Television – Television transmitter circuitry
Patent
1992-02-11
1994-07-05
Groody, James J.
Television
Television transmitter circuitry
370123, 333135, H04N 538
Patent
active
053272455
ABSTRACT:
Disclosed is a method and apparatus for combining a plurality of television signal channels which are immediately adjacent in frequency to each other. A main transmission line transmits a plurality of television signals therethrough in a predetermined direction of transmission. The visual signal of a first of the television channels is inserted into the main transmission line in the predetermined direction. The visual signal of a second, immediately adjacent television channel is then inserted into the main transmission line in the predetermined direction, using a frequency band otherwise occupied by the aural signal of the first television channel as a guard band to separate the combined visual signals of the first and second television channels. Each visual signal of the remaining television channels is then sequentially inserted into the main transmission line in the predetermined direction of transmission, using a frequency band otherwise occupied by the aural signal of an immediately adjacent and previously inserted television channel as a guard band to separate the visual signal of each remaining television channel from the previously inserted television channel. The aural signal of the first television channel is then inserted into the main transmission line in the predetermined direction. The aural signal of the second television channel is then inserted into the main transmission line in the predetermined direction. Finally, each aural signal of the remaining television channels is then sequentially inserted into the main transmission line in the predetermined direction of transmission.
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Lynn Jeffrey M.
Unetich Robert M.
Groody James J.
Information Transmission Systems Corp.
Metjahic Safet
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