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System and method for implementing encoding and decoding conversion function

A conversion function and codec technology, which is applied in the system field of realizing codec conversion in NGN, can solve the problems of complex codec conversion control process and difficult implementation, and achieve the effect of saving equipment investment cost and development cost.

Active Publication Date: 2012-05-16
ZTE CORP
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a system and method for realizing the codec conversion function. The present invention does not require softswitch control, solves the problem that the codec conversion control process of the softswitch is complicated and difficult to implement, and improves the application of MG sex

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  • System and method for implementing encoding and decoding conversion function
  • System and method for implementing encoding and decoding conversion function
  • System and method for implementing encoding and decoding conversion function

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Embodiment Construction

[0023] The invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments.

[0024] Such as figure 1 As shown, it is a schematic diagram of the connection between MG and softswitch in the present invention; the system of the present invention includes softswitch and MG, the softswitch is at least two, and belongs to different domains, and is used to complete call control; the MG includes The DSP unit is used to provide at least two virtual gateways, and when a call in a different domain is accessed, judge whether the call needs codec conversion; when codec conversion is required, allocate SDP resources for the call and complete the call. The connection of the required media channel and the activation of the DSP unit to complete the codec conversion; when the codec conversion is not required, only the connection of the media channel required for the call is completed; the DSP unit is used to provide DSP resources and ...

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Abstract

The invention relates to a system and a method for realizing the transformation of the NGN codec, the system comprises at least two soft switches belonging to different domains and a media network gateway MG serving the function of virtual network gateway; the method comprises the following steps: firstly dividing the MG into at least two virtual network gateways, and connected each virtual network gateway with the soft switches in the different domains respectively; when callings in the different domains are accessed, the MG distributes resources for the calling / called party of the callings and determines whether the codec transformation is required between the temporary destination nodes of the calling / called party, if the codec transformation is required, connecting the corresponding virtual network gateway of the domain, to which the calling / called party belongs, and activating the DSP unit to carry out the codec transformation; and if the codec transformation is not required, directly establishing the connection for the calling. The invention solves the problems that the codec transformation control process of the soft switch is complicated and not easily realized, thereby improving the applicability of the MG.

Description

technical field [0001] The present invention relates to the field of NGN (Next Generation Network, next generation network) communication, more specifically, it is a system and method for realizing codec conversion in NGN. Background technique [0002] With the continuous development of VOIP (Voice Over IP, Internet telephony), the gateway equipment at the tandem (gateway) office level needs to have the function of trans coding conversion (Trans Coding), which converts one VOIP codec format into another codec formatted. The main application scenarios are: codec conversion between different operators, such as configuring codec conversion gateways between different operator networks, providing G.711 codec commonly used in fixed softswitch networks and commonly used in Conversion between codecs of EVRC (Enhanced Variable Rate Codec) of the mobile softswitch network; codec conversion between countries, such as the use of codec conversion gateways in international gateway office...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/66H04W84/02H04L29/06
Inventor 孙红军
Owner ZTE CORP
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