Browse Prior Art Database

Three Dimensional Speech Spectrogram with Indication of Voicing

IP.com Disclosure Number: IPCOM000107346D
Original Publication Date: 1992-Feb-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 1 page(s) / 34K

Publishing Venue

IBM

Related People

Destombes, F: AUTHOR

Abstract

The device disclosed here allows representing a speech utterance as a three-dimensional spectrogram (intensity vs. frequency vs. time) together with an indication of the presence or absence of voicing. This is different from conventional three-dimensional (3-D) spectral representations, which do not show voicing.

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Three Dimensional Speech Spectrogram with Indication of Voicing

       The device disclosed here allows representing a speech
utterance as a three-dimensional spectrogram (intensity vs. frequency
vs. time) together with an indication of the presence or absence of
voicing. This is different from conventional three-dimensional (3-D)
spectral representations, which do not show voicing.

      The device consists of:
1.   A microphone and a loudspeaker.
2.   An acoustic component to determine voicing and the frequency
spectrum.
3.   A color display screen. '4.   A control mechanism to coordinate
the device operation.

      When the user pronounces speech sounds, they are captured by
the microphone and analyzed by the acoustic component, which delivers
a voicing indication (yes-no) and a frequency spectrum at regular
short intervals. The control mechanism uses these results to display
a 3-D spectrogram on the display screen, using two different colors
to draw the outline of individual spectra depending on voicing. It
also offers a playback function through the loudspeaker to allow
listening again to the speech utterance, while a cursor is displayed
along the spectra, synchronized with speech. The control mechanism
allows splitting the display in two parts and displaying on either
part, so as to allow comparison between two spectrograms
corresponding to two utterances.

      Possible applications of this device include speech therapy,
where the speech t...