BR112019006146B1 - VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND TERMINAL - Google Patents

Abstract

A video encoding method, a video decoding method, and a terminal are provided. The video decoding method includes: obtaining, from a bit stream, an index of predicted motion information of a current picture block into a candidate predicted motion information list, where the predicted motion information includes reference picture and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is motion information of an adjacent block of the current picture block in the time domain or in the spatial domain; query the candidate forecasted movement information list based on the index, and use the found candidate forecasted movement information as the forecasted movement information; determining a correspondence between a motion vector difference and the motion vector prediction value based on the predicted motion information, and obtaining the motion vector difference from the bit stream; and add the motion vector prediction value and the corresponding motion vector difference based on the match (...).

Description

FIELD OF TECHNIQUE

[0001] The present invention relates to the field of video encoding and decoding, and in particular to a video encoding method, a video decoding method, and a terminal.

FUNDAMENTALS

[0002] A basic principle of video coding compression is to use a correlation between spatial domain, time domain, and codeword to eliminate redundancy as much as possible. A hybrid block-based video coding framework is a relatively popular method in which video coding compression is implemented by performing steps of intraprediction, interprediction, transformation, quantization, entropy coding, and the like. Both the Moving Picture Experts Group (MPEG) and High Efficiency Video Coding (HEVC) standards use the block-based hybrid video coding structure.

[0003] During interprediction, motion information of each image block needs to be determined, in order to generate a prediction block of the image block using a motion compensation process. Motion information includes reference image information and a motion vector.

[0004] When motion information of a current image block is determined, commonly used methods include a merge mode, a non-merge mode, and the like. The following steps can be included in merge mode:

[0005] 1. Construct a list of candidate move information, where candidate move information in the list is obtained through deduction using move information of an adjacent block from the current picture block in terms of space or time.

[0006] 2. Select a piece of motion information from the candidate motion information list, transfer an index of the motion information in the list, and specify all motion information of the current image block using the index of the motion information.

[0007] A motion vector in blending mode is obtained by completely duplicating a motion vector of an adjacent block, and consequently a motion vector of the current image block is not accurate enough.

[0008] However, in non-merge mode, the motion information of the current image block can be determined by performing the following steps:

[0009] 1. Transfer reference image information, where the reference image information includes unidirectional/bidirectional prediction information, one or two reference image lists, and one or two reference image indexes corresponding to one or more two reference image lists respectively.

[0010] 2. Construct a list of candidate motion vector prediction values, where a candidate motion vector prediction value in the list is obtained through deduction using motion information from an adjacent block of the current image block .

[0011] 3. Select a motion vector prediction value from the list of candidate motion vector prediction values, transfer an index of the motion vector prediction value in the list, and specify a motion vector prediction value of the current image block using the index of the motion vector prediction value.

[0012] 4. Transfer a motion vector difference, and add the motion vector difference and the motion vector prediction value to get a motion vector of the current image block.

[0013] In non-merge mode, the reference image information, the motion vector prediction value index, and the corresponding motion vector difference need to be transferred, so that the motion information is more accurate. However, a relatively large amount of information is transferred and, accordingly, a relatively high bit rate.

SUMMARY

[0014] Embodiments of the present invention provide a video encoding method, a video decoding method, and a terminal, to reduce the information that needs to be transferred in a case of the same video quality, thus saving specific transmission bits.

[0015] A first aspect of embodiments of the present invention discloses a video decoding method, including: obtaining, from a bitstream, an index of predicted motion information of a current image block into a list of motion information candidate predicted motion, where the predicted motion information includes reference image information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is motion information of an adjacent block of the block current image in the time domain or in the spatial domain; query the candidate forecasted movement information list based on the index, and use the found candidate forecasted movement information as the forecasted movement information; determining a correspondence between a motion vector difference and the motion vector prediction value based on the predicted motion information, and obtaining the motion vector difference from the bit stream; and adding the motion vector prediction value and the corresponding motion vector difference based on the match to obtain a motion vector of the current image block.

[0016] In this implementation, the motion vector prediction value of the current image block is corrected using the motion vector difference, so that the motion vector of the current image block obtained through reconstruction is more accurate . Furthermore, the motion vector difference is determined more efficiently based on the correspondence between the motion vector difference and the motion vector prediction value, thus saving transmission bits.

[0017] In an optional deployment, determining a match between a motion vector difference and the motion vector prediction value based on predicted motion information includes: determining a prediction mode of the current image block based on in the reference image information, where the prediction mode includes one-way prediction or two-way prediction; determine a quantity of motion vector differences based on the prediction mode; and determining the correspondence between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information.

[0018] In this implementation, the correspondence between the motion vector difference and the motion vector prediction value is determined, and then the motion vector prediction value is corrected using the motion vector difference corresponding to the motion vector prediction value, so that the motion vector of the current image block obtained through reconstruction is more accurate.

[0019] In an optional deployment, determining an amount of motion vector differences based on the prediction mode includes: if the prediction mode is unidirectional prediction, determining that there is a motion vector difference; or if the prediction mode is bidirectional prediction, and the reference image information includes a figure order count of a reference image, determine the amount of motion vector differences based on the image order count current image block reference; or if the prediction mode is bidirectional prediction, obtain the amount of motion vector differences from at least one of slice layer header information, image layer header information, and image layer header information. sequence that are from the bit stream.

[0020] Beneficial effects of this implementation are as follows: the motion vector prediction value of the current image block is corrected using the motion vector difference, so that the motion vector of the current image block obtained through reconstruction is more accurate.

[0021] In an optional deployment, determining the amount of motion vector differences based on the figure order count of the reference image of the current image block includes: whether a figure order count of a first reference image of the current image block is greater than a figure order count of the current image block, and a figure order count of a second reference image of the current image block is less than the figure order count of the block from current image, determine that there are two motion vector differences; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference.

[0022] Beneficial effects of this implementation are as follows: the motion vector prediction value of the current image block is corrected using the motion vector difference, so that the motion vector of the current image block obtained through reconstruction is more accurate.

[0023] In an optional deployment, if the prediction mode is bidirectional prediction, the predicted motion information includes two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value of motion, and determining the match between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information includes: if there are two motion vector differences , separately using the two motion vector differences as motion vector differences corresponding to the first motion vector prediction value and the second motion vector prediction value; or if there is a motion vector difference, use the motion vector difference as a motion vector difference corresponding to the first motion vector prediction value, and define a motion vector difference corresponding to the second prediction value of motion vector as 0; or use the motion vector difference as a motion vector difference corresponding to the second motion vector prediction value, and set a motion vector difference corresponding to the first motion vector prediction value to 0; or use the motion vector difference as a motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value; or obtaining, from the bitstream, information indicating that the motion vector difference corresponds to the first motion vector prediction value or indicating that the motion vector difference corresponds to the second motion vector prediction value .

[0024] The beneficial effects of this implementation are as follows: the motion vector prediction value of the current image block is corrected using the motion vector difference, so that the motion vector of the current image block obtained through reconstruction is more accurate. Furthermore, the motion vector difference is determined more efficiently based on the correspondence between the motion vector difference and the motion vector prediction value, thus saving transmission bits.

[0025] In an optional implementation, a quantity of candidate predicted motion information pieces in the candidate predicted motion information list is obtained from at least one of the slice layer header information, the image layer header information and the header sequence layer information that is from the bitstream.

[0026] Beneficial effects of this implementation are as follows: the motion vector prediction value of the current image block is corrected using the motion vector difference, so that the motion vector of the current image block obtained through reconstruction is more accurate.

