Quick frame inner transcoding method from H.264/AVC standard to HEVC standard and transcoder thereof

Abstract

The invention discloses a quick frame inner transcoding method from the H.264 / AVC standard to the HEVC standard and a transcoder thereof. The method mainly comprises the steps that code flow of the H.264 / AVC standard is placed into the transcoder of the H.264 / AVC standard for transcoding, according to information obtained by transcoding, a macro block structure of the H.264 / AVC standard is converted to a coding unit format and a prediction unit format of the HEVC standard, ordering is carried out again according to the blocking mode of the HEVC standard based on the zorder sequence; frame inner prediction modes of size blocks extracted in the H.264 / AVC standard correspond to frame inner prediction modes of the HEVC standard; for the previous level size blocks of the size blocks of 16*16, 8*8 and 4*4 in the H.264 / AVC standard, an H.264 / AVC standard computing method is directly used for determining the frame inner prediction modes; by comparing the RD-cost value of the optimal frame inner prediction modes of the current level size blocks with the RD-cost value the optimal frame inner prediction modes of the previous level size blocks, the final frame inner prediction modes are selected. Under the situation of low bit rate and video quality loss, coding computing complexity is greatly lowered.

Description

technical field [0001] The present invention relates to the transcoding technology between video coding standards in the field of digital image communication, and more specifically relates to an intra-frame transcoding technology from the H.264 / AVC standard to the HEVC standard. Background technique [0002] The current mainstream video coding standard is H.264 / AVC. With the development of technologies such as networks and transmission channels, high-definition video has gradually become the main business of network storage and transmission. The size block mechanism in the H.264 / AVC standard cannot To obtain very good coding performance, for this reason, the two major international standardization organizations ITU-T and ISO / IEC have specially established the video coding joint collaboration group JCT-VC, and jointly developed a new generation of international video coding standards: high-performance video coding ( HEVC). The formulation of this standard began in October 20...

AI Technical Summary

Problems solved by technology

[0002] The current mainstream video coding standard is H.264 / AVC. With the development of technologies such as networks and transmission channels, high-definition video has gradually become the main business of network storage and transmission. The size block mechanism in the H.264 / AVC standard cannot To obtain very good coding performance, for this reason, the two major international standardization organizations ITU-T and ISO / IEC have specially established the video coding joint collaboration group JCT-VC, and jointly developed a new generation of international video coding standards: high-performance video coding ( HEVC)

The formulation of this standard began in October 2010 and has been completed so far. The compression ratio has doubled compared with the H.264 / AVC standard, while keeping the video quality basically unchanged. If the HEVC standard is applied to actual video in the network The storage and transmission will bring great performance improvement

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