Title :
Bimodulation code for signal waveform modulation multilevel optical disc
Author :
Liu, H.L. ; Pei, Jian ; Pan, Long Fa ; Tang, Yuchen ; Liu, Xian Wei
Author_Institution :
Dept. of Precision Instrum. & Mech., Tsinghua Univ., Beijing, China
Abstract :
A new method for implementing a multilevel run length limited (ML-RLL) modulation code used in a signal waveform modulation multilevel (SWMM) optical disc, termed bimodulation code (BMC), is proposed. BMC is implemented with two steps: run length modulation and level modulation. A code rate of 5/6 BMC is realised, and the code efficiency reaches 94.47%. The parameter user bits per 400 nm of the presented code is 1.96, which is 30.7% more than that of EFMplus code used in a DVD system.
Keywords :
modulation coding; runlength codes; bimodulation code; multilevel run length limited modulation code; signal waveform modulation multilevel optical disc;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.1136