[0027] In an optional deployment, the amount of candidate predicted motion information pieces in the candidate predicted motion information list is less than a number of motion information pieces in a motion information list in a merge mode.

[0028] Beneficial effects of this implementation are as follows: The amount of pieces of candidate predicted motion information in the list of candidate predicted motion information is controlled to reduce computation complexity, thus increasing a decoding speed.

[0029] In an optional implementation, the current image block is any prediction unit of a current image block to be reconstructed corresponding to the bit stream.

[0030] Beneficial effects of this implementation are as follows: the motion vector prediction value of the current image block is corrected using the motion vector difference, so that the motion vector of the current image block obtained through reconstruction is more accurate. Furthermore, the motion vector difference is determined more efficiently based on the correspondence between the motion vector difference and the motion vector prediction value, thus saving transmission bits.

[0031] A second aspect of embodiments of the present invention discloses a video decoding terminal, and the video decoding terminal includes a processor and memory. The processor is configured to perform the following operations: obtaining, from a bit stream, an index of predicted motion information of a current picture block into a candidate predicted motion information list, where the predicted motion information includes reference image information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is motion information of an adjacent block of the current image block in either the time domain or the spatial domain ; query the candidate forecasted movement information list based on the index, and use the found candidate forecasted movement information as the forecasted movement information; determining a correspondence between a motion vector difference and the motion vector prediction value based on the predicted motion information, and obtaining the motion vector difference from the bit stream; and adding the motion vector prediction value and the corresponding motion vector difference based on the match to obtain a motion vector of the current image block.

[0032] In an optional implementation, the fact that the processor determines a match between a motion vector difference and the motion vector prediction value based on predicted motion information includes: determining a motion block prediction mode current image based on reference image information, where the prediction mode includes one-way prediction or two-way prediction; determine a quantity of motion vector differences based on the prediction mode; and determining the correspondence between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information.

[0033] In an optional implementation, the fact that the processor determines a number of motion vector differences based on the prediction mode includes: if the prediction mode is unidirectional prediction, determining that there is a motion vector difference ; or if the prediction mode is bidirectional prediction, and the reference image information includes a figure order count of a reference image, determine the amount of motion vector differences based on the image order count current image block reference; or if the prediction mode is bidirectional prediction, obtain the amount of motion vector differences of at least one of the slice layer header information, image layer header information, and sequence layer header information that are from the bitstream.

[0034] In an optional implementation, the fact that the processor determines the amount of motion vector differences based on the current image block's figure order count of the reference image includes: whether a figure order count of a first reference picture of the current picture block is greater than a figure order count of the current picture block, and a figure order count of a second reference picture of the current picture block is less than the figure order count of current image block figure, determine that there are two motion vector differences; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference.

[0035] In an optional deployment, if the prediction mode is bidirectional prediction, the predicted motion information includes two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value of motion, and the fact that the processor determines the correspondence between the motion vector difference and the predicted motion vector value based on the amount of motion vector differences and the predicted motion information includes: if there are two motion vector differences, separately use the two motion vector differences as motion vector differences corresponding to the first motion vector prediction value and the second motion vector prediction value; or if there is a motion vector difference, use the motion vector difference as a motion vector difference corresponding to the first motion vector prediction value, and define a motion vector difference corresponding to the second prediction value of motion vector as 0; or use the motion vector difference as a motion vector difference corresponding to the second motion vector prediction value, and set a motion vector difference corresponding to the first motion vector prediction value to 0; or use the motion vector difference as a motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value; or obtain, from the bitstream, information indicating that the motion vector difference corresponds to the first motion vector prediction value or indicate that the motion vector difference corresponds to the second motion vector prediction value .

[0036] In an optional deployment, a number of pieces of candidate predicted motion information in the candidate predicted motion information list is obtained from at least one of the slice layer header information, the image layer header information and the sequence layer header information that is from the bitstream.

[0037] In an optional deployment, the amount of candidate predicted motion information pieces in the candidate predicted motion information list is less than a number of motion information pieces in a motion information list in a merge mode.

[0038] In an optional implementation, the current image block is any prediction unit of a current image block to be reconstructed corresponding to the bit stream.

[0039] A third aspect of embodiments of the present invention discloses a video decoding terminal, including: a first acquisition unit, configured to obtain, from a bit stream, an index of predicted movement information of a block of current image in a candidate predicted motion information list, where predicted motion information includes reference image information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is information moving an adjacent block of the current image block in the time domain or in the spatial domain; a query unit, configured to query the list of candidate forecasted movement information based on the index, and use the found candidate forecasted movement information as the forecasted movement information; a determining unit configured to determine a match between a motion vector difference and the motion vector prediction value based on the predicted motion information; a second acquisition unit configured to obtain the motion vector difference from the bit stream; and an operation unit configured to add the motion vector prediction value and the corresponding motion vector difference based on the matching to obtain a motion vector of the current picture block.

[0040] In an optional deployment, the determination unit includes: a first determination subunit, configured to determine a prediction mode of the current image block based on reference image information, where the prediction mode includes unidirectional prediction or bidirectional prediction; a second determination sub-unit configured to determine a quantity of motion vector differences based on the prediction mode; and a third determination sub-unit configured to determine the correspondence between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information.

[0041] In an optional deployment, the second determination subunit is specifically configured to: if the prediction mode is unidirectional prediction, determine that there is a motion vector difference; or if the prediction mode is bidirectional prediction, and the reference image information includes a figure order count of a reference image, determine the amount of motion vector differences based on the image order count current image block reference; or if the prediction mode is bidirectional prediction, obtain the amount of motion vector differences of at least one of the slice layer header information, image layer header information, and sequence layer header information that are from the bitstream.

[0042] In an optional implementation, when determining the amount of motion vector differences based on the figure order count of the reference image of the current image block, the second determination subunit is specifically configured for: if a count figure order count of a first reference picture of the current picture block is greater than a figure order count of the current picture block, and a figure order count of a second reference picture of the current picture block is less that the figure order count of the current picture block, determine that there are two motion vector differences; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference.

[0043] In an optional deployment, if the prediction mode is bidirectional prediction, the predicted motion information includes two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value of motion, and the third determination subunit is specifically configured to: if there are two motion vector differences, separately use the two motion vector differences as motion vector differences corresponding to the first motion vector prediction value and the second motion vector prediction value; or if there is a motion vector difference, use the motion vector difference as a motion vector difference corresponding to the first motion vector prediction value, and define a motion vector difference corresponding to the second prediction value of motion vector as 0; or use the motion vector difference as a motion vector difference corresponding to the second motion vector prediction value, and set a motion vector difference corresponding to the first motion vector prediction value to 0; or use the motion vector difference as a motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value; or obtaining, from the bitstream, information indicating that the motion vector difference corresponds to the first motion vector prediction value or indicating that the motion vector difference corresponds to the second motion vector prediction value .

[0044] In an optional deployment, a number of pieces of candidate predicted motion information in the candidate predicted motion information list is obtained from at least one of the slice layer header information, the image layer header information , and the header sequence layer information that is from the bitstream.

[0045] In an optional deployment, the amount of candidate predicted motion information pieces in the candidate predicted motion information list is less than a number of motion information pieces in a motion information list in a merge mode .

[0046] In an optional implementation, the current image block is any prediction unit of a current image block to be reconstructed corresponding to the bit stream.

