RECORDING CODE CONVERTING DEVICE, RECORDING AND ENCODING SYSTEM THEREFOR, AND RECORDING MEDIUM RECORDED WITH RECORD-ENCODED DATA

Title:

RECORDING CODE CONVERTING DEVICE, RECORDING AND ENCODING SYSTEM THEREFOR, AND RECORDING MEDIUM RECORDED WITH RECORD-ENCODED DATA

Document Type and Number:

Japanese Patent JP3348674

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a recording code capable of reducing a maximum inverting interval and decreasing a DC component by performing non-return-to-zero(NRZ) recording by converting 16 bits to 24 bits.
SOLUTION: Four kinds of tables P, Q, R and S incorporated with a ROM 2 for 16-24 modulation have the number of continuous bits in the same code of 2 to 8 bits and the same characteristics as codes 1 and 7. In order to stably lock a phase locked loop(PLL), the total number of data having the number of continuous bits for 2 bits is made to less than (i) bits among 24 bits. A comparative selector circuit selects the optimum table out of four kinds of tables P, Q, R and S.

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Inventors:

Satoshi Itoi

Application Number:

JP6248699A

Publication Date:

November 20, 2002

Filing Date:

March 10, 1999

Export Citation:

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Assignee:

NEC

International Classes:

G11B20/14; H03M7/14; H04L25/34; H04L25/49; (IPC1-7): G11B20/14; H03M7/14

Domestic Patent References:

JP9275347A

Attorney, Agent or Firm:

▲柳▼川信

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