Inter-predictive coding unit selection method for high-performance video coding HEVC
A technology of video coding and coding unit, which is applied in the field of video coding, can solve the problems of low coding rate and high computational complexity, and achieve the effects of fast inter-frame coding, low computational complexity, and high detection accuracy
Active Publication Date: 2016-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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The above-mentioned simple judgment depth cannot judge the CU scale to the greatest extent, and the calculation complexity is high, and the encoding rate is low
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[0020] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0021] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0022] combine figure 1 , using the present invention for interframe encoding of HEVC, comprising the following steps:
[0023] Step S1: Before encoding each video frame, perform 1 / 4 down-sampling on the horizontal and vertical directions respectively, estimate the optical flow field of the down-sampled image, obtain the optical flow field of the current frame, and proceed to step S2.
[0024] Step S2: Based on the motion vector in the optic...
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The invention discloses a method for selecting an inter-frame predictive coding unit for HEVC, which belongs to the video coding technology. The technical solution of the present invention is: constructing the pyramidal motion divergence PMD of the current inter-frame predictive coding unit CU: based on motion vector estimation, the motion divergence of the four sub-blocks obtained by obtaining the current CU and dividing the current CU equally is denoted as PMD ; Select the reference CU of the current CU: in the coded CU neighbors of the current CU, based on the corresponding PMD, obtain the most similar l reference CU according to the Euclidean distance, the scale of the reference CU is the same as the scale of the current CU; based on l The split identifier of the reference CU determines the value of the split identifier of the current CU: if the split identifiers of the reference CUs are the same, the split identifier of the current CU is equal to the split identifier of the reference CU; otherwise, based on the rate The distortion cost determines the split identifier of the current CU. The invention is simple and efficient, and effectively reduces the time complexity of HEVC inter-frame prediction under the premise of ensuring the encoding quality.
Description
technical field [0001] The invention belongs to video coding technology, and in particular relates to a method for selecting an inter-frame predictive coding unit (CodingUnit, CU) based on pyramid motion divergence in High Efficiency Video Coding (HEVC). Background technique [0002] With the development and maturity of high-definition video technology, a large number of high-definition video applications have emerged in people's daily life, and various applications related to high-definition video have been welcomed and favored by users. However, the larger amount of data brought by the higher resolution makes high-definition video more demanding on the compression performance of the video codec algorithm. The current video codec standards (such as H.264 / AVC, etc.) often cannot well meet the compression performance requirements of high-definition video. In order to meet the requirements of new video applications for codec standards, the Joint Collaborative Team Video Codin...
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IPC IPC(8): H04N19/109H04N19/503H04N19/70
Inventor 李宏亮熊健
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA