Detecting transients to emphasize formant peaks

Details Detecting transients to emphasize formant peaks Detecting transients to emphasize formant peaks

1997-09-23

1999-09-14

Knepper, David D.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704224, G10L 902

Patent

active

059536969

ABSTRACT:
Nasalized sound effects during reproduction of low-pitch sounds are suppressed to produce playback sounds of high clarity. Amplitude data is processed with high range formant emphasis of crests and valleys of the envelope of the frequency spectrum on the high frequency range and with deepening of the valley of the frequency spectrum over the entire frequency range, above all, over the low to mid frequency range. Next, the amplitude data is processed for emphasizing the peak values of the formant of the voiced frame in the portion of the speech signal which is rising in magnitude and for unconditionally emphasizing the spectral envelope on the high frequency range. The voiced speech spectrum is generated by synthesizing the cosine wave based upon the emphasized amplitude data.

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