| 摘要 |
An optical disc discrimination apparatus and method can discriminate a type of a disc loaded on a DVD-RAM drive accurately and simply. The optical disc discrimination apparatus includes a RF envelope generator (13) for generating an envelope signal from a RF signal read from a loaded disc at an off-track state, when only a focusing is accomplished prior to performing a tracking control, an envelope amplitude detector (22) for detecting the amplitude of the detected envelope signal, and a disc discriminator (24) for comparing the amplitude of the detected envelope signal with predetermined reference level and discriminating whether the disc is a CD, a DVD-ROM, or a DVD-RAM, based on the comparison result. Thus, a type of the disc can be discriminated simply and accurately with a change in the amplitude of the RF signal. <IMAGE> |
