Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1976-12-16
1978-08-15
Murray, Richard
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 576
Patent
active
041077296
ABSTRACT:
A method of and apparatus for recovering information from a record medium of the type wherein the information is modulated onto a carrier and recorded in one portion of the record medium and the carrier is recorded in another portion of the record medium. The modulated information is reproduced from the record medium while the medium is rotated, and simultaneously, the carrier also is reproduced from the medium. The reproduced modulated information then is demodulated with the reproduced carrier to recover the original signal information. In one embodiment, the recorded information is a composite color television signal and the carrier constitutes the chrominance subcarrier for the color television signal.
Also disclosed is a method and apparatus for recording signal information on a rotatable record medium. A reference signal is provided and is recorded in a circular track on the record medium. Signal information also is provided and is modulated onto the reference signal, the modulated signal information then being recorded in a separate portion of the record medium. In one embodiment, the reference signal upon which the signal information is modulated is the previously recorded reference signal that has been played back from the record medium. The signal information may comprise color video signal components and the reference signal may comprise one or more subcarriers for the color video signal components. Preferably, the color video components which are modulated onto the subcarriers are combined with a luminance signal and recorded as a composite color television signal.
REFERENCES:
patent: 3809804 (1974-05-01), Okuno et al.
patent: 3953881 (1976-04-01), Yanagimachi et al.
Kojima Chiaki
Ohki Hiroshi
Otobe Takashi
Eslinger Lewis H.
Murray Richard
Sinderbrand Alvin
Sony Corporation
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