DocumentCode
976562
Title
Frequency domain postfiltering for multiband excited linear predictive coding of speech
Author
Chan, C.F. ; Yu, E.W.M.
Author_Institution
Dept. of Electr. Eng., City Univ. of Hong Kong, Kowloon, Hong Kong
Volume
32
Issue
12
fYear
1996
fDate
6/6/1996 12:00:00 AM
Firstpage
1061
Lastpage
1063
Abstract
A frequency domain postfilter for multiband excited linear predictive (MBELP) coders is proposed. It is based on the principle of multiplying the signal band magnitudes by the postfilter magnitudes obtained by sampling the postfilter response at the pitch harmonics. This approach offers two major advantages: first, the signal energies before and after postfiltering can be equalised by simply rescaling the signal band magnitudes; and secondly, the phase information will be retained owing to only the magnitude spectra being modified. A fast method is given for sampling the postfilter magnitude spectrum characterised by line spectral pair (LSP) parameters
Keywords
digital filters; filtering theory; harmonics; linear predictive coding; signal sampling; speech coding; MBELP coders; fast method; frequency domain postfilter; line spectral pair parameters; linear predictive coding; multiband excited LPC; phase information; pitch harmonics; sampling; signal band magnitudes; speech;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19960763
Filename
502851
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