversion and video compression to the target video data according to the second target position and the repetition mark information;

A data sending unit, configured to send the second target position and the repetition flag information to a video display device, so that the video display device calls the video data of the second target position as target video data and displays it.

In order to solve the above-mentioned technical problems, the present application also provides a video compression device, including:

memory for storing computer programs;

The processor is configured to implement the steps of the above-mentioned video compression method when the computer program is stored.

In order to solve the above technical problems, the present application also provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the video compression method as described above is implemented A step of.

The present application provides a video compression method, which relates to the field of data processing. In this scheme, when there is video data similar to the target video data of the first target position in the video data of the current frame in the to-be-compared area corresponding to the first target position in the video data of the previous frame, the similar video data is set to the second target position. position and generate repeating mark information, so as not to convert and compress the target video data according to the second target position and the repeating mark information, the video display device can directly call the video data of the second target position to display as the target video data, When the change of the video picture on the server host side is small or the video picture does not change, the data volume of format conversion, video compression and transmission can be greatly reduced, thereby reducing the processing volume and power consumption of the baseboard management control chip.

The present application also provides a video compression system, device and readable storage medium, which have the same beneficial effects as the video compression method described above.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the prior art and the accompanying drawings required in the embodiments. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a structural block diagram of a video compression in the prior art;

Fig. 2 is the decomposition schematic diagram of a kind of block video data in the prior art;

3 is a schematic flowchart of a video compression method provided by the application;

4 is a system block diagram of a video compression provided by the application;

5 is a schematic diagram of a region to be compared provided by the present application;

Fig. 6 is the decomposition schematic diagram of a kind of RGB video data provided by this application;

7 is a structural block diagram of a video compression system provided by the application;

FIG. 8 is a structural block diagram of a video compression apparatus provided by the present application.

Detailed ways

The core of this application is to provide a video compression method, system, device and readable storage medium, which can greatly reduce the data for format conversion, compression and transmission when the change of the video picture on the server host side is small or the video picture does not change. Therefore, the processing capacity and power consumption of the baseboard management control chip are reduced.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

First, the specific manner of transmitting video data in the BLOCK mode in the prior art is described: for details, please refer to FIG. 2 , which is a schematic exploded view of a block video data in the prior art. Among them, each small box on the right side in Figure 2 represents 8*8 pixels on the left side in Figure 2, the large box on the right side in Figure 2 represents 16*16 pixels, and the long box is 8*16 pixels . Cb is the U component, and Cr is the V component.

Taking YUV420 as an example, the Y block represents the Y component of four 8*8 pixels, the Cb block represents the U component of one 8*8 block, and the Cr block represents the V component of one 8*8 block.

The detailed video data processing flow is: VGA writes the original video data into the address space of DDR (Double Rate Synchronous Dynamic Random Access Memory), for example, set the space from address 0x1000_0000 to 0x2000_0000, and then write the pointer after writing to the tail space. Then start writing again from 0x1000_0000. The post-stage should read the original video data written in the DDR in time to avoid the original video data in the address space of the DDR from being overwritten without being read. Then the color space conversion module performs color space conversion to convert the original video data from RGB format to YUV format. Then, the Y, U, V data are buffered (buffered to FIFO) with on-chip storage resources. According to the requirements of BLOCK format conversion, a FIFO array composed of 16 Y_FIFOs, 16 U_FIFOs, and 16 V_FIFOs is required. In the prior art , BLOCK_CONVERT (BLOCK conversion module) receives the control information of the read data sent by the video compression module. It is worth noting that the BLOCK conversion module does not care about the read address sent by the video compression module, but the BLOCK conversion module itself generates read and write control logic.

Specifically, the YUV write logic is: in YUV420 mode, (retain all Y data, retain U/V data in even rows and even columns);

Write the Y data of row 0/16/32/48... into Y_FIFO_0;

Write the Y data of line 1/17/33/49... into Y_FIFO_1;

Write the Y data of line 2/18/34/50... into Y_FIFO_2;

...

The Y data of line 15/31/47/63... is written into Y_FIFO_15.

Write the even column U data of row 0/16/32/48... into U_FIFO_0;

Write the even column U data of row 2/18/34/50... into U_FIFO_1;

...

Write even column U data of row 14/30/46/62... into U_FIFO_7.

