H.264-to-H.265 video transcoding method and transcoder

Abstract

The invention provides an H.264-to-H.265 video transcoding method which comprises an H.264 decoding process and an H.265 encoding process. According to the H.264 decoding process, code streams conforming to the H.264 standard are completely decoded into a pixel domain, and the encoding macro block type, the encoding block mode and the residual sum of each macro block of all frames I and the encoding macro block type, the motion vector, the reference frame and the residual sum of each macro block of all frames P are extracted in the decoding process. According to the H.265 encoding process, H.265 encoding is carried out according to the H.264 decoding result to obtain H.265 video, corresponding processing according to CTU setting and frame types is included, search branches are properly reduced, and encoding complexity is reduced. Therefore, video transcoding time can be effectively reduced under the condition of guaranteeing that video quality is slightly reduced and the code rate is slightly increased, and popularization of the H.265 standard and network bandwidth saving are facilitated.

Description

technical field [0001] The invention belongs to the two fields of image compression technology and computer technology, and specifically relates to a technical solution for fast transcoding from H.264 to H.265. Background technique [0002] At present, my Internet business has entered a period of rapid development, and the status of multimedia technology in people's work, study, and entertainment is becoming more and more important. As the most important and expressive video coding technology in multimedia technology, it is also developing rapidly with the times. From H.261 proposed in 1990 to the previous generation of video coding standard H.264, video coding technology has been continuously updated and improved for decades. Now ITU-T VCEG has released a new generation of video coding standard H.265 (also known as HEVC). Compared with the previous coding standard, H.265 adopts more advanced coding technology and improves coding efficiency. [0003] Currently, one of the ...

AI Technical Summary

Problems solved by technology

However, this method has a very important disadvantage, that is, it requires quite a lot of computing resources, and the time consumption is too large, especially for H. difficulty

Often, independent decoding and encoding of the video signal may also result in a loss of video quality, since decisions made during re-encoding do not take into account the parameters of the original encoding

[0008] Therefore, the current H.264 to H.265 transcoder is not efficient in transcoding, consumes a lot of resources, and the equipment is expensive, which often cannot meet the actual engineering needs

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