Transcoding method from H.264/SVC(scalable video coding) to H.264/AVC(advanced video coding) based on video on demand system of P2PVoD

A video-on-demand and transcoding technology, which is applied in the field of transcoding from H.264/SVC to H.264/AVC, can solve problems such as large limitations, achieve control error drift, reduce time complexity, and simplify calculation complexity Effect

Inactive Publication Date: 2012-11-21
CHONGQING UNIV
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Problems solved by technology

Although the transcoding operation of this method is simple, it requires strict control at the encoding end,

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  • Transcoding method from H.264/SVC(scalable video coding) to H.264/AVC(advanced video coding) based on video on demand system of P2PVoD
  • Transcoding method from H.264/SVC(scalable video coding) to H.264/AVC(advanced video coding) based on video on demand system of P2PVoD
  • Transcoding method from H.264/SVC(scalable video coding) to H.264/AVC(advanced video coding) based on video on demand system of P2PVoD

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[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0040] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two The internal communication of each element may be directly connected or indirectly connected through an intermediary. Those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0041] The transcod...

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Abstract

The invention provides a transcoding method from H.264/SVC(scalable video coding) to H.264/AVC(advanced video coding) based on a video on demand system of P2PVoD, belonging to the field of video transcoding. With the adoption of SVC self-adapting transcoding, an SVC document is divided into independent multi-layer documents according to layers by a separator, before transcoding, a space layer and a quality layer are subjected to a self-adaption process according to the terminal ability, layers not needed are abandoned to enable the transcoding process to effectively reduce unnecessary time consumption, and the video quality matching with the ability of a client end is provided for the client end; with the adoption of a method combining a pixel region and an alternation region, time complexity is lowered, and error shift is effectively controlled; with the adoption of an encoding control optimized algorithm based on Lagrangian, when an average distortion function is being solved, a sum of absolute difference (SAD) is used for substituting a sum of squared difference (SSD), and the calculation complexity is simplified; and with the adoption of a processing mechanism by parallel threads based on GOP (group of pictures), the single-encoded GOP is processed by parallel threads, and thus the transcoding time is greatly reduced.

Description

technical field [0001] The invention relates to Internet streaming media technology, in particular to a transcoding method from H.264 / SVC to H.264 / AVC based on a P2PVoD video-on-demand system. Background technique [0002] With the rapid development of computer network technology and multimedia technology, people's demand for video services is becoming more and more diverse. The research of video technology has become one of the hot research fields of information technology. In March 2003, the ITU / ISO joint project team JVT released the video coding standard H.264 / AVC (Advanced Video Coding). Due to its superior compression, high coding efficiency and good network adaptability, it has won the widely used. [0003] In order to solve the requirement of accessing multimedia information with the same content from more and more heterogeneous networks, multimedia terminals, and user needs in the expansion of multimedia applications, H.264 / SVC (Scalable Video Coding) is proposed o...

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Application Information

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IPC IPC(8): H04N21/234H04N21/2343H04N21/437
Inventor 唐朝伟罗秀红袁杨
Owner CHONGQING UNIV
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