Write the even column U data of row 0/16/32/48... into V_FIFO_0;

Write the even column U data of row 2/18/34/50... into V_FIFO_1;

...

Write even column U data of row 14/30/46/62... into V_FIFO_7.

In YUV422 mode, (retain all Y data, retain U/V data of even columns);

Write the Y data of row 0/16/32/48... into Y_FIFO_0;

Write the Y data of line 1/17/33/49... into Y_FIFO_1;

Write the Y data of line 2/18/34/50... into Y_FIFO_2;

...

Write the Y data of lines 15/31/47/63... into Y_FIFO_15.

Write the even column U data of row 0/16/32/48... into U_FIFO_0;

Write the even column U data of row 1/17/33/49... into U_FIFO_1;

Write the even column U data of row 2/18/34/50... into U_FIFO_2;

...

Write the U data of the 15/31/47/63... rows and even columns into U_FIFO_15.

Write the even column V data of row 0/16/32/48... into V_FIFO_0;

Write the even column V data of row 1/17/33/49... into V_FIFO_1;

Write the even column V data of row 2/18/34/50... into V_FIFO_2;

...

Write the V data of the 15/31/47/63... rows and even columns into V_FIFO_15.

In YUV444 mode, (retain Y/U/V data of all rows and all columns);

Write the Y data of row 0/8/16/24... into Y_FIFO_0;

Write the Y data of row 1/9/17/25... into Y_FIFO_1;

Write the Y data of line 2/10/18/26... into Y_FIFO_2;

...

Write the Y data of lines 7/15/23/31... into Y_FIFO_7.

Write the U data of row 0/8/16/24... into U_FIFO_0;

Write the U data of lines 1/9/17/25... into U_FIFO_1;

Write the U data of line 2/10/18/26... into U_FIFO_2;

...

Write the U data of lines 7/15/23/31... into U_FIFO_7.

Write the V data of row 0/8/16/24... into V_FIFO_0;

Write the V data of row 1/9/17/25... into V_FIFO_1;

Write the V data of row 2/10/18/26... into V_FIFO_2;

...

Write the V data of lines 7/15/23/31... into V_FIFO_7.

Specifically, the YUV read logic is: in YUV420 mode, the FIFO queue does not care about the read address issued by the video compression module, but only cares about the read enable issued by the video compression module, and reads Y_FIFO_0 16 times, Y_FIFO_1 16 times...16 Times Y_FIFO_15. 8 times U_FIFO_0, 8 times U_FIFO_1, 8 times U_FIFO_7, 8 times V_FIFO_0, 8 times V_FIFO_1, 8 times V_FIFO_7, and then cycle in turn.

In YUV422 mode, the FIFO queue does not care about the read address issued by the video compression module, but only cares about the read enable issued by the video compression module, and reads Y_FIFO_0, 16 times, Y_FIFO_1, 16 times, Y_FIFO_15, 8 times, U_FIFO_0, 8 in turn. Times U_FIFO_1, ... 8 times U_FIFO_15, 8 times V_FIFO_0, 8 times V_FIFO_1, ... 8 times V_FIFO_15.

In YUV444 mode, the FIFO queue does not care about the read address issued by the video compression module, but only cares about the read enable issued by the video compression module, and reads Y_FIFO_0, 8 Y_FIFO_1...8 times Y_FIFO_7 in turn. 8 times U_FIFO_0, 8 U_FIFO_1 times, 8 times U_FIFO_7, 8 times V_FIFO_0, 8 times V_FIFO_1, 8 times V_FIFO_7.

It can be seen that there is a high possibility that the video picture on the server host side changes very little or the video picture does not change (especially in the monitoring scenario). All the very small video data is processed by color space conversion and video compression, which is equivalent to processing a lot of repeated data, resulting in a large processing capacity and high power consumption of the baseboard management control chip.

Please refer to FIG. 3 and FIG. 4. FIG. 3 is a schematic flowchart of a video compression method provided by the application, and FIG. 4 is a system block diagram of a video compression provided by the application. The method includes:

S31: Receive block video data of the current frame;

S32: Determine the area to be compared corresponding to the first target position in the block video data of the previous frame corresponding to the block video data of the current frame according to the first target position of the target video data in the block video data of the current frame;

It is necessary to judge whether the pictures corresponding to the block video data of the current frame and the block video data of the previous frame are exactly the same, or whether the changes of the pictures are small. Therefore, in the present application, when the block video data of the current frame is received, it is necessary to first determine the first target position corresponding to the target video data in the block video data of the current frame to be compared, and then determine the previous frame according to the first target position. The to-be-compared area corresponding to the first target position in the block video data of , to compare the block video data of the current frame with the block video data of the previous frame.

