Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1983-10-05
1986-12-16
Kemeny, E. S. Matt
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 500
Patent
active
046303006
ABSTRACT:
Bandwidth compression of speech signals is done by aliasing the fricativeund signals (4-8 KHz) into the voiced-sound signal band for transmission (0-4 KHz). To minimize distortion, aliasing (foldover) is done only when the fricative band power is more than twice the voice band power.
REFERENCES:
patent: 3914554 (1975-10-01), Seidel
patent: 4255620 (1981-03-01), Harris et al.
patent: 4303803 (1981-12-01), Yatsuzuka
patent: 4360708 (1982-11-01), Taguchi et al.
Everett Stephanie S.
Kang George S.
Thornhill Alexander F.
Ellis William T.
Kemeny E. S. Matt
Sheinbein Sol
United States of America as represented by the Secretary of the
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