Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
変調装置及び変調方法並びに復調装置及び復調方法
Document Type and Number:
Japanese Patent JP4123109
Kind Code:
B2
Abstract:
A succession of input data words is converted into a first succession of information code words including first candidate one and a second succession of information code words including second candidate one different from first candidate one. One is selected from the first succession of information code words and the second succession of information code words as a final succession of information code words in a manner such that the absolute value of a DSV relating to the final information-code-word succession will be smaller. Check bits are generated in response to the final information-code-word succession and a predetermined parity generation matrix of LDPC encoding. The check bits are changed to conversion code words. The final information-code-word succession and the conversion code words are combined into an output-code-word sequence which obeys (1, k) RLL, where "k" is a predetermined natural number in the range of 9 to 12.

Inventors:
Atsushi Hayami
Application Number:
JP2003305758A
Publication Date:
July 23, 2008
Filing Date:
August 29, 2003
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Victor Company of Japan, Ltd.
International Classes:
G11B20/14; G11B20/18; H03M5/14; H03M7/14; H03M13/11; H03M13/19; H03M13/31; H04L25/49
Domestic Patent References:
JP2000332613A
JP2003123400A
Attorney, Agent or Firm:
Toshikazu Nagai