Television captioning system

Details Television captioning system Television captioning system

1979-08-24

1982-01-12

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 704

Patent

active

043108547

ABSTRACT:
Captioning of television presentations is achieved by transmitting digital data superimposed on the normal FM sound signal by modulation of an ultrasonic subcarrier and receiving the digital data at a viewer's television receiver by picking up the ultrasonic signal from the television receiver's loudspeaker; the received digital data being demodulated and applied to the television receiver as readable alphanumeric captions.

REFERENCES:
patent: 3046329 (1962-07-01), Reesor
patent: 3221098 (1965-11-01), Feldman et al.
patent: 3412205 (1968-11-01), Saeger
patent: 3581011 (1971-05-01), Ward et al.
patent: 3632863 (1972-01-01), Hirashima
patent: 3816658 (1974-06-01), Vidovic
Radio Shack Dictionary of Electronics, 1974-1975 edition pp. 575 and 630.
Mohanty, "Simultaneous Transmission of Two Languages on Television", J. Instn. Telecom. Engrs. vol. 18, No. 7, 1972, pp. 313-319.
Heathkit Color TV Model GR-581, Photofact, vol. 138, Set 1373, Howard W. Sams & Co, 1975.

Affiliated with

Also associated with

Rating

Television captioning system does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1543754