MRFP模块音频媒体能力的设计与实现

Design and Implementation of Audio Processing Ability in MRFP Module

IMS网络中MRFP模块实现了IMS网络的媒体资源承载功能,具体包括音频媒体流编解码、转换、混合及播放等功能。为了能提供良好的媒体资源承载能力,MRFP模块需要有高度并发处理音频的能力。同时,MRFP模块还必须可以稳定地提供媒体处理能力。本文基于Elang开发语言及相应的电信开放平台,通过设计和实现一个高度并发及高度稳定的音频媒体处理系统,以使得MRFP模块的音频媒体承载能力可以得到进一步提升。

MRFP（Multimedia Resource Function Processor） module in IMS（IP Multimedia Subsystem） provides the ability of media processing like audio streams encoding and decoding, audio format conversion, audio streams mixing and audio playing, etc. MRFP module should be designed as a system which has the ability of highly concurrent processing of audio streams so that it can process tremendous number of audio streams simultaneously. Meanwhile, MRFP should be capable of processing audio streams stably. Based on the Erlang programming language and Erlang/OTP （Open Telecom Platform）, the paper designs and implements a system which possesses the capabilities of highly concurrent handling audio streams and long-term stable operation on media data, to promote the audio processing performance of MRFP module.