Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder

Hironobu Chiba; Yutaka Kamamoto; Takehiro Moriya; Noboru Harada; Shigeki Miyabe; Takeshi Yamada; Shoji Makino

doi:10.1109/ACSSC.2014.7094568

Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder

Hironobu Chiba, Yutaka Kamamoto, Takehiro Moriya, Noboru Harada, Shigeki Miyabe, Takeshi Yamada, Shoji Makino

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Most speech codecs utilize a post-filter that emphasizes pitch structures to enhance perceptual quality at the decoder. Particularly, the bass post-filter used in ITU-T G.718 performs an adaptive pitch enhancement technique for a lower fixed frequency band. This paper describes a new post-filtering method in which the bass the frequency band and the gain are adaptively controlled frame-by-frame depending on the pitch frequency of decoded signal to improve bass post-filter performance. We have confirmed the improvement of the speech quality with the developed method through objective and subjective evaluations.

Original language	English
Title of host publication	Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers
Editors	Michael B. Matthews
Publisher	IEEE Computer Society
Pages	838-842
Number of pages	5
ISBN (Electronic)	9781479982974
DOIs	https://doi.org/10.1109/ACSSC.2014.7094568
Publication status	Published - 2015 Apr 24
Externally published	Yes
Event	48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015 - Pacific Grove, United States Duration: 2014 Nov 2 → 2014 Nov 5

Publication series

Name	Conference Record - Asilomar Conference on Signals, Systems and Computers
Volume	2015-April
ISSN (Print)	1058-6393

Conference

Conference	48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015
Country/Territory	United States
City	Pacific Grove
Period	14/11/2 → 14/11/5

ASJC Scopus subject areas

Signal Processing
Computer Networks and Communications

Access to Document

10.1109/ACSSC.2014.7094568

Cite this

Chiba, H., Kamamoto, Y., Moriya, T., Harada, N., Miyabe, S., Yamada, T., & Makino, S. (2015). Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder. In M. B. Matthews (Ed.), Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers (pp. 838-842). Article 7094568 (Conference Record - Asilomar Conference on Signals, Systems and Computers; Vol. 2015-April). IEEE Computer Society. https://doi.org/10.1109/ACSSC.2014.7094568

Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder. / Chiba, Hironobu; Kamamoto, Yutaka; Moriya, Takehiro et al.
Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers. ed. / Michael B. Matthews. IEEE Computer Society, 2015. p. 838-842 7094568 (Conference Record - Asilomar Conference on Signals, Systems and Computers; Vol. 2015-April).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Chiba, H, Kamamoto, Y, Moriya, T, Harada, N, Miyabe, S, Yamada, T & Makino, S 2015, Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder. in MB Matthews (ed.), Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers., 7094568, Conference Record - Asilomar Conference on Signals, Systems and Computers, vol. 2015-April, IEEE Computer Society, pp. 838-842, 48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015, Pacific Grove, United States, 14/11/2. https://doi.org/10.1109/ACSSC.2014.7094568

Chiba H, Kamamoto Y, Moriya T, Harada N, Miyabe S, Yamada T et al. Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder. In Matthews MB, editor, Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers. IEEE Computer Society. 2015. p. 838-842. 7094568. (Conference Record - Asilomar Conference on Signals, Systems and Computers). doi: 10.1109/ACSSC.2014.7094568

Chiba, Hironobu ; Kamamoto, Yutaka ; Moriya, Takehiro et al. / Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder. Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers. editor / Michael B. Matthews. IEEE Computer Society, 2015. pp. 838-842 (Conference Record - Asilomar Conference on Signals, Systems and Computers).

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Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder

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