Patent ID: 6954418
Filing Date: 2005-10-11
Classification: G11B

Abstract:
1. A signal synthesizing apparatus comprising: an optical pickup including a plurality of light receiving planes for receiving a light beam returning from an optical disc when a reading beam of light is radiated to the optical disc, and for producing a plurality of signals; adjusting means for adjusting signal levels of the plurality of signals such that each of the signal levels of the plurality of signals becomes equal to a reference level determined from at least one of the signal levels of the plurality of signals; and synthesizing means for synthesizing the plurality of signals after the signal levels of the plurality of signals are adjusted by the adjusting means to obtain a synthesized signal, wherein the reference level comprises a signal level of one of the plurality of signals, and the adjusting means adjusts signal levels of others of the plurality of signals such that each of the signal levels of the others of the plurality of signals becomes equal to the signal level of the one of the plurality of signals.