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    Saturday, November 05, 2005

    Frames/Blocks Processing

    The LPC spectral analysis which has been discussed in the previous post section can be used to analyse the spectrum of each frame. Figure below illustrates the LPC spectra of a speech signal from frame 48 to frame 63.


    This segment of speech signal by a male speaker is the voiced region, which corresponds to the diphthong “ay” in digit “five”. A few characteristics can be found from the graph. Firstly, the locations of three formants for all frames are almost the same. Secondly, the amplitudes of the first formant of all frames are respectively high (Compare to unvoiced frames shown below).

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