Robust speech mode based LSF vector quantization for low bit rate coders

@inproceedings{Nandkumar1998RobustSM,
  title={Robust speech mode based LSF vector quantization for low bit rate coders},
  author={Srinivas Nandkumar and Kumar Swaminathan and Udaya Bhaskar},
  booktitle={ICASSP},
  year={1998}
}
Robust vector quantization of LSF parameters at a low bit rate is essential for voice coders operating below 5 Kbps. A novel aspect of the proposed technique is the use of decorrelated residual LSF vectors from speech mode based backward prediction along with a multi-stage VQ design. Rates as low as 12 bits per 20 ms speech frame for the stationary voiced speech mode and 22 bits/frame for unvoiced and non-stationary voiced frames are shown to result in efficient quantization. In our… CONTINUE READING

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New Speech Encoding Algorithms for Ultra Low Bit Rate at 600/300 Bps

2006 IEEE International Conference on Acoustics Speech and Signal Processing Proceedings • 2006
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Efficient vector quantization of LPC parameters at 24 bits/frame

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Highly Influenced

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A Robust Low Rate Voice Codec For Wireless Communications

U. Bhaskar
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