A video coding method and system based on early skipping of coding unit levels

Abstract

The invention discloses a video coding method based on skipping of a coding unit layer in advance. The method comprises the following steps: reading a video sequence, wherein the video sequence comprises an N-frame image, and a coding frame number counter i is arranged to meet the equation of i=1; and coding an ith frame, judging whether the i (N,) exists, if yes, the equation of i=i+1 is arranged, and the next frame is coded, and otherwise, the process is over. According to the video coding method based on skipping of the coding unit layer in advance, the unnecessary calculation of coding depth is skipped in advance in the quadtree depth ergodic process, and thus coding time is saved. In addition, the coded massage of the same position of a previous frame is adopted to judge whether coding of a coding unit at current depth is skipped or not, the pre-calculation of a skipping mode of the coding unit at the depth which needs to be skipped is reserved, and therefore the coding depth and the pre-calculation mode which are very unlikely to be selected can be skipped only.

Description

technical field [0001] The present invention belongs to the field of video coding and decoding, and more specifically relates to a video coding method and system based on early skipping of coding unit levels. Background technique [0002] Nowadays, people's demand for high-quality and high-definition video content is increasing day by day, and the standard of video coding is also developing towards the direction of high compression ratio and supporting high-definition video. The ITU-T Video and Image Expert Group and the ISO / IEC Mobile Image Expert Group jointly established the Joint Collaborative Team Video Coding (JCT-VC) to study the next-generation video coding standard, namely High Efficient Video Coding (HEVC). It is mainly aimed at video compression with resolutions from 320x240 to 7680x4320. Compared with H.264 / AVC High Profile, the encoding performance is doubled. [0003] However, there are some disadvantages in the existing HEVC coding method: its newly introduce...

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Problems solved by technology

[0003] However, there are some disadvantages in the existing HEVC coding method: its newly introduced quadtree partition coding technology, although it has made a great contribution to the improvement of coding efficiency, but the computational complexity is quite high

The quadtree split starts from the largest coding unit (size 64x64), and is divided into four smaller coding units in turn until it is divided into the smallest coding unit (size 8x8). Each coding unit of each depth is To calculate, the complexity is quite high

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