[0047] A fourth aspect of embodiments of the present invention discloses a video encoding method including: constructing a candidate predicted motion information list from a current picture block, where candidate predicted motion information included in the motion information list predicted candidate is motion information of an adjacent block of the current image block in the time domain or in the spatial domain; select, from the list of candidate predicted motion information, a piece of candidate predicted motion information as predicted motion information of the current image block based on a motion vector that is from the current image block and that is obtained during motion estimation, and determining an index of the candidate predicted motion information selected from the candidate predicted motion information list, where the predicted motion information includes reference image information and a motion vector prediction value; determining a match between a motion vector difference and the motion vector prediction value based on the predicted motion information; obtaining, based on the match and the motion vector, a motion vector difference corresponding to the motion vector prediction value; and encode the motion vector index and difference into a bit stream.

[0048] In an optional deployment, determining a match between a motion vector difference and the motion vector prediction value based on predicted motion information includes: determining a prediction mode of the current image block based on in the reference image information, where the prediction mode includes one-way prediction or two-way prediction; determine a quantity of motion vector differences based on the prediction mode; and determining the correspondence between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information.

[0049] In an optional deployment, determining an amount of motion vector differences based on the prediction mode includes: if the prediction mode is unidirectional prediction, determining that there is a motion vector difference; or if the prediction mode is bidirectional prediction, and the reference image information includes a figure order count of a reference image of the current image block, determine the amount of motion vector differences based on the count of reference image picture order of the current image block; or if the prediction mode is bidirectional prediction, encode a predefined amount of motion vector differences into at least one of slice layer header information, image layer header information, and sequence layer header information that are from the bitstream.

[0050] In an optional deployment, determining the amount of motion vector differences based on the figure order count of the reference image of the current image block includes: whether a figure order count of a first reference image of the current image block is greater than a figure order count of the current image block, and a figure order count of a second reference image of the current image block is less than the figure order count of the block from current image, determine that there are two motion vector differences; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference.

[0051] In an optional deployment, if the prediction mode is bidirectional prediction, the predicted motion information includes two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value of motion, and determining the match between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information includes: if there are two motion vector differences , separately using the two motion vector differences as motion vector differences corresponding to the first motion vector prediction value and the second motion vector prediction value; or if there is a motion vector difference, use the motion vector difference as a motion vector difference corresponding to the first motion vector prediction value, and define a motion vector difference corresponding to the second prediction value of motion vector as 0; or use the motion vector difference as a motion vector difference corresponding to the second motion vector prediction value, and set a motion vector difference corresponding to the first motion vector prediction value to 0; or use the motion vector difference as a motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value; or determine, based on a predefined correspondence, a correspondence between the motion vector difference and each of the first motion vector prediction value and the second motion vector prediction value, and encode the predefined correspondence into the stream of bits.

[0052] In an optional implementation, the method includes: encoding a number of pieces of candidate predicted motion information in the list of candidate predicted motion information into at least one of the slice layer header information, the slice header information, image layer, and the sequence layer header information that is from the bit stream.

[0053] In an optional deployment, the amount of candidate predicted motion information pieces in the candidate predicted motion information list is less than a number of motion information pieces in a motion information list in a merge mode.

[0054] In an optional implementation, the current image block is any predictive unit of a current image block to be encoded corresponding to the bit stream.

[0055] A fifth aspect of embodiments of the present invention discloses a video encoding terminal, and the video encoding terminal includes a processor and memory. The processor is configured to perform the following operations: construct a candidate predicted motion information list of a current image block, where the candidate predicted motion information included in the candidate predicted motion information list is motion information of an adjacent block of the current image block in the time domain or in the spatial domain; select, from the list of candidate predicted motion information, a piece of candidate predicted motion information as predicted motion information of the current image block based on a motion vector that is from the current image block and that is obtained during motion estimation, and determining an index of the candidate predicted motion information selected from the candidate predicted motion information list, where the predicted motion information includes reference image information and a motion vector prediction value; determining a match between a motion vector difference and the motion vector prediction value based on the predicted motion information; obtaining, based on the match and the motion vector, a motion vector difference corresponding to the motion vector prediction value; and encode the motion vector index and difference into a bit stream.

[0056] In an optional implementation, the fact that the processor determines a match between a motion vector difference and the motion vector prediction value based on predicted motion information includes: determining a motion block prediction mode current image based on reference image information, where the prediction mode includes one-way prediction or two-way prediction; determine a quantity of motion vector differences based on the prediction mode; and determining the correspondence between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information.

[0057] In an optional implementation, the fact that the processor determines a number of motion vector differences based on the prediction mode includes: if the prediction mode is unidirectional prediction, determining that there is a motion vector difference ; or if the prediction mode is bidirectional prediction, and the reference image information includes a figure order count of a reference image of the current image block, determine the amount of motion vector differences based on the count of reference image picture order of the current image block; or if the prediction mode is bidirectional prediction, encode a predefined amount of motion vector differences into at least one of slice layer header information, image layer header information, and sequence layer header information which are from the bitstream.

[0058] In an optional implementation, the fact that the processor determines the amount of motion vector differences based on the current image block's figure order count of the reference image includes: whether a figure order count of a first picture reference of the current picture block is greater than a figure order count of the current picture block, and a picture order count of a second reference picture of the current picture block is less than the figure order count from the current image block figure, determine that there are two motion vector differences; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference.

[0059] In an optional deployment, if the prediction mode is bidirectional prediction, the predicted motion information includes two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value of motion, and the fact that the processor determines the correspondence between the motion vector difference and the predicted motion vector value based on the amount of motion vector differences and the predicted motion information includes: if there are two motion vector differences, separately use the two motion vector differences as motion vector differences corresponding to the first motion vector prediction value and the second motion vector prediction value; or if there is a motion vector difference, use the motion vector difference as a motion vector difference corresponding to the first motion vector prediction value, and define a motion vector difference corresponding to the second prediction value of motion vector as 0; or use the motion vector difference as a motion vector difference corresponding to the second motion vector prediction value, and set a motion vector difference corresponding to the first motion vector prediction value to 0; or use the motion vector difference as a motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value; or determine, based on a predefined correspondence, a correspondence between the motion vector difference and each of the first motion vector prediction value and the second motion vector prediction value, and encode the predefined correspondence into the stream of bits.

[0060] In an optional implementation, the method includes: encoding a number of pieces of candidate predicted motion information in the list of candidate predicted motion information into at least one of the slice layer header information, the slice header information, image layer, and the sequence layer header information that is from the bitstream.

[0061] In an optional deployment, the amount of candidate predicted motion information pieces in the candidate predicted motion information list is less than a number of motion information pieces in a motion information list in a merge mode .

[0062] In an optional implementation, the current image block is any predictive unit of a current image block to be encoded corresponding to the bit stream.

[0063] A sixth aspect of embodiments of the present invention discloses a video encoding terminal including: a list building unit, configured to build a list of candidate predicted motion information from a current picture block, where motion information candidate predicted included in the candidate predicted motion information list is motion information of an adjacent block of the current image block in the time domain or in the spatial domain; a selection unit, configured to select, from the list of candidate predicted motion information, a piece of candidate predicted motion information as predicted motion information of the current picture block based on a motion vector that is from the current image that is obtained during motion estimation, where the predicted motion information includes reference image information and a motion vector prediction value; a first determining unit configured to determine an index of the candidate forecasted movement information selected from the candidate forecasted movement information list; a second determining unit configured to determine a match between a motion vector difference and the motion vector prediction value based on the predicted motion information; an acquisition unit configured to obtain, based on the match and the motion vector, a motion vector difference corresponding to the motion vector prediction value; and a first encoding unit configured to encode the motion vector index and difference into a bit stream.

[0064] In an optional deployment, the second determination unit includes: a first determination subunit, configured to determine a prediction mode of the current image block based on reference image information, where the prediction mode includes unidirectional prediction or bidirectional prediction; a second determination sub-unit configured to determine a quantity of motion vector differences based on the prediction mode; and a third determination sub-unit configured to determine the correspondence between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information.

