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Media flow transmission address consulting method

A stream transmission and media stream technology, applied in the field of communication, can solve problems such as inability to support different codec formats, specify transmission addresses, etc.

Inactive Publication Date: 2007-03-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0076] The present invention provides a media stream transmission address negotiation method to solve the problem that the existing media stream transmission address negotiation cannot support the specified transmission address for different codec formats of the media stream

Method used

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Embodiment Construction

[0095] In order to enable the devices participating in the media stream transmission to complete the negotiation of the media stream transmission address when a media stream can support multiple codecs and hope to select different transmission addresses according to different codecs, the present invention uses the SIP message In the included Session Description Protocol (SDP) information, corresponding transmission addresses are specified for some or all codec formats of media streams that are expected or willing to be established, so that the devices participating in the negotiation can select corresponding transmission addresses according to different codec formats.

[0096] For the party initiating the negotiation, in the SDP part of the SIP signaling message, specify the corresponding transmission address for some or all codec formats of the media stream to be established; the party receiving the SIP signaling message can choose one of them codec format and notify the o...

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Abstract

The invention discloses a media steam transmission address negotiating method, transmitting a message containing session description protocol (SDP) information by first equipment to second equipment, respectively appointing corresponding transmission addresses in the SDP information in accordance with partial or all coding-decoding formats the first equipment desire to build; the second equipment obtains various coding-decoding formats of the media flow desired and corresponding transmission addresses from the SDP information in the received message, determines a desired coding-decoding format and returns a response message containing the desired coding-decoding format and corresponding transmission address.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a negotiation method based on a session description protocol (SDP) media stream transmission address. Background technique [0002] At present, multimedia services based on IP networks are being used more and more widely. Technically speaking, the realization of this service mainly includes two aspects: signaling control part, media processing and transmission. The signaling part is used to establish a session relationship between communication entities and complete the negotiation of communication parameters between the two parties. The media processing part mainly adopts specific media stream packaging and transmission methods to communicate media streams according to the result of signaling negotiation. For the transmission of real-time media streams such as audio or video, the real-time transport protocol (RTP protocol) is mainly used, and for the media stream transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/02
CPCH04L69/24H04L65/1006H04L29/06537H04L29/06272H04L29/06027H04L29/06197H04L65/1043H04L65/1104
Inventor 徐培利
Owner HUAWEI TECH CO LTD