TW200518061A - Code modulating method and code modulating apparatus, demodulating method and demodulating apparatus, and information recording medium - Google Patents

Code modulating method and code modulating apparatus, demodulating method and demodulating apparatus, and information recording medium

Info

Publication number
TW200518061A
TW200518061A TW092137294A TW92137294A TW200518061A TW 200518061 A TW200518061 A TW 200518061A TW 092137294 A TW092137294 A TW 092137294A TW 92137294 A TW92137294 A TW 92137294A TW 200518061 A TW200518061 A TW 200518061A
Authority
TW
Taiwan
Prior art keywords
code modulating
demodulating
bit train
channel
train
Prior art date
Application number
TW092137294A
Other languages
Chinese (zh)
Inventor
Kinji Kayanuma
Toshiaki Iwanaga
Chosaku Noda
Original Assignee
Nec Corp
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2003399434A external-priority patent/JP3957679B2/en
Application filed by Nec Corp, Toshiba Corp filed Critical Nec Corp
Publication of TW200518061A publication Critical patent/TW200518061A/en

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

In a code modulating method and a code modulating apparatus, a run length has an encoding rate of 2/3 which is equal to that of (1, 7) modulation, and indicates the number of "0" bits between adjacent ones of "1" bits in the channel bit train. A data bit train is converted into the channel bit train so that the run length has a minimum value 1 and a maximum value 10. Further, upon converting any data bit train, the channel bit train does not include a pattern "1010101010101" in which the run length 1 is continuously repeated six times or more. The channel bit train has a DSV (digital sum value) control bit which selects the "0" bit or "1" bit in accordance with a DSV. The channel bit train obtained by using random data for the data bit train is NRZI converted into a signal. A frequency component of the signal is reduced from a maximum value of the frequency component by 20 dB or less as a power density at a frequency of 1/10,000 or less of a channel clock frequency.
TW092137294A 2003-11-28 2003-12-29 Code modulating method and code modulating apparatus, demodulating method and demodulating apparatus, and information recording medium TW200518061A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003399434A JP3957679B2 (en) 2002-12-18 2003-11-28 Coded modulation method and modulation device, demodulation method and demodulation device, information recording medium

Publications (1)

Publication Number Publication Date
TW200518061A true TW200518061A (en) 2005-06-01

Family

ID=57799125

Family Applications (1)

Application Number Title Priority Date Filing Date
TW092137294A TW200518061A (en) 2003-11-28 2003-12-29 Code modulating method and code modulating apparatus, demodulating method and demodulating apparatus, and information recording medium

Country Status (1)

Country Link
TW (1) TW200518061A (en)

Similar Documents

Publication Publication Date Title
EP1431972A3 (en) Code modulating method and code modulating apparatus, demodulating method and demodulating apparatus, and information recording medium
US4501000A (en) Method of coding binary data
EP0554638A2 (en) Method and apparatus for implementing PRML codes with maximum ones
MY131577A (en) Modulation apparatus /method, demodulation apparatus/method and program presenting medium
PL319407A1 (en) Method of converting a number of m-bit information words into modulated signal, method of making a record carrier medium, encoding device, decoding device, recording device, reading out device, signal as well as record carrier medium
US7119721B2 (en) Converting information words into different length code words depending on a property of a code signal
JPS5748848A (en) Binary code converting method, coder, decoder and recording medium
US6829306B2 (en) Method and apparatus of converting a series of data words into a modulated signal
EP0058081A2 (en) Methods and apparatus for encoding binary data
US4988999A (en) Digital modulation method
US6778105B2 (en) Method of modulating series of data words into constrained sequence
TW200518061A (en) Code modulating method and code modulating apparatus, demodulating method and demodulating apparatus, and information recording medium
CA2185372A1 (en) Method and Apparatus for Generating High Rate Codes For Recording Information on a Magnetic Medium
JP2004518241A (en) Method for converting a series of M-bit information words into a modulated signal
CN1996480B (en) Conversion method and device of multilevel variable data and blue light multilevel optical storage device
EP1168332A3 (en) Adjust bit determining circuit
EP0319441A2 (en) Encoding for pit-per-transition optical data recording
CN1996479B (en) Conversion method and device for multilevel variable data and blue light multilevel optical storage device
JPH08235785A (en) Recording signal modulating device, recording signal demodulating device, recording signal modulating method and recording signal demodulating method
CN100555440C (en) The multistage brigade commander's data transfer device and the device that are used for red light multi-level optical storage device
KR100724354B1 (en) Method for modulating digital data and apparatus therefor
KR100531781B1 (en) Method and apparatus for modulating digital data and medium for recording modulated data generated thereby
JPS57183611A (en) Digital modulating method
CN100541638C (en) Multistage brigade commander's data transfer device and device and red light multi-level optical storage device
KR100575638B1 (en) Method and apparatus for coding information, method and apparatus for decoding coded information, method of fabricating a recording medium, the recording medium and modulated signal