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Patent Searching and 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.


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