Device and method distinguishing CD disc

Application Number: 00105207
Application Date: 2000.03.29
Publication Number: 1268736
Publication Date: 2000.10.04
Priority Information: 1999/3/30 KR 10952/99
International: G11B7/00;G11B19/04;G11B19/12
Applicant(s) Name: Samsung Electronics Co., Ltd.
Inventor(s) Name: Hwang Yong-Ha
Patent Agency Code: 11105
Patent Agent: ma ying
Abstract 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 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 for detecting the amplitude of the detected envelope signal, and a disc discriminator 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.