WO2020078327A1 - Encoding/decoding method and device - Google Patents

Abstract

The present application provides an encoding/decoding method and device. The encoding/decoding method comprises: an encoding device performs derivation on an encoding block to be encoded to obtain a derivative block; the encoding device encodes the derivative block using a skip encoding mode or a direct encoding mode to obtain first encoding information; the encoding device determines a code stream according to the first encoding information, wherein the code stream comprises indication information, and the indication information is used for indicating that the first encoding information is obtained by encoding the derivative block using the skip encoding mode or the direct encoding mode; a decoding device parses the code stream to obtain the indication information; the decoding device decodes the derivative block using the skip encoding mode or the direct encoding mode. The encoding/decoding method of the embodiments of the present application facilitates increasing encoding gain.

Description

Encoding and decoding method and device

This application requires the priority of the Chinese patent application filed on October 15, 2018 with the Chinese Patent Office, the application number is 201811198705.3, and the application name is "a codec method and device", the entire content of which is incorporated by reference in this application in.

Technical field

The present application relates to the field of communications, and more specifically, to a method and device for encoding and decoding.

Background technique

The Joint Video Expert Group (joint video exploration team, JVET) is developing a new generation of video encoding compression standard H.266 / universal video encoding (VVC). Audio and video coding standard 3 (audio video coding standard 3, AVS3) is developing a new generation of standards AVS3 is generally based on this framework structure. In the latest video coding standard H.266 / VVC draft standard 2.0 and AVS3 standard draft being developed, multiple coding tools are adopted, distributed in each module of prediction, transformation, quantization, loop filtering and entropy coding.

At present, the skip and direct encoding methods in AVS3 are not developed, and motion search is not performed, and only the motion vector (MV) is exported through the encoded surrounding blocks, among which skip encoding The residual information is not transmitted, and the residual information needs to be transmitted in the direct coding, and the skip coding and direct coding are only for the 2N × 2N mode, and the coding gain is low.

Summary of the invention

In view of this, the present application provides a codec method and device, with a view to improving coding gain.

In a first aspect, a coding method is provided. The method includes: an encoding device derives a derivative block according to an encoding block to be encoded; the encoding device uses a first encoding mode to encode the derivative block to obtain a first The first encoding mode of the encoding information includes a skip encoding mode or a direct encoding mode; the encoding device determines a code stream according to the first encoding information, and the code stream includes indication information, and the indication information is used to indicate the The first encoding information is obtained by encoding the derivative block or the sub-blocks of the derivative block using the skip encoding mode or the direct encoding mode.

In some possible implementations, the encoding device uses the first encoding mode to encode the derived block to obtain first encoding information, including:

When the preset condition is satisfied, the first encoding mode is adopted to encode the derivative block to obtain the first encoding information.

Specifically, in the embodiment of the present application, the preset condition may be one or more of the following:

(1) When the length and width of the derived block or its sub-blocks are less than or equal to the first value;

(2) When the length and width of the derived block or its sub-blocks are greater than or equal to the second value;

(3) Get some specific blocks in derivative mode.

In some possible implementation manners, the encoding device may encode the derivative block or its sub-blocks using the skip encoding mode or the direct encoding mode to obtain first encoding information, the derivative block and each of the derivative blocks The sub-blocks share the first encoded information.

In some possible implementations, when the size of the derived block is greater than the third value, the derived block is encoded in skip coding mode or direct encoding mode; when the size of the derived block is less than the fourth value, the A sub-block is coded in skip coding mode or direct coding mode; when the size of the derived block is smaller than the fifth value, the second sub-block is coded in skip coding mode or direct coding mode; wherein, the derived block includes The first sub-block and the second sub-block.

In the encoding method of the embodiment of the present application, the derived block or sub-block derived from the encoded block is encoded in the skip encoding mode or the direct encoding mode. Since the skip encoding mode or the direct encoding mode does not perform the motion search process, it can be At lower complexity, better coding gain and good quality are obtained.

With reference to the first aspect, in some possible implementation manners of the first aspect, the derivative block is composed of multiple sub-blocks, and the encoding device encodes the derivative block to obtain first encoding information, including: the encoding device uses In the first encoding mode, each of the plurality of sub-blocks is encoded separately to obtain a plurality of encoding information; the encoding device determines the first encoding information from the plurality of encoding information.

With reference to the first aspect, in some possible implementation manners of the first aspect, the encoding device determining the first encoding information from the plurality of encoding information includes: the encoding device determining the cost of the plurality of encoding information; the The encoding device determines the first encoded information according to the cost of the multiple encoded information.

In some possible implementations, the cost calculation method includes but is not limited to RDO, SAD, or SATD.

In some possible implementation manners, the first encoding information is the lowest-cost encoding information among the plurality of encoding information.

In the coding method of the embodiment of the present application, by using the skip coding mode or the direct coding mode to encode each sub-block in the derivative block derived from the coding block, and selecting the least expensive coding information therefrom, it can be at a lower complexity, Get better coding gain and good quality.

With reference to the first aspect, in some possible implementation manners of the first aspect, when the plurality of encoded information are the same, the first encoded information is any one of the encoded information.

With reference to the first aspect, in some possible implementation manners of the first aspect, when the plurality of encoded information are different, the first encoded information is the plurality of encoded information.

With reference to the first aspect, in some possible implementation manners of the first aspect, the indication information is also used to indicate that the encoding information of each sub-block in the plurality of sub-blocks is the same or different.

It should be understood that in the embodiment of the present application, the encoding device may encode each sub-block, or may encode a part of the sub-blocks in the derived block.

With reference to the first aspect, in some possible implementation manners of the first aspect, the derivative block is composed of multiple sub-blocks, and the encoding device encodes the derivative block to obtain first encoding information, including: the encoding device uses The first encoding mode encodes the derived block to obtain second encoding information; the encoding device uses the first encoding mode to encode each of the multiple sub-blocks separately to obtain multiple encoding information; The encoding device determines the first encoding information based on the second encoding information and the plurality of encoding information.

In the encoding method of the embodiment of the present application, the derivative block derived from the encoding block and each sub-block in the derivative block are encoded in skip encoding mode or direct encoding mode, respectively, and the one with the lower cost is determined as the first encoding Information, you can get better coding gain and good quality at lower complexity.

With reference to the first aspect, in some possible implementation manners of the first aspect, the encoding device determines the first encoding information according to the second encoding information and the third encoding information, including: the encoding device determines the second The cost of coding information and the cost of the plurality of coding information; the coding device determines the first coding information according to the cost of the second coding information and the cost of the plurality of coding information.

With reference to the first aspect, in some possible implementation manners of the first aspect, the indication information is further used to indicate that the first encoding information is the second encoding information or the plurality of encoding information.

In some possible implementations, if the cost of the second encoded information is less than the cost of the plurality of encoded information, the first encoded information is the second encoded information, if the cost of the second encoded information is greater than the multiple The cost of encoding information, then the first encoding information is the plurality of encoding information.

