Multilevel delta modulation with switched first-order prediction for wideband speech coding

Zoran Peric, Bojan Denic, Vladimir Despotovic

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)46-51
Number of pages6
JournalElektronika ir Elektrotechnika
Issue number1
Publication statusPublished - 2018
Externally publishedYes


  • Correlation coefficient
  • Delta modulation
  • Quantization
  • Signal to noise ratio
  • Speech coding


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