Title:
MODULATION DEVICE AND METHOD, DEMODULATION DEVICE AND METHOD AND PROVIDING MEDIUM
Document Type and Number:
Japanese Patent JP3870573
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To supply a sure synchronizing signal pattern by adding synchronizing signals provided with a pattern for breaking a maximum run following a minimum run.
SOLUTION: A DSV bit decision/insertion part 11 performs DSV control on a data string at an optional interval, decides the '1' or '0' of a DSV control bit, inserts it at the optional interval and supplies the data string to a modulation part 12 and a SYNC/SYNCID decision part 13. The modulation part 12 modulates the data stream into which the DSV control bit is inserted and the SYNC/SYNCID decision part 13 decides the pattern of the synchronizing signals and supplies them respectively to a SYNC bit insertion part 14. The SYNC bit insertion part 14 inserts the synchronizing signals decided by the SYNC/ SYNCID decision part 13 into a code stream inputted form the modulation part 12 and supplies them to a Non-Return-to-Zero inversion (NRZI) part 15, the code stream is NRZI-modulated and converted to a recording waveform and a recording waveform sequence is outputted.
Inventors:
Toshiyuki Nakagawa
Shinfuku Yoshihide
Tatsuya Narahara
Shinfuku Yoshihide
Tatsuya Narahara
Application Number:
JP23704498A
Publication Date:
January 17, 2007
Filing Date:
August 24, 1998
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H03M7/14; H03M5/14; H04L7/04; G11B20/14; H04L7/00; (IPC1-7): H03M7/14
Domestic Patent References:
| JP9162857A | ||||
| JP11346154A | ||||
| JP2000011551A | ||||
| JP2000068847A | ||||
| JP2000068848A |
Attorney, Agent or Firm:
Yoshio Inamoto