Patent ID: 7342859

Claim:
An optical recording system comprising: a recording module for recording input data to a recording medium; a wobble signal generator adapted for reproducing a wobble signal associated with a physical track of the recording medium being recorded with the input data by said recording module; a wobble signal demodulator coupled to said wobble signal generator for demodulating the wobble signal so as to obtain a wobble sync signal therefrom; a mode control switch coupled to said recording module and said wobble signal demodulator, said mode control switch being operable so as to switch operation of said recording module from a default constant angular velocity (CAV) recording mode to a constant linear velocity (CLV) recording mode in accordance with the wobble sync signal from said wobble signal demodulator; a write clock signal generator coupled to said wobble signal demodulator for receiving the wobble sync signal therefrom, said write clock signal generator being further coupled to said mode control switch and generating a first write clock signal from the wobble sync signal when said recording module is operated by said mode control switch in the CAV recording mode; and a processor unit coupled to said write clock signal generator and said mode control switch, said processor unit receiving the first write clock signal and comparing the first write clock signal with a threshold signal corresponding to a threshold recording speed in the CAV recording mode, said processor unit forcing said mode control switch to switch operation of said recording module to the CLV recording mode when result of the comparison performed by said processor unit indicates that the recording mode should be switched to the CLV recording mode but said mode control switch still keep said recording module staying in the CAV recording mode.