KR970003057A - Optical Disc Player - Google Patents

Abstract

The present invention relates to an optical disc reproducing apparatus having an impact resistance function, capable of reproducing a video CD, a karaoke CD, or a CD-ROM, and also prevents a sound splashing due to foreign vibration during the reproduction of a music CD, and improves seismic performance. For the purpose of heightening, in the configuration, the optical disc 11 rotates faster than the standard speed to accumulate the CD-DA signal sequence in the first memory means 18. As soon as the system control means 15 detects the track jump or the focus shift, the optical servo means 14 instructs the re-access to the track position before the CD-DA signal sequence is cut off, and the shock resistant control means 19 is controlled to provide high speed. Stops the input of the CD-DA signal sequence, stops accumulation in the first memory means 18, and simultaneously controls the CD-DA signal sequence from the first memory means 18 at a standard speed so that music is not cut off. Playback from the normal track position is resumed before the accumulated memory is cleared. Signal sequences other than the CD-DA signal sequence are characterized by controlling the information signal sequencer means 17 and inputting it to the second digital signal separation means.

Description

Optical Disc Player

Since this is an open matter, no full text was included.

1 is a block diagram of an optical disc reproducing apparatus of a first embodiment of the present invention.

Claims (3)

A spindle motor for repositioning and rotating the optical disk, an optical pickup for focusing an optical beam on a data recording surface of the optical disk to read a digital signal recorded on the optical disk, and a digital signal output from the optical pickup. 1 digital signal processing means, optical servo means for performing rotation control of the spindle motor or optical control of the optical pickup, and control information or sub-code information outputted from the first digital signal processing means, and inputting the optical signal. At the same time as controlling the servo means, when the CD-DA signal sequence is identified while identifying the CD-DA signal sequence, which is the basic format of the CD, or a signal sequence other than the CD-DA signal sequence, the CD-DA signal sequence is identified. Is rotated faster than the standard speed, so that the high speed CD-DA signal sequence is generated in the first digital signal processing means. If an abnormality occurs in the output from the first digital signal processing means, an error occurrence command is output, and the optical servo means is controlled according to the error occurrence command to perform the optical pickup at a position immediately before the abnormality occurrence. System control means for accessing and outputting a normal return command when the output from the first digital signal processing means returns to a state before an abnormal occurrence, the CD-DA signal sequence outputted from the first digital signal processing means and the An information signal branching means for branching a signal sequence other than the CD-DA signal sequence by the identification command of the system control means, and, when the system control means identifies the CD-DA signal string, to the information signal sequencer means by the command. Converts the high-speed CD-DA signal string branched by the input into the CD-DA signal string at standard speed while accumulating in the first memory means. And the accumulation of the CD-DA signal sequence in the first memory means by the abnormal occurrence command of the system control means, and accumulating in the first memory means by the normal return command of the system control means. Inputting a signal sequence other than the CD-DA signal sequence branched by the information signal sequence branch means by the command when the system control means identifies a signal sequence other than the CD-DA signal sequence, Second digital signal processing means for converting to a digital decoded signal sequence in real time and using the second memory means as a buffer memory, and the CD-DA signal string output from the impact control means, or the second digital signal. And a digital-analog converting means for inputting the digital decoded signal string output from the processing means and converting the digital decoded signal string into an analog signal. Optical disc playback device characterized in that .. An optical disc reproducing apparatus according to claim 1, wherein a signal sequence other than the CD-DA signal sequence is an MPEG signal sequence and MPEG decoding processing means is provided in place of the second digital signal processing means. A signal sequence other than the CD-DA signal sequence is a CD-ROM signal sequence and drives the spindle motor faster than a standard speed, thereby outputting a high speed CD-ROM signal sequence from the first digital signal processing means, And a CD-ROM decoding processing means in place of the digital signal processing means. ※ Note: The disclosure is based on the initial application.