In a second aspect, a decoding method is provided. The method includes: a decoding device determining instruction information from a code stream, where the instruction information is used to instruct a derivative block to be encoded using a first encoding mode to obtain encoding information; The instruction information uses the first coding mode to decode the derived block.

In some possible implementation manners, the first coding mode includes a skip coding mode or a direct coding mode.

In some possible implementations, the derivative block is derived from the encoding block in the derivative mode.

With reference to the second aspect, in some possible implementation manners of the second aspect, the indication information is used to indicate that the encoding information is obtained by encoding the first sub-block using the first encoding mode, and the decoding device uses the first An encoding mode for decoding the derived block includes: the decoding device uses the first encoding mode to decode the first sub-block.

With reference to the second aspect, in some possible implementation manners of the second aspect, the derived block is composed of multiple sub-blocks, and the indication information is further used to indicate that the first coding mode is adopted for each of the multiple sub-blocks. The obtained encoding information is the same, and the decoding device decodes the derived block using the first encoding mode, including: the decoding device uses the first encoding mode to decode the second sub-block, and the second sub-block is the Any one of multiple sub-blocks.

With reference to the second aspect, in some possible implementation manners of the second aspect, the derived block is composed of multiple sub-blocks, and the indication information is further used to indicate that the first coding mode is adopted for each of the multiple sub-blocks. The obtained coding information is different. The decoding device uses the first coding mode to decode the derived block, including: the decoding device uses the first coding mode to decode each of the plurality of sub-blocks separately.

According to a third aspect, there is provided an encoding device including a module for performing the method in the first aspect or any implementation manner of the first aspect.

According to a fourth aspect, there is provided an encoding device including a module for executing the method in the second aspect or any implementation manner of the second aspect.

According to a fifth aspect, a decoding apparatus is provided, including: a nonvolatile memory and a processor coupled to each other, the processor calling program code stored in the memory to perform the first aspect or any of the first aspect Part or all of the steps of the method in an implementation.

According to a sixth aspect, a decoding apparatus is provided, including: a non-volatile memory and a processor coupled to each other, the processor calling program code stored in the memory to perform the second aspect or any of the second aspect Part or all of the steps of the method in an implementation.

According to a seventh aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores program code, wherein the program code includes any one of the implementation manners for executing the first aspect or the second aspect Instructions for some or all steps of the method.

According to an eighth aspect, a computer program product is provided that, when the computer program product runs on a computer, causes the computer to perform part or all of the steps of the method in any implementation manner of the first aspect or the second aspect Instructions.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the image encoding process.

FIG. 2 is a schematic diagram of a block division manner.

FIG. 3 is a schematic diagram of another block division manner.

FIG. 4 is a schematic diagram of the spatial position relationship of block E and its neighboring blocks.

FIG. 5 is a schematic flowchart of an encoding method provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of another block division manner.

7 is a schematic diagram of another block division manner.

FIG. 8 is a schematic flowchart of another encoding method provided by an embodiment of the present application.

9 is a schematic flowchart of another encoding method provided by an embodiment of the present application.

10 is a schematic flowchart of a decoding method provided by an embodiment of the present application.

11 is a schematic block diagram of an encoding device provided by an embodiment of the present application.

12 is a schematic block diagram of a decoding device provided by an embodiment of the present application.

13 is a schematic diagram of a video codec device according to an embodiment of the present application.

14 is a schematic block diagram of a video codec system according to an embodiment of the present application.

detailed description

The technical solutions in this application will be described below with reference to the drawings.

In order to better understand the technical solutions of the embodiments of the present application, the following first introduces the image encoding process involved in the embodiments of the present application.

Figure 1 is a schematic diagram of the image encoding process, which mainly includes intra prediction (inter prediction), inter prediction (transform), transform (quantization), entropy encoding (entropy encoding), in-loop filtering (in-loop filtering) and other links.

First, the image is divided into blocks, and intra-frame and inter-frame prediction are performed. After the residual is obtained, transform and quantization are performed. Finally, entropy coding is performed and the code stream is output. Here, the block is an M × N array composed of pixels (M is not necessarily equal to N), and the pixel value of each pixel position is known.

Intra prediction uses the pixel values of pixels in the reconstructed area in the current image to predict the pixel values of pixels in the current block according to the corresponding intra prediction mode.

Inter prediction is to find a matching reference block for the current coding block in the current image in the reconstructed image, and use the pixel value of the pixel in the reference block as the prediction information or prediction of the pixel value of the pixel in the current coding block Value (the information and value are no longer distinguished below) (this process is called motion estimation (ME)) (as shown in Figure 1), and the motion vector (motion vector (MV) (motion vector) pointing to the reference block needs to be transmitted The information indicates that the position of the reference block is shifted from that of the current block), and the indication information of the image where the reference block is located.

The motion estimation process needs to try multiple reference blocks in the reference image for the current block, and which one or several reference blocks are ultimately used for prediction is determined using rate-distortion optimization (RDO) or other methods.

After obtaining prediction information using intra or inter prediction, the pixel values of the pixels in the current coding block are subtracted from the corresponding prediction information to obtain residual information, and then discrete cosine transform (discrete cosine transformation (DCT) and discrete sine transform ( discrete discrete transform (DST) and other methods to transform the residual information, and then use quantized entropy coding to get the code stream. After the prediction signal plus the reconstructed residual signal, a further filtering operation is required to obtain a reconstructed signal, which is used as a reference signal for subsequent encoding.

Decoding is equivalent to the reverse process of encoding. As shown in FIG. 1, first, entropy decoding, inverse quantization and inverse transformation are used to obtain residual information, and the decoded code stream determines whether the current block uses intra-frame or inter-frame prediction.

In the case of intra-coding, the pixel values of pixels in the surrounding reconstructed area are used to construct prediction information according to the intra-prediction method used.

If it is inter-frame coding, you need to parse out the motion information, and use the parsed motion information to determine the reference block in the reconstructed image, and use the pixel values of the pixels in the block as prediction information (this process is called motion compensation (motion, compensation, MC)). The reconstruction information can be obtained after filtering operations using the prediction information plus the residual information.

It should be understood that the above is only an explanation for a general image codec, and may be different in practice.

It should also be understood that the technical solutions of the embodiments of the present application are mainly applied to skip encoding or direct encoding before prediction by the image encoder, or to skip after the inverse prediction of the image decoder. ) Decoding or direct decoding exists in most image codecs, such as H.263, H.264, H.265, H.266 during the encoding process, as shown in Figure 1.

Several concepts related to the embodiments of the present application are introduced below.

Derivation mode: A new type of block division method, which can be derived into multiple sub-blocks according to a block, where the derived block is a subdivision method, and the derived sub-blocks are merged according to the subdivision method.

