Article

A new phase model for sinusoidal transform coding of speech

Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ
IEEE Transactions on Speech and Audio Processing (Impact Factor: 2.29). 10/1998; DOI: 10.1109/89.709675
Source: IEEE Xplore

ABSTRACT A phase modeling algorithm for sinusoidal analysis-synthesis of
speech is presented, where short-time sinusoidal phases are approximated
using a combination of linear prediction, spectral sampling, delay
compensation, and phase correction techniques. The algorithm is
different to phase compensation methods proposed for source-system LPC
in that it has been tailored to sinusoidal representation of speech.
Performance analysis on a large speech data base reveals an improvement
in temporal and spectral signal matching, as well as in the subjective
quality of reconstructed speech. The method can be applied to enhance
phase matching in low bit rate sinusoidal coders, where underlying sine
wave amplitudes are extracted from an all-pole model. Preliminary
subjective results are presented for a 2.4 kb/s sinusoidal coder

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