System and method for inserting and recovering an on data signal

Television – Format – Including additional information

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348486, H04N 7081

Patent

active

057398666

ABSTRACT:
A system and method for modulating a data signal uses a phase shifting transformer function to phase shift the lower and upper sidebands of the data signal so that the sidebands of the data signal have a 180.degree. phase shift with respect to each other (i.e., are complementary). The phase shifted sidebands are added to a standard video signal and then transmitted. A television or other video receiver demodulates the video signal with a simple demodulator circuit, which causes the upper and lower sidebands to be summed together. The data signal, with complementary sidebands, cancels out so that the data signal does not interfere with normal video operation. The upper and lower sidebands of the data signal are processed separately from the video processing circuitry of the television receiver. An inverse phase shifting circuit performs a second phase shift operation on the upper and lower sidebands of the data signal so that the data signal can be demodulated and the data signal recovered.

REFERENCES:
patent: 3084329 (1963-04-01), Clay
patent: 3842196 (1974-10-01), Loughlin
patent: 3924060 (1975-12-01), Bedford
patent: 4660072 (1987-04-01), Fukinuki
patent: 4686705 (1987-08-01), Smith
patent: 4745460 (1988-05-01), Fukinuki
patent: 4821101 (1989-04-01), Short
patent: 4839743 (1989-06-01), Best et al.
patent: 4847690 (1989-07-01), Perkins
patent: 4849817 (1989-07-01), Short
patent: 4855827 (1989-08-01), Best
patent: 4885631 (1989-12-01), Fukinuki et al.
patent: 4943848 (1990-07-01), Fukinuki
patent: 4945225 (1990-07-01), Gamgee et al.
patent: 4945402 (1990-07-01), Fukinuki
patent: 4955072 (1990-09-01), Tomljenovic
patent: 5063446 (1991-11-01), Gibson
patent: 5200715 (1993-04-01), Gerdes et al.
patent: 5200822 (1993-04-01), Bronfin et al.
patent: 5596361 (1997-01-01), Martinez
patent: 5621471 (1997-04-01), Kim et al.
Luebke, C., "New wave in data communications may start here," The Business Journal, Oct. 26, 1992.
"Now, Data Can Hitchhike On TV Signals," Business Week, Dec. 7, 1992.
"Mixed signals," USA Today Money, Jan. 13, 1993.
"New Transmission System Piggybacks Signals," Interactive World, Feb. 1993.
Jungo, C., "Transmitting hidden data in video signals," Broadcast Engineering, Feb. 1993.
"WavePhore Develops High Speed Data Modem for Television,"TV TechCheck, Feb. 22, 1993.
"Modem Piggybacks TV Signal," EDP Weekly 34(13), Mar. 29, 1993.
"WavePhore Enables Broadcasters to Participate In `Information Superhighway`," Press release from WavePhore, Inc. Apr. 19, 1993.
"Technology Offers TV Broadcasters An Avenue Into Interactive Services," Investor's Business Daily 10(6), Apr. 19, 1993.
"New System Delivers Interactive Video, Data Services Through Existing TV Signals," CE Network News, Apr. 1993.
Wynn, J., "The Technology Boom Beckons Investors," Today'Investor 13(5), May, 1993.

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