Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1987-01-20
1989-03-28
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 500
Patent
active
048171557
ABSTRACT:
Speech analysis is performed by synchronizing, with the initiation of glottal pulses produced during the voicing of phonemes, a pitch-independent transform that performs analysis entirely within a pitch period. Analysis is made of the three most dominant formant frequencies of the sound sets involved in the enunciation of voiced phonemes. Peaks in the transform represent formant frequencies. Three peaks are selected from the transform identifying the frequencies with the first, second and third greatest amplitudes. Correlation of the waveform between successive pitch periods detects whether a sound is a vowel, a voiced sibilant, or unvoiced. Unvoiced sound sets are similarly analyzed but the analysis is synchronized with artificially generated synch pulses. The sound sets are analyzed to determine (1) whether the sound is a vowel, a voiced sibilant or an unvoiced sound; (2) the primary formant frequency, i.e. the one with the greatest amplitude; (3) the substantial presence of secondary and tertiary formant frequencies with the next two largest amplitudes, as well as their frequencies; (4) the frequency ratios of the primary to the secondary and the primary to the tertiary frequencies; (5) the decay rate of at least the greatest formant frequency; and (6) the time relationships of these sound sets to one another and to unvoiced sounds. A unique set of phoneme identifications is derived from these factors. Apparatus using these factors for phoneme encoding and speech reproduction from encoded phonemes is disclosed.
REFERENCES:
patent: 3222898 (1967-05-01), Kalfaran
patent: 4092495 (1978-05-01), Underwood
patent: 4520499 (1985-05-01), Montlick et al.
patent: 4584922 (1986-04-01), Kamiya
patent: 4586193 (1986-04-01), Seiler
Briar Herman P.
Cribbs Robert W.
LandOfFree
Method and apparatus for speech analysis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for speech analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for speech analysis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1666136