• Title/Summary/Keyword: vocoder pitch search

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Design of pitch parameter search architecture for a speech coder using dual MACs (Dual MAC을 이용한 음성 부호화기용 피치 매개변수 검색 구조 설계)

  • 박주현;심재술;김영민
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.33A no.5
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    • pp.172-179
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    • 1996
  • In the paper, QCELP (qualcomm code excited linear predictive), CDMA (code division multiple access)'s vocoder algorithm, was analyzed. And then, a ptich parameter seaarch architecture for 16-bit programmable DSP(digital signal processor) for QCELP was designed. Because we speed up the parameter search through high speed DSP using two MACs, we can satisfy speech codec specifiction for the digital celluar. Also, we implemented in FIFO(first-in first-out) memory using register file to increase the access time of data. This DSP was designed using COMPASS, ASIC design tool, by top-down design methodology. Therefore, it is possible to cope with rapid change at mobile communication market.

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