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

A video transcoding and encoding technology, which is applied in the field of image compression technology and computer, can solve the problems of real-time transcoding difficulties, video quality degradation, expensive equipment, etc., to reduce video transcoding time, reduce transcoding complexity, and improve transcoding The effect of code speed

Inactive Publication Date: 2014-09-10
HUAZHONG NORMAL UNIV
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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 deci

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

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[0030] The technical solution of the present invention specifically includes two parts, namely the decoding part of H.264 and the encoding part of H.265. First, the H.264 encoded video is completely decoded into the pixel domain. During this decoding process, all the video information is extracted. The coded macroblock type, coded block mode, residual, and all P-frame coded macroblock types, motion vectors, reference frames, and residuals of each macroblock in the I frame are saved and saved; then the decoded part of the pixel domain The video is re-encoded with the H.265 encoding standard. In the H.264 encoding part, when the encoding mode is selected for the image macroblock, the appropriate encoding mode is selected according to the saved information as the best encoding mode for H.265 CTU. The specific method can adopt software technology to realize the automatic operation process. The technical solution of the present invention will be described in detail below with refere...

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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 ...

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Application Information

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IPC IPC(8): H04N19/40H04N19/103H04N19/51H04N19/513H04N19/154H04N19/176
Inventor 张新晨羿舒文黎伟江昊华哲
Owner HUAZHONG NORMAL UNIV
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