Data modulation method and apparatus capable of suppressing...

Details Data modulation method and apparatus capable of suppressing... Data modulation method and apparatus capable of suppressing...

2007-09-25

2007-09-25

Chase, Shelly (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

Reexamination Certificate

active

10791268

ABSTRACT:
A data modulation method to suppress a DC component using parity information of a synchronization codeword, and an apparatus for executing the method. Input data is multiplexed according to multiplexing information, the synchronization codeword including the multiplexing information for a multiplexed data stream is inserted, modulation is performed and plural modulated data streams are output, and a respective one of the modulated data streams having a DC component, which is smallest is selected from among the modulated streams. The synchronization codeword has a bit to control the parity of the codeword, and the input data is multiplexed according to whether a parity of the synchronization codeword is even or is odd. Thus, the DC component included in the modulated codeword stream may be more effectively suppressed without a decrease in a code rate.

REFERENCES:
patent: 5757752 (1998-05-01), Kunisa
patent: 6002718 (1999-12-01), Roth
patent: 6654425 (2003-11-01), Itoh et al.
patent: 0 763 918 (1997-03-01), None
patent: 0 771 078 (1997-05-01), None
patent: 1 274 172 (2003-01-01), None
Kunisa, Akiomi, Comparison of two guided scrambling schemes for optical disks, Aug. 2002, IEEE Trans. on Consumer Electronics, vol. 48, No. 3, pp. 584-588.
Search Report issued on Feb. 21, 2007 by the European Patent Office for European Patent Application No. 04251274.9.
Kunsia. “Runlength Control Based on Guided Scrambling for Digital Magnetic Recording” IEICE Transactions on Electronics, Electronics Society, Tokyo, JP, vol. E82-C, No. 12, Dec. 1999, pp. 2209-2217.

Affiliated with

Also associated with

Rating

Data modulation method and apparatus capable of suppressing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data modulation method and apparatus capable of suppressing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data modulation method and apparatus capable of suppressing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3734230