Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1982-03-16
1984-12-04
Kemeny, E. S. Matt
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 100
Patent
active
044868995
ABSTRACT:
There is disclosed a system for the extraction of pole parameter values. The system comprises an autocorrelation value calculating circuit receiving an input voice signal through a time window, for calculating an autocorrelation value V.sub.i (i=0, 1, 2, . . .) of the input voice signal within the time window; a linear prediction coefficient memory circuit for storing linear prediction coefficients (.alpha..sub.1, .alpha..sub.2) corresponding to various pole parameter values; a signal processor for receiving as its input the output value V.sub.i of the autocorrelation value calculating circuit, performing thereon an arithmetic operation according to the following formula using the prediction coefficients (.alpha..sub.1, .alpha..sub.2) supplied by the linear prediction coefficient memory circuit:
REFERENCES:
patent: 3610831 (1971-10-01), Moshier
"Automatic Formant Tracking by a Newton-Raphson Technique", by J. P. Olive, The Journal of the Acoustical Society of America, vol. 50, No. 2, (Part 2), 1971, pp. 661-670.
"Digital Inverse Filtering--A New Tool for Formant Trajectory Estimation", by J. D. Markel, IEEE Transactions on Audio and Electroacoustics, vol. AU-20, No. 2, Jun. 1972, pp. 129-136.
"A Single-Chip Digital Signal Processor for Voiceband Applications", by Yuichi Kawakami et al., 1980 IEEE International Solid-State Circuits Conference.
Kemeny E. S. Matt
Nippon Electric Co. Ltd.
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