Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1987-05-18
1989-01-24
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 12, 3581711, 358147, H04N 704, H04N 7087, H04N 550
Patent
active
048004260
ABSTRACT:
A system and method are disclosed for transmission and reception of high definition television signals. A standard television signal is transmitted over a first transmission frequency channel, and an enhancement signal, to be used for enhancing the standard signal to obtain a high definition signal, is transmitted over a second transmission frequency channel that is non-adjacent to the first transmission frequency channel. A code signal, which identifies the second transmission frequency channel, is combined into the standard television signal before transmission. The code signal is recovered at the receiver, and used to automatically tune the receiver to also receive the enhancement signal sent over the second transmission frequency channel. A second code signal, representative of other information, such as the portion of the second transmission frequency channel that contains the enhancement information, can also be sent with the standard signal.
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W. E. Glenn, "HDTV Compatible Transmission System", National Association of Broadcasters, Apr., 1986.
W. E. Glenn, "Compatible Terrestrial HDTV Transmission" National Association of Broadcasters, Apr., 1986.
Groody James J.
New York Institute of Technology
Novack Martin M.
Parker Michael D.
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