Coder and decoder for a system designed to disseminate color tel

Details Coder and decoder for a system designed to disseminate color tel Coder and decoder for a system designed to disseminate color tel

1975-05-16

1978-01-10

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 4, 358 7, H04N 576, H04N 932

Patent

active

040682595

ABSTRACT:
A coder designed to receive color television audio video signals where a carrier wave is frequency modulated by the luminance signal and a sub-carrier wave is modulated by time multiplexed chrominance signal and audio signal; the carrier and the sub-carrier waves are linearly mixed and the resultant signal is converted into a multiplex wave formed by a train of length modulated pulses; the sub-carrier frequency is higher than the highest frequency of the luminance signal and the lowest instantaneous frequency of the carrier minus the highest frequency of the luminance signal is at least equal to the sub-carrier frequency; the multiplex signal may be transmitted and registered on a data carrier; and a decoder adapted for cooperating with the coder, for decoding the multiplex signal coming from the transmission channel or the read out data carrier and delivering the audio video signals.

REFERENCES:
patent: 3440339 (1969-04-01), Johnson
patent: 3730983 (1973-05-01), Numakura et al.
patent: 3825674 (1974-07-01), Justice
patent: 3869706 (1975-03-01), Peltier
patent: 3916092 (1975-10-01), Justice
patent: 3982272 (1976-09-01), Veritoeven et al.

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