Title :
A robust PRML read channel with digital timing recovery for multi-format optical disc
Author :
Koo, Gunjae ; Jung, Woochul ; Lee, Heesub
Author_Institution :
SoC Core Technol. Group, LG Electron. Inst. of Technol., Seoul
Abstract :
In this paper, a PRML read channel that supports multiple optical disc formats, i.e. CD, DVD and BD is presented. The read channel includes digital timing recovery that generates timing matched data by interpolation, which can acquire high controllability and stability with small hardware. PRML bit detection is applied to the read channel in order to reduce bit errors for severe channel condition such as BD and high speed DVD. Also, PR-level of PRML is adaptively controlled to compensate asymmetry and signal level shift due to defects. To support high operating speed, the read channel is designed in a 2times-parallel processing. The read channel uses a 115 MHz main clock, and can support up to 8times DVD, equivalent to a channel rate of 210 MHz
Keywords :
clocks; interpolation; maximum likelihood detection; optical disc storage; synchronisation; 115 MHz; 210 MHz; PRML bit detection; PRML read channel; bit errors; digital timing recovery; interpolation; multiformat optical disc; partial response maximum likelihood bit detector; signal level shift; timing matched data; Clocks; DVD; Finite impulse response filter; Frequency; High speed optical techniques; Optical filters; Optical signal processing; Robustness; Signal processing; Timing;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692943
