Multi-level read-only recording using signal waveform modulation.
A novel multi-level read-only recording using signal waveform modulation (SWM) is presented. The SWM is realized by inserting a sub-pit/sub-land to the original land/pit. Numerical simulation provides a helpful tool for the write strategy optimization. This method is experimentally validated on the DVD platform. Comparing with 2-level recording, an increase of 50% in capacity can be expected. It shows superiority over signal amplitude modulation (SAM) multi-level in replication processing, capacity increase and servo performance.
Optical Memory National Engineering Research Center, Department of Precision Instrument and Mechanology, Tsinghua University, Beijing, 100084, China. tangyi00@mails.tsinghua.edu.cn
Yi
Y
Tang
Jing
J
Pei
Yi
Y
Ni
Longfa
L
Pan
Hua
H
Hu
Buqing
B
Zhang
D003198:Computer Simulation; D018625:Microscopy, Atomic Force; D055095:Optics and Photonics; D012815:Signal Processing, Computer-Assisted