FIG. 2 shows a schematic diagram of a block division method. As shown in FIG. 2, block 100 may be divided into block 101, block 102, or block 103 according to different division methods, where block 101 may be derived into derivative block 1011 1018, each derivative block may be composed of two or more sub-blocks, each sub-block may be derived from three horizontal lines; block 102 may be derived into derivative blocks 1021-1028, and each derivative block may be derived from Two or more sub-blocks, each sub-block can be derived from three vertical lines; block 103 can be derived into derivative blocks 1031-1038, each derived block can be derived from two or more sub-blocks Block composition, each sub-block can be obtained from four sub-strips horizontally and vertically.

FIG. 2 illustrates the derivation of blocks as an example, and non-blocks can also be derived. FIG. 3 shows a schematic diagram of another block division method. As shown in FIG. 3, a non-square block 200 and a non-square block 300 can also be derived horizontally and vertically, where block 200 can be derived into derivative blocks 201-204, each derivative block can be composed of two or more sub-blocks, and each sub-block can be derived based on horizontal; The block 200 may also be derived into derivative blocks 205-208, and each derivative block may be composed of two or more sub-blocks, and each sub-block may be derived according to a vertical derivative.

Block 300 can be derived into derivative blocks 301-304, each derived block can be composed of two or more sub-blocks, and each sub-block can be derived according to level; block 300 can also be derived into derived blocks 305-308 Each derivative block may be composed of two or more sub-blocks, and each sub-block may be derived according to vertical derivation.

It should be understood that the division and derivation of blocks in FIGS. 2 and 3 are only schematic, and the manner of division and derivation of blocks is not specifically limited in the embodiments of the present application.

The surrounding blocks (or, may also be called adjacent blocks): the adjacent block A of block E is the block where the samples (x ₀ -1, y ₀ ) are located, and the adjacent block B of block E is the sample (x ₀ , y ₀ -1) where the block is, the adjacent block C of block E is the block where the sample (x ₁ +1, y ₀ -1) is located, and the adjacent block D of block E is the sample (x ₀ -1, y _0- 1) The block where block E is adjacent to block F is the block where the sample (x ₀ -1, y ₁ ) is located, and block E is adjacent block G is the block where the sample (x ₁ , y ₀ -1) is located. Where (x ₀ , y ₀ ) is the coordinates of the sample in the upper left corner of the block E in the image, (x ₁ , y ₀ ) is the coordinates of the sample in the upper right corner of the block E in the image, (x ₀ , y ₁ ) is the lower left of the block E The coordinates of the corner sample in the image. The spatial positional relationship between block E and its neighbors A, B, C and D is shown in Figure 4.

The surrounding block X (X is A, B, C, D, F, or G) "exists" means that the block should be within the image and that the block should belong to the same band as the block E; otherwise, the adjacent block "does not exist".

If the block "does not exist" or has not been decoded, the block is "unavailable"; otherwise the block is "available". If the block where the image sample is located "does not exist" or this sample has not been decoded, this sample is "unavailable"; otherwise this sample is "available".

It should be understood that FIG. 4 is only schematic, and it will be different as the standard develops, for example, there may be adjacent blocks below the F block.

The following introduces the export method of MV in skip encoding mode or direct encoding mode:

First calculate the BlockDistance from PicCur to PicCol (denoted as BlockDistanceCurCol) and the BlockDistance from PicCol to PicColRef (denoted as BlockDistanceColRef):

(1) If the SceneReferenceEnableFlag value of the current image is 1 and the RefPicNum value is 1, then BlockDistanceCurCol and BlockDistanceColRef are both 1;

(2) Otherwise, if the reference image index value stored in MvSuCol is -1, then BlockDistanceColRef is equal to 1, BlockDistanceCurCol = (DistanceIndexCur-DistanceIndexCol + 512)% 512;

(3) Otherwise, BlockDistanceCurCol = (DistanceIndexCur-DistanceIndexCol + 512)% 512, BlockDistanceColRef = (DistanceIndexCol-DistanceIndexColRef + 512)% 512.

Among them, PicCur is the image where the current prediction unit is located, DistanceIndexCur is the distance index of PicCur, PicCol is the reference image marked as 0 in the reference image queue, DistanceIndexCol is the distance index of PicCol, MvSuCol is the brightness sample in PicCol and the upper left corner of the current prediction unit The motion information storage unit where the luminance sample corresponding to the location is located, DistanceIndexColRef is the distance index of the forward or first reference image PicColRef of MvSuCol; then the motion vector of the current prediction unit is derived as follows:

(4) If the reference image index value stored in MvSuCol is -1, then mvE is a zero vector;

(5) If the condition of step (4) is not satisfied, derive mvE (mvE_x, mvE_y) as follows:

mvE_x = Clip3 (-32768, 32767, (BlockDistanceCurCol × mvcol_x × (16384 / BlockDistanceColRef) +8192) >> 14);

mvE_y = Clip3 (-32768, 32767, ((BlockDistanceCurCol × (mvcol_y + delta1) × (16384 / BlockDistanceColRef) +8192) >> 14) -delta2).

Among them, mvcol (mvcol_x, mvcol_y) is the forward motion vector of MvSuCol, and the derivation mode constant of delta1 and delta2, then mvE is the forward motion vector of the current prediction unit.

The MV export of the B frame has a similar situation. Of course, different standard skip encoding modes or direct encoding modes have different MV export methods. After determining the MV, the prediction value of the skip coding mode is the value of the reference frame block pointed to by mv. In the direct coding mode, the value of the reference frame block pointed to by mv and the value of the current block need to be predicted, transformed, quantized, and finally the residual Need to be passed into the code stream.

At present, the skip or direct coding mode in AVS3 is not developed. Motion search is not performed, and the MV is only exported through the surrounding blocks that have been coded. In the skip coding process, the residual is not transmitted. Residual information needs to be transmitted during the encoding process, and skip or direct coding is only for 2Nx2N mode. For the block division method in the derivative mode, insufficient consideration has been taken into consideration, which affects the utilization rate of the derivative mode. At the same time, skip or direct coding is only for the current The divided blocks are performed without further consideration of the divided sub-blocks, and the coding gain is low.

The embodiments of the present application provide a coding method. By performing skip or direct coding on a derivative block or a sub-block in the derivative block, a good coding gain can be achieved with lower complexity.

FIG. 5 shows a schematic flowchart of an encoding method 400 provided by an embodiment of the present application. The method 400 may be executed by an encoding device. As shown in FIG. 5, the method 400 includes:

S410. Derivative block is derived according to the encoding block to be encoded.

Optionally, the derivative block is composed of one or more sub-blocks.

It should be understood that the process of deriving the coding block in the embodiment of the present application may be as shown in FIG. 2, and the coding block to be coded may be block 100 in FIG. 2, or may be block 200 and block 300 in FIG. 3, and It can be a coding block of other shapes, which is not limited in this embodiment of the present application.

420. Use the first encoding mode to encode the derived block to obtain first encoding information.

Optionally, the first coding mode may include a skip coding mode or a direct coding mode.

