Abstract: A signal processing apparatus for an optical disc with a first type region and a second type region is disclosed. The signal processing apparatus comprises: a determining unit, arranged to determine that an input signal is a first type input signal derived from the first type region or a second type input signal derived from the second type region; a peak-bottom detector, arranged to detect a peak-bottom value of the input signal; and a control circuit arranged to determine that the peak-bottom value is derived from the first type input signal or the second type input signal according to a determining result from the determining unit.

Abstract: A signal processing apparatus for an optical disc with a first type region and a second type region includes a processing module and a determining unit. The processing module is used for transforming an input signal to generate a first output signal according to a first amplifying gain, or to amplify the input signal to generate a second output signal according to a second amplifying gain, wherein the input signal is derived from an optical pickup head. The determining unit is coupled to the processing module and arranged to control the processing module to output the first output signal when the input signal is derived from the first type region. Also, the determining unit outputs the second output signal when the input signal is derived from the second type region.

Abstract: A method for upgrading a flash ROM of an optical disk drive and a chip for performing the method. The method includes sending an activating program to a first scratch pad memory, sending a firmware data to a second scratch pad memory, utilizing a microprocessor to load the activating program from the first scratch pad memory for upgrading the firmware sequence, and the upgraded firmware sequence records the firmware data stored in the second scratch pad memory into a flash ROM.