Research Article Open Access

Analytical Study of High Pitch Delay Resolution Technique for Tonal Speech Coding

Suphattharachai Chomphan1 and Chutarat Chompunth2
  • 1 Department of Electrical Engineering, Faculty of Engineering at Si Racha, Kasetsart University, 199 M.6, Tungsukhla, Si Racha, Chonburi, 20230, Thailand
  • 2 School of Social and Environmental Development, National Institute of Development Administration, 118 M.3, Serithai Road, Klong-Chan, Bangkapi, Bangkok, 10240, Thailand

Abstract

Problem statement: In tonal-language speech, since tone plays important role not only on the naturalness and also the intelligibility of the speech, it must be treated appropriately in a speech coder algorithm. Approach: This study proposes an analytical study of the technique of High Pitch Delay Resolutions (HPDR) applied to the adaptive codebook of core coder of Multi-Pulse based Code Excited Linear Predictive (MP-CELP) coder. Results: The experimental results show that the speech quality of the MP-CELP speech coder with HPDR technique is improved above the speech quality of the conventional coder. An optimum resolution of pitch delay is also presented. Conclusion: From the analytical study, it has been found that the proposed technique can improve the speech coding quality.

American Journal of Applied Sciences
Volume 9 No. 3, 2012, 350-353

DOI: https://doi.org/10.3844/ajassp.2012.350.353

Submitted On: 10 December 2011 Published On: 23 January 2012

How to Cite: Chomphan, S. & Chompunth, C. (2012). Analytical Study of High Pitch Delay Resolution Technique for Tonal Speech Coding. American Journal of Applied Sciences, 9(3), 350-353. https://doi.org/10.3844/ajassp.2012.350.353

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Keywords

  • High Pitch Delay Resolutions (HPDR)
  • Multi-Pulse based Code Excited Linear Predictive (MP-CELP)
  • speech coding
  • speech compression
  • tone