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DSP audio compression system based on G.723.1

机译：基于G.723.1的DSP音频压缩系统

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摘要

This paper introduces an audio compression system based on G.723.1 algorithm. The system is able to work in full duplex pattern as it can compress and decompress the received data at the same time. The system works on TI's TMS320C5509A which is a fixed-point digital signal processor. The DSP chip uses MCBSP (Multi-Channel Buffered Serial Port) to receive and transfer data between codec chip AIC23 and DMA (Direct Memory Access). G.723.1 algorithm is transplanted to DSP chip and optimized in order to meet the requirement of the system. Four methods are introduced in this paper to optimize the algorithm. After optimization, the time of compression and decompression is reduced from more than 310ms to 11ms. This system use RS232 to communicate with other upper monitor.
机译：介绍了一种基于G.723.1算法的音频压缩系统。该系统能够以全双工模式工作，因为它可以同时压缩和解压缩接收到的数据。该系统可在TI的TMS320C5509A（定点数字信号处理器）上运行。 DSP芯片使用MCBSP（多通道缓冲串行端口）在编解码器芯片AIC23和DMA（直接存储器访问）之间接收和传输数据。 G.723.1算法被移植到DSP芯片上并进行了优化以满足系统的要求。本文介绍了四种优化算法的方法。经过优化后，压缩和解压缩的时间从310ms以上减少到11ms。该系统使用RS232与其他上位显示器进行通信。

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