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Complexity reduction of CELP speech coders through the use of phase information

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2 Author(s)
Ramabadran, T.V. ; Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA ; Lueck, C.D.

An efficient search procedure for CELP coders is described. Based on the phase spectra of the codevectors and the ideal excitation vector, a subset of the codebook is preselected. This subset is then exhaustively searched to find the best, perhaps optimum, codevector. Computational savings of the order of 30-40 are achieved while still maintaining good output speech quality

Published in:

Communications, IEEE Transactions on  (Volume:42 ,  Issue: 234 )

Date of Publication:

Feb/Mar/Apr 1994

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