Voicing-Based Classified Split Vector Quantizer for Efficient Coding of AMR-WB ISF Parameters

Modern speech coders necessitate efficient coding of the linear predictive coding (LPC) coefficients. Line spectral Frequencies (LSF) and Immittance Spectral Frequencies (ISF) parameters are currently the most efficient choices of transmission parameters for the LPC coefficients. In this paper, we present a voicing-based classified split vector quantization scheme developed for efficient coding of wideband AMR-WB G.722.2 ISF (Immittance Spectral Frequencies) parameters under noiseless channel conditions. It was designed based on the classified vector quantization (CVQ) structure combined with the split vector quantization (SVQ). Simulation results will show that the new ISF coding scheme, called ISF-CSVQ coder, performs better than the conventional non classified ISF-SVQ, while saving several bits per frame.

[1]  Roch Lefebvre,et al.  The adaptive multirate wideband speech codec (AMR-WB) , 2002, IEEE Trans. Speech Audio Process..

[2]  Yuval Bistritz,et al.  Immittance spectral pairs (ISP) for speech encoding , 1993, 1993 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[3]  Cheraitia Salah-Eddine,et al.  Robust coding of wideband speech immittance spectral frequencies , 2014 .

[4]  Allen Gersho,et al.  Vector quantization and signal compression , 1991, The Kluwer international series in engineering and computer science.

[5]  L. Hanzo,et al.  Speech spectral quantizers for wideband speech coding , 2001, Eur. Trans. Telecommun..

[6]  Bachir Boudraa,et al.  Optimized trellis coded vector quantization of LSF parameters, application to the 4.8kbps FS1016 speech coder , 2005, Signal Process..

[7]  Juin-Hwey Chen,et al.  Transform predictive coding of wideband speech signals , 1996, 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings.

[9]  Arne Leijon,et al.  Vector quantization of LSF parameters with a mixture of dirichlet distributions , 2013, IEEE Transactions on Audio, Speech, and Language Processing.

[10]  Allen Gersho,et al.  Voicing-specific LPC quantization for variable-rate speech coding , 1999, IEEE Trans. Speech Audio Process..

[11]  Kuldip K. Paliwal,et al.  Efficient product code vector quantisation using the switched split vector quantiser , 2007, Digit. Signal Process..

[12]  Choong Woong Lee,et al.  A classified split vector quantization of LFS parameters , 1997, Signal Process..

[13]  Kuldip K. Paliwal,et al.  Efficient vector quantization of LPC parameters at 24 bits/frame , 1993, IEEE Trans. Speech Audio Process..