Noise post processing based on a stationary noise generator

H. Ehara, K. Yasunaga, Y. Hiwasaki, Kazunori Mano

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

1 Citation (Scopus)

Abstract

The paper presents a newly developed noise post-processing (NPP) algorithm for improving subjective performance of low bit-rate code excited linear prediction (CELP) decoding. The algorithm is based on a stationary noise generator and improves subjective quality of a noisy signal input. A backward adaptive detector defines noisy input signal segments from decoded line spectral frequency (LSF), energy, and pitch parameters. By using LSF and energy parameters from the past, the noise generator estimates and produces stationary noise. The algorithm is independent of the main codec algorithm and is applicable to any CELP decoder. When applied to G.729 and G.723.1, our test results show that the algorithm improves subjective performance at around 0.2-0.8 in degradation category rating (DCR) mean opinion score (DMOS) under several background noise conditions.

Original languageEnglish
Title of host publication2002 IEEE Speech Coding Workshop: A Paradigm Shift Toward New Coding Functions for the Broadband Age, SCW 2002 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages178-180
Number of pages3
ISBN (Print)0780375491, 9780780375499
DOIs
Publication statusPublished - 2002
Externally publishedYes
EventIEEE Speech Coding Workshop, SCW 2002 - Tsukuba City, Ibaraki, Japan
Duration: 2002 Oct 62002 Oct 9

Other

OtherIEEE Speech Coding Workshop, SCW 2002
CountryJapan
CityTsukuba City, Ibaraki
Period02/10/602/10/9

Fingerprint

Noise generators
Processing
energy
performance
Decoding
rating
Detectors
Degradation

ASJC Scopus subject areas

  • Linguistics and Language
  • Computer Vision and Pattern Recognition
  • Human-Computer Interaction
  • Software
  • Language and Linguistics

Cite this

Ehara, H., Yasunaga, K., Hiwasaki, Y., & Mano, K. (2002). Noise post processing based on a stationary noise generator. In 2002 IEEE Speech Coding Workshop: A Paradigm Shift Toward New Coding Functions for the Broadband Age, SCW 2002 - Proceedings (pp. 178-180). [1215764] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SCW.2002.1215764

Noise post processing based on a stationary noise generator. / Ehara, H.; Yasunaga, K.; Hiwasaki, Y.; Mano, Kazunori.

2002 IEEE Speech Coding Workshop: A Paradigm Shift Toward New Coding Functions for the Broadband Age, SCW 2002 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2002. p. 178-180 1215764.

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

Ehara, H, Yasunaga, K, Hiwasaki, Y & Mano, K 2002, Noise post processing based on a stationary noise generator. in 2002 IEEE Speech Coding Workshop: A Paradigm Shift Toward New Coding Functions for the Broadband Age, SCW 2002 - Proceedings., 1215764, Institute of Electrical and Electronics Engineers Inc., pp. 178-180, IEEE Speech Coding Workshop, SCW 2002, Tsukuba City, Ibaraki, Japan, 02/10/6. https://doi.org/10.1109/SCW.2002.1215764
Ehara H, Yasunaga K, Hiwasaki Y, Mano K. Noise post processing based on a stationary noise generator. In 2002 IEEE Speech Coding Workshop: A Paradigm Shift Toward New Coding Functions for the Broadband Age, SCW 2002 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2002. p. 178-180. 1215764 https://doi.org/10.1109/SCW.2002.1215764
Ehara, H. ; Yasunaga, K. ; Hiwasaki, Y. ; Mano, Kazunori. / Noise post processing based on a stationary noise generator. 2002 IEEE Speech Coding Workshop: A Paradigm Shift Toward New Coding Functions for the Broadband Age, SCW 2002 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2002. pp. 178-180
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