| 摘要 |
<P>PROBLEM TO BE SOLVED: To properly perform amplitude normalization of multi-value data, using an amplitude normalization signal such that servo control is not unstable. <P>SOLUTION: Because the multi-value data of two different values (for example, 7 and 1) which are arranged in the state of a solitary wave, as the amplitude normalization signal, are used, the DC component is little, the servo control of an optical disk can be made so as not to be unstable, and the sampling of the multi-value data can be performed by a PLL circuit, on the basis of one solitary wave, for example 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
