A negotiation method for 3G video gateway multi-media decoding and encoding capability

Abstract

This invention relates to one 3G visual network gate multi-media decoding ability negotiation method, which comprises the following steps: a, VIG receives 3G-H324M terminal and H323 terminal send ability require of TCS message and recording decodes by computation with self supportive decode cross set to get first and second decode list; b, judging whether the first and second decode sequence is zero, if yes, releasing calls, if not execution next steps; c, VIG computes the first and second decodes list to get third decode line to judge whether the decode sequence is zero.

Description

technical field [0001] The invention relates to the field of H245 multimedia control signaling of a 3G video gateway (VIG, Video Internet Gateway) and H323 network interface, in particular to a method for negotiation of H245 signaling terminal capabilities in the 3G video gateway. Background technique [0002] The 2G era is the era when G711 voice coding dominates the world. Except for the difference between the G711-A law used internationally and the G711-μ law used in North America, there is basically no codec negotiation and conversion. However, in the 3G era, due to the development of voice coding technology and the need to support video services, the types and capabilities of terminals vary widely, and the requirements for non-single and efficient application of network bandwidth make the negotiation and conversion of voice and video codecs between terminals a one-off process. necessary. [0003] In the 3G specification, video calls in the CS (Circuit Switched) domain ...

AI Technical Summary

Problems solved by technology

[0010] 3G-H324M requires AMR and G723.1 audio codecs, H263 and MPEG4 video codecs; G723.1 and G711 voice codecs and H263 and H261 video codecs supported by H323 networks, but for terminals Due to various reasons, the device manufacturer only supports some of the specifications required, but may add other codec capabilities it prefers

[0019] 2. Since the logical channel is usually established in one direction, for the same media (such as voice or video), even if all types of terminals support it, the types established in the two directions are different

[0021] 1. For the VIG gateway, there is no need to perform codec type conversion calls. Since there are multiple options for the terminal, the real choice may cause VIG to perform codec conversion, resulting in waste of resources and media distortion caused by type conversion;

[0022] 2. For some terminal equipment, for the same media, because the two directions of sending and receiving cannot support different types of codecs at the same time, the call is abnormal

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