[0065] In an optional deployment, the second determination subunit is specifically configured to: if the prediction mode is unidirectional prediction, determine that there is a motion vector difference; or if the prediction mode is bidirectional prediction, and the reference image information includes a figure order count of a reference image of the current image block, determine the amount of motion vector differences based on the count of reference image picture order of the current image block; or if the prediction mode is bidirectional prediction, encode a predefined amount of motion vector differences into at least one of the slice layer header information, image layer header information, and image layer header information. sequence that are from the bitstream.

[0066] In an optional deployment, when determining the amount of motion vector differences based on the figure order count of the reference image of the current image block, the second determination subunit is configured specifically for: if a count figure order count of a first reference picture of the current picture block is greater than the figure order count of the current picture block, and a figure order count of a second reference picture of the current picture block is less that the figure order count of the current picture block, determine that there are two motion vector differences; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference.

[0067] In an optional deployment, if the prediction mode is bidirectional prediction, the predicted motion information includes two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value of motion, and the third determination subunit is specifically configured to: if there are two motion vector differences, separately use the two motion vector differences as motion vector differences corresponding to the first motion vector prediction value and the second motion vector prediction value; or if there is a motion vector difference, use the motion vector difference as a motion vector difference corresponding to the first motion vector prediction value, and define a motion vector difference corresponding to the second prediction value of motion vector as 0; or use the motion vector difference as a motion vector difference corresponding to the second motion vector prediction value, and set a motion vector difference corresponding to the first motion vector prediction value to 0; or use the motion vector difference as a motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value; or determine, based on a predefined correspondence, a correspondence between the motion vector difference and each of the first motion vector prediction value and the second motion vector prediction value, and encode the predefined correspondence into the stream of bits.

[0068] In an optional implementation, the terminal further includes a second encoding unit configured to encode a number of pieces of candidate predicted motion information in the candidate predicted motion information list into at least one of the layer header information slice, the image layer header information, and the sequence layer header information that is from the bit stream.

[0069] In an optional deployment, the amount of candidate predicted motion information pieces in the candidate predicted motion information list is less than a number of motion information pieces in a motion information list in a merge mode.

[0070] In an optional implementation, the current image block is any predictive unit of a current image block to be encoded corresponding to the bit stream.

[0071] A seventh aspect of embodiments of the present invention discloses a computer storage medium configured to store computer software instructions used in the first aspect and fourth aspect, where the computer software instruction includes a program designed to execute the aforementioned aspects.

[0072] It should be understood that the technical solutions in the second aspect to the seventh aspect of the embodiments of the present invention are consistent with the technical solutions in the first aspect of the embodiments of the present invention, and beneficial effects obtained are similar. Details are not described again in this application.

[0073] It can be learned from the above technical solutions that the embodiments of the present invention have the following advantages: in the embodiments of the present invention, reference image information of an adjacent block is obtained and is used as the image reference information of the current image block. For a motion vector, a motion vector of an adjacent block is used to predict the motion vector of the current picture block, and the motion vector difference is transferred to correct the motion vector prediction value, to achieve a relatively high accuracy of the motion vector. Furthermore, the motion vector difference is determined more efficiently based on the correspondence between the motion vector difference and the motion vector prediction value, thus saving transmission bits. It can be learned that implementing the embodiments of the present invention can reduce the information that needs to be transferred in a case of the same video quality, thus saving specific transmission bits.

BRIEF DESCRIPTION OF THE DRAWINGS

[0074] To describe the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings required to describe the embodiments. Of course, the accompanying drawings in the following description only show some embodiments of the present invention, and people of ordinary skill in the art can derive other drawings from these accompanying drawings without creative efforts.

[0075] Figure 1 is a schematic flowchart of a video decoding method disclosed in an embodiment of the present invention;

[0076] Figure 2 is a schematic structural diagram of a video decoding terminal disclosed in an embodiment of the present invention;

[0077] Figure 3 is a schematic structural diagram of another video decoding terminal disclosed in an embodiment of the present invention;

[0078] Figure 4 is a schematic flowchart of a video encoding method disclosed in an embodiment of the present invention;

[0079] Figure 5 is a schematic structural diagram of a video encoding terminal disclosed in an embodiment of the present invention;

[0080] Figure 6 is a schematic structural diagram of another video encoding terminal disclosed in an embodiment of the present invention;

[0081] Figure 7 is a schematic structural diagram of a video encoding/decoding apparatus or electronic device disclosed in an embodiment of the present invention; It is

[0082] Figure 8 is a schematic structural diagram of a video encoding/decoding system disclosed in an embodiment of the present invention.

DESCRIPTION OF MODALITIES

[0083] To make the objects, technical solutions, and advantages of the present invention clearer, the present invention is further described in the following with reference to the attached drawings. Evidently, the described embodiments are only some and not all the embodiments of the present invention. All other embodiments obtained by people of common skill in the art, based on the embodiments of the present invention, without creative efforts, shall fall within the scope of protection of the present invention.

[0084] In the specification, claims, and accompanying drawings of the present invention, the terms "first (a)", "second (a)" and the like are intended to distinguish between different objects, but do not indicate a particular order. Furthermore, the terms "include" and "have" and any other variants thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally additionally includes an unlisted step or unit, or optionally includes additionally another step or unit inherent in the process, method, or device.

[0085] Embodiments of the present invention provide a video encoding method, a video decoding method, and a terminal, to reduce the information that needs to be transferred in a case of the same video quality, thus saving specific transmission bits . Details are described separately below.

[0086] Figure 1 is a schematic flowchart of a video decoding method disclosed in an embodiment of the present invention. The video decoding method shown in Figure 1 might include the following steps.

[0087] 101. Obtaining, from a bit stream, an index of predicted motion information of a current picture block into a candidate predicted motion information list.

[0088] In this embodiment of the present invention, predicted motion information includes reference image information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is motion information of a adjacent block of the current image block in the time domain or in the spatial domain.

[0089] In this embodiment of the present invention, the current image block can be any prediction unit of a current image block to be reconstructed corresponding to the bit stream. In some embodiments of the present invention, the current picture block may alternatively be any transformation unit or decoding unit of the current picture block to be reconstructed corresponding to the bit stream. There is no limitation on this.

[0090] A number of pieces of candidate predicted motion information in the candidate predicted motion information list can be obtained from at least one of slice layer header information, image layer header information, and image layer header information. sequence layer header that are from the bit stream.

[0091] In addition, the amount of candidate predicted movement information pieces in the candidate predicted movement information list is less than a quantity of movement information pieces in a movement information list in a merge mode. Blending mode is an interprediction method in the High Efficiency Video Coding (HEVC) standard. In merge mode, a piece of motion information from an adjacent block of the current picture block is directly selected from the motion information list to specify motion information of the current picture block, and there is a relatively large amount of motion information in the movement information list. However, in this embodiment of the present invention, the amount of candidate predicted motion information pieces in the candidate predicted motion information list is less than the amount of motion information pieces in the motion information list in the merge mode, in order to reduce the calculation complexity.

[0092] 102. Query the candidate forecasted movement information list based on the index, and use the found candidate forecasted movement information as the forecasted movement information.

[0093] Normally, there is a high probability that the reference image information of adjacent image blocks is completely the same, while the motion vectors of adjacent image blocks are normally slightly different. Therefore, in this embodiment of the present invention, the found candidate predicted motion information is used as the predicted motion information, and a motion vector difference is also obtained to correct the motion vector prediction value included in the predicted motion information. , to get a relatively accurate motion vector of the current image block.

