Abstract: Provided are a method for detecting a pattern of an over-sampling image and an optical information processing apparatus and method using the same. A method for detecting a pattern from an image of an over-sampled datapage includes: over-sampling the datapage to detect a detection image of the datapage; comparing the detection image and a reference image of over-sampling for the pattern by a covariance; and calculating a pixel of the pattern over-sampled by values of the reference image and the detection image compared by the covariance. Accordingly, data with a specific pattern such as a mark can be detected from an image of an over-sampled datapage, thereby making it possible to increase the data reproduction accuracy, thus making it possible to greatly increase the reliability of reproduced optical data.

Abstract: A disc clamping apparatus for a compact disc player. The apparatus has a clamp for clamping a disc loaded on a turntable, an elastic wire for upwardly lifting the clamp and for horizontally maintaining the clamp above the turntable, a pair of extension bars connected to a spring to downwardly bias the elastic wire, and a serpentine bar which makes contact with an upper surface of the clamp to allow the clamp to stably rotate. The apparatus does not make contact with the disc while the disc is being inserted/ejected into/from the disc player, so damage to the disc or to the clamp can be prevented. Since the clamp is horizontally maintained above the turntable by the elastic wire, the clamp does not fluctuate while a user is driving the vehicle, so the clamp is prevented from colliding with a cover plate, thereby reducing the noise.