Optical disc apparatus

Details Optical disc apparatus Optical disc apparatus

1995-08-22

1996-04-16

Epps, Georgia Y.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 47, 369 59, 369 60, G11B 700

Patent

active

055089895

ABSTRACT:
A disc driving apparatus using SSA (sector slipping algorithm) and LRA (linear replacement algorithm) for defective sectors. This disc driving apparatus is simple in arrangement and can reproduce data at high speed in a simple processing on the basis of attribute data representing whether a defective sector is processed by the SSA or the LRA. This disc driving apparatus includes an optical head for reproducing data recorded in an optical disc, drive controller for controlling operation of the optical head, a memory for temporarily storing reproduced data, a DMA (dynamic memory access) controller for controlling access to the memory, and a system controller for controlling the drive controller and the DMA controller by supplying first and second command signals thereto in response to a main command signal requesting a write or read operation on a series of sectors.

REFERENCES:
patent: 4845696 (1989-07-01), Ohtsuki et al.
patent: 4949326 (1990-08-01), Takagi et al.
patent: 4984230 (1991-01-01), Satoh et al.
patent: 5130969 (1992-07-01), Sako
patent: 5132956 (1992-07-01), Ichikawa
patent: 5202876 (1993-04-01), Takagi et al.
patent: 5270877 (1993-12-01), Fukushima et al.
patent: 5442614 (1995-08-01), Tamegai

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