It should be noted that, in this application, the target video data corresponding to the first target position in the block video data of the current frame is not directly compared with the video data in the first target position of the block video data of the previous frame, and It is to compare the target video data corresponding to the first target position in the block video data of the current frame with the video data of the region to be compared corresponding to the first target position in the block video data of the previous frame, and its purpose is: not only to judge Whether the video picture of the current frame is the same as the video picture of the previous frame is also judged whether they are similar, so that the amount of data for converting and compressing the video data can be further reduced and the processing amount of the chip can be reduced.

As a preferred embodiment, the block video data of the previous frame corresponding to the block video data of the current frame is determined according to the first target position of the target video data in the block video data of the current frame, which corresponds to the first target position. Compare areas, including:

Determine the block video data of the previous frame corresponding to the block video data of the current frame;

A region within a preset range centered on the first target position in the block video data of the previous frame is divided into regions to be compared.

This embodiment aims to limit a specific implementation manner of determining the area to be compared. Specifically, considering that the change of the video picture is small, the change is usually only performed within a certain range. For example, the monitoring picture changes slightly due to camera shake. etc. At this time, the video data similar to or the same as the target video data is usually in a certain area centered on the first target position.

Therefore, in the present application, an area within a preset range centered on the first target position in the block video data of the previous frame is divided into an area to be compared.

Wherein, the area to be compared may be a range centered on the first target position and a radius of a preset length, or may be a range centered on the first target position and including a preset number of pixels, etc. This is not limited.

As a preferred embodiment, the target video data is a target pixel;

Divide the area within the preset range centered on the first target position in the block video data of the previous frame into the area to be compared, including:

In the block video data of the previous frame, the area formed by the rice-shaped structure or the N*N palace lattice structure centered on the first target position is divided into the area to be compared;

The number of pixels passing through the connection between the first target position and any edge of the area to be compared does not exceed the preset number, and N is an integer not less than 3.

This embodiment aims to limit the specific implementation of the area to be compared. Specifically, when the target video data is the target pixel point, the area to be compared in this application may be formed of a rice-shaped structure centered on the first target position. area, or an area composed of an N*N grid structure centered on the first target position. In a specific embodiment, the to-be-compared area includes 9 pixel points, and is centered on the target pixel point. For details, please refer to FIG. 5 , which is a schematic diagram of a region to be compared provided by the present application.

S33: determine whether there is video data similar to the target video data in the video data of the area to be compared;

S34: if there is, then obtain the second target position of the video data similar to the target video data in the video data of the previous frame so as not to convert the target video data and compress the video according to the second target position and the repetition mark information;

Specifically, after determining the area to be compared, it is determined whether the video data in the area to be compared has video data similar to the target video data, and if so, it means that the video data of the current frame corresponds to the video data of the previous frame. The same or the screen changes less. Specifically, when the video data of the first target position of the current frame is the same as the video data of the first target position of the previous frame, it means that the video pictures of the two frames are the same, that is, the video pictures have not changed. When the video data of the first target position of the current frame is similar to the video data of other positions except the first target position in the to-be-compared area of the previous frame, it indicates that the video pictures of the two frames are similar, that is, the video picture occurs. changes are small.

Specifically, when there is video data similar to the video data of the first target position in the video data in the above-mentioned area to be compared, obtain the second target position of the similar video data, so that the current frame of video data for processing.

As a preferred embodiment, after dividing the area formed by the m-shaped structure or the N*N grid structure centered on the first target position in the block video data of the previous frame into the area to be compared, it also includes:

Set one-to-one corresponding coordinates for each pixel in the area to be compared;

Obtain the second target position of video data similar to the target video data in the video data of the previous frame, including:

Get the coordinates of the pixels similar to the target pixel in the video data of the previous frame.

