Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1988-06-06
1989-11-07
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358 12, 358 16, 358 11, H04N 979
Patent
active
048796069
ABSTRACT:
Extended definition television (EDTV) signals including a compatible composite wideband signal and a separate helper or extended definition signal are combined, for example, for recording purposes, using frequency multiplexing techniques. The helper signal is applied to a modulator, which produces a suppressed carrier modulated signal, to frequency shift the helper signal to a spectral band above the frequency band occupied by the compatible composite wideband signal. The frequency shifted and wideband signal are then added to form the combined signal.
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Masami Itoga et al., "Two Channel FM Recording For High-Definition Baseband Signals", IEEE Trans. Consumer Electronics, vol. 34, No. 1, Feb. 88, pp. 78-84.
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Flory Robert E.
Jonnalagadda Krishnamurthy
Walter James M.
General Electric Company
Hayes James B.
Herrmann Eric P.
Shepperd John W.
Tripoli Joseph S.
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