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Video encoder, video decoder and corresponding method

A technology of video encoder and encoding method, which is applied in the fields of digital video signal modification, electrical components, image communication, etc., and can solve the problems of slow encoding/decoding and large memory.

Pending Publication Date: 2020-03-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the motion vector prediction method based on the motion model reads more memory, resulting in slower encoding / decoding speed

Method used

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  • Video encoder, video decoder and corresponding method
  • Video encoder, video decoder and corresponding method
  • Video encoder, video decoder and corresponding method

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Embodiment Construction

[0063] Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

[0064] Non-translational motion model prediction refers to the use of the same motion model at the codec end (for example, at both ends of the video encoder and video decoder) to derive the motion compensation unit (also called sub-block) of each sub-motion compensation unit (also called sub-block) in the current encoding / decoding block. Motion information (such as a motion vector) performs motion compensation according to the motion information of the sub-motion compensation unit to obtain a prediction block, thereby improving prediction efficiency. In the process of deriving the motion information of the motion compensation unit (also called sub-block) in the current encoding / decoding block, it involves the motion vector prediction based on the motion model. At present, the upper left of the adjacent affine decoding block of the cur...

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Abstract

The embodiment of the invention provides a video encoder, a video decoder and a corresponding method, and the method comprises the steps: analyzing a code stream, so as to obtain an index which is used for indicating a target candidate motion vector group of a current decoding block; according to the index, determining a target candidate motion vector group from the candidate motion vector list, wherein if the first adjacent affine decoding block is a four-parameter affine decoding block and the first adjacent affine decoding block is positioned an upper CTU of the current decoding block, thecandidate motion vector list comprises a first group of candidate motion vector prediction values, and the first group of candidate motion vector prediction values are obtained based on a left lower control point and a right lower control point of the first adjacent affine decoding block; and obtaining a pixel prediction value of the current decoding block based on the target candidate motion vector group. By adopting the embodiment of the invention, memory reading can be reduced, so that the encoding and decoding performance is improved.

Description

technical field [0001] The present application relates to the technical field of video coding and decoding, and in particular to a method and device for inter-frame prediction of video images, as well as a corresponding encoder and decoder. Background technique [0002] Digital video capabilities can be incorporated into a wide variety of devices, including digital television, digital broadcast systems, wireless broadcast systems, personal digital assistants (PDAs), laptop or desktop computers, tablet computers, electronic book readers, Digital cameras, digital recording devices, digital media players, video game devices, video game consoles, cellular or satellite radiotelephones (so-called "smart phones"), video teleconferencing devices, video streaming devices and the like . Digital video devices implement video compression techniques such as those defined in MPEG-2, MPEG-4, ITU-T H.263, ITU-T H.264 / MPEG-4 Part 10 Advanced Video Coding (AVC), Video compression techniques...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/567H04N19/52H04N19/176
CPCH04N19/567H04N19/52H04N19/176
Inventor 陈焕浜杨海涛陈建乐
Owner HUAWEI TECH CO LTD