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Method and device for coding and decoding intra-frame prediction mode

A technology of intra-frame prediction mode and prediction mode, which is applied in the field of video coding and decoding, and can solve the problems of high code stream proportion of intra-frame prediction mode

Active Publication Date: 2016-02-24
BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides an intra-frame prediction mode codec method and device, which solves the problem that the intra-frame prediction mode occupies a relatively high proportion of the code stream in the process of video codec

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0038] figure 1 Shown is a flowchart of an intra prediction mode encoding method provided by an embodiment of the present invention. Such as figure 1 The illustrated intra prediction mode encoding methods include:

[0039] Step S101: Number all intra prediction modes. The AVS2 coding standard provides us with 33 intra-frame prediction modes (hereinafter referred to as prediction modes), including 3 non-angle prediction modes, specifically: DC mode,...

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Abstract

The mode of execution of the invention relates to a method for coding and decoding an intra-frame prediction mode. The coding method comprises the steps of obtaining prediction mode numbers of a left edge block and an upper edge block in a current block separately; establishing a prediction list including five kinds of most probable prediction mode numbers of the current block according to the prediction mode numbers of the left edge block and the upper edge block; judging whether the optimal prediction mode number of the current block is within the prediction list or not; if so, only needing to code a few bit numbers; or otherwise, coding the adjusted optimal prediction mode number. The mode of execution of the invention also relates to a device for coding and decoding the intra-frame prediction mode. According to the method and the device for coding and decoding the intra-frame prediction mode, the problem of high code stream proportion of the intra-frame prediction mode in the video coding and decoding process can be solved.

Description

technical field [0001] The present invention relates to the technical field of video encoding and decoding, in particular to an intra-frame prediction mode encoding and decoding method and equipment. Background technique [0002] In the process of video encoding and decoding, in order to reduce distortion as much as possible, an effective method is to increase the types of intra-frame prediction modes, but at the same time, it will cause the proportion of intra-frame prediction mode coding in the entire code stream to continue to increase. increase. [0003] Considering the strong correlation between the prediction mode of the current block and the prediction modes of the left block and the upper block, AVS2 directly uses the best prediction mode of the left block and the upper block of the current block as the prediction mode of the current block. Two most probable prediction modes, then if the best prediction mode of the current block is among the two most probable predic...

Claims

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Application Information

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IPC IPC(8): H04N19/567H04N19/593
Inventor 段争志夏昌盛旷开智昝劲文周文博
Owner BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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