Specifically, the coded block to be coded may be divided and then derived to obtain a derivative block, wherein the derived derivative block may be composed of multiple sub-blocks, and the encoding device may use the jump Encode in the over-encoding mode or direct-encoding mode to obtain the first encoding information.

Optionally, the first encoding information includes MV information.

Optionally, in the embodiment of the present application, the encoding device may only use the skip encoding mode or the direct encoding mode to encode the derivative block, or may use the skip encoding mode or the direct encoding mode to encode only the sub-blocks of the derivative block , You can also encode derivative blocks and sub-blocks of derivative blocks.

Optionally, the derivative block is composed of a plurality of sub-blocks. When the encoding device encodes the sub-blocks of the derivative block in the skip encoding mode or the direct encoding mode, it may adopt the skip encoding mode for each sub-block in the derivative block Alternatively, the direct encoding mode may be used for encoding, and a part of the sub-blocks of the derived block may also be encoded using the skip encoding mode or the direct encoding mode.

It should be understood that, in the embodiments of the present application, the derived block or its sub-blocks are encoded in the skip encoding mode or the direct encoding mode, and may also be understood as the skipped encoding or the direct encoding of the derived block or its sub-blocks.

FIG. 6 shows a schematic diagram of another block division method. As shown in FIG. 6, block 501 can be derived into derivative block 5011, derivative block 5012 and derivative block 5013, and block 502 can be derived into derivative block 5021 and derivative block 5022. And derivative block 5023. Skip or direct encode the derivative blocks 5011, 5012, 5013, 5021, 5022, or 5023. Specific encoding methods, such as skip and direct encoding of the derivative block 5011, acquisition of encoding information, such as acquisition of mv vector, can be encoded according to the entire derivative block 5011 to obtain the encoding information, or according to 5011 neutron block To obtain the coding information, the coding information may also be obtained according to the sub-block 2.

It should be understood that the derivative modes of the derivative block shown in FIG. 6 above are not limited to the above types, and may also be derivative models of various derivative blocks shown in FIG. 7.

Optionally, the first encoding mode is used to encode the derivative block to obtain first encoding information, including:

When it is determined that the preset condition occurs, the first encoding mode is used to encode the derivative block to obtain first encoding information.

Optionally, when determining whether to encode the derivative block, the preset condition includes but is not limited to one or more of the following:

(1) The length and width of the derived block is greater than or equal to M;

(2) The length and width of the derived block is less than or equal to N, and M is less than or equal to N;

(3) The area of the derivative block is greater than or equal to P;

(4) The area of the derivative block is less than or equal to Q, and P is less than or equal to Q;

(5) A specific derivative block is obtained in the derivative mode.

For example, for a 32 × 32 square block, two 32 × 8 and one 32 × 16 non-square sub-blocks are derived according to the 1: 2: 1 level, when the encoding device determines that the length and width of the sub-block is greater than or equal to 16 If the skip coding mode or the direct coding mode is used for coding, the derivative block and / or the 32 × 16 sub-block can be coded.

For another example, when the area of the derivative block is greater than or equal to P, the first encoding information may be encoding using the skip encoding mode or the direct encoding mode for the entire derivative block.

Optionally, when determining whether to encode the sub-block, the preset condition includes but is not limited to one or more of the following:

(1) The length and width of the sub-block is greater than or equal to K;

(2) The length and width of the sub-block are less than or equal to L, and K is less than or equal to L;

(3) The area of the sub-block is greater than or equal to W;

(4) The area of the sub-block is less than or equal to Y, and W is less than or equal to Y;

(5) A specific sub-block is obtained in the derivative mode.

For example, the derived block includes sub-block 1 and sub-block 2. When the area of sub-block 1 is greater than or equal to W, and the area of sub-block 2 is smaller than W, the first coding information may be to adopt a skip coding mode for sub-block 1 or Direct encoding mode is obtained by encoding.

For another example, when the encoding device determines that the sub-block is L-shaped, skip or directly encode, as shown in FIG. 2, when the block 103 is derived into the derivative block 1037, the derivative block 1037 and / or its sub-blocks may be encoded .

Optionally, after the first encoding information is determined, the entire derivative block may share the first encoding information.

For example, as shown in FIG. 6, the first coding information is obtained by using the skip coding mode or the direct coding mode for the sub-block 1 of the derivative block 5011, and the sub-block 2 may share the first coding information, that is, the coding information of the sub-block 1 It is the same as the coding information of sub-block 2.

S430: Determine a code stream according to the first encoding information, where the code stream includes indication information, where the indication information is used to indicate that the first encoding information is obtained by using the first encoding mode for the derived block.

Specifically, the encoding device obtains the first encoding information, and the code stream is obtained after the processes of prediction, transformation, quantization, and entropy encoding. The encoding device may write instruction information in the code stream, and the instruction information indicates the encoding device obtained The encoding information is obtained by encoding the derivative block or the sub-blocks in the derivative block, so that the decoding device determines to perform the analysis of skip encoding or direct encoding information after analyzing the code stream.

In the encoding method of the embodiment of the present application, the derived block or sub-block derived from the encoded block is encoded using the skip encoding mode or the direct encoding mode. Since skip encoding or direct encoding does not perform a motion search process, it can be lower Under complexity, a better coding gain and good quality are obtained.

FIG. 8 shows another schematic flowchart of an encoding method 400 according to an embodiment of the present application. As shown in FIG. 8, the method 400 includes:

S411: Derivatively obtain a derivative block according to the encoding block to be encoded.

It should be understood that S411 is the same as the above-mentioned S410, and for the sake of brevity, no further description is provided here.

S421: Use the first encoding mode for encoding, and encode each sub-block in the derived block separately to obtain multiple encoding information.

Optionally, the first coding mode may include a skip coding mode or a direct coding mode.

Specifically, the derivative block may be composed of multiple sub-blocks, and the encoding device may separately encode each of the multiple sub-blocks to obtain coding information corresponding to each sub-block.

For example, for the derivative block 5011 shown in FIG. 6, the encoding apparatus may respectively encode the sub-block 1 and the sub-block 2 using the skip coding mode or the direct coding mode to obtain two coding information.

S422: Determine the first encoded information according to the multiple encoded information.

Optionally, the determining the first encoding information according to the plurality of encoding information includes:

Calculate the cost of each encoded information in the multiple encoded information;

According to the cost of each encoded information, the first encoded information is determined.

Optionally, the first encoding information is the least cost encoding information among the plurality of encoding information.

Optionally, in the embodiment of the present application, the method for calculating the cost is not specifically limited, and the method for calculating the cost may be rate-distortion optimization (RDO) decision, sum of absolute values (sum of of absolute differences, SAD) ) Algorithms or sum-of-absolute transformed (SATD) algorithms after transformation.

For example, as shown in FIG. 6, the derivative block 5011 is composed of sub-block 1 and sub-block 2, the encoding device may encode sub-block 1 to obtain coding information 1, encode sub-block 2 to obtain coding information 2, and calculate coding information 1 respectively And the cost of the coding information 2, after determining that the cost of the coding information 1 is less than the cost of the coding information 2, determine the coding information 1 as the first coding information.

