Video and audio synchronizing method of P2PVoD (peer-to-peer video on demand) system based on SVC (scalable video coding)

A video, audio and audio technology, which is applied in the field of video and audio synchronization of SVC-based P2PVoD systems, can solve the problem of high complexity, and achieve the effects of scheduling synchronization, playback synchronization, and transmission synchronization.

Inactive Publication Date: 2012-10-31
CHONGQING UNIV
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Problems solved by technology

However, this method also has the disadvantage that it is only suitable for single-layer vid

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  • Video and audio synchronizing method of P2PVoD (peer-to-peer video on demand) system based on SVC (scalable video coding)
  • Video and audio synchronizing method of P2PVoD (peer-to-peer video on demand) system based on SVC (scalable video coding)
  • Video and audio synchronizing method of P2PVoD (peer-to-peer video on demand) system based on SVC (scalable video coding)

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Embodiment Construction

[0036] 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.

[0037] The present invention mainly realizes the transmission synchronization and playback synchronization of SVC (Scalable Video Coding, scalable video coding) video and audio in the P2PVoD system.

[0038] The video and audio synchronization method of this SVC-based P2PVoD system consists of the following steps:

[0039] S1. In order to realize the synchronous transmission of SVC video stream and audio stream, such as figure 2 As shown, at the server side, the SVC video stream is divided into N video chunks Video Chunk according to e...

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Abstract

The invention provides a video and audio synchronizing method based on an SVC (scalable video coding) P2PVoD (peer-to-peer video on demand) system, belonging to the field of multimedia internet application. The video and audio synchronizing method comprises the following steps of: compositing an audio stream into an SVC video stream, combining an SVC video coding feature with a Bittorrent protocol, and improving a package formate of a Torrent file, thus ensuring SVC-based video and audio data transmission synchronization; utilizing a manner combining cache-based quality self adapting with sequential downloading to ensure the video and audio play smoothness and improve the video and audio play quality, and realizing scheduling synchronization of an SVC video and audio segment; and taking an SVC video as a main media stream and an audio as a secondary media stream, updating and synchronizing a clock according to playing time information of the video segment during playing, and synchronously decoding and playing corresponding audio segments by the clock, thus realizing play synchronization of video and audio medias.

Description

technical field [0001] The invention relates to a method for synchronizing video and audio, in particular to a method for synchronizing video and audio in an SVC-based P2PVoD system. Background technique [0002] With the widespread use of broadband communications, multimedia applications on the Internet have become more and more popular. Applying SVC (Scalable Video Coding, Scalable Video Coding) to P2P (Peer-to-Peer, peer-to-peer Internet technology) streaming media system is the most promising solution to the problem of significant changes in bandwidth capacity of P2P systems and heterogeneous and diverse user terminals . SVC allows "a video sequence to be encoded and decoded at one time", and can provide composite spatio-temporal resolution and high-fidelity video streams, so it can effectively meet the requirements of P2P systems for bit rate adjustment according to available bandwidth, and can well adapt to The spatio-temporal resolution of different user terminals p...

Claims

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Application Information

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IPC IPC(8): H04N21/233H04N21/234H04N21/236H04N21/439H04N21/4408
Inventor 唐朝伟袁杨罗秀红
Owner CHONGQING UNIV
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