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A scalable transcoding method and system from h.264/avc to svc space

A transcoding and space technology, applied in the field of video encoding and transmission, can solve the problems of high storage space requirements and high transcoding complexity, and achieve the effect of high conversion efficiency

Inactive Publication Date: 2016-09-14
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the existing high complexity of transcoding from H.264 / AVC to SVC and the relatively high requirement for storage space, thereby providing a fast and effective transcoding method

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  • A scalable transcoding method and system from h.264/avc to svc space
  • A scalable transcoding method and system from h.264/avc to svc space

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Embodiment Construction

[0052] The present invention will be further described now in conjunction with accompanying drawing.

[0053] For ease of understanding, the present invention will be described below in conjunction with an example.

[0054] Example background description: There are four participants A, B, C, and D in a video conference, and the resolutions of the terminals held by the four participants are R A (704×576), R B (704×576), R C (352×288) and R D (176×144), the video provided by the video output terminal A is a compressed video stream S conforming to the H.264 / AVC standard AVC-A . In order to adapt to the diversity of resolutions of terminal devices at the video receiving end, the video stream S AVC-A Need to be converted into SVC video stream S SVC . The resulting video stream S after conversion SVC should contain three spatial resolution layers, the highest layer (EL) video stream S SVC-EL Resolution is R B , the middle layer (ML) video stream S SVC-ML Resolution is R ...

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Abstract

The invention relates to a space-scalable transcoding method from H.264 / AVC to SVC, comprising: decoding the source video stream encoded by H.264 / AVC, obtaining the decoded source video frame and The encoding mode information corresponding to the video frame; the source video frame is down-sampled to obtain a variety of intermediate video frames with different resolutions; according to the encoding mode information, corresponding options are generated for various intermediate video frames with different resolutions Encoding mode information; according to optional encoding mode information and inter-layer prediction mode information, optimal encoding mode information is selected for multiple intermediate video frames with different resolutions, and SVC encoding is realized by using the optimal encoding mode information to obtain multiple SVC video streams in different resolution layers. The invention can quickly and effectively realize transcoding from H.264 / AVC to SVC, has high conversion efficiency, and does not need to occupy too much storage space.

Description

technical field [0001] The invention relates to the field of video coding and transmission, in particular to a space-scalable transcoding method and system from H.264 / AVC to SVC. Background technique [0002] The H.264 / AVC video coding standard has high compression efficiency and good network interactivity, so it is now more and more applied to various video applications, such as video on demand, video conferencing, video surveillance and digital television, etc. [0003] There are two aspects of video applications on the Internet that require special attention. One is that different end users have different network bandwidth resources. If the video source only provides and transmits one compressed video stream, the video stream may not match the network conditions of some users. For example, the video data received by users with poor network conditions is seriously lost, which affects the subjective quality; for users with good network conditions, bandwidth resources may ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/40H04N19/33
Inventor 要瑞宵刘延伟赵平华慈松唐晖
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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