Browse Prior Art Database

Color Coded Spectrograms for Speech Visualization

IP.com Disclosure Number: IPCOM000110692D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 1 page(s) / 46K

Publishing Venue

IBM

Related People

Boyer, L: AUTHOR [+2]

Abstract

Described is a hardware implementation that provides a visually attractive, easily readable display of voicing in a display of color-coded speech spectrograms. The visualization emphasizes the segment of the speech into periods of silence, unvoiced phonemes and voiced phonemes. In prior art, speech spectrograms were displayed using a grey scale where the darker the point, the highest the energy in that frequency band for this short term spectrum. Information, such as pitch contour, was usually displayed on a separate scale that was time aligned with the spectrogram. However, separate displays of information were hard to visually correlate with one another. The concept described herein graphically combines the indication of voicing in a voice spectrogram display.

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Color Coded Spectrograms for Speech Visualization

      Described is a hardware implementation that provides a visually
attractive, easily readable display of voicing in a display of
color-coded speech spectrograms.  The visualization emphasizes the
segment of the speech into periods of silence, unvoiced phonemes and
voiced phonemes.
In prior art, speech spectrograms were displayed using a grey scale
where the darker the point, the highest the energy in that frequency
band for this short term spectrum.  Information, such as pitch
contour, was usually displayed on a separate scale that was time
aligned with the spectrogram.  However, separate displays of
information were hard to visually correlate with one another.
The concept described herein graphically combines the indication of
voicing in a voice spectrogram display.  The presence or absence of
the voicing indication with each time slice of the spectrogram is
used such that the two pieces of information can be synergistically
read at the same time.  Voicing indication is used to drive the color
in which the corresponding spectrum is displayed.  The voicing
selects one of three palettes.  Each palette is a set of colors with
a consistent hue, but with varying degrees of brightness, similar to
how the grey scale palette displays greys from dark to light.
An example of the concept would be a spectrum of silence displayed in
greys; a spectrum of a voiced segment would be displayed in reds; and
a spectrum of an unv...