Optical recording medium, recording apparatus and method for...

Details Optical recording medium, recording apparatus and method for... Optical recording medium, recording apparatus and method for...

2006-04-25

2006-04-25

Neyzari, Ali (Department: 2656)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S053310, C369S044260

Reexamination Certificate

active

07035198

ABSTRACT:
Audio data of 20 bits is separated into first data of upper 16 bits and second data of lower 4 bits. EFM modulation data is formed from the first data. A laser beam is on/off controlled in correspondence to the logic level of channel data obtained by NRZI modulating a serial data train. The first data, therefore, is recorded in a manner similar to the case of a compact disc. Each pit is controlled so as to have a displacement in the right/left direction for the track center in accordance with the second data and the deviated pit is formed. When data is recorded by the displacement of the pit, since a high frequency component of a tracking error signal changes upon reproduction, the second data can be extracted from the tracking error signal.

REFERENCES:
patent: 6298033 (2001-10-01), Tanoue et al.

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