Specifically, when the above-mentioned target video data is the target pixel point and the area to be compared is an area formed by a m-shaped structure or an N*N grid structure centered on the first target position, the area to be compared includes several The first target position is the center pixel. At this time, in this application, a one-to-one correspondence is set for each pixel in the area to be compared. For details, please refer to Figure 5. In Figure 5, the coordinates of the target pixel are (1, 1), and the adjacent pixels As the region to be compared, it is specifically represented as (0,0) to (2,2) in FIG. 5 .

As a preferred embodiment, the coordinates include abscissa and ordinate. At this time, the specific method of obtaining the second target position of the video data similar to the target video data in the video data of the previous frame is: obtaining the coordinates of the video data similar to the target video data in the to-be-compared area (which may specifically be as abscissa and ordinate).

As a preferred embodiment, determining whether there is video data similar to the target video data in the video data of the area to be compared includes:

Calculate the similarity of each video data in the area to be compared and the target video data;

Determine whether each calculated similarity has a similarity greater than a similarity threshold;

If there is, then determine that the video data whose similarity is greater than the similarity threshold is similar to the target video data, and enter the step of obtaining the second target position of the video data similar to the target video data in the video data of the previous frame;

If not, it is determined that there is no video data similar to the target video data in the area to be compared.

Specifically, the present application aims to define a specific implementation manner of determining whether there is video data similar to the target video data in the video data of the area to be compared. First, the similarity between each video data in the area to be compared and the target video data is calculated, and when there is a similarity greater than the similarity threshold in each similarity, it is determined that the corresponding video data of the two are similar. At this time, the obtained similarity is greater than The second target position of the video data corresponding to the similarity threshold, so that the video data can be subsequently processed based on the second target position.

As a preferred embodiment, the target video data is the target pixel point; calculating the similarity between each video data in the area to be compared and the target video data, including:

Calculate the similarity between each pixel in the area to be compared and the target pixel.

Specifically, the specific method for calculating the similarity in this application is: calculating the similarity between the pixel value of each pixel point in the area to be compared and the pixel value of the target pixel point. Specifically, the similarity threshold may be, but not limited to, 90%.

S15: Send the second target position and the repetition flag information to the video display device, so that the video display device calls the video data of the second target position as the target video data and displays it.

After the above-mentioned acquisition of the second target position corresponding to the similar video data, the repetition mark information is also generated, and the second target position and the repetition mark information are sent to the video display device, wherein the format of the repetition mark information and the second target position It can be 32 bits, which can be specifically: {16'HFFFFFFFF, 8'Hx, 8'Hy}, where 16'HFFFFFFFF is the repetition flag information, 8'Hx is the abscissa of the second target position, and 8'Hx is The ordinate of the second target position. Specifically, the second target position is (0, 0), (2, 1) and the like in FIG. 5 . At this time, the video data marked as similar will no longer undergo the steps of color space conversion and video compression, but will be directly cached from the compression result of the previous frame according to the position information of the second target position in the cache corresponding to the video compression. to obtain compressed data. The video display device can also directly retrieve the video data corresponding to the second target position from the display image of the previous frame, and directly display it.

With the method in this application, in the case of the same video picture or small changes, the workload of performing color space conversion and video compression processing on video data can be reduced. Instead of repeating the flag information and the second destination position, the amount of data transferred is also reduced by comparison.

On the basis of the above-mentioned embodiment:

As a preferred embodiment, after determining whether there is video data similar to the target video data in the video data of the area to be compared, the method further includes:

If it does not exist, then perform color space conversion on the block video data of the current frame to convert the block video data of the current frame from RGB format to YUV format;

Compress the block video data of the current frame in the YUV format to obtain the compressed video data of the current frame;

Send the compressed video data of the current frame to the video display device to display the corresponding video picture.

Specifically, when it is determined that there is no video data similar to the target video data in the video data in the area to be compared, it is determined that the block video data of the current frame is neither the same nor similar to the block video data of the previous frame, that is, The corresponding video images are completely different or vary greatly. At this time, the normal processing flow is performed on the block video data of the current frame. Specifically, the color space conversion process is performed on the block video data of the current frame to convert it from the RGB format to the YUV format, and then the block video data of the current frame in the YUV format is compressed to obtain the compressed video of the current frame. data, and can store the compressed video data of the current frame, specifically, it can be stored in the storage module in Figure 4. When the video display device needs to display it, the storage module is read, and it is transmitted through EMAC to A video display device to display a corresponding video picture.

