Speech Quality Measure For VoIP Using Wavelet Based Bark Coherence Function 


Vol. 27,  No. 4, pp. 310-315, Apr.  2002


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  Abstract

The Bark Coherence Function (BCF) defines a coherence function within perceptual domain as a new cognition module, robust to linear distortions due to the analog interface of digital mobile system. Our previous experiments have shown the superiority of BCF over current measures. In this paper, a new BCF suitable for VoIP is developed. The Improved BCF is based on the wavelet series expansion that provides good frequency resolution while keeping good time locality. The proposed Wavelet based Bark Coherence Function (WBCF) is robust to variable delay often observed in packet-based telephony such as Voice over Internet Protocol (VoIP). We also show that the refinement of time synchronization after signal decomposition can improve the performance of the WBCF. The regression analysis was performed with VoIP speech data. The correlation coefficients and the standard error of estimates computed using the WBCF showed noticeable improvement over the Perceptual Speech Quality Measure (PSQM) that is recommended by ITU-T.

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  Cite this article

[IEEE Style]

S. Park, Y. Park, D. Youn, "Speech Quality Measure For VoIP Using Wavelet Based Bark Coherence Function," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 4, pp. 310-315, 2002. DOI: .

[ACM Style]

Sang-Wook Park, Young-Cheol Park, and Dae-Hee Youn. 2002. Speech Quality Measure For VoIP Using Wavelet Based Bark Coherence Function. The Journal of Korean Institute of Communications and Information Sciences, 27, 4, (2002), 310-315. DOI: .

[KICS Style]

Sang-Wook Park, Young-Cheol Park, Dae-Hee Youn, "Speech Quality Measure For VoIP Using Wavelet Based Bark Coherence Function," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 4, pp. 310-315, 4. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880