Information recording/reproducing apparatus and information reproducing method

An information reproducing apparatus for reproducing information data from a recording medium recorded with a synchronization signal and an address indicating a recording position which are preliminarily modulated, the information reproducing apparatus comprising:

• a reading unit for reading recorded information from the recording medium and obtaining a readout signal;
• a timing pulse generator for generating a demodulated timing pulse in variable generation timing;
• a demodulator for demodulating the synchronization signal and the address from the readout signal according to the demodulated timing pulse;
• an error corrector for carrying out an error correction process on the address data and obtaining corrected address data;
• an address judging section for determining whether or not the corrected address data is a correct address;
• and
• a synchronization controller for causing the timing pulse generator to execute a synchronization process for placing the generation timing in synchronism with the synchronization signal when the synchronization signal has a period equal to a predetermined period;
• whereby the synchronization controller, in the case the corrected address data is determined as a correct address, then puts the synchronization process into stand-by for execution until the corrected address data is determined as an incorrect address.

An information reproducing method for reproducing, from a recording medium recorded with a synchronization signal and an address indicating a recording position which are preliminarily modulated, the synchronization signal and address from the recording medium when recording or reproducing information data to or from the recording medium, the information reproducing method comprising:

• a reading step for reading recorded information from the recording medium and obtaining a readout signal;
• a timing pulse generating step for generating a demodulated timing pulse in variable generation timing;
• a demodulating step for demodulating the synchronization signal and the address data representative of the address, from the readout signal according to the demodulated timing pulse;
• an error correcting step for carrying out an error correction process on the address data and obtaining corrected address data;
• an address determining step for determining whether or not the corrected address data is a correct address;
• and a synchronization control step for executing a synchronization process for placing the generation timing in synchronism with the synchronization signal when the synchronization signal has a period equal to a predetermined period;
• whereby the synchronization control step, in the case the corrected address data is determined as a correct address, then puts the synchronization process into stand-by for execution until the corrected address data is determined as an incorrect address.