In addition, it should also be noted that the block video data of the current frame and the block video data of the previous frame described above are both RGB video data. In the process of video data transmission, the block video data of the current frame is stored in the RGBFIFO queue in FIG. 4, the block video data of the previous frame is stored in the RGB buffer in FIG. 4, and the comparison modules in FIG. The RGB FIFO queue and the RGB buffer are read to obtain the block video data of the current frame and the block video data of the previous frame, and then compare the block video data of the two frames.

As a preferred embodiment, the block video data of the current frame is 16*16 block video data.

Specifically, the block video data of the current frame in this application is 16*16 block video data. That is to say, the RGB original block data is read according to the size of 16*16. For different compression formats (YUV444/YUV422/YUV420), video compression has different requirements for block video data in YUV format. /U/V component video data is buffered.

Please refer to FIG. 6 , which is a schematic exploded view of RGB video data provided by the present application. The 16*16 block video data is decomposed into Y component, U component and V component, and the Y component, U component and V component are divided into 4 parts respectively, and the size of each part is 8*8.

As a preferred embodiment, the block video data of the current frame in the YUV format is compressed to obtain the compressed video data of the current frame, including:

In YUV420 mode, the 16*16 Y component is first received and compressed, and the 8*8 U component and the 8*8 V component are cached;

After the compression of the 16*16 Y component is completed, the 8*8 U component and the 8*8 V component are sequentially received and compressed in sequence.

Specifically, each virtual module in FIG. 4 is used as the execution subject for description, that is: when the video compression module is in the YUV420 mode, the 16*16 Y component is first sent to the video compression module, and the 8*8 U component is sent to the video compression module. The component is stored in the U component buffer module and the 8*8 V component is stored in the V component buffer module; after the 16*16 Y component is sent, the 8*8 U component and the 8*8 V component are sent to the video in turn Compression module.

Specifically, in the YUV420 compression format: after the block video data of the current frame is subjected to color space conversion, the 16*16 Y component is first transmitted to the video compression module of the subsequent stage. At the same time, only the U/V components of even-numbered rows and even-numbered columns are retained, and U_BUFFER (U component buffer module) and V_BUFFER (V component buffer module) are used for buffering respectively. After the transmission of the Y component is completed, the U component (8*8) is passed to the video compression module of the subsequent stage, and the V component (8*8) is passed to the video compression module of the subsequent stage.

As a preferred embodiment, the block video data of the current frame in the YUV format is compressed to obtain the compressed video data of the current frame, including:

In YUV422 mode, the 16*16 Y component is first received and compressed, and the 16*8 U component and the 16*8 V component are cached;

After the compression of the 16*16 Y component is completed, the 16*8 U component and the 16*8 V component are sequentially received and compressed in sequence.

Specifically, each virtual module in FIG. 4 is used as the execution subject for description, that is: when the video compression module is in the YUV422 mode, the 16*16 Y component is first sent to the video compression module, and the 16*8 U component is sent to the video compression module. The component is stored in the U component buffer module and the 16*8 V component is stored in the V component buffer module; after the 16*16 Y component is sent, the 16*8 U component and the 16*8 V component are sent to the video in turn Compression module.

Specifically, in the YUV422 compression format: after the block video data of the current frame has undergone color space conversion, the 16*16 Y component is first transmitted to the video compression module of the subsequent stage. At the same time, only the U/V components of the even-numbered columns are retained, and U_BUFFER (U component buffer module) and V_BUFFER (V component buffer module) are used for buffering respectively. After the transmission of the Y component is completed, the U component (16*8) is passed to the video compression module of the subsequent stage, and the V component (16*8) is passed to the video compression module of the subsequent stage.

As a preferred embodiment, the block video data of the current frame in the YUV format is compressed to obtain the compressed video data of the current frame, including:

In YUV444 mode, the first group of 8*8 Y components is received and compressed, and the second group of 8*8 Y components, 16*16 U components and 16*16 V components are cached;

After the compression of the Y component of the first group of 8*8 is completed, the U component of the first group of 8*8, the V component of the first group of 8*8, the Y component of the second group of 8*8, The U component of the second group of 8*8 and the V component of the second group of 8*8 are compressed in sequence.

