Signal reproducing circuitry and signal reproducing method for o

Details Signal reproducing circuitry and signal reproducing method for o Signal reproducing circuitry and signal reproducing method for o

1989-03-10

1991-12-17

Psitos, Aristotelis

Dynamic information storage or retrieval

Signal processing by storage and subsequent retrieval

369107, H01G 420, H04J 300

Patent

active

050738860

ABSTRACT:
Provided is a signal reproducing circuit for an optical disc player including a multidivisional photodetector with photoelectric converting elements in a preceding side and photoelectric converting elements in a succeeding side relative to a proceeding direction of pits of an optical disc, a variable delay circuit for delaying outputs from the photoelectric converting elements in the preceding side, a circuit for detecting a time difference between an output from the photo electric converting elements in the succeeding side and an output from the variable delay circuit, and a circuit responsive to an output from the time difference detecting circuit for changing a delay time of the variable delaying circuit. The signal reproducing circuit further includes a circuit for amplifying and correcting high frequency components of signals reproduced by the photo detector in response to the output from the time difference detecting circuit. This structure extends a reproduced frequency band, improves a high frequency characteristic of the video signals reproduced from the optical disc and supplies video signals having superior frequency characteristics.

REFERENCES:
patent: 4366564 (1982-12-01), de Haan et al.
patent: 4726004 (1988-02-01), Takasago et al.
patent: 4785441 (1988-11-01), Tanaka et al.
patent: 4845701 (1988-07-01), Nakata
"Laser Disc Technical Book", by Pioneer Kabushiki Kaisha, Kabushiki Kaisha ASCII, Nov. 1, 1986.

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