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Method and system for pushing video streaming based on layered coding

A technology of layered coding and video streaming, applied in transmission systems, television, and pulse-modulated television signal transmission, etc., can solve problems such as delays, and achieve the effects of reducing delays, solving repetitive coding, and reducing buffering time.

Active Publication Date: 2010-12-08
CHINA TELECOM CORP LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] For the existing encoding and decoding methods and channel preview methods of IPTV services and mobile phone services, it is necessary to encode according to the fixed maximum required code stream on the server side, and after the user terminal decodes these code streams according to the fixed mode, Regardless of whether the user browses a small video window or watches it in full screen mode, the video stream is pushed in the same way, with a large delay

Method used

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  • Method and system for pushing video streaming based on layered coding
  • Method and system for pushing video streaming based on layered coding
  • Method and system for pushing video streaming based on layered coding

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Embodiment Construction

[0019] The invention relates to a method and system for pushing video streams based on layered coding. On the layered coding server side, the code stream is layered coded to provide the base layer code stream and the enhancement layer code stream, and the base layer code stream is cached on the network access server. When the user terminal initiates a channel switching request, the network access The access server pushes the base layer code stream to the user terminal at the fastest speed, so that the user terminal can preview the channel with a small delay. In addition, the network access server also pushes the normal code stream to the user at a normal speed , present to the user according to the normal clear code stream at the user terminal, so as to realize fast switching.

[0020] The technical solution of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The present invention is based on the vide...

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Abstract

The invention provides a method and a system for pushing video streaming based on layered coding. The method comprises the following steps: the layered coding is conducted on a normal code stream of a required channel by a layered coding server, the normal code stream comprises a base layer code stream and an enhancement layer code stream and is pushed to a network access server; the base layer code stream is decoded by the network access server and stored in a cache; a channel switch request is initiated, and transmitted to the network access server by a terminal; the channel switch request is received by the network access server, and the base layer code stream starting from the last video finishing frame is obtained in the cache; and the base layer code stream is pushed to the terminalat a speed higher than the normal playing speed of the video streaming, and the required pushing time to the terminal is t. The invention enables a user to rapidly preview, thereby reducing time-delay to a great extent.

Description

technical field [0001] The present invention relates to the technical field of streaming media coding and streaming transmission technology application, in particular to a method and system for pushing video streams based on layered coding. Background technique [0002] At present, with the development of China Telecom's IPTV business and e-surfing video service, we often provide users with video programs of different sizes, such as providing small video window programs on the home page of IPTV, and after users enter a live channel, it is Full-screen video programs; in the e-surfing video service, it is necessary to provide users with programs of different stream sizes according to the size of the user's mobile phone screen. [0003] For the existing encoding and decoding methods and channel preview methods of IPTV services and mobile phone services, it is necessary to encode according to the fixed maximum required code stream on the server side, and after the user terminal ...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08H04N7/24H04N7/26
Inventor 王换文
Owner CHINA TELECOM CORP LTD
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