| 摘要 |
A record carrier for recording information by writing marks in a track has a recording layer with a pregroove ( 51 ). The pregroove has a wobble that has wobble modulation ( 52 ) for representing control information. The pregroove further has a pregroove modulation constituted by pregroove pit areas ( 54 ) having a predefined width and depth alternating with pregroove land areas ( 53 ) having a reduced depth and/or width, in particular zero depth. A majority of the pregroove land areas ( 53 ) is located at zero crossings of the wobble and a majority of the pregroove pit areas is located at peak values of the wobble for optimizing the wobble signal strength. A scanning device has wobble detection means for retrieving the control information from the wobble modulation, and pregroove demodulation means for retrieving the recording control information from the pregroove modulation. |
