ISCA Archive Eurospeech 1999
ISCA Archive Eurospeech 1999

Low bit-rate speech coding using quantization of variable length segments

R. Mayrench, D. Malah

This paper describes a new segmentation and quantization technique for low bit-rate speech coders. Bit-rate reduction is achieved by combining segmentation and quantization, where a segment consists of one or more adjacent frames. The algorithm for selecting and quantizing segments from a pre-determined number of frames extends the frame-based trellis techniques. It models the input speech as a sequence of variable length segments with the option to interpolate frames in skipped segments. The new algorithm, denoted as Trellis Segmentation-Quantization (TSQ), reduces the bit-rate needed for spectral envelope representation, with only a small degradation in log-spectral distance values. Experimental results show that TSQ achieves a lower spectral distance than alternate frame transmission, matrix quantization and trellis based frame selection and interpolation.


doi: 10.21437/Eurospeech.1999-331

Cite as: Mayrench, R., Malah, D. (1999) Low bit-rate speech coding using quantization of variable length segments. Proc. 6th European Conference on Speech Communication and Technology (Eurospeech 1999), 1459-1462, doi: 10.21437/Eurospeech.1999-331

@inproceedings{mayrench99_eurospeech,
  author={R. Mayrench and D. Malah},
  title={{Low bit-rate speech coding using quantization of variable length segments}},
  year=1999,
  booktitle={Proc. 6th European Conference on Speech Communication and Technology (Eurospeech 1999)},
  pages={1459--1462},
  doi={10.21437/Eurospeech.1999-331}
}