发明名称 |
READ SIGNAL PROCESSING CIRCUIT, READ SIGNAL PROCESSING METHOD, AND OPTICAL DISC DRIVE |
摘要 |
The present invention provides a read channel and a drive capable of suppressing deterioration in performance of a PLL and a Viterbi decoder by using a DC component eliminating means capable of higher-speed operation than hitherto. The location of an edge is determined by using differential of a read signal, and a DC component is detected from the midpoint level of the edge. Detection of a pseudo-edge due to a long mark or space signal is prevented by limiting the absolute value of a maximum or minimum of a differential coefficient when the location of the edge is determined from the differential coefficient of the read signal. Internal operation of a DC component detector is controlled according to the state of the PLL and the magnitude of the DC component.
|
申请公布号 |
US2008284630(A1) |
申请公布日期 |
2008.11.20 |
申请号 |
US20070828381 |
申请日期 |
2007.07.26 |
申请人 |
KIKUGAWA ATSUSHI;KUROKAWA TAKAHIRO |
发明人 |
KIKUGAWA ATSUSHI;KUROKAWA TAKAHIRO |
分类号 |
H03M1/12;G11B7/00 |
主分类号 |
H03M1/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|