Fast and efficient video coding intra mode determining method

A high-efficiency video, intra-frame prediction mode technology, applied in the field of image communication, can solve problems such as large redundancy

Inactive Publication Date: 2013-10-02
EAST CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

All of the above methods have reduced the computational complexity of HEVC video intra-frame coding to a certain extent, but there is still a large redundancy in the current HEVC video coding intra-frame mode selection.

Method used

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  • Fast and efficient video coding intra mode determining method

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Embodiment 1

[0050] 1. Open the programs of the two algorithms at the same time and set the same configuration file. The reference software selects HM8.0, and the quantization step (QP) value is 22, 27, 32 and 37 respectively. The present invention will be compared with the method of the reference software algorithm HM8.0 of the HEVC video coding standard. And its three kinds of video coding performance: bit rate, peak signal-to-noise ratio (PSNR) and video coding time (PSNR reflects the objective video quality of the video, video coding time reflects the computational complexity of coding), comparative analysis, comparison The performance gap is evaluated with the following three indicators:

[0051]

[0052] where BR pro ,P pro and T pro Respectively the bit rate, PSNR and video encoding time of the algorithm of the present invention, BR ref ,P ref and T ref are the bit rate, PSNR and video encoding time of the HM8.0 standard algorithm, , and

[0053] are respectively the di...

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Abstract

The invention discloses a fast and efficient video coding intra mode determining method. The fast and efficient video coding intra mode determining method includes the steps of prediction manner configuration and prediction mode selection. According to the prediction mode selection, the correlations between brightness intra prediction modes of a current CU layer and brightness intra prediction modes of CU layers above the current CU layer, the correlation between CBF and TU segmentation depth, and the correlations between chroma intra prediction modes of adjacent CU layers are utilized, and redundant intra mode prediction can be skipped, and therefore, coding computation complexity can be decreased. According to the correlation between a cost function and RDcost and the correlations between chroma intra prediction modes and brightness intra prediction modes, a minimum-cost prediction mode and an optimal brightness prediction mode in RMD are added in a brightness and chroma intra prediction process, and therefore, video coding efficiency and video quality can be ensured. Compared with high efficiency video coding (HEVC) standards in the prior art, the fast and efficient video coding intra mode determining method of the invention can greatly decrease coding computation complexity under the premise that bit rate and video quality are almost unchanged.

Description

technical field [0001] The invention relates to the technical problem of video coding intra-frame prediction in the field of image communication, and relates to a fast and high-efficiency video coding intra-frame mode judgment method. Background technique [0002] The current international video coding standard is Advanced Video Coding (H.264 / AVC). Compared with previous video coding standards, this video coding standard has greatly improved video coding performance. With the wide application of high-definition video technology, the maximum block size of 16×16 in H.264 / AVC is no longer suitable for encoding high-definition video. To this end, the International Organization for Standardization-International Electrotechnical Commission / Moving Picture Experts Group (ISO-IEC / MPEG) and the International Telecommunication Union Telecommunication Standardization Organization / Video Coding Experts Group (ITU-T / VCEG) have been established. Video Coding Joint Development Team (JCT-VC)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32
Inventor 钟国韵刘梅锋徐洪珍吴有用何月顺
Owner EAST CHINA UNIV OF TECH
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