A Fast Screen Content Coding Method Based on Spatiotemporal Correlation

A technology of screen content coding and space-time correlation, applied in image communication, digital video signal modification, electrical components, etc., can solve the complex and high-level problems of SCC video coding, and achieve the effect of saving coding time, reducing complexity and improving efficiency.

Active Publication Date: 2019-11-22
浙江知多多网络科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to address the shortcomings of the existing SCC video coding complexity, and propose a fast screen content coding method based on spatio-temporal correlation, which can reduce the complexity of coding while ensuring the coding quality, and is especially suitable for the needs of screen video Real-time compression occasions, such as various portable mobile terminal equipment

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  • A Fast Screen Content Coding Method Based on Spatiotemporal Correlation
  • A Fast Screen Content Coding Method Based on Spatiotemporal Correlation
  • A Fast Screen Content Coding Method Based on Spatiotemporal Correlation

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[0045] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0046] Such as Figure 1-6 As shown, a fast screen content coding method based on spatio-temporal correlation adopts the SCM2 model of SCC video coding, and the test conditions refer to the general test conditions of JCT-VC (JCTVC-R1015). Intra coding configuration file encoder_intra_main_scc.cfg.

[0047] A fast screen content coding method based on spatio-temporal correlation, its flow chart is as follows Figure 4 As shown, the specific steps of the CU division module based on spatio-temporal correlation are:

[0048] Step (1), calculate the absolute error and AFD of the current CU and the same position CU of the previous frame to describe the image similarity between the two, the calculation formula of AFD is as follows:

[0049]

[0050] Among them, P cur (i, j) represents the pixel Y component value at the current CU position (i...

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Abstract

The invention discloses a fast screen content coding method based on time-space correlation. The CU division module based on spatiotemporal correlation of the present invention is to first calculate the absolute frame difference between the CU in the current frame and the CU in the same position in the previous frame, and divide the CU into two types; The correlation on the intra prediction mode determines that the current CU ends the partition early or determines that the current CU only performs PLT mode prediction; the mode selection module based on the spatio-temporal correlation uses the mode correlation between the current CU and its spatio-temporal adjacent CUs to skip specific prediction mode; the CU division module based on coded bits first obtains the threshold of CU coded bits at each depth through the graph of CU hit rate and coded bits, and if the coded bits of the current CU is less than the threshold, the CU division will be terminated in advance . The invention reduces the complexity of CU planning, simplifies the selection process of the intra-frame prediction mode, and improves the SCC coding efficiency.

Description

technical field [0001] The invention belongs to the technical field of screen content coding (SCC), in particular to a low-complexity fast SCC intra-frame video coding method. Background technique [0002] In recent years, with the application of high-definition and ultra-high-definition video (resolution up to 4K×2K, 8K×4K) into people’s field of vision, video compression technology has been greatly challenged. In addition, various video applications are emerging with the development of network and storage technologies. The diversification of video applications and the trend of high-definition put forward higher requirements for video compression performance. To this end, in April 2010, ITU-T's Video Coding Experts Group (VCEG) and ISO / IEC's Moving Picture Experts Group (MPEG) established the Video Coding Joint Development Team (JCT-VC) to jointly formulate a new generation of video coding standards. , completed the High Efficiency Video Coding HEVC (High Efficiency Video...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/107H04N19/137H04N19/146H04N19/159H04N19/184
Inventor 陆宇林雅梦沈礼权刘华平唐向宏
Owner 浙江知多多网络科技有限公司
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