Semiconductor integrated circuit for signal processing of optica

Details Semiconductor integrated circuit for signal processing of optica Semiconductor integrated circuit for signal processing of optica

1991-09-25

1994-08-02

Young, W. R.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 48, 369 59, 369 54, 369124, G11B 700, G11B 509

Patent

active

053352157

ABSTRACT:
A semiconductor integrated circuit for signal processing of an optical disk of a write-once type has an EFM demodulating circuit for demodulating an EFM-modulated EFM signal read out of the optical disk; an EFM modulating circuit for EFM-modulating data written to the optical disk; an ATIP demodulating circuit for demodulating an ATIP signal read out of the optical disk; a CLV control circuit for outputting a signal for controlling rotation of the optical disk based on the EFM signal or the ATIP signal; a subcord forming arithmetic circuit for extracting a subcord from the EFM signal and performing a CRC operation of the subcord, the subcord forming arithmetic circuit performing the CRC operation with respect to the data written to the optical disk and forming a subcord; a CIRC modulating/demodulating circuit for detecting and correcting an error in CIRC signal from the EFM-demodulated signal and adding a CIRC error correction code to the data written to the optical disk; an interface circuit for outputting and inputting an audio signal or data; and an interface circuit for a system controller for interfacing with a data bus of a processor for the system controller.

REFERENCES:
patent: 4835757 (1989-05-01), Abiko
patent: 4896311 (1990-01-01), Ishihara
patent: 5065388 (1991-11-01), Roth et al.
patent: 5072435 (1991-12-01), Bakx
patent: 5109369 (1992-04-01), Maeda et al.
patent: 5163035 (1992-11-01), Horikiri

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