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Multi-media data transmission method, system and device

A multimedia data and unified technology, applied in the direction of image communication, selective content distribution, electrical components, etc., can solve the problems of not being able to provide service quality differences, distinguishing video streams, and not being able to transmit SVC video services

Inactive Publication Date: 2011-06-15
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, at present, multiplexed subframes can only be used to encapsulate streaming media data such as video and audio for transmission. The quality of the transmitted video streaming data is fixed, and SVC video services cannot be transmitted in the CMMB system, that is, the existing CMMB The system cannot yet provide video streams with differentiated quality of service

Method used

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  • Multi-media data transmission method, system and device

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Embodiment Construction

[0035] In the embodiment of the present invention, carry out hierarchical video coding to the video stream in the video service, generate base layer code stream and at least one enhancement layer code stream, each layer code stream is encapsulated in the same multiplexing subframe of CMMB broadcast channel frame respectively , and encapsulate the decoding information of each layer code stream into the multiplexing subframe, so that after the multiplexing subframe carried by the CMMB broadcast channel frame arrives at the receiving end, the receiving end receives the code stream of each layer carried in the CMMB broadcast channel frame The receiving end decodes the multiplexed subframe according to the decoding information of each layer code stream in the multiplexed subframe, obtains the corresponding video stream and outputs it.

[0036] Wherein, when the receiving end can determine only to process the base layer code stream according to its own processing capability, it can d...

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Abstract

The invention discloses a multi-media data transmission method, system and device, which is used for realizing transmission of differentiated video streams with different service qualities in a China mobile multimedia broadcasting (CMMB) system. The method comprises the following steps: encoding the video streams in a video service to generate a code stream in a base layer and at least one code stream in an enhancement layer; carrying out capsulation on the generated code stream in the base layer and each generated code stream in the enhancement layer in a same multiplexing subframe of a broadcast channel frame; performing capsulation on decoding information on the code streams in each layer in the multiplexing subframe; and sending the broadcast channel frame. According to the embodiment of the invention, the code stream in the base layer and the at least one code stream in the enhancement layer are sent in the multiplexing subframe, thus realizing transmission of video streams of a switching virtual circuit (SVC) in the CMMB system.

Description

technical field [0001] The invention relates to the technical field of mobile multimedia broadcasting, in particular to a method, system and device for transmitting multimedia data. Background technique [0002] With the development of communication technology, the application of mobile multimedia broadcasting technology is becoming wider and wider. At present, the China Mobile Multimedia Broadcasting (CMMB) system standard specifies the frame structure, channel coding and modulation, etc. Among them, the composition structure of the broadcast channel frame is as follows figure 1 As shown, the broadcast channel frame K includes: multiple multiplexing frames. Specific as figure 1 The shown multiplexing frame 0 is used to transmit control information, and multiplexing frames 1, . . . , multiplexing frame n are all used to transmit service data. Wherein, each multiplexed frame for transmitting service data includes: a multiplexed frame header, a multiplexed frame payload, a...

Claims

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Application Information

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IPC IPC(8): H04N21/236H04N21/8547
CPCH04N21/236H04N21/234327H04N21/8547
Inventor 陈光亮谢文军张建强
Owner ZTE CORP
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