Optical information storing device, data processing circuit and information storage medium
AssigneeFujitsu Limited
InventorsShigenori Yanagi, Hiroshi Tani, Tetsuya Tsuji
Life of this patent
Estimating the term…
Abstract
The present invention aims at providing an inexpensive optical information storing device that produces reduced cross talk. An optical information storing device has a cyclic data output circuit 14—1 that outputs cyclic data in which values are repeated every 5 bytes, and an EXOR circuit 14—2 that calculates the exclusive-OR (EXOR) of recording data input thereto via a buffer 14—5 and the cyclic data and inputs the calculation result to an RLL modulation circuit 14—3 as data to be recorded.
Claims19
An optical information storing device, comprising:
- a data recording section that receives arbitrary recording data and records the recording data in a predetermined information storage medium in the form of optically-readable marks;
- a cyclic data output section that outputs predetermined cyclic data in which values are repeated every N bytes (N being an integer larger than 3, except for multiples of 3);
- and
- a logic operation section that receives the cyclic data output from the cyclic data output section and arbitrary original data, performs a predetermined logic operation on the cyclic data and the original data and inputs data resulting from the logic operation to the data recording section as the recording data.
An optical information storing device, comprising:
- a data reading section that reads data recorded in a predetermined information storage medium in the form of optically-readable marks;
- a cyclic data output section that outputs predetermined cyclic data in which values are repeated. every N bytes (N being an integer larger than 3, except for multiples of 3);
- and
- an inverse operation section that performs an inverse operation of a predetermined logic operation on the data read by the data reading section and the cyclic data output from the cyclic data output section and outputs data resulting from the inverse operation.
A data processing circuit that is incorporated in an optical information storing device and performs data processing, the optical information storing device having a data recording section that receives arbitrary recording data and records the recording data in a predetermined information storage medium in the form of optically-readable marks, the data processing circuit comprising:
- a cyclic data output section that outputs predetermined cyclic data in which values are repeated every N bytes (N being an integer larger than 3, except for multiples of 3);
- and
- a logic operation section that receives the cyclic data output from the cyclic data output section and arbitrary original data, performs a predetermined logic operation on the cyclic data and the original data and inputs data resulting from the logic operation to the data recording section as the recording data.
A data processing circuit that is incorporated in an optical information storing device and performs data processing, the optical information storing device having a data reading section that reads data recorded in a predetermined information storage medium in the form of optically-readable marks, the data processing circuit comprising:
- a cyclic data output section that outputs predetermined cyclic data in which values are repeated every N bytes (N being an integer larger than 3, except for multiples of 3);
- and
- an inverse operation section that performs an inverse operation of a predetermined logic operation on the data read by the data reading section and the cyclic data output from the cyclic data output section and outputs data resulting from the inverse operation.
An information storage medium in which information is recorded therein in the form of optically-readable marks, wherein data resulting from a predetermined logic operation performed on digital data representing the information and predetermined cyclic data in which values are repeated every N bytes (N being an integer larger than 3, except for multiples of 3) is converted into a mark and recorded.
Dependencies are inferred from the claim text.