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Rapid HEVC intra-frame prediction method based on SATD

An intra-frame prediction and fast technology, applied in digital video signal modification, electrical components, image communication, etc., can solve the problems of no more effective algorithm, algorithm inapplicability, etc., to achieve the effect that is beneficial to hardware and software, and conducive to realization

Active Publication Date: 2014-04-30
HUAQIAO UNIVERSITY
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AI Technical Summary

Problems solved by technology

However, this algorithm is not suitable for intra-frame, and there is currently no effective algorithm for fast division of coding units CU within a frame.

Method used

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  • Rapid HEVC intra-frame prediction method based on SATD
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  • Rapid HEVC intra-frame prediction method based on SATD

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Embodiment Construction

[0027] A SATD-based HEVC fast intra-frame prediction method of the present invention, such as figure 1 As shown, the largest coding unit CU is called CTU (Coding Tree Unit). First, the CTU is divided. The quadtree division process is as follows: When it is not divided, the size of the coding unit CU is 64×64. When the depth is 0; then perform predictive coding on it to obtain the rate-distortion cost, and then divide the coding unit CU into four sub-coding units CU, and the size of each sub-coding unit CU is 32×32. At this time, the depth is 1, then perform predictive coding on these four sub-CUs respectively, and also get their RDO (Rate-Distortion Optimization) cost, and divide it recursively; when the size of the sub-coding unit CU is 8×8, that is, the depth at this time is At 3 o'clock, the segmentation process is ended; then the segmented coding unit CU is pruned, that is, the cost of each coding unit CU obtained is compared accordingly, so as to determine the optimal cod...

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Abstract

The invention provides a rapid HEVC intra-frame prediction method based on the SATD. The rapid HEVC intra-frame prediction method based on the SATD comprises the steps that firstly, a group of robust threshold values are obtained through statistics and can be suitable for coding unit (CU) blocks of different sizes and different QPs, and when the smallest SATD value of the current CU is smaller than the given threshold value, the partition process of the current CU is ended. By the adoption of the rapid HEVC intra-frame prediction method based on the SATD, the needed partition depth of the HEVC intra-frame CU can be accurately obtained through locating, the coding complexity of HEVC is greatly reduced, and real-time application of an HEVC coder is facilitated.

Description

technical field [0001] The invention belongs to the field of video information processing in the field of digital video communication, and in particular relates to a fast intra-frame prediction method based on the SATD video coding standard (HEVC). technical background [0002] With the continuous advancement of technology, people have higher and higher requirements for visual and audio quality, and high-definition video and ultra-high-definition video have begun to receive widespread attention. The second-generation video coding standard H.264 / AVC created 10 years ago can no longer meet people's requirements for practical applications. The industry and academic circles are increasingly eager for a new generation of video coding standards. In this situation, the two major standards organizations, VCEG and MPEG, began to cooperate in the development. In January 2010, a joint organization called JCT-VC (Joint Collaborative Team on Video Coding) was established to jointly formu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/96H04N19/103H04N19/147H04N19/557
Inventor 林其伟许东旭
Owner HUAQIAO UNIVERSITY
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