[0094] 103. Determine a match between a motion vector difference and a motion vector prediction value based on the predicted motion information, and obtain the motion vector difference from the bit stream.

[0095] In an optional deployment, the correspondence between the motion vector difference and the motion vector prediction value can be determined based on the predicted motion information as follows: determine a prediction mode of the current image block based on reference image information, where the prediction mode includes one-way prediction or two-way prediction; determine a quantity of motion vector differences based on the prediction mode; and determining the correspondence between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information.

[0096] In the implementation of determining the correspondence between the motion vector difference and the motion vector prediction value, the step of determining a quantity of motion vector differences based on the prediction mode can be implemented as follows : if the prediction mode is unidirectional prediction, determine that there is a motion vector difference; or if the prediction mode is bidirectional prediction, and the reference image information includes a figure order count of a reference image, determine the amount of motion vector differences based on the image order count current image block reference; or if a figure order count of a first reference picture of the current picture block is greater than a figure order count of the current picture block, and a figure order count of a second reference picture of the current image is less than the figure order count of the current image block, determine that there are two motion vector differences; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference; or if the prediction mode is bidirectional prediction, get the amount of motion vector differences of at least one of the current image block bitstream, and slice layer header information, layer header information image, and sequence layer header information that is from the bit stream.

[0097] After the amount of motion vector differences is obtained, the correspondence between the motion vector difference and the motion vector prediction value can be determined as follows: if the prediction mode is bidirectional prediction , the predicted motion information includes two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value, and if there are two motion vector differences, use the two differences separately of motion vector as motion vector differences corresponding to the first motion vector prediction value and the second motion vector prediction value; or if there is a motion vector difference, use the motion vector difference as a motion vector difference corresponding to the first motion vector prediction value, and define a motion vector difference corresponding to the second prediction value of motion vector as 0; or use the motion vector difference as a motion vector difference corresponding to the second motion vector prediction value, and set a motion vector difference corresponding to the first motion vector prediction value to 0; or use the motion vector difference as a motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value; or obtain, from the bitstream, information indicating that the motion vector difference corresponds to the first motion vector prediction value or indicating that the motion vector difference corresponds to the second motion vector prediction value , and determining a correspondence between the motion vector difference and the motion vector prediction value based on the obtained information.

[0098] It should be noted that in a feasible deployment, the motion vector difference is used as the motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value of movement. In other words, the motion vector difference is used again. This saves the consumption of coding the motion vector difference and improves the efficiency.

[0099] 104. Add the motion vector prediction value and the corresponding motion vector difference based on the match to get a motion vector of the current image block.

[0100] In this embodiment of the present invention, the motion vector prediction value and the corresponding motion vector difference are added, so that an offset of the motion vector prediction value can be corrected, and the motion vector of the current image block can be restored with relative accuracy.

[0101] It can be learned that, according to the video decoding method described in Figure 1, the motion vector of the current image block can be restored with relative accuracy, and therefore, an output video has relatively high quality in a case of the same bitrate.

[0102] Figure 2 is a schematic structural diagram of a video decoding terminal disclosed in an embodiment of the present invention. As shown in Figure 2, the terminal includes a processor 201 and memory 202. Memory 202 can be configured to store cache required by processor 201 to perform data processing and can be further configured to provide data invoked by processor 201 to perform data processing. of data and provide storage space for obtained result data.

[0103] In this embodiment of the present invention, the processor 201 is configured to perform the following operations by invoking the program code stored in the memory 202: obtaining, from a stream of bits, an index of predicted movement information of a block of current image in a candidate predicted motion information list, where predicted motion information includes reference image information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is information moving an adjacent block of the current image block in the time domain or in the spatial domain; query the candidate forecasted movement information list based on the index, and use the found candidate forecasted movement information as the forecasted movement information; determining a correspondence between a motion vector difference and the motion vector prediction value based on the predicted motion information, and obtaining the motion vector difference from the bit stream; and adding the motion vector prediction value and the corresponding motion vector difference based on the match to obtain a motion vector of the current image block.

[0104] According to the video decoding terminal described in Figure 2, the motion vector of the current image block can be restored with relative accuracy and, therefore, an emitted video has relatively high quality in a case of the same rate of bits.

[0105] Figure 3 is a schematic structural diagram of another video decoding terminal disclosed in an embodiment of the present invention. As shown in Figure 3, the terminal may include: a first fetching unit 301, configured to: obtain, from a bit stream, an index of predicted motion information of a current picture block into a list of motion information candidate predicted motion, where the predicted motion information includes reference image information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is motion information of an adjacent block of the block current image in the time domain or in the spatial domain; a query unit 302, configured to: query the list of candidate forecasted movement information based on the index, and use the found candidate forecasted movement information as the forecasted movement information; a determination unit 303 configured to determine a match between a motion vector difference and the motion vector prediction value based on the predicted motion information; a second acquisition unit 304 configured to obtain the motion vector difference from the bit stream; and an operating unit 305 configured to add the motion vector prediction value and the corresponding motion vector difference based on the matching to obtain a motion vector of the current picture block.

[0106] According to the video decoding terminal described in Figure 3, the motion vector of the current image block can be restored with relative accuracy and, therefore, an emitted video has relatively high quality in a case of the same rate of bits.

[0107] Figure 4 is a schematic flowchart of a video encoding method disclosed in an embodiment of the present invention. The video encoding method shown in Figure 4 may include the following steps.

[0108] 401. Constructing a candidate predicted motion information list of a current picture block, where candidate predicted motion information included in the candidate predicted motion information list is motion information of an adjacent block of the current picture block in the time domain or space domain.

[0109] In this embodiment of the present invention, the current image block is any predictive unit of an image block to be encoded corresponding to a bit stream. In some embodiments of the present invention, the current picture block may alternatively be any transformation unit or decoding unit of the current picture block to be encoded corresponding to the bit stream. There is no limitation on this.

[0110] In an optional implementation, a number of pieces of candidate predicted motion information in the candidate predicted motion information list may be encoded in at least one of slice layer header information, image layer header information, and sequence layer header information that is from the bitstream.

[0111] In addition, the amount of candidate predicted movement information pieces in the candidate predicted movement information list is less than a quantity of movement information pieces in a movement information list in a merge mode. Blend mode is an interprediction method in the High Efficiency Video Coding (HEVC) standard. In merge mode, a piece of motion information of an adjacent block of the current picture block is directly selected from the motion information list to specify motion information of the current picture block, and there are a relatively large amount of pieces of information movement information in the movement information list. However, in this embodiment of the present invention, the amount of candidate predicted motion information pieces in the candidate predicted motion information list is less than the amount of motion information pieces in the motion information list in the merge mode, in order to reduce the calculation complexity.

[0112] 402. Select, from the list of candidate predicted motion information, a piece of candidate predicted motion information as predicted motion information of the current picture block based on a motion vector that is of the current picture block and that is obtained during motion estimation, and determining an index of the candidate predicted motion information selected from the candidate predicted motion information list, where the predicted motion information includes reference image information and a vector prediction value of movement.

[0113] In this embodiment of the present invention, motion estimation is performed on the current image block using motion information from an adjacent block. In an optional implementation, locations of a plurality of motion vectors are obtained during motion estimation, and a motion vector with minimal rate distortion costs is selected as the motion vector of the current image block.

[0114] In a feasible deployment, the candidate predicted motion information in the candidate predicted motion information list is traversed, and each piece of candidate predicted motion information is used as the predicted motion information of the current image block to calculate the rate distortion costs, so as to select a piece of candidate predicted motion information having minimal rate distortion costs as the predicted motion information of the current image block.

