New Edge-Shift Detection Method for Write Strategy Optimization in High-Density Optical Disc Recording
Takahiro Kurokawa, Hiroyuki Minemura, Atsushi Kikukawa, Koichi Watanabe · Japanese Journal of Applied Physics · 2011
We propose a sophisticated edge-shift detection method based on the partial response maximum likelihood technology for high-density optical disc recordings. One of the major features is the capability of detecting the edge shifts of short marks that cannot be optically resolved. Another feature is that measured values are not affected by the signal-to-noise ratio in a readout signal. This ensures drive compatibility. Furthermore, the edge-shift values are sorted and evaluated corresponding to the write pulse control parameters for simplifying write strategy optimization. These features make write strategy optimization possible under an areal recording density of over 30 Gbyte/layer.