Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1977-10-14
1980-12-30
Cardillo, Jr., Raymond F.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 576
Patent
active
042426995
ABSTRACT:
A recording and reproducing apparatus for color video signals, in which before the color video signal is recorded, the chroma signal of the color video signal is frequency-converted by a carrier from an oscillator whose frequency is f.sub.a =[(455/2)+{(2n+1)/4}]f.sub.H so that the chroma signal is compressed to a very low frequency band with the sidebands of the chroma signal being interleaved with each other. The thus compressed signal is frequency-modulated and recorded, and is then reproduced and demodulated. The demodulated signal is balance-modulated and passed through a comb-filter to reproduce the chroma signal. Since the chroma signal is frequency-modulated before the recording, possible fluctuation of the signal level due to the recording and reproducing means does not affect the resulting reproduced chroma signal. Also, since the chroma signal is compressed to a very low frequency band, a time base error (jitters) which might possibly occur in the resulting reproduced chroma signal due e.g. to a fluctuation of the mechanical operation, such as magnetic tape movement, of the recording and reproducing means can be minimized.
REFERENCES:
patent: 3715468 (1973-02-01), Fujita
patent: 3730983 (1973-05-01), Numakura et al.
patent: 3757034 (1973-09-01), Fujita
patent: 3939485 (1976-02-01), Amari et al.
patent: 4007482 (1977-02-01), Amari
patent: 4007484 (1977-02-01), Amari
patent: 4012771 (1977-03-01), Ishigaki et al.
Color Television Standards: Fink, McGraw-Hill, 1955, p. 57.
Television Simplified: Kiver & Kaufman, Van Nostrand Reinhold Company (1974 in Group), Figs. 21-29.
Encyclopedia of Science & Technology, vol. 3, McGraw-Hill, 1971, p. 317.
Fujisawa Kiyoji
Kobayashi Masa-aki
Cardillo, Jr. Raymond F.
Matsushita Electric - Industrial Co., Ltd.
Psitos Aristotelis M.
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