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Quality comparison of low complexity 4800 bps self excited and code excited vocoders

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2 Author(s)
Rose, R.C. ; Georgia Institute of Technology, Atlanta, GA, U.S.A. ; Barnwell, T.P.

This paper presents a formal objective and subjective comparison of a number of LPC vocoders which operate at bit rates around 4800 bps. In this work, particular emphasis is placed on the Self Excited Vocoder (SEV), a new speech coding approach which was introduced by the authors at ICASSP86 [1]. Many members of a class of LPC vocoders of which the SEV, the well known Multiple Pulse Excited Linear Predictive Coder (MPLPC) [2], and Code Excited Linear Predictive Coder (CELPC) [3] are members, are simulated and compared. Through these experiments, the SEV is shown to be a low complexity, simply implemented speech coder that is competitive with the other coders in this class in producing high quality speech at low bit rates.

Published in:

Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '87.  (Volume:12 )

Date of Conference:

Apr 1987

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