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Interframe mode fast selecting method and system of video compressed coding

A fast selection, inter-frame mode technology, applied in the field of video coding, can solve problems such as huge computational complexity

Active Publication Date: 2017-02-22
SUN YAT SEN UNIV
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Problems solved by technology

In order to obtain the best CU division, it is necessary to calculate the rate-distortion cost under each combination of CU / PU, and finally use the PU mode with the smallest rate-distortion cost as the optimal PU mode for encoding. Therefore, the frame in HEVC encoding The computational complexity required for inter-mode selection is enormous

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  • Interframe mode fast selecting method and system of video compressed coding
  • Interframe mode fast selecting method and system of video compressed coding
  • Interframe mode fast selecting method and system of video compressed coding

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Embodiment 1

[0089] refer to Figure 2-8 , the first implementation example of the present invention:

[0090] Aiming at the problems of high computational complexity and slow speed of inter-frame mode selection in the prior art, the present invention proposes a brand-new fast selection method and system for inter-frame mode in video compression coding.

[0091] There is a temporal-spatial correlation in the video, and there is also a correlation between the size of the CU and the division of the PU, so it is not necessary to exhaust all possible CU sizes and PU divisions. In order to reduce the calculation amount of HEVC encoding inter-frame mode selection, the present invention improves the CU layer and PU layer respectively, and proposes a sub-CU pruning algorithm for the CU layer and a PU partition mode preselection method for the PU layer.

[0092] For the sake of illustration, let CU m Indicates the current CU at a depth of m, CUm, n indicates the CU m 4 sub-CUs, n=1,2,3,4, such a...

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Abstract

The invention discloses an interframe mode fast selecting method and system of video compressed coding. The interframe mode fast selecting method and system of video compressed coding comprises the steps of judging whether one current-depth CU of a current coding image needs to terminate a further division operation by adopting a sub-CU pruning algorithm in one CU layer based on spatial correlation of the rate-distortion cost of a current coding image and time correlation of depth information, if so, terminating the further division operation for the current-depth CU, otherwise, carrying on further division for the current-depth CU; and sieving a range of PU division in advance in a PU layer based on texture information of the current coding image, and then performing PU mode division based on the range of PU division sieved in advance. The interframe mode fast selecting method and system of video compressed coding has the advantages of low calculation complexity and fast speed, and can be widely applied to the field of video coding.

Description

technical field [0001] The invention relates to the field of video coding, in particular to a method and system for fast selection of an inter-frame mode of video compression coding. Background technique [0002] In order to meet the increasingly urgent development needs of the digital video industry for high-definition and ultra-high-definition video storage and transmission, the International Organization ITU-T's Video Coding Experts Group (Video Coding Experts Group, VCEG) and ISO / IEC's Moving Picture Experts Group (MovingPicture Experts Group (MPEG) established the Joint Collaborative Team on Video Coding (JCT-VC), and in 2013 formulated a new generation of high-efficiency video coding standard HEVC (High Efficiency Video Coding). HEVC still uses the block-based hybrid coding framework, but compared with H.264, it has carried out a lot of technical innovations in many details, such as the introduction of the coding tree unit (CTU) of the quadtree structure and up to 10 k...

Claims

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Application Information

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IPC IPC(8): H04N19/109H04N19/503H04N19/52H04N19/176H04N19/154
CPCH04N19/109H04N19/154H04N19/176H04N19/503H04N19/52
Inventor 梁凡许舟凌
Owner SUN YAT SEN UNIV
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