The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Fixed-point performance analysis and implementation of the FS-CELP vocoder

FS-CELP 음성 부호화기의 고정 소수점 성능 분석 및 구현

  • 손종서 (서울대학교 공과대학 전기공학부 및 반도체 공동 연구소) ;
  • 김시현 (서울대학교 공과대학 전기공학부 및 반도체 공동 연구소) ;
  • 강지양 (서울대학교 공과대학 전기공학부 및 반도체 공동 연구소) ;
  • 성원용 (서울대학교 공과대학 전기공학부 및 반도체 공동 연구소)
  • Published : 1996.02.01
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Abstract

Finite wordlength effects of the FS-1016 CELP(Code Excite Linear Prediction) vocoder algorithm) is analyzed, and a block floating-Point implementation method is employed to improve the fixed-point performance. An efficient run-time integer wordlength estimation algorithm is developed, and the overall system performance. An efficient run-time integer wordlength estimation algorithm is developed, and the overall system performance is verified in real-time using a TMS320C50 emulation board. Autoscaler software that conducts simulation-based automatic scaling to provide a floating-point like programming environment is used for this application development.

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