Quality enhancement of CELP coded speech by using an MFCC based Gaussian Mixture Model

D. G. Raza; C. F. Chan

Quality enhancement of CELP coded speech by using an MFCC based Gaussian Mixture Model

D. G. Raza
, C. F. Chan

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

2 Citations (Scopus)

Abstract

At low bit rates CELP coders present certain artifacts generally known as hoarse and muffing characteristics. An enhancement system is developed to lessen the effects of these artifacts in CELP coded speech. In enhancement system, the high frequency components (4kHz-8kHz) are reinserted to reduce the muffing characteristics. This is achieved by using an MFCC based Gaussian Mixture Model. The hoarse characteristics are reduced by re-synthesizing the CELP reproduced speech with harmonic plus noise model. The pair-wise listening experiment results show that the re-synthesized wideband speech is preferred over the CELP coded speech. The enhanced speech is affirmed to be pleasant to listen and exhibits the naturalness of the original wideband speech.

Original language	English
Title of host publication	EUROSPEECH 2003 - 8th European Conference on Speech Communication and Technology
Publisher	International Speech Communication Association
Pages	541-544
Publication status	Published - 2003
Event	8th European Conference on Speech Communication and Technology, EUROSPEECH 2003 - Geneva, Switzerland Duration: 1 Sept 2003 → 4 Sept 2003

Conference

Conference	8th European Conference on Speech Communication and Technology, EUROSPEECH 2003
Place	Switzerland
City	Geneva
Period	1/09/03 → 4/09/03

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@inproceedings{2af34872c9524397afff9c029a9a1b08,

title = "Quality enhancement of CELP coded speech by using an MFCC based Gaussian Mixture Model",

abstract = "At low bit rates CELP coders present certain artifacts generally known as hoarse and muffing characteristics. An enhancement system is developed to lessen the effects of these artifacts in CELP coded speech. In enhancement system, the high frequency components (4kHz-8kHz) are reinserted to reduce the muffing characteristics. This is achieved by using an MFCC based Gaussian Mixture Model. The hoarse characteristics are reduced by re-synthesizing the CELP reproduced speech with harmonic plus noise model. The pair-wise listening experiment results show that the re-synthesized wideband speech is preferred over the CELP coded speech. The enhanced speech is affirmed to be pleasant to listen and exhibits the naturalness of the original wideband speech.",

author = "Raza, \{D. G.\} and Chan, \{C. F.\}",

year = "2003",

language = "English",

pages = "541--544",

booktitle = "EUROSPEECH 2003 - 8th European Conference on Speech Communication and Technology",

publisher = "International Speech Communication Association",

note = "8th European Conference on Speech Communication and Technology, EUROSPEECH 2003 ; Conference date: 01-09-2003 Through 04-09-2003",

}

Raza, DG & Chan, CF 2003, Quality enhancement of CELP coded speech by using an MFCC based Gaussian Mixture Model. in EUROSPEECH 2003 - 8th European Conference on Speech Communication and Technology. International Speech Communication Association, pp. 541-544, 8th European Conference on Speech Communication and Technology, EUROSPEECH 2003, Geneva, Switzerland, 1/09/03.

Quality enhancement of CELP coded speech by using an MFCC based Gaussian Mixture Model. / Raza, D. G.; Chan, C. F.
EUROSPEECH 2003 - 8th European Conference on Speech Communication and Technology. International Speech Communication Association, 2003. p. 541-544.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Quality enhancement of CELP coded speech by using an MFCC based Gaussian Mixture Model

AU - Raza, D. G.

AU - Chan, C. F.

PY - 2003

Y1 - 2003

N2 - At low bit rates CELP coders present certain artifacts generally known as hoarse and muffing characteristics. An enhancement system is developed to lessen the effects of these artifacts in CELP coded speech. In enhancement system, the high frequency components (4kHz-8kHz) are reinserted to reduce the muffing characteristics. This is achieved by using an MFCC based Gaussian Mixture Model. The hoarse characteristics are reduced by re-synthesizing the CELP reproduced speech with harmonic plus noise model. The pair-wise listening experiment results show that the re-synthesized wideband speech is preferred over the CELP coded speech. The enhanced speech is affirmed to be pleasant to listen and exhibits the naturalness of the original wideband speech.

AB - At low bit rates CELP coders present certain artifacts generally known as hoarse and muffing characteristics. An enhancement system is developed to lessen the effects of these artifacts in CELP coded speech. In enhancement system, the high frequency components (4kHz-8kHz) are reinserted to reduce the muffing characteristics. This is achieved by using an MFCC based Gaussian Mixture Model. The hoarse characteristics are reduced by re-synthesizing the CELP reproduced speech with harmonic plus noise model. The pair-wise listening experiment results show that the re-synthesized wideband speech is preferred over the CELP coded speech. The enhanced speech is affirmed to be pleasant to listen and exhibits the naturalness of the original wideband speech.

UR - https://www.scopus.com/pages/publications/85009198129

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85009198129&origin=recordpage

M3 - RGC 32 - Refereed conference paper (with host publication)

SP - 541

EP - 544

BT - EUROSPEECH 2003 - 8th European Conference on Speech Communication and Technology

PB - International Speech Communication Association

T2 - 8th European Conference on Speech Communication and Technology, EUROSPEECH 2003

Y2 - 1 September 2003 through 4 September 2003

ER -

Quality enhancement of CELP coded speech by using an MFCC based Gaussian Mixture Model

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