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Self-adaption rapid video coding method based on variance

A video coding and adaptive technology, applied in the field of video coding, can solve the problem of time consumption and so on

Inactive Publication Date: 2015-12-02
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the quadtree encoding process, it will consume a lot of time to select the best encoding mode combination according to RDO (RateDistortionOptimization, rate-distortion optimization block). big challenge

Method used

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  • Self-adaption rapid video coding method based on variance
  • Self-adaption rapid video coding method based on variance
  • Self-adaption rapid video coding method based on variance

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no. 1 example

[0126] In the CTU quadtree encoding process, the HEVC encoder will select the encoding mode with the least rate-distortion cost according to the RDO criterion, so that redundant data in the video sequence can be better removed, which means that the division mode of the CU is the same as The division mode of a PU depends on its corresponding coding effect. The redundant data in the video sequence is mainly temporal redundancy and spatial redundancy, and the HEVC encoder uses a specific PU division mode for the CU to apply intra prediction or inter prediction to the PU, thereby removing temporal redundancy. Residual and spatial redundancy, that is to say, the coding effect of CU and PU depends on the performance of predictive coding to a large extent.

[0127] According to the principle of predictive coding, it can be known that its coding performance has a great correlation with the local features of the image. Therefore, for a CU of a certain depth, the coding effect of applyi...

Embodiment 2

[0163] In order to verify the performance of the algorithm proposed by the present invention, the present invention implements the proposed algorithm based on HM16.0, and conducts a large number of experiments. All subsequent experiments of the present invention are carried out under the same experimental environment, and the experimental environment of the present invention is as follows:

[0164] Processor: Intel(R) Core(TM) i7-2600CPU3.40GHz3.41GHz;

[0165] Operating system: 64-bit Windows7;

[0166] Coding configuration: test conditions specified by CTC (CommonTestCondition)

[0167] In this embodiment, the performance of the algorithm is comprehensively evaluated by comparing the test results of the algorithm proposed by the present invention with the corresponding test results of HM16.0, and the experimental data are shown in Table 1, Table 2 and Table 3 below (wherein, Table 1. The video types and video sequences in Table 2 and Table 3 are all from the test condition...

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Abstract

The invention discloses a self-adaption rapid video coding method based on a variance. The method comprises the following steps of calculating a variance of a current frame CU; according to the variance of the current frame CU, using a PU dividing-mode rapid decision algorithm based on the variance to carry out PU dividing mode detection so as to obtain a PU dividing mode with minimum rate distortion cost and optimum rate distortion cost of CU non-division; according to the variance of the current frame CU, using a CU dividing-mode rapid decision algorithm based on the variance to carry out CU dividing decision and determining a CU dividing mode with the minimum rate distortion cost; coding according to the PU dividing mode with the minimum rate distortion cost and the CU dividing mode. In the invention, the PU dividing-mode rapid decision algorithm based on the variance and the CU dividing-mode rapid decision algorithm based on the variance are combined to carry out CU and PU dividing mode selection; a coding complexity is greatly reduced, a coding speed is increased and the method can be widely used in a video coding field.

Description

technical field [0001] The invention relates to the field of video coding, in particular to a variance-based adaptive fast video coding method. Background technique [0002] HEVC (High Efficiency Video Coding, High Performance Video Coding) is a new generation developed by JCT-VC (Joint Collaborative Team Video Coding), a video coding joint group established by ITU-T's VCEG (Video Coding Experts Group) and ISO / IEC's MPEG (Moving Picture Experts Group) in January 2010. Video coding standard. In January 2013, HEVC officially became the latest international standard for video coding. [0003] Generally speaking, compared with the H.264 / AVC video coding standard, the HEVC standard has better coding performance, and can save about 50% of the bit rate on average while maintaining the same subjective video quality; however, HEVC’s The encoding and decoding complexity is also much higher than that of H.264 / AVC. Therefore, applying the HEVC standard to various multimedia applicati...

Claims

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Application Information

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IPC IPC(8): H04N19/61H04N19/567H04N19/86H04N19/96
Inventor 梁凡谢立威
Owner SUN YAT SEN UNIV
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