Predication mode determination method and device based on HEVC (High Efficiency Video Coding)

Abstract

The invention provides a predication mode determination method and device based on HEVC (High Efficiency Video Coding). The method comprises the following steps: determining a direction predication mode according to the sum of gradient absolute values of an original pixel of a current block in horizontal, vertical, lower left and lower right directions; obtaining the closest N types of candidate prediction modes from a candidate prediction mode sub-set according to the direction predication mode; carrying out predication operation on the N types of candidate prediction modes according to the original pixel, and obtaining the cost, relative to the original pixel, of the current pixel under each candidate prediction mode; adding M types from the N types of candidate prediction modes into the candidate prediction mode sub-set according to the N costs; predicating and encoding the current block by using a reconstructed peripheral pixel according to each predication mode in the candidate prediction mode sub-set; and obtaining a selected predication mode from the candidate prediction mode sub-set. The operation complexity of a determination process of the predication mode is greatly reduced and the operation amount is reduced.

Description

Technical field [0001] The present invention relates to the technical field of video processing, in particular to a method and device for determining a prediction mode based on HEVC. Background technique [0002] With the rapid development of technology, the increase of online video and the increase of TV channels have gradually enriched people's lives. In the transmission of video, the video encoding and decoding method is mainly used to effectively encode the video at the sending end, that is, the compression process, to convert a file in a video format into another video format file, thereby saving bandwidth and facilitating transmission. Then the video is effectively decoded at the receiving end, that is, the decompression process, so that the video can be played correctly. [0003] At present, the most important coding and decoding standards for video streaming are H.261, H.263, H.264, etc. of the ITU, as well as the M-JPEG of the Motion Picture Experts Group and the MPEG se...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for determining a prediction mode based on HEVC, which is used to solve the defects of complex calculation and excessive calculation amount in the HEVC intra prediction mode determination process in the prior art, reduce the calculation amount, and improve the efficiency of determining the prediction mode

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