Computational effectiveness enhancement of frequency domain...

Details Computational effectiveness enhancement of frequency domain... Computational effectiveness enhancement of frequency domain...

2007-09-18

2007-09-18

Hudspeth, David (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S207000, C704S208000

Reexamination Certificate

active

10373260

ABSTRACT:
Estimating a speech signal pitch frequency by determining a speech signal frame line spectrum including spectral lines having respective line amplitudes and frequencies, selecting a predefined number of spectral lines having highest amplitudes, fewer then the total number of the spectral lines, calculating a preliminary utility function over a pitch frequency range to provide a preliminary utility function value for each pitch frequency in the range measuring the compatibility of the selected spectral lines with the pitch frequency, identifying a predefined number of preliminary pitch frequency candidates at least partly responsive to the preliminary utility function, where each candidate is a local maximum of the preliminary utility function, calculating a final utility score for each of the candidates, and selecting any of the candidates to be an estimated pitch frequency of the speech signal at least partly responsive to any of the final utility scores.

REFERENCES:
patent: 4384335 (1983-05-01), Duifhuis et al.
patent: 4791671 (1988-12-01), Willems
patent: 6587816 (2003-07-01), Chazen et al.
patent: 6876953 (2005-04-01), Fisher
patent: 2003/0125934 (2003-07-01), Chen et al.
patent: 2003/0171917 (2003-09-01), Zhu et al.

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