Extraction of phonemic information

Details Extraction of phonemic information Extraction of phonemic information

1989-10-02

1992-09-22

Shaw, Dale M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 41, 381 48, 36472416, G10L 710

Patent

active

051504138

ABSTRACT:
When subjected to frequency analysis and plotted in a frequency spectral distribution, a voice signal typically includes a monotonously and relatively slowly changing component and a relatively rapidly changing component. For the recognition of voice sound, the relatively rapidly changing component contains phonemic information and thus is more important. In order to extract such a relatively rapidly changing component containing phonemic information from a voice signal, the voice signal is first subjected to frequency analysis to obtain a frequency spectral distribution, which is then sampled from one end to the other and then in the reversed order in timed sequence repetitively to produce a periodic waveform. Then, the thus obtained periodic waveform is filtered to remove the relatively slowly changing component thereby extracting the relatively rapidly changing component.

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Daniel L. Lapedes, McGraw-Hill Dictionary of Physics and Mathematics, 1978 by McGraw-Hill, Inc., p. 453.

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