A new phase model for sinusoidal transform coding of speech

ArticleinIEEE Transactions on Speech and Audio Processing 6(5):495 - 501 · October 1998with22 Reads
Impact Factor: 2.29 · 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