CD-ROM decoder for correcting errors in header data

Details CD-ROM decoder for correcting errors in header data CD-ROM decoder for correcting errors in header data

1995-02-14

1997-04-15

Gordon, Paul P.

Excavating

371 571, 371 572, 371 471, 371 671, 371 511, G06F 1100

Patent

active

056217439

ABSTRACT:
A CD-ROM decoder provides error correction for header data of digital data read out from a ROM disc. Address information contained in the header data of the read out digital data is stored in an address information register 31. An adder 32 adds a value "1" to a value of the address information stored in the register 31. The added value is stored in the final address information register 33 at timing delayed by one frame. A comparison circuit 35 compares the two data stored in the registers 31 and 32, respectively, and detects an error based on lack of coincidence between the two data values. When an error is detected, a selection circuit 34 selects and output address data stored in the final address information register 33.

REFERENCES:
patent: 4669000 (1987-05-01), Odaka et al.
patent: 4719642 (1988-01-01), Lucas
patent: 4794626 (1988-12-01), Tanabe et al.
patent: 4901318 (1990-02-01), Tomisawa
patent: 5381424 (1995-01-01), Tsang

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