S431. Determine a code stream according to the first encoding information, where the code stream includes indication information that is used to indicate that the first encoding information is obtained by encoding the derivative block using the first encoding mode.

Specifically, after the encoding device encodes each of the plurality of sub-blocks separately, the first encoding information is determined from the plurality of encoding information, and the first encoding information corresponds to the first sub-block. The identification information of the first sub-block is written into the code stream, and is used to indicate that the first encoding information is obtained by encoding the first sub-block using the first encoding mode.

Optionally, when the plurality of encoded information are the same, the first encoded information is any one of the encoded information.

Specifically, when the encoding information obtained by encoding the plurality of sub-blocks by the encoding device is the same, the encoding device may determine any one of the encoding information as the first encoding information.

Optionally, the indication information is also used to indicate that the encoding information of each sub-block in the plurality of sub-blocks is the same.

It should be understood that, in the embodiments of the present application, when the plurality of encoding information are the same, the encoding information may be written only once, or the encoding information may not be written. At the decoding end, if the indication information in the code stream is read indicating multiple sub-blocks If the encoding information is the same, you can only read the encoding information once, or do not read the encoding information. If the encoding information is written, the decoding end can directly use the encoding information of any one of the multiple subblocks to derive or decode the encoding information. The first encoding information.

Optionally, when the plurality of encoded information are different, the first encoded information is the plurality of encoded information.

Specifically, when the encoding information obtained by encoding each of the plurality of sub-blocks by the encoding device is different, the encoding device may determine the plurality of encoding information as the first encoding information.

Optionally, the indication information is also used to indicate that the encoding information of each sub-block in the plurality of sub-blocks is different.

It should be understood that, in the embodiments of the present application, when the plurality of encoding information is different, the plurality of encoding information may be written, and the decoding end may use the encoding information of each sub-block in the plurality of sub-blocks to derive or decode the first encoding information.

It should also be understood that in the embodiment of the present application, in S421, a part of the plurality of sub-blocks may also be encoded using the first encoding mode. For example, the derivative block includes 5 sub-blocks, and the encoding device may select 3 sub-blocks for encoding. 3 encoded information, and the first encoded information is determined from the 3 encoded information.

In the encoding method of the embodiment of the present application, by using the skip encoding mode or the direct encoding mode to encode the sub-blocks in the derivative block derived from the encoding block, better coding gain and better coding can be obtained with lower complexity the quality of.

FIG. 9 shows another schematic flowchart of the encoding method 400 according to an embodiment of the present application. As shown in FIG. 9, the method 400 includes:

S412: Derivative block is derived according to the encoding block to be encoded.

It should be understood that S412 is the same as the above S410, and for the sake of brevity, it will not be repeated here.

S423, adopting the first encoding mode to encode the derived block to obtain second encoding information;

S424: Use the first coding mode to code each sub-block in the derived block to obtain multiple coding information.

Optionally, the first encoding mode includes the skip encoding mode or direct encoding mode.

Specifically, the encoding device may encode the derivative block and each sub-block in the derivative block in the skip encoding mode or the direct encoding mode.

It should be understood that there is no actual sequence between S423 and S424.

S425: Determine the first encoding information according to the second encoding information and the plurality of encoding information.

Optionally, the determining the first encoding information according to the second encoding information and the plurality of encoding information includes:

Determine the cost of the second encoded information and the cost of the multiple encoded information;

The first encoding information is determined according to the cost of the second encoding information and the costs of the plurality of encoding information.

Optionally, the first encoding information is the encoding information with the smallest cost among the second encoding information and the plurality of encoding information.

Optionally, the first encoding information is the second encoding information, or the first encoding information is the plurality of encoding information.

For example, as shown in FIG. 6, the encoding device may encode the derivative block 5011 to obtain second encoding information, or may encode the sub-block 1 in the derivative block 5011 to obtain third encoding information, and may also derive the derivative block 5011 The sub-block 2 in is encoded to obtain fourth encoding information, the third encoding information and the fourth encoding information constitute the plurality of encoding information, and the encoding device may calculate the cost of the second encoding information and the plurality of encoding information After determining that the cost of the plurality of encoded information is less than the cost of the second encoded information, determine the plurality of encoded information as the first encoded information.

Optionally, in the embodiment of the present application, the method for calculating the cost is not specifically limited, and the method for calculating the cost may be RDO decision, SAD algorithm, or SATD algorithm.

It should be understood that in the embodiment of the present application, part of the plurality of sub-blocks may also be encoded in S424, for example, the derivative block includes 5 sub-blocks, and the encoding device may select 3 sub-blocks to encode to obtain 3 encoding information, and The first encoding information is determined among the three encoding information.

S432. Determine a code stream according to the first encoding information, where the code stream includes indication information that is used to indicate that the first encoding information is obtained by encoding the derivative block using the first encoding mode, Or, the indication information is used to indicate that the first encoding information is obtained by encoding each sub-block using the first encoding mode.

For example, if the encoding device determines the plurality of encoding information as the first encoding information in S425, the indication information may indicate that the first encoding information is obtained by encoding each sub-block.

In the encoding method of the embodiment of the present application, the derivative block derived from the encoding block and each sub-block in the derivative block are encoded in skip encoding mode or direct encoding mode, respectively, and the one with the lower cost is determined as the first encoding Information, you can get better coding gain and good quality at lower complexity.

The image encoding method according to an embodiment of the present application has been described in detail above with reference to FIGS. 5 to 9, and the image decoding method according to an embodiment of the present application will be described in detail below with reference to FIG.

FIG. 10 shows a schematic flowchart of a decoding method 600 according to an embodiment of the present application. As shown in FIG. 10, the method 600 may be executed by a decoding device. The method 600 includes:

S610: Obtain indication information from the code stream, where the indication information is used to instruct the derived block to adopt the first encoding mode to obtain encoding information, where the first encoding mode includes a skip encoding mode or a direct encoding mode;

S620: Decode the derived block using the first encoding mode according to the instruction information.

Specifically, the decoding device may parse the code stream to obtain the instruction information, and the instruction information indicates that the encoding information obtained by the encoding device is to encode the derivative block or the sub-blocks in the derivative block using the skip encoding mode or the direct encoding mode As a result, the encoding device decodes the derivative block or the sub-block of the derivative block in the skip encoding mode or the direct encoding mode according to the instruction information.

Optionally, the derived block is composed of multiple sub-blocks, the multiple sub-blocks include the first sub-block, and the skipped coding mode or the direct coding mode is used to decode the derived block or the sub-blocks of the derived block, include:

The first sub-block is decoded using the skip coding mode or the direct coding mode.

