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Received:November 25, 2009 Revised:January 11, 2010
Received:November 25, 2009 Revised:January 11, 2010
中文摘要: ITU-T G.723.1是一种用于多媒体通信的双码率语音编码标准，几乎在所有的语音网关设备上面g723.1音频编解码器都是必须支持的一个标准编解码器。针对G.723.1音频编解码算法尚未在BF532+uClinux平台上实时实现的情况，基于BF532+uClinux平台提出了该算法实时实现的优化方案。方案减少了编解码的时延,降低了算法的复杂度，编解码整体性能提升约10倍，满足了BF532+uClinux平台的实时性要求，并全部通过ITU测试向量的测试。最后将优化好的G723.1编解码器应用到嵌入式语音网
Abstract:This paper presents a full duplex, real-time implementation of ITU-G.723.1 speech coder using the BF 532 DSP chip with the uClinux embedded operating system. An optimization method is proposed in order to reduce the total necessary cycle time and the algorithm redundancy consumed in real-time implementation. The effect of the overall codec performance is about 10 times better than the traditional coding method and meet the real-time requirements of BF532 + uClinux platform, and all pass the test with the ITU test vectors. Finally, the optimized G723.1 code is applied to the embedded voice gateway. The experiments show that the voice calls are good .
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曾海平,孙建伟,吕斌,杨海波.G.723.1语音编码器在Blackfin平台上的实时实现①.计算机系统应用,2010,19(8):82-86
ZENG Hai-Ping,SUN Jian-Wei,LV Bin,YANG Hai-Bo.Real-Time Implementation of G.723.1 Speech Coder Using BF 532.COMPUTER SYSTEMS APPLICATIONS,2010,19(8):82-86
曾海平,孙建伟,吕斌,杨海波.G.723.1语音编码器在Blackfin平台上的实时实现①.计算机系统应用,2010,19(8):82-86
ZENG Hai-Ping,SUN Jian-Wei,LV Bin,YANG Hai-Bo.Real-Time Implementation of G.723.1 Speech Coder Using BF 532.COMPUTER SYSTEMS APPLICATIONS,2010,19(8):82-86
