Analysis of differential phase detection signal of a novel multi-level read-only disc

作者：Yan Mingming^*; Pei Jing; Pan Longfa; Tang Yi

来源：Chinese Optics Letters, 2009, 7(5): 424-427.

DOI：10.3788/COL20090705.0422

To improve the tracking servo performance, a novel signal waveform multi-level (SWML) read-only disc realized on the digital versatile disc (DVD) platform is presented. The characteristic of the differential phase detection (DPD) signal of the SWML read-only disc is analyzed both in theory and experiment. The amplitude of the DPD signal of the SWML read-only disc in an open tracking servo loop is about 2/3 of that of the DVD read-only disc. The uniformity and symmetry of the DPD signal of the SWML read-only disc are similar to those of the DVD read-only disc and better than the former multi-level run-length limited (ML-RLL) read-only disc.

• 出版日期2009-5-10
• 单位清华大学