Multilevel Delta Modulation with Switched First-Order Prediction for Wideband Speech Coding

Authors

  • Zoran Peric
  • Bojan Denic
  • Vladimir Despotovic

DOI:

https://doi.org/10.5755/j01.eie.24.1.20156

Keywords:

Quantization, Delta modulation, Correlation coefficient, Speech coding, Signal to noise ratio.

Abstract

In this paper a delta modulation speech coding scheme based on the ITU-T G.711 standard and the switched first-order predictor is presented. The forward adaptive scheme is used, where the adaptation to the signal variance is performed on frame-by-frame basis. The classification of the frames into weakly and highly correlated was done based on the correlation coefficient calculated for each frame, providing a basis for choosing the appropriate predictor coefficient. The obtained results indicate that the proposed model significantly outperforms the scalar companding system based on the G.711 standard. The obtained experimental results were verified using the theoretical model in the wide dynamic range of the input variance.

DOI: http://dx.doi.org/10.5755/j01.eie.24.1.20156

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Published

2018-02-12

How to Cite

Peric, Z., Denic, B., & Despotovic, V. (2018). Multilevel Delta Modulation with Switched First-Order Prediction for Wideband Speech Coding. Elektronika Ir Elektrotechnika, 24(1), 46-51. https://doi.org/10.5755/j01.eie.24.1.20156

Issue

Vol. 24 No. 1 (2018)

Section

SIGNAL TECHNOLOGY

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