Specifically, each virtual module in FIG. 4 is used as the execution subject for description, that is: when the video compression module is in the YUV444 mode, the first group of 8*8 Y components is first sent to the video compression module, and the second The Y component of group 8*8 is stored in the Y component buffer module, the U component of 16*16 is stored in the U component buffer module, and the V component of 16*16 is stored in the V component buffer module;

After the Y component of the first group of 8*8 is sent, the U component of the first group of 8*8, the V component of the first group of 8*8, the Y component of the second group of 8*8, the second group of 8 *8 U component and second group 8*8 V component send video compression module.

Specifically, in the YUV444 compression format: after the block video data (16*16) of the current frame undergoes color space conversion, the first group of 8*8 Y components are first passed to the video compression module of the subsequent stage. At the same time, the Y/U/V components of all rows and columns are retained and buffered with Y_BUFFER/U_BUFFER and V_BUFFER respectively. After the transmission of the first set of Y components is completed, the first set of U components (8*8) are passed to the video compression module of the subsequent stage and the first set of V components (8*8) are passed to the video compression module of the subsequent stage. Then pass the Y/U/V components of the 2/3/4 groups in turn.

In summary, through the video compression method in the present application, when the change of the video picture on the server host side is small or the video picture does not change, the data volume of format conversion, compression and transmission can be greatly reduced, thereby reducing the baseboard management control. The processing capacity and power consumption of the chip.

In order to solve the above-mentioned technical problems, the application also provides a video compression system, please refer to FIG. 7 , which is a structural block diagram of a video compression system provided by the application, and the system includes:

Video data receiving unit 71, for receiving the block video data of the current frame;

The area determination unit 72 is used for determining the block video data of the previous frame corresponding to the block video data of the current frame according to the first target position of the target video data in the block video data of the current frame to be compared with the first target position. area;

Similar data determination unit 73, for determining whether there is video data similar to the target video data in the video data of the area to be compared;

The position determination unit 74 is used to obtain the second target position of the video data similar to the target video data in the video data of the previous frame when there is video data similar to the target video data in the video data of the area to be compared, and generating repeating marker information, so as not to convert and compress the target video data according to the second target position and the repeating marker information;

The data sending unit 75 is configured to send the second target position and the repetition flag information to the video display device, so that the video display device calls the video data of the second target position as the target video data and displays it.

For the introduction of the video compression system, please refer to the above-mentioned embodiments, which will not be repeated in this application.

In order to solve the above technical problems, the present application also provides a video compression device. Please refer to FIG. 8 . FIG. 8 is a structural block diagram of the video compression device provided by the present application. The device includes:

memory 81 for storing computer programs;

The processor 82 is configured to implement the steps of the above-mentioned video compression method when the computer program is stored.

For the introduction of the video compression apparatus, please refer to the above-mentioned embodiments, which will not be repeated in this application.

To solve the above technical problems, the present application also provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and the computer program is executed by a processor to implement the steps of the above-mentioned video compression method. For the introduction of the computer-readable storage medium, please refer to the above-mentioned embodiments, which will not be repeated in this application.

It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article, or device that includes the element.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, this application is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (15)

1. A method of video compression, comprising:

receiving block video data of a current frame;

determining a region to be compared corresponding to a first target position in block video data of a previous frame corresponding to the block video data of the current frame according to the first target position of the target video data in the block video data of the current frame;

determining whether video data similar to the target video data exists in the video data of the area to be compared;

if the target video data exists, acquiring a second target position of the video data similar to the target video data in the video data of the previous frame, and generating repeated mark information so as not to convert and compress the target video data according to the second target position and the repeated mark information;

and sending the second target position and the repeated mark information to a video display device so that the video display device calls the video data of the second target position as target video data and displays the target video data.

2. The video compression method of claim 1, wherein determining the area to be compared corresponding to the first target position in the block video data of the previous frame corresponding to the block video data of the current frame according to the first target position of the target video data in the block video data of the current frame comprises:

determining the block video data of a previous frame corresponding to the block video data of a current frame;

and dividing an area in a preset range taking the first target position as the center in the block video data of the previous frame into areas to be compared.

3. The video compression method of claim 2, wherein the target video data is a target pixel point;

dividing an area within a preset range with the first target position as a center in the block video data of the previous frame into areas to be compared, including:

dividing a region formed by a rice-shaped structure or an N-x-N grid structure taking the first target position as the center in the block of video data of the previous frame into regions to be compared;

the number of pixel points which are connected and pass through between the first target position and any edge of the area to be compared is not more than a preset number, and N is an integer not less than 3.