[0115] 403. Determine a match between a motion vector difference and the motion vector prediction value based on predicted motion information.

[0116] In this embodiment of the present invention, the correspondence between the motion vector difference and the motion vector prediction value can be determined as follows: determine a prediction mode of the current image block based on the image information reference, where the forecast mode includes one-way forecast or two-way forecast; determine a quantity of motion vector differences based on the prediction mode; and determining the correspondence between the motion vector difference and the motion vector prediction value based on the amount of motion vector differences and the predicted motion information.

[0117] Determining a quantity of motion vector differences based on the prediction mode can be implemented as follows: if the prediction mode is unidirectional prediction, determine that there is a motion vector difference; or if the prediction mode is bidirectional prediction, and the reference image information includes a figure order count of a reference image of the current image block, determine the amount of motion vector differences based on the count of reference image picture order of the current image block; or if a figure order count of a first reference picture of the current picture block is greater than a figure order count of the current picture block, and a figure order count of a second reference picture of the current image is less than the figure order count of the current image block, determine that there are two motion vector differences; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference; or if the prediction mode is bidirectional prediction, encode a predefined amount of motion vector differences in at least one of the current image block bitstream, and slice layer header information, layer header information image, and sequence layer header information that is from the bitstream.

[0118] After the amount of motion vector differences is determined, the correspondence between the motion vector difference and the motion vector prediction value can be determined as follows: if there are two motion vector differences, separately use the two motion vector differences as motion vector differences corresponding to the first motion vector prediction value and the second motion vector prediction value; or if there is a motion vector difference, use the motion vector difference as a motion vector difference corresponding to the first motion vector prediction value, and define a motion vector difference corresponding to the second prediction value of motion vector as 0; or use the motion vector difference as a motion vector difference corresponding to the second motion vector prediction value, and set a motion vector difference corresponding to the first motion vector prediction value to 0; or use the motion vector difference as a motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value; or determine, based on a predefined correspondence, a correspondence between the motion vector difference and each of the first motion vector prediction value and the second motion vector prediction value, and encode the predefined correspondence into the stream of bits.

[0119] It should be noted that in a feasible deployment, the motion vector difference is used as the motion vector difference corresponding to each of the first motion vector prediction value and the second motion vector prediction value of movement. In other words, the motion vector difference is used again. This saves the consumption of coding the motion vector difference and improves the efficiency.

[0120] 404. Obtain, based on the match and the motion vector, a motion vector difference corresponding to the motion vector prediction value.

[0121] The motion vector of the current image block is determined in step 402, and therefore, the motion vector difference corresponding to the motion vector prediction value can be obtained by subtracting the motion vector prediction value of current image block motion vector.

[0122] 405. Encode the motion vector index and difference into a bit stream.

[0123] It can be learned that, according to the video encoding method described in Figure 4, only the index and motion vector difference need to be transmitted in the bit stream, and the motion information of the image block current can be restored on a decoding end. Therefore, a specific bitrate can be saved using the method in a case of the same video quality.

[0124] Figure 5 is a schematic structural diagram of a video encoding terminal disclosed in an embodiment of the present invention. As shown in Figure 5, the terminal device includes a processor 501 and memory 502. Memory 502 can be configured to store cache required by processor 501 to perform data processing, and can be further configured to provide data invoked by processor 501 to perform data processing and provide storage space for the obtained result data.

[0125] In this embodiment of the present invention, processor 501 is configured to perform the following operations by invoking program code stored in memory 502: build a list of candidate predicted motion information from a current image block, where candidate predicted motion information included in the list of candidate predicted motion information is motion information of an adjacent block of the current image block in either the time domain or the spatial domain; select, from the list of candidate predicted motion information, a piece of candidate predicted motion information as predicted motion information of the current image block based on a motion vector that is from the current image block and that is obtained during motion estimation, and determining an index of the candidate predicted motion information selected from the candidate predicted motion information list, where the predicted motion information includes reference image information and a motion vector prediction value; determining a match between a motion vector difference and the motion vector prediction value based on the predicted motion information; obtaining, based on the match and the motion vector, a motion vector difference corresponding to the motion vector prediction value; and encode the motion vector index and difference into a bit stream.

[0126] It can be learned that, according to the video coding terminal described in Figure 5, only the index and motion vector difference need to be transmitted in the bit stream, and the motion information of the image block current can be restored on a decoding end. Therefore, a specific bitrate can be saved using the method in a case of the same video quality.

[0127] Figure 6 is a schematic structural diagram of another video encoding terminal disclosed in an embodiment of the present invention. As shown in Figure 6, the terminal may include: a list building unit 601, configured to build a candidate predicted motion information list from a current picture block, where candidate predicted motion information included in the motion information list predicted candidate is motion information of an adjacent block of the current image block in the time domain or in the spatial domain; a selection unit 602, configured to select, from the list of candidate predicted motion information, a piece of candidate predicted motion information as predicted motion information of the current picture block based on a motion vector that is of the block current image and that is obtained during motion estimation, where the predicted motion information includes reference image information and a motion vector prediction value; a first determining unit 603 configured to determine an index of the candidate forecasted movement information selected from the candidate forecasted movement information list; a second determination unit 604 configured to determine a match between a motion vector difference and the motion vector prediction value based on the predicted motion information; an acquisition unit 605 configured to obtain, based on the match and the motion vector, a motion vector difference corresponding to the motion vector prediction value; and a first encoding unit 606 configured to encode the index and difference of motion vector into a bit stream.

[0128] It can be learned that, according to the video encoding terminal described in Figure 6, only the index and motion vector difference need to be transmitted in the bit stream, and motion information of the current picture block can be restored on a decoding end. Therefore, a specific bitrate can be saved using the method in a case of the same video quality.

[0129] Figure 7 is a schematic structural diagram of a video encoding/decoding apparatus or electronic device 50 disclosed in an embodiment of the present invention. The electronic apparatus or device may be incorporated into a codec in embodiments of the present invention. Details are described below.

[0130] The electronic device 50 can be, for example, a mobile terminal or user equipment in a wireless communications system. It should be understood that embodiments of the present invention can be implemented in any electronic device or apparatus that may need to encode and decode, or encode, or decode a video image.

[0131] The apparatus 50 may include a housing 30 which is used to protect the device and which is incorporated into the device. Apparatus 50 may additionally include a display 32 in the form of a liquid crystal display. In other embodiments of the present invention, the display can be any appropriate display technology suitable for displaying an image or a video. Apparatus 50 may further include a numeric keypad 34. In other embodiments of the present invention, any suitable data or user interface mechanism may be used. For example, a user interface could be deployed as a virtual keyboard, or a data entry system could be deployed as part of a touch display. The apparatus may include a microphone 36 or any appropriate audio input, and the audio input may be digital or analog signal input. Apparatus 50 may additionally include the following audio output device. The audio output device in this embodiment of the present invention can be any one of a headphone 38, a speaker, an analog audio output connection, or a digital audio output connection. Apparatus 50 may also include a battery 40. In other embodiments of the present invention, the device may receive power from any suitable mobile energy device, such as a solar cell, fuel cell, or clock generator. The apparatus may further include an infrared port 42 used for short range line-of-sight communication with another device. In other embodiments, apparatus 50 may additionally include any suitable short-range communication solution, such as a wireless Bluetooth connection or a wired USB connection.

