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Shvc Enhancement Layer Video Coding Method Based on Rapid Selection of Prediction Mode

A predictive mode and fast selection technology, applied in the field of video processing, can solve problems such as time-consuming, reduce the number, reduce the encoding complexity, and increase the encoding rate.

Active Publication Date: 2017-06-13
XIDIAN UNIV
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Problems solved by technology

However, this method still has a large number of video frames that do not use the fast method, and the encoding process still consumes a lot of time

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  • Shvc Enhancement Layer Video Coding Method Based on Rapid Selection of Prediction Mode
  • Shvc Enhancement Layer Video Coding Method Based on Rapid Selection of Prediction Mode
  • Shvc Enhancement Layer Video Coding Method Based on Rapid Selection of Prediction Mode

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Embodiment Construction

[0036] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0037] The present invention is carried out on SHM6.1, and the configuration condition of video sequence has three kinds of low time delay B, low time delay P and random access, and the quantization step size QP in every case is as shown in Table 1:

[0038] Table 1 Quantization step size under three video sequence configuration conditions

[0039] Video sequence configuration conditions Base layer quantization step size QP0 Enhancement layer quantization step size QP1 low latency B 20～25，26～29，30～33，34～40 QP0+0~QP0+1, QP0+2~QP0+3 low latencyP 20～25，26～29，30～33，34～40 ...

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Abstract

The invention discloses an SHVC (scalable high efficiency video coding) enhancement layer video coding method based on rapid prediction mode selection, mainly solving the problem of low code rate of an enhancement layer in SHVC standards. The SHVC enhancement layer video coding method includes: (1), determining a correlation between a basic layer and the enhancement layer, and acquiring a prediction mode probability statistical table by probability statistics; (2), selecting a rough candidate prediction mode of the enhancement layer according to the probability statistical table; (3) respectively coding previous n frames of a video sequence by means of the rough candidate prediction mode and the Yin method to acquire a rate-distortion performance estimator BD-PSNR; (4), adjusting the rough candidate prediction mode according to the rate-distortion performance estimator BD-PSNR to acquire a final candidate prediction mode; (5), coding the video sequence according to the final candidate prediction mode. The SHVC enhancement layer video coding method has the advantages that on the premise of guaranteeing video rate-distortion performance, coding difficulty is effectively lowered and coding time is reduced; the SHVC enhancement layer video coding method can be applied to real-time video application.

Description

technical field [0001] The invention belongs to the field of video processing, in particular to a fast selection method of a prediction mode, which can be used for video compression. Background technique [0002] In January 2013, JCT-VC, a video coding joint working group established by two international video coding organizations, the Motion Picture Experts Group MPEG and the Video Coding Experts Group VCEG, developed a new international video coding standard HEVC that replaces H.264 / AVC. However, the encoding standard lacks flexibility. When different terminals have different requirements for video resolution and frame rate, the input video stream must be encoded multiple times. In order to solve this problem, the scalable video coding technology is extended on the basis of the high-efficiency video coding HEVC standard. [0003] Scalable and high-efficiency video coding SHVC can encode the input video signal into code streams with different bit rates, spatial resolutions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/103H04N19/147H04N19/30
Inventor 吴炜唐晓丽刘炯冯磊
Owner XIDIAN UNIV
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