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H.265 rapid transcoding method based on code stream bit number and block division mapping

A technology of number of bits and block division, applied in the field of video image coding, can solve the problems of inadvisability, time-consuming, and various formats of source input streams, so as to reduce the amount of computation, shorten the transcoding time, and ensure the subjective and objective visual quality. Effect

Inactive Publication Date: 2017-02-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Claims
  • Application Information

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Problems solved by technology

However, the implementation process of full decoding and full editing is extremely time-consuming, especially in the process of transcoding, due to unknown block division, it is necessary to traverse various situations or select a large number of block situations, which is often not advisable in actual production applications
Therefore, the video fast transcoding method has a very strong practical urgency
[0010] In addition, when capturing and compressing video in different periods and different devices, different video encoding formats are used, resulting in a variety of stream formats input by the source.

Method used

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  • H.265 rapid transcoding method based on code stream bit number and block division mapping
  • H.265 rapid transcoding method based on code stream bit number and block division mapping
  • H.265 rapid transcoding method based on code stream bit number and block division mapping

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Embodiment

[0060] figure 1 As shown, fast transcoding includes:

[0061] 101: Input information code stream.

[0062] 102: Select the MPGE-x series decoder according to the information of the input code stream to decode the input code stream, generate a corresponding YUV file and input it into the YUV buffer. At the same time, it counts the Bit, QP, CTU, encoding standard EncodeType and other information of each encoding unit;

[0063] 103: Select an H.264 decoder according to the information of the input code stream to decode the input code stream, generate a corresponding YUV file and input it into the YUV buffer. At the same time, count the Bit, QP, CTU, encoding type EncodeType, etc. of each encoding unit;

[0064] 104: Select an H.265 decoder according to the information of the input code stream to decode the input code stream, generate a corresponding YUV file and input it into the YUV buffer. At the same time, count the Bit, QP, CTU, encoding standard EncodeType, etc. of each ...

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Abstract

The invention provides an H.265 rapid transcoding method based on code stream bit number and block division mapping. The information in the input code stream is fully utilized to guide the H.265 coding, the operand of block division and mode selection is reduced to greatly shorten the transcoding time, and meanwhile, the subjective and objective visual quality of the transcoded video can be guaranteed. The code stream format is not limited to H.265 isomorphic transcoding, and the technology supports H.264 / AVC or H.263++, even earlier heterogeneous transcoding of MPGE standards.

Description

technical field [0001] The invention relates to video image coding technology, in particular to H.265 fast video transcoding technology. Background technique [0002] For the transcoding application of the new generation of video codec standard H.265, first decode the code stream into YUV, Y4M and other formats as the source input, and then use the H.265 encoder to encode, which is called full decoding and full encoding . [0003] There are two types of H.265 video transcoding: one is homogeneous video stream transcoding, and the other is heterogeneous video stream transcoding. Homogeneous video transcoding refers to the conversion between code streams compressed according to the same video coding standard, while heterogeneous transcoding refers to the conversion between code streams compressed according to different video coding standards. [0004] In H.265, block encoding is adopted. Different from previous generations of encoders, the H.265 encoding standard uses a mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/122H04N19/176H04N19/184H04N19/40H04N19/70
CPCH04N19/122H04N19/176H04N19/184H04N19/40H04N19/70
Inventor 周益民郭江彭凤婷唐钦宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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