CD disc recording and reproducing device

Abstract

An optical disc recording and reproducing apparatus is provided. The apparatus detects the level of a focus error signal output from an optical pickup and a peak of the focus error signal occurred before the focus is obtained while an objective lens of the optical pickup moves in the focusing direction, discriminates a type of the loaded optical disc based on a first reference level or a second reference level, and actuates a focus servo before the objective lens moving in the focusing direction reaches a focalized position. Thus, a read only disc or a recordable disc can be rapidly reproduced.

Description

Technical field: [0001] The present invention relates to a device for recording and playing data to or from an optical disc, and more particularly relates to a device that can identify a read-only optical disc and record it to perform an appropriate playback process according to the type of the optical disc. Background technique: [0002] In recent years, minidisc (MD) recorders, MD players, and devices for recording and reproducing information data by using one of writable optical disks as optical disks have been widely used. [0003] MD recorders and MD players are compact disc recording and playback devices that can be used to play read-only and recordable compact discs in the same manner as compact disc (CD) players. [0004] The generally known first traditional example is to identify whether the optical disc is a read-only optical disc or a recordable optical disc through a sensor hole provided on the chuck head of the optical disc, and automatically switch the disc ty...

AI Technical Summary

Problems solved by technology

This increases component count and cost

In addition, in the case of using a portable disc recording and playback device, it is necessary to provide a space for a detector for identifying the type of disc, so that the size of the device cannot be reduced

Images