Reproduction of optical information by one-beam optics with redu

Details Reproduction of optical information by one-beam optics with redu Reproduction of optical information by one-beam optics with redu

1996-02-14

1998-09-15

Young, W. R.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 54, 369 59, 369 94, 369 95, 3692753, 3692754, G11B 700

Patent

active

058089888

ABSTRACT:
Learning marks are recorded in a learning region preceding a data recording region of the track. The positions of information recording lattice points are staggered by one lattice point between two contiguous tracks. At reading of recorded information, a two-dimensional information leakage amount is detected by the reproduced signals from a learning mark preceding a target information recording lattice point on a track, and from the information recording lattice points immediately before and after the learning mark in question. The equalization coefficients are calculated from leakage amount thus obtained. The crosstalk present in a reproduced signal for the target lattice point is removed by using this equalization coefficients and a pair of reproduced signals from intermediate lattice points which are located immediately before and after the current lattice point and which are not used to record information marks. Inter-symbol interference left in the crosstalk-removed reproduced signal is further removed by use of the reproduced signals from a plurality of information recording lattice points which are located immediately before and after the target lattice point.

REFERENCES:
patent: 5337301 (1994-08-01), Sugiura et al.
patent: 5493552 (1996-02-01), Kobori
patent: 5559786 (1996-09-01), Horimai et al.
patent: 5615193 (1997-03-01), Kobayashi et al.
"High Density Format for Optical Drives", Sperry Optical Storage Products, Sep. 9, 1986, Aug. 1986 SPIE Conference, 86-119, pps.
"Diffraction Theory of Laser Read-Out Systems for Optical Video Discs", H. Hopkins, Department of Physics, University of Reading, Reading, England, Revised Aug. 1978, J. Opt. Soc. Am., vol. 69, No. 1, Jan. 1979, pp. 4-24.
ANSI Document No. X3B11/90-003-R1, pp. 50-60.

Affiliated with

Also associated with

Rating

Reproduction of optical information by one-beam optics with redu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reproduction of optical information by one-beam optics with redu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reproduction of optical information by one-beam optics with redu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-95874