Voice band data rate detector

Details Voice band data rate detector Voice band data rate detector

1988-09-28

1990-03-27

Clark, David L.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 912

Patent

active

049127659

ABSTRACT:
An apparatus for detecting the modulation rate of voice-band data signals. The detector determines the level occupancy L.sub.p, the partial entropy E.sub.p, and the zero-crossing count N.sub.zc for the input signal and compares these values with threshold values to determine the data rate.

REFERENCES:
patent: 3878334 (1975-04-01), Halpern
patent: 4052558 (1977-10-01), Patterson
patent: 4330689 (1982-05-01), Kang et al.
patent: 4457013 (1984-06-01), Castellino et al.
patent: 4556866 (1985-12-01), Gorecki
patent: 4663623 (1987-05-01), Lax et al.
patent: 4756007 (1988-07-01), Qureshi et al.
Shwartz, "Information Transmission, Modulation, and Noise" McGraw-Hill, 1959, pp. 1-14.

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