Video disc recording and playback system with two recording area

Details Video disc recording and playback system with two recording area Video disc recording and playback system with two recording area

1995-09-20

1997-08-12

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 48, 369 4437, 369107, 3692753, 360 27, 360 64, 386 40, 386 88, 386 37, 386126, H04N 584, G11B 2012

Patent

active

056573090

ABSTRACT:
A disc recording device for recording a first information signal and a second information signal, e.g. a pilot signal, on a disc-shaped recording medium comprises an optical pick-up having first and second laser diodes for recording the first and second information signals on the disc-shaped recording medium, a first modulator for modulating the first information signal at a first frequency, a first laser diode modulator for driving the first laser diode based on a signal outputted from the first modulator, a generator for generating the second information signal of a second frequency and a second laser diode modulator for driving the second laser diode based on the second information signal.

REFERENCES:
patent: 5012351 (1991-04-01), Isono et al.
patent: 5166806 (1992-11-01), Ebisawa et al.
patent: 5233437 (1993-08-01), Tachibana et al.
patent: 5442455 (1995-08-01), Hioki et al.
patent: 5448539 (1995-09-01), Kamioka
patent: 5485441 (1996-01-01), Maeda
IEEE Transactions on Consumer Electronics, vol. 35, No. 3/Aug. 1989 Optical Disc System for Wideband High Definition Video Signal by Kaoru Tachibana et al.
Patent Abstracts of Japan, vol. 013, No. 364 (E-805), 14 Aug. 1989 & JPA-A-01 120974 (Sanyo Electric Co. Ltd) 12 May 1989.
Patent Abstracts of Japan, vol. 014, No. 128 (P-1019), 9 Mar. 1990 & JP-A-01 320645 (Matsushita Electric Ind Co Ltd), 26 Dec. 1989.
Patent Abstracts of Japan, vol. 013, No. 383 (E-811), 24 Aug. 1989 & JP-A-01 132283 (Sanyo Electric Co Ltd) 24 May 1989.

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