Clock signal generating system
AssigneePioneer Electric 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.
Claims16
An information recording apparatus for recording information according to a recording clock (SCR) on a disc which has a plurality of recording tracks wobbled by a wobble signal (SWB) 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, the information recording apparatus comprising:
- a prepit signal detector for detecting said prepit and generating a prepit signal (SPD);
- and
- a phase adjusting circuit for adjusting a phase of said recording clock based on said prepit signal and said wobble signal.
An information recording method for recording information according to a recording clock on a disc which has 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, the information recording method comprising the steps of:
- detecting said prepit;
- generating a prepit signal based on said detection;
- and
- adjusting a phase of said recording clock based on said prepit signal and said wobble signal.
Dependencies are inferred from the claim text.