Fast Selection Method of HEVC Prediction Mode Based on Spatial Correlation

Abstract

The invention discloses a method for quickly selecting an HEVC prediction mode based on spatial correlation, which mainly solves the problems of slow speed and poor real-time performance in the prior art. The implementation steps are: 1. Input the video sequence, count the probability relationship between the best prediction mode of the coding unit in the first 10 inter-coded frames and the best prediction mode of the best spatial reference coding unit, and construct a probability table; 2. From Starting from the 11th inter-frame coding frame, for the time domain homogeneous coding unit with the best spatial domain reference coding unit, find the best prediction mode of the best spatial domain reference coding unit; 3. Select such that the sum of the probabilities is greater than the probability threshold and The prediction mode with the least number is used as the candidate prediction mode of the coding unit; 4. The coding unit is coded according to the candidate prediction mode to obtain the best prediction mode, and update the probability table. The invention utilizes spatial domain correlation, skips redundant prediction modes, improves the speed of prediction mode selection, and can be used for real-time video applications.

Description

technical field [0001] The invention belongs to the field of video processing, and in particular relates to a method for quickly selecting a prediction mode, which can be used in the process of selecting a prediction mode for an inter-frame coding unit in the high-efficiency video coding HEVC standard. Background technique [0002] With the development and maturity of high-definition video technology, a large number of high-definition videos have emerged in people's daily life. However, the large amount of data brought by high resolution makes high-definition video more demanding on the compression performance of video codec algorithms. The previous video codec standards can no longer meet the compression performance requirements of high-definition video, and the next generation of video compression coding standards has emerged. At the first meeting of the joint video coding group JCT-VC held in Dresden, Germany in April 2010, the name of the new generation video coding sta...

AI Technical Summary

Problems solved by technology

[0011] Compared with the original HEVC method, the CFM method and the ESD method have greatly improved the encoding time, but only skipped the prediction mode in advance for relatively flat coding units, and did not for many coding units in motion. processing, and the encoding speed needs to be improved

Jong-Hyeok Lee's method divides the motion area into areas with different motion characteristics. The CFM method and the ESD method have made some progress in the time and mode skipped areas, but the method is relatively complicated and the time still needs to be improved.

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