Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

S. Voran

Abstract: This paper identifies optimum levels of reverse water-filling for codebook-based coding of noise and speech signals. We find that there is little to be gained from optimizing an effective rate parameter. We identify trade-offs between SNR and log-spectral error. We show that the use of a gain factor compares favorably with reverse water-filling in some situations.

Keywords: signal processing; signal-to-noise ratio; speech coding; bit rate; speech enhancement; Density measurement; Distortion measurement; Subspace constraints; Vectors; noise levels

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Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572

For technical information concerning this report, contact:

Stephen D. Voran
Institute for Telecommunication Sciences
(303) 497-3839

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