As shown in FIG. 6, the encoding device performs skip encoding and direct encoding on the sub-block 1 in the derivative block 5011 to obtain encoding information. The encoding device writes the instruction information into the code stream. The instruction information indicates that the encoding information is After the sub-block 1 is coded, the decoding device can parse the sub-block 1 by decoding or directly decoding the instruction information after parsing the indication information from the code stream.

Optionally, the indication information is used to indicate that the encoding information obtained by the encoding device is obtained by using the first encoding mode for the derived block, and the first encoding mode is used to decode the derived block, including:

Using the first encoding mode, the derived block is decoded.

As shown in FIG. 6, the encoding device performs skip encoding and direct encoding on the derivative block 5011 to obtain encoding information, and the encoding device writes instruction information into the code stream. The instruction information indicates that the encoding information is to encode the derivative block 5011 Obtained, after decoding the instruction information from the code stream, the decoding device may perform skip decoding or direct decoding on the derivative block 5011.

Optionally, the derived block is composed of multiple sub-blocks, and the indication information is also used to indicate that the coding information obtained by applying the first coding mode to each of the multiple sub-blocks is the same, and the first coding mode is adopted To decode the derived block, including:

Using the first coding mode, the second sub-block is decoded, and the second sub-block is any one of the plurality of sub-blocks.

Optionally, the derivative block is composed of multiple sub-blocks, and the indication information is also used to indicate that the coding information obtained by using the first coding mode for each of the multiple sub-blocks is different, and the first coding mode is adopted, Decode the derived block, including:

Using the first coding mode, each of the plurality of sub-blocks is decoded separately.

In one embodiment, when the decoding device decodes that the block division mode is a derivative mode, it indicates that it is possible to perform skip encoding or direct encoding in the mode, and the decoding device obtains that the encoding device skips or derives the derived block or its sub-blocks In direct encoding, the entire block can share one encoding information, and continue to derive or decode skip or direct encoding information through a fixed block in each sub-block. It is also possible to determine which block in each sub-block is used to derive or decode skip or direct mode coding information by continuing to decode the identification information.

In one embodiment, when the decoding device decodes that the block division mode is the derivative mode, it indicates that skip or direct encoding is possible in the mode, and the decoding device decodes that the sub-blocks in the derivative block are skipped or encoded by the encoding device. In direct coding, continue to determine skip or direct coding information export or decoding through the information of each sub-block. It is also possible to determine whether the information of each sub-block is the same by decoding the identification bit, so as to derive or decode skip or direct encoded information only by the information of a certain sub-block.

In one embodiment, when the decoding device decodes that the block division mode is a derivative mode, it indicates that it is possible to perform skip or direct encoding in the mode, and the decoding device obtains the skip or direct encoding of the derived block or its sub-blocks. When encoding, the parity bit of the code stream is parsed to obtain the derived or decoded derivative or decoded information of the derived block, or the derived or decoded skip or direct decoded information of each sub-block.

The codec method according to an embodiment of the present application has been described in detail above with reference to FIGS. 5 to 10, and the codec device according to an embodiment of the present application is described in detail below with reference to FIGS. 11 to 14.

FIG. 11 shows a schematic block diagram of an encoding device 700 according to an embodiment of the present application. As shown in FIG. 11, the encoding device 700 includes:

The first processing module 710 is configured to derive derivative blocks according to the encoding blocks to be encoded;

The second processing module 720 is configured to encode the derived block using a first encoding mode to obtain first encoding information. The first encoding mode includes a skip encoding mode or a direct encoding mode;

The third processing module 730 is configured to determine a code stream according to the first encoding information, where the code stream includes indication information, and the indication information is used to indicate that the first encoding information is to use the first encoding on the derived block The pattern is obtained by encoding.

Optionally, the derived block is composed of multiple sub-blocks, and the second processing module 720 is specifically configured to:

Adopting the first coding mode to separately encode each of the multiple sub-blocks to obtain multiple coding information;

The first encoding information is determined from the plurality of encoding information.

Optionally, the second processing module 720 is specifically used to:

Determine the cost of the multiple encoded information;

According to the cost of the plurality of encoded information, the first encoded information is determined.

Optionally, in the case where the plurality of encoded information are the same, the first encoded information is any one of the encoded information.

Optionally, in a case where the plurality of encoded information are different, the first encoded information is the plurality of encoded information.

Optionally, the indication information is also used to indicate that the encoding information of each sub-block in the plurality of sub-blocks is the same or different.

Optionally, the derived block is composed of multiple sub-blocks, and the second processing module 720 is specifically configured to:

Adopt the first encoding mode to encode the derived block to obtain second encoded information;

Adopt the skip coding mode or the direct coding mode to separately encode each of the multiple sub-blocks to obtain multiple coding information;

Based on the second encoding information and the plurality of encoding information, the first encoding information is determined.

Optionally, the second processing module 720 is specifically used to:

Determine the cost of the second encoded information and the cost of the multiple encoded information;

The first coding information is determined according to the cost of the second coding information and the costs of the plurality of coding information.

Optionally, the indication information is also used to indicate that the first encoding information is the second encoding information or the third encoding information.

FIG. 12 shows a schematic block diagram of a decoding device 800 according to an embodiment of the present application. As shown in FIG. 12, the decoding device 800 includes:

The obtaining module 810 is used to obtain indication information from the code stream, and the indication information is used to instruct the derivative block to adopt the first encoding mode to obtain encoding information. Modes include skip coding mode or direct coding mode;

The fifth processing module 820 is configured to decode the derived block using the first encoding mode according to the instruction information.

Optionally, the derivative block includes a first sub-block, and the fifth processing module 820 is specifically configured to:

Using the first coding mode, the first sub-block is decoded.

Optionally, the indication information is used to indicate that the encoding information obtained by the encoding end is obtained by using the first encoding mode for the first sub-block, and the fifth processing module 820 is specifically configured to:

Using the first coding mode, the first sub-block is decoded.

Optionally, the derivative block is composed of multiple sub-blocks, and the indication information is also used to indicate that the coding information obtained by using the first coding mode for each of the multiple sub-blocks is the same, and the fifth processing module 820 specifically uses to:

Using the first coding mode, the second sub-block is decoded, and the second sub-block is any one of the plurality of sub-blocks.

Optionally, the derivative block is composed of multiple sub-blocks, and the indication information is also used to indicate that the coding information obtained by using the first coding mode for each of the multiple sub-blocks is different, and the fifth processing module 820 specifically uses to:

Using the first coding mode, each of the plurality of sub-blocks is decoded separately.

The codec device and the codec system composed of the codec device will be described in detail below with reference to FIGS. 13 and 14. It should be understood that the codec device and the codec system shown in FIGS. 13 and 14 can execute the codec method of the embodiment of the present application.

13 is a schematic diagram of a video codec device according to an embodiment of the present application. The video codec device 50 may be a device specifically used for encoding and / or decoding video images, or may be an electronic device with a video codec function. Further, the codec device 50 may be a mobile of a wireless communication system Terminal or user equipment.

