NDLI: Optimizing LPC filter parameters for multi-pulse excitation

Content Provider	IEEE Xplore Digital Library
Author	Singhal, S. Atal, B.
Copyright Year	1983
Description	Author affiliation: Bell Laboratories, Murray Hill, New Jersey (Singhal, S.)
Abstract	Present LPC analysis procedures assume that the input to the all-pole filter is white; the filter parameters are obtained by minimizing the mean-squared error between the filter output samples and their values obtained by linear prediction on the basis of past output samples. It is well known that these procedures often do not yield accurate filter parameters for periodic (or quasi-periodic) signals such as voiced speech. To compensate for the periodic nature of speech, an estimate of the excitation of the all-pole filter has to be made. Multi-pulse LPC obtains the best excitation for a specified bit rate by minimizing a weighted mean-squared criterion representing subjectively important differences between original and synthetic speech signals. In this paper we examine the possibility that multi-pulse excitation can approximate the all-pole filter excitation sufficiently closely and obtain the optimum filter parameters for this excitation.
Starting Page	781
Ending Page	784
File Size	86797
Page Count	4
File Format	PDF
DOI	10.1109/ICASSP.1983.1172137
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-04-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Linear predictive coding Bit rate Synthesizers Speech analysis Speech synthesis Nonlinear filters Low pass filters Signal analysis Vocoders Speech coding
Content Type	Text
Resource Type	Article

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