Optimization of modulation code for a multilayer disc
Hongda Yue · Journal of Tsinghua University(Science and Technology) · 2002
The current modulation code for a multilayer parallelaccess disc was optimized to increase the storage density. Two problems which affect the optimization are the acceptable jitter and the phaselocked loop (PLL) synchronization process. A novel method is proposed for procuring the clock information for a multilayer disc, which satisfies the PLL requirements. The effectiveness of the method was proven using probability theory. The optimized PLL parameters for the multilayer disc are d=4 and k=1015 which improve the track density by 15%23%.