[0132] The apparatus 50 may include a controller 56 or a processor that is configured to control the apparatus 50. The controller 56 may be connected to a memory 58. The memory in this embodiment of the present invention may store image data or audio data , and/or store an instruction implemented in the controller 56. The controller 56 can be further connected to a codec circuit 54 that is suitable for implementing encoding and decoding of audio and/or video data, or auxiliary encoding and decoding that are implemented by controller 56.

[0133] The apparatus 50 may additionally include a smart card 46, a card reader 48, such as a UICC and a UICC reader, which are configured to provide user information and which are suitable for providing authentication information used for authentication network and user authorization.

[0134] The apparatus 50 may additionally include a radio interface circuit 52. The radio interface circuit is connected to the controller and is suitable for generating, for example, a wireless communication signal used for communication with a communications network cellular phone, a wireless communication system, or a wireless local area network. The apparatus 50 may additionally include an antenna 44. The antenna is connected to the radio interface circuit 52, and is configured to send, to another apparatus (or a plurality of apparatuses), a radio frequency signal generated in the radio interface circuit 52, and receiving a radio frequency signal from the other apparatus (or the plurality of apparatuses).

[0135] In some embodiments of the present invention, the apparatus 50 includes a camera that is capable of recording or detecting single frames, and the codec 54 or the controller receives and processes these single frames. In some embodiments of the present invention, the apparatus may receive video image data to be processed from another device prior to transmission and/or storage. In some embodiments of the present invention, apparatus 50 can receive an image over a wireless or wired connection to encode/decode the image.

[0136] In this embodiment of the present invention, the codec 54 can be configured to perform the video decoding method described in Figure 1 or the video encoding method described in Figure 4

[0137] Figure 8 is a schematic structural diagram of a video encoding/decoding system disclosed in an embodiment of the present invention. As shown in Figure 8, the video encoding/decoding system 10 includes a source apparatus 12 and a destination apparatus 14. The source apparatus 12 generates encoded video data. Therefore, the source apparatus 12 may be referred to as a video encoding apparatus or a video encoding device. The destination apparatus 14 can decode the encoded video data generated by the source apparatus 12. Therefore, the destination apparatus 14 may be referred to as a video decoding apparatus or a video decoding device. The source apparatus 12 and the destination apparatus 14 may be instances of a video encoding/decoding apparatus or a video encoding/decoding apparatus. The source apparatus 12 and the destination apparatus 14 may include a wide range of apparatus, including a desktop computer, a mobile computing apparatus, a notebook-type computer (e.g., a laptop), a tablet-type computer, a set-top box, a handheld computer such as a smartphone, a television, a camera, a display device, a digital media player, a video game console, an in-vehicle computer, or the like.

[0138] The destination apparatus 14 may receive the encoded video data from the source apparatus 12 over a channel 16. The channel 16 may include one or more means and/or apparatus having the ability to move the encoded video data from the apparatus from source apparatus 12 to destination apparatus 14. In one instance, channel 16 may include one or more communication means enabling source apparatus 12 to directly transmit encoded video data to destination apparatus 14 in real time. In this case, the source apparatus 12 can modulate the encoded video data according to a communications standard (for example, a wireless communications protocol), and can transmit modulated video data to the destination apparatus 14. or more communication means may (m) include wireless and/or wired communication means, for example, a radio frequency (RF) spectrum or one or more physical transmission lines. The one or more means of communication may form part of a packet-based network (such as a local area network, a wide area network, or a global network (eg, the Internet)). The one or more means of communication may(m) include a router, switch, base station, or other device that drives communication between source apparatus 12 and destination apparatus 14.

[0139] In another case, the channel 16 may include a storage medium that stores the encoded video data generated by the source device 12. In this case, the destination device 14 can access the storage medium through disk access or card access. The storage media may include a variety of locally accessible data storage media, such as a Blu-ray, DVD, CD-ROM, flash memory, or other appropriate digital storage media configured to store encoded video data.

[0140] In another case, the channel 16 may include a file server or other intermediate storage device that stores the encoded video data generated by the source apparatus 12. In this case, the destination apparatus 14 can access, by transmission of streaming or download, the encoded video data stored on the file server or other intermediate storage device. The file server can be a type of server capable of storing the encoded video data and transmitting the encoded video data to the target apparatus 14. The file server in this case includes a web server (e.g. used for a website), a File Transfer Protocol (FTP) server, a network attached storage (NAS) appliance, and a local disk drive.

[0141] The target device 14 can access the encoded video data over a standard data connection (eg an Internet connection). Data connection case types include a wireless channel (for example a Wi-Fi connection) or a wired connection (for example a DSL or cable modem) which are suitable for accessing the encoded video data stored on the file server, or a combination thereof. Encoded video data can be transmitted from the file server via streaming, downloading or a combination thereof.

[0142] The technology of the present invention is not limited to a wireless application scenario. For example, the technology can be applied to encoding and decoding video in a variety of multimedia applications that support the following applications: open television broadcasting, wireless television broadcasting, satellite television broadcasting, streaming video broadcasting (by example, over the Internet), encoding video data stored on a data storage medium, decoding video data stored on a data storage medium, or other application. In some cases, the video encoding/decoding system 10 can be configured to support unidirectional or bidirectional video transmission, to support streaming video transmission, video playback, video broadcasting and/or a video call, and so on. apps.

[0143] In the case of Figure 8, the source apparatus 12 includes a video source 18, a video encoder 20 and an output interface 22. In some cases, the output interface 22 may include a modulator/demodulator (a modem) and/or a transmitter. Video source 18 may include a video capture device (e.g., a video camera), a video file including previously captured video data, a video input interface configured to receive video data from a video content, and/or a computer graphics system configured to generate video data, or a combination of the foregoing video data sources.

[0144] The video encoder 20 can encode video data from the video source 18. In some cases, the source apparatus 12 directly transmits the encoded video data to the destination apparatus 14 by using the output interface 22 The encoded video data may alternatively be stored on the storage media or on the file server, such that the target apparatus 14 accesses the encoded video data later to decode and/or play back the encoded video data.

[0145] In the example of Figure 8, the destination device 14 includes an input interface 28, a video decoder 30, and a display device 32. In some cases, the input interface 28 includes a receiver and/or a modem . The input interface 28 can receive the encoded video data via channel 16. The display apparatus 32 can be integrated with the target apparatus 14 or can be outside of the target apparatus 14. The display apparatus 32 typically displays video data decoded. The display apparatus 32 can include a variety of types of display apparatus, such as a liquid crystal display (LCD), a plasma display, an organic light emitting diode (OLED) display, or another type of display apparatus.

[0146] The video encoder 20 and the video decoder 30 can perform operations in accordance with a video compression standard (for example, the H.265 High Efficiency Video Coding standard) and can comply with a HEVC test model (HM). The ITU-TH.265 (V3) (04/2015) textual description of the H.265 standard is released on April 29, 2015 and can be downloaded from http://handle.itu.int/11.1002/1000/12455, and all content of the document is incorporated in its entirety by reference.

[0147] Alternatively, the video encoder 20 and the video decoder 30 may perform operations in accordance with other proprietary or industry standards. Standards include ITU-TH.261, ISO/IECMPEG-1Visual, ITU-TH.262 or ISO/IECMPEG-2Visual, ITU-TH.263, ISO/IECMPEG-4Visual, and ITU-TH.264 (also known as ISO/ IEC MPEG-4 AVC) that includes the following extensions: Scalable Video Coding/Decoding (SVC) and Multiview Video Coding/Decoding (MVC). It should be understood that the technology of the present invention is not limited to any specific encoding/decoding technology or standard.

