Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1992-08-25
1994-05-24
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Recording apparatus
369116, 369106, H04N 585, G11B 1118
Patent
active
053154029
ABSTRACT:
A video signal recording/reproducing device has at least a frequency modulating unit which FM modulates information to be recorded on an optical disk memory, a laser driving pulse generating unit for generating a laser driving pulse derived from the frequency-modulated signal generated by the frequency modulating unit and for modifying the duty factor of the laser driving pulse in accordance with the linear velocity of the optical disk memory where recording is taking place; and a recording unit for controlling the laser power during recording to an optimum value in accordance with the linear velocity of the optical disk memory where recording is taking place. This arrangement enables reduction of the minimal length of recording bits resulting in reproduced signals of a level sufficient for obtaining reproduced images of a fine quality addition enables increase of the recording capacity of the optical disk memory.
REFERENCES:
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patent: 4243849 (1981-01-01), Goshima et al.
patent: 4796097 (1989-01-01), Mashimo
patent: 4813034 (1989-03-01), Mashimo
patent: 4937809 (1990-06-01), Miyadera et al.
W. van den Bussche et al. --"Signal Processing in the Philips `VLP` System" in Philips Technical Review pp. 182-185 (1973), Rev. 33, No. 7.
Ito Yasuyuki
Kawabe Takeshi
Takase Takeo
Tojo Yukio
Chin Tommy P.
Nguyen Huy
Sharp Kabushiki Kaisha
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