The codec device 50 may include the following modules or units: a controller 56, a codec 54, a radio interface 52, an antenna 44, a smart card 46, a card reader 48, a keypad 34, a memory 58, an infrared port 42, and a display 32. In addition to the modules and units shown in FIG. 25, the codec device 50 may also include a microphone or any suitable audio input module, which may be a digital or analog signal input, and the codec device 50 may also include an audio output Module, the audio output module can be headphones, speakers or analog audio or digital audio output connection. The codec device 50 may also include a battery, which may be a solar cell, a fuel cell, or the like. The codec apparatus 50 may also include an infrared port for short-range line-of-sight communication with other devices. The codec apparatus 50 may also use any suitable short-range communication method to communicate with other devices, for example, Bluetooth wireless connection, USB / FireWire wired connection.

The memory 58 may store data in the form of images and audio data, and may also store instructions for execution on the controller 56.

The codec 54 can realize the encoding and decoding of audio and / or video data or the auxiliary encoding and decoding of audio and / or video data under the control of the controller 56.

The smart card 46 and the card reader 48 can provide user information, and can also provide network authentication and authentication information for authorized users. The specific implementation forms of the smart card 46 and the card reader 48 may be an integrated circuit card (universal integrated circuit (UICC) and a UICC reader.

The radio interface circuit 52 may generate a wireless communication signal, which may be a communication signal generated during a cellular communication network, a wireless communication system, or a wireless local area network communication.

The antenna 44 is used to transmit the radio frequency signal generated in the radio interface circuit 52 to other devices (the number of devices may be one or more), and may also be used from other devices (the number of devices may be one or more) A) Receive radio frequency signals.

In some embodiments of the present application, the codec apparatus 50 may receive video image data to be processed from another device before transmission and / or storage. In other embodiments of the present application, the codec device 50 may receive images through a wireless or wired connection and encode / decode the received images.

14 is a schematic block diagram of a video codec system 7000 according to an embodiment of the present application.

As shown in FIG. 14, the video codec system 7000 includes a source device 4000 and a destination device 5000. The source device 4000 generates encoded video data. The source device 4000 may also be called a video encoding device or a video encoding device. The destination device 5000 may decode the encoded video data generated by the source device 4000. The destination device 5000 can also be called a video decoding device or a video decoding device.

The specific implementation form of the source device 4000 and the destination device 5000 may be any one of the following devices: desktop computer, mobile computing device, notebook (eg, laptop) computer, tablet computer, set-top box, smart phone, handset, TVs, cameras, display devices, digital media players, video game consoles, in-vehicle computers, or other similar devices.

The destination device 5000 can receive the encoded video data from the source device 4000 via the channel 6000. Channel 6000 may include one or more media and / or devices capable of moving encoded video data from source device 4000 to destination device 5000. In one example, the channel 6000 may include one or more communication media that enable the source device 4000 to directly transmit the encoded video data to the destination device 5000 in real time. In this example, the source device 4000 may be based on the communication standard ( For example, wireless communication protocol) to modulate the encoded video data, and can transmit the modulated video data to the destination device 5000. The one or more communication media may include wireless and / or wired communication media, such as a radio frequency (RF) spectrum or one or more physical transmission lines. The one or more communication media described above may form part of a packet-based network (eg, local area network, wide area network, or global network (eg, Internet)). The one or more communication media may include routers, switches, base stations, or other devices that enable communication from the source device 4000 to the destination device 5000.

In another example, the channel 6000 may include a storage medium that stores the encoded video data generated by the source device 4000. In this example, the destination device 5000 can access the storage medium via disk access or card access. Storage media can include a variety of locally accessible data storage media, such as Blu-ray discs, high-density digital video discs (digital video discs, DVDs), compact disc read-only memories (CD-ROMs), flash memories , Or other suitable digital storage media for storing encoded video data.

In another example, the channel 6000 may include a file server or another intermediate storage device that stores the encoded video data generated by the source device 4000. In this example, the destination device 5000 can access the encoded video data stored at the file server or other intermediate storage device via streaming or download. The file server may be a server type capable of storing the encoded video data and transmitting the encoded video data to the destination device 5000. For example, the file server may include a world wide web (web) server (for example, for a website), a file transfer protocol (FTP) server, a network attached storage (NAS) device, and a local disk driver.

The destination device 5000 can access the encoded video data via a standard data connection (eg, Internet connection). Example types of data connections include wireless channels suitable for accessing encoded video data stored on file servers, wired connections (eg, cable modems, etc.), or a combination of both. The transmission of the encoded video data from the file server may be streaming transmission, download transmission, or a combination of both.

The codec method of the present application is not limited to wireless application scenarios. Exemplarily, the codec method of the present application can be applied to video codec supporting various multimedia applications such as the following applications: aerial TV broadcasting, cable TV transmission, satellite TV transmission, Streaming video transmission (eg, via the Internet), encoding of video data stored on data storage media, decoding of video data stored on data storage media, or other applications. In some examples, the video codec system 7000 may be configured to support one-way or two-way video transmission to support applications such as video streaming, video playback, video broadcasting, and / or video telephony.

In FIG. 14, the source device 4000 includes a video source 4001, a video encoder 4002, and an output interface 4003. In some examples, output interface 4003 may include a modulator / demodulator (modem) and / or a transmitter. The video source 4001 may include a video capture device (eg, a video camera), a video archive containing previously captured video data, a video input interface to receive video data from a video content provider, and / or a computer for generating video data Graphic system, or a combination of the above video data sources.

Video encoder 4002 may encode video data from video source 4001. In some examples, the source device 4000 directly transmits the encoded video data to the destination device 5000 via the output interface 4003. The encoded video data may also be stored on a storage medium or file server for later access by the destination device 5000 for decoding and / or playback.

In the example of FIG. 14, the destination device 5000 includes an input interface 5003, a video decoder 5002, and a display device 5001. In some examples, input interface 5003 includes a receiver and / or a modem. The input interface 5003 can receive the encoded video data via the channel 6000. The display device 5001 may be integrated with the destination device 5000 or may be external to the destination device 5000. Generally, the display device 5001 displays decoded video data. The display device 5001 may include various display devices, such as a liquid crystal display, a plasma display, an organic light emitting diode display, or other types of display devices.

The video encoder 4002 and the video decoder 5002 can operate according to the video compression standard (for example, the high-efficiency video codec H.265 standard), and can comply with the high-efficiency video coding (HEVC) test model (HM ). The text description of the H.265 standard ITU-TH.265 (V3) (04/2015) was released on April 29, 2015, and can be downloaded from http://handle.itu.int/11.1002/7000/12455. The entire contents of the document are incorporated by reference.

Those of ordinary skill in the art may realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

It should be understood that “one embodiment” or “one embodiment” mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in one or more embodiments of the present application. Therefore, “in one embodiment” or “in one embodiment” appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence numbers of the above processes does not mean that the execution order is sequential, and the execution order of each process should be determined by its function and inherent logic, and should not be applied to the embodiments of the present application The implementation process constitutes no limitation.

