A single chip QCELP vocoder for CDMA digital cellular

This paper describes a full-custom ASIC implementation of the QCELP voice compression algorithm. Applications for the ASIC are code division multiple access (CDMA) based cellular, personal-communications-networks (PCN), and wireless local loop. The ASIC contains a custom DSP core, utilizing internal RAM and ROM and a co-processor, which were optimized to perform QCELP and related voice-band processing. Key design concerns were power consumption, area, flexibility, and testability.<
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