Optical disk reproducing device and its seek operation method

Details Optical disk reproducing device and its seek operation method Optical disk reproducing device and its seek operation method

1994-11-29

1996-07-09

Young, W. R.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 50, 369 59, 369 4428, G11B 700

Patent

active

055351832

ABSTRACT:
An optical disk device generating reproduced data based on a reproduced digital signal which is derived by tracking a track on an optical disk with an optical pickup is shown. A bit-frequency-information generation unit measures a bit frequency of the reproduced digital signal after transition of the optical pickup in a seek operation, and generates measured-bit-frequency information which indicates a measured bit frequency measured thereby. In a bit-frequency setting unit, if there is a difference between the measured bit frequency and a specified bit frequency, the measured-bit-frequency information is corrected so as to adjust the bit frequency of the reproduced digital signal to the specified bit frequency by a given amount of correction, and is produced as setting-bit-frequency information. And a PLL circuit generates a synchronization clock which is phase synchronized to the reproduced digital signal and is used for generation of the reproduced data by means of setting the bit frequency indicated by the setting-bit-frequency information to a free-run frequency of the PLL circuit.

REFERENCES:
patent: 4539666 (1985-09-01), Wachi
patent: 4672597 (1987-06-01), Yamazaki
patent: 4885644 (1989-12-01), Ishii et al.
patent: 5109369 (1992-04-01), Maeda et al.
patent: 5157645 (1992-10-01), Takahara et al.

Affiliated with

Also associated with

Rating

Optical disk reproducing device and its seek operation method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disk reproducing device and its seek operation method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk reproducing device and its seek operation method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1873644