Disk reproduction apparatus and method for high speed accessing

Details Disk reproduction apparatus and method for high speed accessing Disk reproduction apparatus and method for high speed accessing

1988-08-04

1990-08-14

Richardson, Robert L.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4411, 369 59, 369 57, 360 721, G11B 700

Patent

active

049493230

ABSTRACT:
When receiving address data of a target position from a host computer, a control unit reads the present address data of a pick-up using a subcode Q detector or a header detector. The control unit computes a difference between the present address data as read out and the address data of the preceding frame (one block) already read out and stored in RAM. The control unit then checks if the difference is within a preset value. If it is, the control unit decides that the present address data is correct, and uses it in the data access operation. If it is not, the control unit computes a difference between the address data at the target position as specified by the host computer and the present address. The control unit then checks to see if the difference is within a preset value. If it is, the present address data is correct it is used in the data access operation.

REFERENCES:
patent: 4106058 (1978-08-01), Romeas et al.
patent: 4800549 (1989-01-01), Yamagami et al.

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