In addition, the terms "system" and "network" are often used interchangeably herein. The term "and / or" in this article is just an association relationship that describes an associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist at the same time, exist alone B these three cases. In addition, the character “/” in this article generally indicates that the related objects before and after are in an “or” relationship.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a division of logical functions. In actual implementation, there may be other divisions, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

The above is only the specific implementation of this application, but the scope of protection of this application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (24)

1. An encoding method, characterized in that it includes:

   Derivative block is derived according to the encoding block to be encoded;

   Adopting a first encoding mode to encode the derived block to obtain first encoding information, where the first encoding mode includes a skip encoding mode or a direct encoding mode;

   A code stream is determined according to the first encoding information, and the code stream includes indication information used to indicate that the first encoding information is obtained by encoding the derivative block using the first encoding mode .
2. The method according to claim 1, wherein the derivative block is composed of a plurality of sub-blocks, and encoding the derivative block to obtain first encoding information includes:

   Adopting the first coding mode to separately encode each of the plurality of sub-blocks to obtain a plurality of coding information;

   The first encoding information is determined from the plurality of encoding information.
3. The method according to claim 2, wherein the determining the first encoding information from the plurality of encoding information includes:

   Determine the cost of the multiple encoded information;

   According to the cost of the plurality of encoded information, the first encoded information is determined.
4. The method according to claim 2, characterized in that, in the case where the plurality of coding information are the same, the first coding information is any one of the plurality of coding information.
5. The method according to claim 2, characterized in that, when the plurality of encoded information are different, the first encoded information is the plurality of encoded information.
6. The method according to any one of claims 2 to 5, wherein the indication information is further used to indicate that the encoding information of each sub-block in the plurality of sub-blocks is the same or different.
7. The method according to claim 1, wherein the derivative block is composed of a plurality of sub-blocks, and encoding the derivative block to obtain first encoding information includes:

   Adopting the first encoding mode to encode the derived block to obtain second encoding information;

   Adopting the first coding mode to separately encode each of the plurality of sub-blocks to obtain a plurality of coding information;

   The first encoding information is determined according to the second encoding information and the plurality of encoding information.
8. The method according to claim 7, wherein the determining the first encoding information according to the second encoding information and the plurality of encoding information includes:

   Determine the cost of the second encoded information and the cost of the plurality of encoded information;

   The first encoding information is determined according to the cost of the second encoding information and the costs of the plurality of encoding information.
9. A decoding method, characterized in that it includes:

   Obtain indication information from the code stream, where the indication information is used to instruct the derivative block to adopt the first encoding mode to obtain encoding information, the derivative block is derived from the encoding block in the derivative mode, and the first encoding mode includes Over coding mode or direct coding mode;

   According to the instruction information, the first encoding mode is used to decode the derived block.
10. The method according to claim 9, wherein the sub-block of the derived block includes a first sub-block, and the decoding of the derived block using the first encoding mode includes:

    Using the first encoding mode, decode the first sub-block.
11. The method according to claim 9, wherein the derived block is composed of a plurality of sub-blocks, and the indication information is further used to indicate that each sub-block in the plurality of sub-blocks is obtained by using the first coding mode Encoding information is the same, and using the first encoding mode to decode the derived block includes:

    Using the first encoding mode, the second sub-block is decoded, and the second sub-block is any one of the plurality of sub-blocks.
12. The method according to claim 9, wherein the derived block is composed of a plurality of sub-blocks, and the indication information is further used to indicate that each sub-block in the plurality of sub-blocks is obtained by using the first coding mode The encoding information is different, and using the first encoding mode to decode the derived block includes:

    Using the first coding mode, each of the plurality of sub-blocks is decoded separately.
13. An encoding device, characterized in that it includes:

    The first processing module is used to derive derivative blocks according to the encoding blocks to be encoded;

    A second processing module, configured to encode the derived block in a first encoding mode to obtain first encoded information;

    A third processing module, configured to determine a code stream according to the first encoding information, where the code stream includes indication information, and the indication information is used to indicate that the first encoding information is for the derivative block or the derivative The sub-blocks of the block are obtained by coding using the skip coding mode or the direct coding mode.
14. The apparatus according to claim 13, wherein the derived block is composed of multiple sub-blocks, and the second processing module is used to:

    Adopting the first coding mode to separately encode each of the plurality of sub-blocks to obtain a plurality of coding information;

    The first encoding information is determined from the plurality of encoding information.
15. The apparatus according to claim 14, wherein the second processing module is used to:

    Determine the cost of the multiple encoded information;

    According to the cost of the plurality of encoded information, the first encoded information is determined.
16. The apparatus according to claim 14, characterized in that, in a case where the plurality of coding information are the same, the first coding information is any one of the plurality of coding information.
17. The apparatus according to claim 14, wherein the first encoding information is the plurality of encoding information when the plurality of encoding information is different.
18. The apparatus according to any one of claims 14 to 17, wherein the indication information is further used to indicate that the encoding information of each sub-block in the plurality of sub-blocks is the same or different.
19. The apparatus according to claim 13, wherein the derived block is composed of multiple sub-blocks, and the second processing module is used to:

    Adopting the first encoding mode to encode the derived block to obtain second encoding information;

    Adopting the skip coding mode or the direct coding mode to separately encode each of the multiple sub-blocks to obtain multiple coding information;

    The first encoding information is determined according to the second encoding information and the plurality of encoding information.
20. The apparatus according to claim 19, wherein the second processing module is configured to:

    Determine the cost of the second encoded information and the cost of the plurality of encoded information;

    The first encoding information is determined according to the cost of the second encoding information and the costs of the plurality of encoding information.
21. A decoding device is characterized by comprising:

    The obtaining module is used to obtain indication information from the code stream, and the indication information is used to instruct the derivative block to adopt the first encoding mode to obtain encoding information. The derivative block is derived from the encoding block in the derivative mode. A coding mode includes skip coding mode or direct coding mode;

    The fifth processing module is configured to decode the derived block using the first encoding mode according to the instruction information.
22. The apparatus according to claim 21, wherein the sub-block of the derived block includes a first sub-block, and the fifth processing module is configured to:

    Using the first encoding mode, decode the first sub-block.
23. The apparatus according to claim 21, wherein the derived block is composed of a plurality of sub-blocks, and the indication information is further used to indicate that each of the plurality of sub-blocks is obtained by using the first coding mode Encoding information is the same, the fifth processing module is used to:

    Using the first encoding mode, the second sub-block is decoded, and the second sub-block is any one of the plurality of sub-blocks.
24. The apparatus according to claim 21, wherein the derived block is composed of a plurality of sub-blocks, and the indication information is further used to indicate that each sub-block in the plurality of sub-blocks is obtained by using the first coding mode Encoding information is different, the fifth processing module is used to:

    Using the first coding mode, each of the plurality of sub-blocks is decoded separately.

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