A Fast Decision-Making Method for Intra Prediction Modes in Video Coding

A technology of intra-frame prediction mode and prediction mode, which is applied in the field of video coding, can solve the problems of not being able to make full use of angle mode correlation, etc., and achieve the effect of reducing the number of modes, reducing the number of modes, and reducing computational complexity

Active Publication Date: 2018-07-03
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

However, these methods cannot make full use of the correlation between angle modes, and the intra prediction process of HEVC still has a lot of room for speed-up

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Embodiment Construction

[0037] Below in conjunction with accompanying drawing, further describe the present invention through embodiment, but do not limit the scope of the present invention in any way.

[0038] The present invention provides a fast decision-making method for an intra-frame prediction mode in video coding. By judging the prediction orientation, the method uses the correlation of the angle mode and the size of the prediction unit PU to construct a candidate list of prediction modes to reduce the number of prediction modes for rate-distortion optimization. number, thereby reducing the computational complexity of intra-frame prediction and increasing the video encoding speed.

[0039] The following embodiments describe the implementation process of intra-frame prediction for encoding a luma block of the current frame, and construct a prediction block with the smallest difference from the original luma block. In order to facilitate understanding of the embodiments of the present invention...

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Abstract

Disclosed in the present invention is a rapid decision making method for intra-frame prediction mode in video coding. The number of prediction modes of performing rate-distortion optimization is reduced by means of determining a prediction orientation and constructing a PML using a correlation of an angle mode and a prediction unit (PU) size; comprising: predicting orientations in a principal prediction orientation set, and selecting first three modes of optimal rate-distortion cost; adding a mode in an adjacent direction of the first three modes, a Planar mode and a DC mode into a PML; calculating the rate-distortion cost of the modes in the PML; adding modes in an MPM into the PML without repetition; performing final rate-distortion optimization; and using the mode with the lowest rate-distortion cost as an optimal mode of intra-frame prediction of a current PU block. The present invention may reduce operation complexity of intra-frame prediction, and may improve speed of video coding.

Description

technical field [0001] The present invention relates to a video encoding method, in particular to a method for fast decision-making of an intra-frame prediction mode in video encoding. Background technique [0002] The key problem solved by video coding technology is the coding and compression of massive digital video data. Predictive coding is one of the core technologies in video coding. The coding algorithm uses the spatial correlation between adjacent pixels of the video signal and the temporal correlation between adjacent images to perform predictive coding, eliminates redundancy in the video signal, and achieves high-efficiency compression. The new generation of video coding technology adopts two methods of intra-frame prediction and inter-frame prediction. Among them, intra-frame prediction uses spatial correlation to predict uncoded pixels using coded pixels to eliminate spatial redundancy in video signals. By analyzing the information of the current coding block ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/11H04N19/593H04N19/147H04N19/136H04N19/176
CPCH04N19/11H04N19/593
Inventor 董胜富王萌王文敏王振宇王荣刚李英赵辉
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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