发明名称 |
Read channel apparatus and method for an optical storage system |
摘要 |
A read channel apparatus is disclosed for reading data recorded on an optical storage system at a predetermined baud rate. The apparatus asynchronously samples an analog read signal generating from the optical storage system and subtracts an estimated DC offset from the asynchronous sample values to generate a sequence of asynchronous DC-removed sample values. The asynchronous DC-removed sample values are separately interpolated by two interpolators to generate a sequence of synchronous even-time sample values and a sequence of synchronous odd-time sample values respectively. The synchronous even-time and odd-time sample values are separately equalized by two equalizers in accordance with a target spectrum to generate a sequence of even-time equalized sample values and a sequence of odd-time equalized sample values respectively. A DC offset estimator generates the estimated DC offset from the even-time equalized sample values and the odd-time equalized sample values. The interpolators are under the control of a timing recovery controller for synchronizing the even-time and odd-time sample values to the baud rate. In the preferred embodiment, the recorded data are determined from the even-time equalized sample values and the odd-time equalized sample values.
|
申请公布号 |
US2003043898(A1) |
申请公布日期 |
2003.03.06 |
申请号 |
US20010947169 |
申请日期 |
2001.09.05 |
申请人 |
ACER LABORATORIES, INC. |
发明人 |
HUANG KE-CHIANG;WANG TZU-PAI |
分类号 |
G11B20/10;H04L7/02;(IPC1-7):H03K5/159;H03H7/30;H03H7/40;H04L7/00 |
主分类号 |
G11B20/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|