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
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  • Application Information

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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

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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

Examples

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[0019] The invention relates to a method and system for pushing a video stream based on layered coding. The code stream is coded hierarchically on the layered encoding server to provide the base layer code stream and the enhancement layer code stream. The network access server caches the base layer code stream. When the user terminal initiates a channel switching request, the network access The incoming server pushes the basic 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 will also push the normal code stream to the user at the normal speed , The user terminal is presented to the user according to the normal clear code stream, realizing fast switching.

[0020] The technical solutions of the present invention will be further described in detail below through the embodiments of the drawings. The present invention is based on the layered coding video stream p...

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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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