[0148] Furthermore, Figure 8 is merely a case, and the technology of the present invention can be applied to a video encoding/decoding application (for example, single-sided video encoding or single-sided video decoding) which does not necessarily include any data communication between an encoding apparatus and a decoding apparatus. In other cases, data is retrieved from local memory, and the data is streamed using a network, or the data is operated on in a similar manner. The encoding apparatus can encode data and store the data in memory, and/or the decoding apparatus can retrieve data from memory and decode the data. In many cases, a plurality of devices that do not communicate with each other and that only encode data in memory, and/or that only retrieve data from memory and decode the data perform encoding and decoding.

[0149] The video encoder 20 and the video decoder 30 can be implemented as any one of a plurality of appropriate circuits, for example, one or more microprocessors, a digital signal processor (DSP), an application-specific circuit ( ASIC), a field-programmable gate array (FPGA), discrete logic, hardware, or any combination thereof. If the technology is partially or completely implemented using software, the apparatus may store a software instruction on an appropriate non-transient computer-readable storage medium, and one or more processors may be used to execute an instruction in hardware to carry out the technology of the present invention. Any of the foregoing (including hardware, software, a combination of hardware and software, and the like) may be considered one or more processors. Video encoder 20 and video decoder 30 may be included in one or more encoders or decoders, and each may be integrated as a part of a combined encoder/decoder (codec (CODEC)) of another apparatus.

[0150] The present invention may generally provide for the video encoder 20 "signaling" information to another apparatus (e.g., the video decoder 30) by use of a signal. The expression "signaling" in general can indicate a syntactic element and/or represent transfer of encoded video data. The transfer can occur in real time or in near real time. Alternatively, communication can take place over a period of time, for example, it can take place when the syntactic element is stored, during encoding, on a computer-readable storage medium using binary data obtained after encoding. The decoding apparatus can retrieve the syntactic element at any time after the syntactic element is stored on the medium.

[0151] It should be noted that the division of the apparatus is merely the division of the logic function, but the present invention is not limited to the aforementioned division, as long as corresponding functions can be implemented. Furthermore, specific names of the functional units are merely provided for the purpose of distinguishing the units from one another, but are not intended to limit the scope of protection of the present invention.

[0152] Furthermore, persons of ordinary skill in the art can understand that all or some of the steps of the method embodiments can be implemented by a program instructing related hardware. The program may be stored on a computer-readable storage medium. The storage media may include read-only memory, a magnetic disk, an optical disk, or the like.

[0153] The foregoing descriptions are only specific exemplary implementations of the present invention, but are not intended to limit the scope of protection of the present invention. Any variation or substitution readily perceived by experts in the art within the technical scope disclosed in the embodiments of the present invention will be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention will be subject to the scope of protection of the claims.

Claims (8)

1. A video decoding method, CHARACTERIZED in that it comprises: obtaining (101) from a bit stream an index of predicted motion information of a current picture block into a candidate predicted motion information list , wherein the predicted motion information comprises reference picture information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is motion information of an adjacent block of the picture block current in time domain or in space domain; querying (102) the list of candidate forecasted movement information based on the index, and using the found candidate forecasted movement information as the forecasted movement information; determining (103) a correspondence between a motion vector difference value and a motion vector prediction value, and obtaining the motion vector difference value from the bit stream; and correct (104) the motion vector prediction value by adding the motion vector difference value to get a motion vector of the current picture block, wherein when the prediction mode is bidirectional prediction, the motion information predicted comprises two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value, wherein there is only a motion vector difference value obtained from the bit stream and the motion vector difference value is reused to correct (104) the motion vector prediction values by adding the same motion vector difference value to the first motion vector prediction value and the second motion vector prediction value motion vector. 2. Method, according to claim 1, CHARACTERIZED by the fact that the determination (103) of a correspondence between a motion vector difference value and a motion vector prediction value comprises: determining a prediction mode of the current image block based on reference image information, wherein the prediction mode comprises unidirectional prediction or bidirectional prediction; determine a number of motion vector difference values based on the prediction mode; and determining the correspondence between the motion vector difference value and the motion vector prediction value based on the number of motion vector difference values. 3. Method, according to claim 2, CHARACTERIZED by the fact that determining a number of motion vector difference values based on the prediction mode comprises: if the prediction mode is unidirectional prediction, determining that there is a motion vector difference value; or if the prediction mode is bidirectional prediction, and the reference image information comprises a figure order count of a reference image, determine the amount of motion vector difference values based on the figure order count from the reference image of the current image block; or if the prediction mode is bidirectional prediction, get the amount of motion vector difference values from at least one of the bit stream of the current image block, and slice layer header information, image layer header, and sequence layer header information that is from the bitstream. 4. Method, according to claim 3, CHARACTERIZED by the fact that the determination of the amount of motion vector difference values based on the figure order count of the reference image of the current image block comprises: if a count figure order count of a first reference picture of the current picture block is greater than a figure order count of the current picture block, and a figure order count of a second reference picture of the current picture block is less that the figure order count of the current picture block, determine that there are two motion vector difference values; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference value. 5. Video decoding terminal, CHARACTERIZED in that it comprises: a first acquisition unit (301), configured to: obtain, from a bit stream, an index of predicted movement information of a current image block in a candidate predicted motion information list, wherein the predicted motion information comprises reference image information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is motion information movement of an adjacent block of the current image block in time domain or in space domain; a query unit (302), configured to: query the list of candidate forecasted movement information based on the index, and use the found candidate forecasted movement information as the forecasted movement information; a determining unit (303) configured to determine a match between a motion vector difference value and a motion vector prediction value; a second acquisition unit (304) configured to obtain the motion vector difference value from the bit stream; and an operating unit (305) configured to correct the motion vector prediction value by adding the motion vector difference value to obtain a motion vector of the current picture block, wherein when the prediction mode is one bidirectional prediction, the predicted motion information comprises two motion vector prediction values: a first motion vector prediction value and a second motion vector prediction value, where there is only one motion vector difference value obtained from the bit stream and the motion vector difference value is reused to correct the motion vector prediction values by adding the same motion vector difference value to the first motion vector prediction value and the second motion vector prediction value. 6. Terminal, according to claim 5, characterized by the fact that the determination unit (303) comprises: a first determination subunit, configured to determine a prediction mode of the current image block based on image information from reference, where the prediction mode comprises unidirectional prediction or bidirectional prediction; a second determination sub-unit configured to determine a number of motion vector difference values based on the prediction mode; and a third determining sub-unit configured to determine the correspondence between the motion vector difference value and the motion vector prediction value based on the number of motion vector difference values. 7. Terminal, according to claim 6, CHARACTERIZED by the fact that the second determination subunit is specifically configured to: if the prediction mode is unidirectional prediction, determine that there is a motion vector difference value; or if the prediction mode is bidirectional prediction, and the reference image information comprises a figure order count of a reference image, determine the amount of motion vector difference values based on the figure order count from the reference image of the current image block; or if the prediction mode is bidirectional prediction, get the amount of motion vector difference values from at least one of the bit stream of the current image block, and slice layer header information, image layer header, and sequence layer header information that is from the bitstream. 8. Terminal, according to claim 7, CHARACTERIZED by the fact that when determining the amount of motion vector difference values based on the figure order count of the reference image of the current image block, the second subunit of determination is specifically configured for: if a figure order count of a first reference image of the current image block is greater than a figure order count of the current image block, and a figure order count of a second image current image block's reference count is less than the current image block's figure order count, determine that there are two motion vector difference values; or if a figure order count of each reference picture of the current picture block is greater than a figure order count of the current picture block, or a figure order count of each reference picture of the current picture block is less than a figure order count of the current picture block, determine that there is a motion vector difference value.