HEVC fast coding method

A fast coding and coding technology, applied in the field of video coding, which can solve the problems of not carefully considering the correlation between motion vectors, poor coding rate distortion performance, etc.

Active Publication Date: 2015-08-19
深圳威尔视觉科技有限公司
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Problems solved by technology

Xiong et al. used the optical flow method to calculate the eigenvalues ​​of Pyramid Motion Divergence (PMD) to determine the segmentation of the CU, which reduced the complexity to a certain extent, but did not carefully consider the correlation between motion vectors, resulting in Rate-distortion performance is not good

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0048] A fast encoding method for HEVC proposed by the present invention, its overall realization block diagram is as follows figure 2 As shown, it includes the following steps:

[0049]① Define the current frame to be processed in the high-definition video as the current frame.

[0050] There are I frame, P frame and B frame in high-definition video coding. Among them, I frame belongs to the key frame of video coding and belongs to the I frame image group. It does not use time domain information and adopts intra frame coding; P frame adopts the way of forward reference Intra-frame and inter-frame encoding is performed, which belongs to the non-I-frame image group; B-frame uses forward and backward bidirectional reference methods for intra-frame and inter-frame encoding, and also belongs to the non-I-frame image group.

[0051] ② Define the...

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Abstract

The present invention discloses an HEVC fast coding method. During the coding process, the temporal similarity between optimal coding units of the same coordinate position in forward and backward reference frames, the spatial similarity between adjacent optimal coding units in the left and right direction, and the spatial similarity between adjacent optimal coding units in the up and down direction, are fully utilized to figure out the depth predicted values of P-frame or B-frame optimal coding units. After that, based on the one-to-one correspondence relationship between the depth predicted values of the optimal coding units and depth ergodic intervals, the depth ergodic intervals of the optimal coding units are determined. The optimal coding units and all coding units in the optimal coding units are coded within the depth ergodic intervals. During the coding process, qualified P-frame or B-frame optimal coding units and qualified coding units are selected quickly in the prediction mode, so that the unnecessary depth traversal and the unnecessary prediction-mode traversal are avoided. Therefore, on the premise that the video quality is ensured, the calculation complexity of the video coding is lowered.

Description

technical field [0001] The present invention relates to a video coding technology, in particular to a HEVC fast coding method. Background technique [0002] With the rapid development of multimedia and network technology, video coding standards such as MPEG-2, MPEG-4, and H.264 / AVC have been difficult to meet users' requirements for efficient compression and transmission of ultra-high-definition video. VCEG of the International Standard Organization ITU-T and MPEG of ISO / IEC jointly established JCT-VC (Joint Collaborative Team on Video Coding) to research and formulate the High Efficiency Video Coding (HEVC) standard. Compared with H.264 / AVC, HEVC has basically achieved the goal of doubling the coding efficiency; however, because HEVC uses technologies such as larger coding blocks and quadtree coding structures in the coding structure, it leads to complex coding. significantly increased. [0003] The quadtree structure division of a Largest Coding Unit (LCU) in the HEVC Te...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/109H04N19/147H04N19/503
Inventor 蒋刚毅方树清彭宗举郁梅徐升阳杜宝祯
Owner 深圳威尔视觉科技有限公司
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