CODING/DECODING CONVERSION CONTROL METHOD, MEDIA GATEWAY AND SYSTEM UNDER SOFT-SWITCH ARCHITECTURE

摘要

The present invention provides a method, media gateway and system for controlling encoding and decoding transcoding under Softswitch architecture, wherein this method includes: a media gateway obtaining an encoding and decoding algorithm capability set supported by a first terminal; the media gateway obtaining an encoding and decoding algorithm used by a second terminal; the media gateway judging whether the encoding and decoding algorithm used by the second terminal is in the encoding and decoding algorithm capability set supported by the first terminal, and if yes, not applying for a voice transcoder card (VTC) channel, and directly carrying out transparent transmission on a service of the first terminal and the second terminal; or else, applying for the VTC channel, taking use of the VTC channel to carry out encoding and decoding algorithm transcoding on the service of the first terminal and the second terminal, and carrying out transmission on a transcoded service. The scheme of the present invention saves the VTC channel resources, reduces the device cost and maintenance cost, and improves the communication efficiency and connection rate of the calling and called terminals.