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A Segmented P-255 Law PCM Voice Encoder Utilizing NMOS Technology

By Yannis P. Tsividis, Paul R. Gray, Senior Member, David A. Hodges, Senior Member and Jacob Chacko


Abstract –A techrdqrre for pulsecode modulation (PCM) encoding ac-cording to the 15-segment approximation to the P-255 krw is deseribed. The technique makes possible the realization of a one-channel encoder together with the associated sample/hold function as a single NMOS integrated circuit. The requirements imposed on the individual com-ponents for satisfactory system performance are investigated, and it is shown that a performance can be achieved which is comparable with that required in toll qualit y PCM telephone transmission. Experimental results from a partiatly integrated prototype are presented

Year: 2009
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