Adaptive bit-allocation between the pole-zero synthesis filter and excitation in CELP

Kimio Miseki, Masami Akamine

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The authors propose a CELP (code-excited linear prediction) coder with a novel adaptive bit allocation between the synthesis filter and excitation by changing the filter type between an all-pole filter and a pole-zero filter. The filter type and bit allocation are determined based on the minimum perceptually weighted error criterion. When on all-pole filter is selected as the synthesis filter, the input speech is coded in the same manner as a conventional CELP coder. When a pole-zero filter is selected, the zero filter's coefficients are coded in a closed loop. Experimental results reveal that the proposed CELP coder improves segmental signal-to-noise ratio by approximately 1 dB over a conventional CELP coder at 4.3 kb/s.

Original languageEnglish
Title of host publicationProceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
PublisherPubl by IEEE
Pages229-232
Number of pages4
ISBN (Print)0780300033
DOIs
Publication statusPublished - 1991 Jan 1
Externally publishedYes
EventProceedings of the 1991 International Conference on Acoustics, Speech, and Signal Processing - ICASSP 91 - Toronto, Ont, Can
Duration: 1991 May 141991 May 17

Publication series

NameProceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
Volume1
ISSN (Print)0736-7791

Other

OtherProceedings of the 1991 International Conference on Acoustics, Speech, and Signal Processing - ICASSP 91
CityToronto, Ont, Can
Period91/5/1491/5/17

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Adaptive bit-allocation between the pole-zero synthesis filter and excitation in CELP'. Together they form a unique fingerprint.

Cite this