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A method and device for encoding and decoding

An encoding method and encoding technology, applied in the field of encoding and decoding, can solve problems such as low encoding gain

Active Publication Date: 2022-05-17
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The skip (skip) and direct (direct) coding methods in AVS3 are currently being developed without motion search, and only the motion vector (motion vector, MV) is derived in the surrounding blocks that have been coded. Among them, skip coding Residual information is not transmitted, and residual information needs to be transmitted in direct encoding, and skip encoding and direct encoding are only for 2N×2N mode, and the encoding gain is low

Method used

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  • A method and device for encoding and decoding
  • A method and device for encoding and decoding
  • A method and device for encoding and decoding

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Embodiment Construction

[0055] The technical solution in this application will be described below with reference to the accompanying drawings.

[0056] In order to better understand the technical solution of the embodiment of the present application, the image encoding process involved in the embodiment of the present application is first introduced below.

[0057] figure 1 It is a schematic diagram of the image coding process, which mainly includes intra prediction, inter prediction, transform, quantization, entropy encoding, and in-loop filtering (in- loop filtering) and other links.

[0058] First, the image is divided into blocks and intra-frame and inter-frame prediction are performed. After the residual is obtained, transform and quantization are performed, and finally entropy coding is performed and the code stream is output. Here, the block is an array of M×N size composed of pixels (M is not necessarily equal to N), and the pixel value of each pixel position is known.

[0059] The intra p...

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Abstract

The present application provides a coding and decoding method and device. The coding and decoding method includes: an encoding device derives a derived block according to a coded block to be encoded; Encoding to obtain first encoding information; the encoding device determines a code stream according to the first encoding information, the code stream includes indication information, and the indication information is used to indicate that the first encoding information adopts a skip encoding mode for the derived block or direct coding mode; the decoding device parses the code stream to obtain the indication information; the decoding device decodes the derivative block in skip coding mode or direct coding mode. The codec method in the embodiment of the present application helps to improve the coding gain.

Description

technical field [0001] The present application relates to the communication field, and more specifically, to a codec method and device. Background technique [0002] The Joint Video Exploration Team (JVET) is developing a new generation of video coding compression standard H.266 / Versatile Video Coding (VVC). Audio and video coding standard 3 (audio video coding standard 3, AVS3) is developing a new generation of standard AVS3 is generally based on this framework structure. In the latest video coding standard H.266 / VVC standard draft 2.0 and AVS3 standard draft that are being developed, multiple coding tools are adopted, which are distributed in various modules of prediction, transformation, quantization, loop filtering and entropy coding. [0003] The skip (skip) and direct (direct) coding methods in AVS3 are currently being developed without motion search, and only the motion vector (motion vector, MV) is derived in the surrounding blocks that have been coded. Among them, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/103H04N19/176
CPCH04N19/103H04N19/176
Inventor 余全合郑建铧王力强何芸
Owner HUAWEI TECH CO LTD