Clock signal generating system
AssigneePioneer Electronic Corporation
InventorsKazuo Kuroda, Toshio Suzuki, Masayoshi Yoshida
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Abstract
A clock signal generating system of the present invention is provided for recording information on a disc. The disc has a plurality of recording tracks wobbled by a wobble signal having a predetermined frequency and a plurality of prepits disposed at positions having a predetermined phase relation with respect to a phase of the wobble signal. A clock signal is generated based on the wobble signal. A prepit signal is produced from the prepit. The phase of the wobble signal is compared with a phase of the prepit signal, thereby generating a phase adjusting signal. The phase of the clock signal is adjusted based on the phase adjusting signal. A recording clock signal for recording the information is produced by an adjusted clock signal.
Claims11
An information recording apparatus for recording information on a recording medium having a wobbled recording track and a preformed data portion, the apparatus comprising:
- a detector which generates a detection signal obtained from the recording medium;
- a wobble signal extractor which extracts a wobble signal from the detection signal;
- a clock signal generator which generates a recording clock signal on the basis of the extracted wobble signal;
- and
- a data detector which detects, from the detection signal, a prerecorded data signal corresponding to the preformed data portion,
- wherein the information is recorded on the recording medium on the basis of the recording clock signal and the prerecorded data signal.
An information recording apparatus for recording information on a recording medium having a wobbled recording track and a preformed data portion, wherein the data portion is preformed in a discrete manner, having predetermined phase relation with respect to a wobble period of the wobbled recording track, and is dispersed with respect to a predetermined number of the wobble period of the wobbled recording track,
- the apparatus comprising:
- a detector which generates a detection signal obtained from the recording medium;
- a wobble signal extractor which extracts a wobble signal from the detection signal;
- a clock signal generator which generates a recording clock signal on the basis of the extracted wobble signal;
- and
- a data detector which detects, from the detection signal, a prerecorded data signal corresponding to the preformed data portion,
- wherein the information is recorded on the recording medium on the basis of the recording clock signal and the prerecorded data signal.
An information recording apparatus for recording information on a recording medium having a wobbled recording track and a preformed data portion,
- the apparatus comprising:
- a detector which generates a detection signal obtained from the recording medium;
- a wobble signal extractor which extracts a wobble signal from the detection signal;
- a data detector which detects, from the detection signal, a prerecorded data signal corresponding to the preformed data portion;
- and
- a clock signal generator which generates a recording clock signal on the basis of the extracted wobble signal and the prerecorded data signal,
- wherein the information is recorded on the recording medium on the basis of the recording clock signal and the prerecorded data signal.
Dependencies are inferred from the claim text.