Multipulse LPC speech processing arrangement

Details Multipulse LPC speech processing arrangement Multipulse LPC speech processing arrangement

1984-03-16

1987-10-20

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 500

Patent

active

047019549

ABSTRACT:
A multipulse-code approximation of of one frame of a predictive residual signal may lose the frame-to-frame redundancy. Accordingly, pitch redundancy removal during the iterative process of forming the multipulse sequence, rather than frame-to-frame code comparison, provides reduction of excitation signal bit rate, substantially independent of voice pitch. A speech pattern predictive coding arrangement includes forming a prescribed format multipulse excitation signal for each successive time frame of the pattern. The multipulse excitation signal corresponds to the frame predictive residual. The redundancy in the multipulse excitation signal is reduced by forming a signal representative of the similarities between the current frame speech pattern and the speech pattern of preceding frames and removing such similarities from the multipulse excitation signal. Advantageously, the bit rate of the multipulse excitation signal is reduced and the excitation signal is rendered substantially independent of voice pitch.

REFERENCES:
patent: 3582546 (1969-06-01), Brown
patent: 3624302 (1971-11-01), Atal
patent: 3631520 (1971-12-01), Atal
patent: 3750024 (1973-07-01), Dann et al.
patent: 4022974 (1977-05-01), Kohut et al.
patent: 4130729 (1978-12-01), Gagnon
patent: 4133976 (1979-01-01), Atal
patent: 4304964 (1981-12-01), Wiggins, Jr. et al.
patent: 4472832 (1984-09-01), Atal et al.
"A New Model of LPC Excitation for Producing Natural-Sounding Speech at Low Bit Rates", Proceedings of the International Conference on Acoustics Speech and Signal Processing, B. S. Atal and J. R. Remde, 1982, pp. 614-617.
Kortman, C. M., "Redundancy Reduction--A Practical Method of Data Compression", Proceedings of the IEEE, vol. 55, No. 3, Mar. 1967.

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