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Intra-frame prediction method and device

A technology of intra-frame prediction and intra-frame prediction mode, which is applied in digital video signal modification, electrical components, image communication, etc., and can solve the problem of video size becoming a problem

Pending Publication Date: 2022-04-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the video can also be an issue when storing the video on a storage device due to potentially limited memory resources

Method used

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  • Intra-frame prediction method and device
  • Intra-frame prediction method and device

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Experimental program
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Embodiment 1

[0295] In this embodiment, according to multiple a posteriori intra prediction modes of multiple reconstructed image blocks in the surrounding area and multiple prediction error values ​​corresponding to the multiple a posteriori intra prediction modes, the multiple values ​​of the current block are determined. A priori candidate intra prediction modes and a plurality of probability values ​​corresponding to the plurality of a priori candidate intra prediction modes.

[0296] Figure 8 It is a flowchart of a process 800 of the intra prediction method in the embodiment of the present application. The process 800 can be executed by the video encoder 20 or the video decoder 30 , specifically, it can be executed by the intra prediction units 254 and 354 of the video encoder 20 or the video decoder 30 . Process 800 is described as a series of steps or operations, it should be understood that process 800 may be performed in various orders and / or concurrently, and is not limited to ...

Embodiment 2

[0320] In this embodiment, multiple a priori intra prediction modes of the multiple reconstructed image blocks in the surrounding area and multiple probability values ​​corresponding to the multiple a posteriori intra prediction modes are used to determine multiple prior intra prediction modes of the current block. a priori candidate intra prediction modes and a plurality of probability values ​​corresponding to the plurality of a priori candidate intra prediction modes.

[0321] Figure 10 It is a flowchart of a process 1000 of the intra prediction method in the embodiment of the present application. The process 1000 can be executed by the video encoder 20 or the video decoder 30 , specifically, it can be executed by the intra prediction units 254 and 354 of the video encoder 20 or the video decoder 30 . Process 1000 is described as a series of steps or operations, and it should be understood that process 1000 may be performed in various orders and / or concurrently, and is no...

Embodiment 3

[0344] In this embodiment, according to the respective optimal intra prediction modes of multiple reconstructed image blocks in the surrounding area, a plurality of a priori candidate intra prediction modes of the current block and corresponding to a plurality of a priori candidate intra prediction modes are determined. multiple probability values ​​for .

[0345] Figure 11 It is a flowchart of a process 1100 of the intra prediction method in the embodiment of the present application. The process 1100 can be executed by the video encoder 20 or the video decoder 30 , specifically, it can be executed by the intra prediction units 254 and 354 of the video encoder 20 or the video decoder 30 . Process 1100 is described as a series of steps or operations, and it should be understood that process 1100 may be performed in various orders and / or concurrently, and is not limited to Figure 11 The order of execution shown. Assuming that a video data stream with multiple image frames i...

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Abstract

The invention provides an intra-frame prediction method and device. Relates to the technical field of video or image compression based on artificial intelligence (AI), in particular to the technical field of video compression based on a neural network. The method comprises the following steps of: acquiring an intra-frame prediction mode or texture distribution of each of P reconstructed image blocks in a peripheral region of a current block; obtaining Q prior candidate intra-frame prediction modes and Q probability values of the current block according to the intra-frame prediction modes or texture distribution of the P reconstructed image blocks; obtaining M weight factors corresponding to the M priori candidate intra-frame prediction modes according to the M probability values corresponding to the M priori candidate intra-frame prediction modes; respectively executing intra-frame prediction according to the M priori candidate intra-frame prediction modes to obtain M predicted values; and performing weighted summation according to the M predicted values and the corresponding M weight factors to obtain a predicted value of the current block. According to the invention, the accuracy of intra-frame prediction can be improved, the error of intra-frame prediction can be reduced, and the RDO efficiency of intra-frame prediction can be improved.

Description

technical field [0001] The embodiments of the present application relate to the technical field of video or image compression based on artificial intelligence (artificial intelligence, AI), and in particular, to an intra prediction method and device. Background technique [0002] Video coding (video encoding and decoding) is widely used in digital video applications such as broadcast digital TV, video transmission over the Internet and mobile networks, real-time session applications such as video chat and video conferencing, DVD and Blu-ray discs, video content acquisition and editing systems and security applications for camcorders. [0003] Large amounts of video data need to be described even in the case of short movies, which can cause difficulties when the data is to be sent or otherwise transmitted over a network with limited bandwidth capacity. Therefore, video data is usually compressed before being transmitted over modern telecommunications networks. Since memory ...

Claims

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Application Information

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IPC IPC(8): H04N19/159H04N19/139H04N19/176H04N19/567
CPCH04N19/176H04N19/11H04N19/593H04N19/149H04N19/136H04N19/159H04N19/172H04N19/42G06N3/08
Inventor 杨海涛宋楠陈旭马祥陈焕浜赵寅
Owner HUAWEI TECH CO LTD
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