【摘要】 ITU G.726建议的语音编码方案是一套从16kbit/s到40kbit/s的完整速率ADPCM算法。本文介绍了有关的算法原理和在一片ADSP-2181定点DSP芯片上实时实现该编解码器过程中的软、硬件结构。更多还原

【Abstract】 G.726 are recommended for the conversion of a 64kbit/s A-law orμ-law pulse code modulation(PCM) to and from a 40,32,24 or 16 kbit/s channel. The conversion is applied to the PCM bit stream using an ADPCM transcoding technique. In this paper, the principle of this algorithm and its implementation on a single chip of fixed-point ADSP-2181 DSP are presented, including the structure of hardware and software in the process of implementation.更多还原