Time-frequency scrambler

Details Time-frequency scrambler Time-frequency scrambler

1982-11-22

1985-11-05

Cangialosi, Salvatore

Telegraphy

Systems

Printing

179 15R, 178 2204, H04K 104

Patent

active

045515808

ABSTRACT:
Subband signals are formed each corresponding to a portion of an input signal frequency spectrum. The subband signals are partitioned into subband time segments. The subband time segment signals are permuted. The permuted signals are combined to form a scrambled signal.

REFERENCES:
patent: 3773977 (1973-11-01), Guanella
patent: 3970790 (1976-06-01), Guanella
patent: 4068094 (1978-01-01), Schmid et al.
patent: 4099027 (1978-07-01), Whitten
patent: 4149035 (1979-04-01), Frutiger
patent: 4221931 (1980-09-01), Seiler
patent: 4232193 (1980-11-01), Gerard
patent: 4266095 (1981-05-01), McArdle
patent: 4278840 (1981-07-01), Morgan et al.
patent: 4433211 (1984-02-01), McCalmont et al.
patent: 4443660 (1984-04-01), DeLong
Johnston, "A Filter Family Designed for Use in Quadrature Mirror Filter Banks," Proceedings of 1980 International Conference of Acoustics, Speech and Signal Processing, pp. 291-294, Apr. 1980.
MacKinnon, "The Development of Speech Encipherment," The Radio and Electronic Engineer, vol. 50, No. 4, pp. 147-155, Apr. 1980.

Affiliated with

Also associated with

Rating

Time-frequency scrambler does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Time-frequency scrambler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-frequency scrambler will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-296568