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A fast coding method for hevc

A fast coding and coding technology, applied in the field of video coding, can solve the problems of poor performance of coding rate distortion and lack of careful consideration of the correlation between motion vectors, etc.

Active Publication Date: 2017-09-05
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 invention discloses a HEVC fast encoding method, which makes full use of the time-domain similarity of the largest coding unit in the encoding process and the largest coding unit with the same coordinate position in the forward reference frame of the frame where it is located, and the adjacent left side of the largest coding unit The spatial similarity of the largest coding unit and the spatial similarity of the adjacent largest coding unit above it are used to calculate the depth prediction value of the largest coding unit in the P frame or B frame, and then use the depth prediction value and depth of the largest coding unit to traverse the interval The one-to-one correspondence relationship determines the depth traversal interval of the largest coding unit, encodes the largest coding unit and each coding unit in the depth traversal interval, and encodes the largest coding unit that meets the conditions in the P frame or B frame during the encoding process And each coding unit that meets the conditions performs fast prediction mode selection, which reduces unnecessary depth and prediction mode traversal, thereby reducing the computational complexity of video coding on the premise of ensuring video quality.

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...

Claims

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Application Information

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Patent Type & Authority Patents(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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