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A bidirectional inter-frame prediction method and device

An inter-frame prediction and inter-frame prediction mode technology, applied in the field of video coding and decoding, can solve the problems of few bi-directional inter-frame prediction modes and unfavorable coding efficiency, and achieve the effect of adding optional bi-directional inter-frame prediction modes.

Active Publication Date: 2018-02-09
BEIJING QIYI CENTURY SCI & TECH CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that in the prior art, the forward inter-frame prediction and the backward inter-frame prediction are performed in units of the original predicted image block. For a bidirectional inter-frame prediction, the inter-frame prediction mode corresponding to the forward inter-frame prediction and The inter-frame prediction modes corresponding to the backward inter-frame prediction are the same. In this way, when there are N available inter-frame prediction modes for the target coding block in practical applications, only N bidirectional inter-frame prediction modes are available for the target coding block to choose from. The optional bidirectional There are fewer inter-frame prediction modes, and the coding efficiency is not improved by using

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  • A bidirectional inter-frame prediction method and device

Examples

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example 1

[0122] Example 1: see Figure 5 , providing a schematic diagram of performing bi-directional inter-frame prediction on coding blocks in the prior art.

[0123] In the prior art,

[0124] Perform inter-frame prediction in each reference frame included in List0 to obtain the forward inter-frame prediction result of PU0 in the forward inter-frame prediction mode;

[0125] Perform inter-frame prediction in each reference frame included in List1, and obtain the backward inter-frame prediction result of PU0 in the backward inter-frame prediction mode;

[0126] Perform inter-frame prediction in each reference frame included in List0 to obtain the forward inter-frame prediction result of PU1 in the forward inter-frame prediction mode;

[0127] Perform inter-frame prediction in each reference frame included in List1, and obtain the backward inter-frame prediction result of PU1 in the backward inter-frame prediction mode;

[0128] Finally, according to the forward inter prediction re...

example 2

[0129] Example 2: see Figure 6 , provides a schematic diagram of bi-directional inter-prediction of a coded block.

[0130] Assume that the inter prediction modes included in the set of available inter prediction modes for backward prediction are Inter_Nx2N mode and Inter_2NxN mode, and in the Inter_Nx2N mode, the two original prediction image blocks corresponding to the target coding block are PU2 and PU3 respectively, then this In the scheme provided by the embodiment of the invention,

[0131] Perform inter-frame prediction in each reference frame included in List0 to obtain the forward inter-frame prediction result of PU0 in the forward inter-frame prediction mode;

[0132] Perform inter-frame prediction in each reference frame included in List0 to obtain the forward inter-frame prediction result of PU1 in the forward inter-frame prediction mode;

[0133] Obtaining the forward inter prediction result of the target coding block according to the forward inter prediction r...

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Abstract

The embodiment of the present invention discloses a bidirectional inter-frame prediction method and device, which relate to the technical field of video coding and decoding, including: obtaining the first reference frame list corresponding to the first prediction direction, the first set of available inter-frame prediction modes, and the second prediction The second reference frame list corresponding to the direction, and the second available inter-frame prediction mode set; according to the first available inter-frame prediction mode set, obtain the target inter-frame prediction mode M of the target coding block BT; obtain BT under M for the first prediction The inter prediction result of the direction; according to the obtained inter prediction result for the first prediction direction, respectively obtain the inter prediction mode of BT for the second prediction direction under each inter prediction mode in the second available inter prediction mode set Prediction result; obtain the bidirectional inter-frame prediction result of BT under M. Applying the solution provided by the embodiment of the present invention to perform bi-directional inter-frame prediction adds an optional bi-directional inter-frame prediction mode.

Description

technical field [0001] The present invention relates to the technical field of video encoding and decoding, in particular to a bidirectional inter-frame prediction method and device. Background technique [0002] Since there is a strong time correlation between several consecutive frames of video in the video, when performing video encoding, the time correlation between each video frame is often used to reduce the redundancy between video frames and achieve the purpose of compressing data. The time correlation between the current video frame and other video frames in the video not only shows that there is a time correlation between the current video frame and the video frames encoded before it, but also between the current video frame and the video frames encoded after it. There is a temporal correlation between them, based on this, when performing video encoding, bi-directional inter-frame prediction can be considered to obtain better encoding effect. [0003] As the name ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/577H04N19/503
Inventor 贺坚强
Owner BEIJING QIYI CENTURY SCI & TECH CO LTD