HEVC inter-frame prediction mode fast judgment method based on zero block distribution

Abstract

The invention provides a HEVC inter-frame prediction mode fast judgment method based on zero block distribution for the inter-frame prediction process. The method is applied to the inter-frame PU prediction mode judgment, and comprises the following steps: sufficiently utilizing the zero block distribution information in a residual block after performing the transformation and quantization on the CU block; analyzing to obtain the zero block number contained in the CU and the zero block distribution feature by counting a series of video sequences that the image texture becomes complex from the simple; performing classification screening on the PU prediction mode according to the relevance between the zero block number contained in the CU and the zero block distribution feature and the PU prediction mode, thereby maximally improving the coding efficiency while maximally guaranteeing the coding quality. The algorithm complexity can be greatly reduced, and the zero block can be precisely judged, and the algorithm accuracy is improved.

Description

technical field [0001] The present invention relates to a new method for HEVC (High Efficiency Video Coding) inter-frame mode determination, in particular to a method for fast determination of HEVC inter-frame prediction mode based on zero block distribution. Background technique [0002] HEVC is a new generation of video coding standard. It was proposed to meet people's new requirements for high-definition, ultra-high-definition, 3D and mobile wireless communications. It officially became an international standard in January 2013. Compared with the previous generation of video coding standard H.264, which has been widely used, HEVC inter-frame prediction introduces new technologies, including motion merge technology (MotionMerge) and advanced motion vector prediction (Advance Motion Vector Prediction, AMVP) and adding non- Although the symmetric prediction mode increases the accuracy of the inter-frame prediction and significantly saves the number of coding bits and the qua...

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Problems solved by technology

[0003] Aiming at this improvement perspective, many scholars have conducted research. The most commonly used methods to reduce PU mode traversal and reduce complexity are: using time-space domain correlation method, CU depth correlation method, absolute difference sum method and sample adaptive biasing method. These methods can reduce the number of PU mode traversals and coding complexity to a certain extent, but for HEVC inter-frame predictive coding, there is still room for further improvement.

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