4. The video compression method of claim 3, wherein after dividing a region, which is formed by a mi-shaped structure or an N x N grid structure centered on the first target position, in the block of video data of a previous frame into regions to be compared, further comprising:

setting one-to-one corresponding coordinates for each pixel point in the area to be compared;

acquiring a second target position of video data similar to the target video data in the video data of the previous frame, including:

and acquiring coordinates of pixels similar to the target pixel in the video data of the previous frame.

5. The video compression method of claim 4, wherein the coordinates comprise an abscissa and an ordinate.

6. The video compression method of claim 1, wherein after determining whether video data similar to the target video data exists in the video data of the area to be compared, further comprising:

if not, performing color space conversion on the block video data of the current frame to convert the block video data of the current frame from an RGB format to a YUV format;

compressing the block video data of the current frame in the YUV format to obtain compressed video data of the current frame;

and sending the compressed video data of the current frame to the video display device so as to display a corresponding video picture.

7. The video compression method of claim 6, wherein the block video data of the current frame is 16 x 16 block video data.

8. The video compression method of claim 7, wherein compressing the block video data of the current frame in YUV format to obtain the compressed video data of the current frame comprises:

in a YUV420 mode, receiving and compressing a 16-by-16Y component, and caching a U component of 8*8 and a V component of 8*8;

after the compression of the Y component of 16 × 16 is completed, the U component of 8*8 and the V component of 8*8 are sequentially received and sequentially compressed.

9. The video compression method of claim 7, wherein compressing the block video data of the current frame in YUV format to obtain the compressed video data of the current frame comprises:

in a YUV422 mode, receiving and compressing a 16X 16Y component, and caching a 16X 8U component and a 16X 8V component;

after the compression of the Y component of 16 × 16 is completed, the U component of 16 × 8 and the V component of 16 × 8 are sequentially received and sequentially compressed.

10. The video compression method of claim 7, wherein compressing the block video data of the current frame in YUV format to obtain the compressed video data of the current frame comprises:

in YUV444 mode, receiving and compressing Y component of 8*8 of first group, and buffering Y component, U component of 16 × 16 and V component of 16 × 16 of second group 8*8;

after the compression of the Y component of the first group 8*8 is completed, the U component of the first group 8*8, the V component of the first group 8*8, the Y component of the second group 8*8, the U component of the second group 8*8 and the V component of the second group 8*8 are sequentially received and sequentially compressed.

11. The video compression method according to any one of claims 1 to 10, wherein determining whether video data similar to the target video data exists in the video data of the area to be compared comprises:

calculating the similarity between each video data in the area to be compared and the target video data;

determining whether the calculated similarity exists or not;

if so, judging that the video data with the similarity degree larger than the similarity threshold is similar to the target video data, and acquiring a second target position of the video data similar to the target video data in the video data of the previous frame;

and if the target video data does not exist, judging that the video data similar to the target video data does not exist in the area to be compared.

12. The video compression method of claim 11, wherein the target video data is a target pixel point; calculating the similarity between each video data in the area to be compared and the target video data, including:

and calculating the similarity between each pixel point in the area to be compared and the target pixel point.

13. A video compression system, comprising:

a video data receiving unit for receiving block video data of a current frame;

the area determining unit is used for determining an area to be compared, corresponding to a first target position, in the block video data of the previous frame corresponding to the block video data of the current frame according to the first target position of the target video data in the block video data of the current frame;

a similar data determining unit, configured to determine whether video data similar to the target video data exists in the video data of the region to be compared;

a position determining unit, configured to, when video data similar to the target video data exists in the video data of the region to be compared, obtain a second target position in the video data of a previous frame of the video data similar to the target video data, and generate repeat flag information, so as not to perform conversion and video compression on the target video data according to the second target position and the repeat flag information;

and the data sending unit is used for sending the second target position and the repeated mark information to a video display device so that the video display device calls the video data of the second target position as target video data and displays the target video data.

14. A video compression apparatus, comprising:

a memory for storing a computer program;

processor for implementing the steps of the video compression method according to any one of claims 1 to 12 when storing a computer program.

15. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the video compression method according to any one of claims 1-12.

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