Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1987-06-08
1988-12-27
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 11, 358 12, 358140, H04N 701, H04N 704
Patent
active
047944560
ABSTRACT:
A method and apparatus for transmitting a high-definition television signal containing picture information which, on display, forms first picture frames at a rate of 2n frames per second, where n is a standard number of picture frames per second formed by the picture information in a standard television signal, and having a width which is wider than that of a standard aspect ratio picture frame, said high-definition television signal having a bandwidth greater that that of a standard television signal, each of said first picture frames including a single field having m sequentially scanned scanning lines, where m is a standard number of interlaced scanning lines in each picture frame formed by the picture information in said standard television signal, in which said scanning lines are arranged in two interlaced fields. The method includes converting the high-definition television signal into a first transmission signal compatible with a standard television receiver and a second transmission signal to be combined with the first transmission signal in a high-definition televison receiver, to recreate the high-definition television signal.
REFERENCES:
patent: 4567508 (1986-01-01), Hulyer
patent: 4605950 (1986-08-01), Goldberg et al.
Gadson Gregory P.
Groody James J.
North American Philips Corporation
Parker Michael D.
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