ISCA Archive Interspeech 2006
ISCA Archive Interspeech 2006

Two stage transform vector quantization of LSFs for wideband speech coding

Saikat Chatterjee, T. V. Sreenivas

We investigate the use of a two stage transform vector quantizer (TSTVQ) for coding of line spectral frequency (LSF) parameters in wideband speech coding. The first stage quantizer of TSTVQ, provides better matching of source distribution and the second stage quantizer provides additional coding gain through using an individual cluster specific decorrelating transform and variance normalization. Further coding gain is shown to be achieved by exploiting the slow time-varying nature of speech spectra and thus using inter-frame cluster continuity (ICC) property in the first stage of TSTVQ method. The proposed method saves 3-4 bits and reduces the computational complexity by 58-66%, compared to the traditional split vector quantizer (SVQ), but at the expense of 1.5-2.5 times of memory.


doi: 10.21437/Interspeech.2006-65

Cite as: Chatterjee, S., Sreenivas, T.V. (2006) Two stage transform vector quantization of LSFs for wideband speech coding. Proc. Interspeech 2006, paper 1433-Mon1FoP.8, doi: 10.21437/Interspeech.2006-65

@inproceedings{chatterjee06_interspeech,
  author={Saikat Chatterjee and T. V. Sreenivas},
  title={{Two stage transform vector quantization of LSFs for wideband speech coding}},
  year=2006,
  booktitle={Proc. Interspeech 2006},
  pages={paper 1433-Mon1FoP.8},
  doi={10.21437/Interspeech.2006-65},
  issn={2958-1796}
}