Advanced Technologies for Read Channel on Blu-ray Disc

概要

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We propose advanced technologies to enhance the system performances of the Blu-ray disc (BD) system. The technologies are based on the read channel that we reported previously. Our previous read-channel was designed for a modulation code with Tmin (minimum length between transition) of 3 and whose $f_{\text{s}}$ (system clock frequency) was higher than $1.5\times f_{\text{c}}$ (channel rate). To achieve technical subjects such as robustness against asymmetry and noise on the BD, our target changed to a read-channel designed for a modulation code with Tmin of 2 (17pp modulation code). Furthermore, to achieve practical subjects for a production, the system clock frequency of the new read-channel became half-rate ($ f_{\text{s}}$ is higher than $0.75\times f_{\text{c}}$) for saving power consumption, and the performance of the digital phase locked loop (DPLL) was reinforced for random access.
2004-07-15