KR0129991B1 - Motion video reproducing apparatus of compack disc - Google Patents

Abstract

A compact disk motion picture reproduction device reproduces an audio signal and video signal as a digital signal, replaces an optical disk reproduction device with a low cost, and reduces a size of a system. The device includes: a switch(90) for switching a motion picture disk play and a prior disk play by an output signal of a signal processor(60); CD-ROM decoder(100) for correcting an error according to a CD-ROM standard in case of a motion picture disk reproduction, and decoding a compressed motion picture data; a motion picture controller(110) for controlling a system, and dividing the output signal of the CD-ROM decoder(100) into video signal and audio signal; a video decoder(130) and an audio decoder(140) for storing the video signal and the audio signal from the motion picture controller(110) to a motion picture format before a compression; and first DAC(150) and second DAC(160) for converting a digital signal from the decoders(130,140) to an analog signal.

Description

Compact Disc Movie Playback Device

1 is a block diagram of a compact disc moving picture reproducing apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

10: disc 20: optical pickup device

30: RF amplifier 40: servo unit

50: disk assembly motor 60: signal processing unit

70: system control unit 80: key input unit

90: switching means 100: CD-ROM decoder

110: moving picture control unit 120: ROM

130: video decoder 140: audio decoder

150 to 170: 1 to 3D / A converter 180: RGB decoder

The present invention relates to a compact disc moving picture reproducing apparatus in an optical disc reproducing apparatus, and more particularly to a compact disc moving picture reproducing apparatus for reproducing moving pictures such as movies and videos.

In general, an optical disc reproducing apparatus is a reproducing apparatus using an optical disc as a recording medium, and examples thereof include a compact disc player, a laser disc player and a video disc player.

In such an optical disc reproducing apparatus, audio is reproduced as a digital signal and an image as an analog signal. In addition, since the disk size is 30 cm, it is difficult to use it as a portable device and takes a lot of space.

In addition, since the video is recorded as an analog signal, there is a problem that the more the playback, the disk is damaged.

Accordingly, an object of the present invention is to provide a compact disc moving picture reproducing apparatus capable of reproducing a moving picture recorded as a digital signal on a compact disc having a size of 12 cm in order to solve the above problems.

A compact disc moving picture reproducing apparatus of an optical disc reproducing apparatus having a moving picture disc, an optical pickup device, an RF amplifier, a servo part, a disc rotating motor, a signal processing part, a system control part, and a key input part in order to achieve the above object, Switching means for switching between the moving picture disc reproduction and the existing disc reproduction by the processed signal; In the case of playing the moving picture disc in the switching means, a CD-ROM decoder for decoding the compressed moving picture data after correcting the error again according to the CD-ROM standard, and controlling the system and outputting the signal output from the CD-ROM decoder. A moving picture controller for separating the video signal and the audio signal, respectively; A video decoder and an audio decoder for extending the video signal and the audio signal output from the moving picture controller to a moving picture format before compression; And a first digital / analog converter and a second digital / analog converter for converting the digital signals output from the video decoder and the audio decoder into analog signals.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

1 is a block diagram of a compact disc moving picture reproducing apparatus, which reproduces a moving picture disc and outputs video data and audio data, respectively.

In FIG. 1, the disc 10 is a disc recorded by compressing it in the Moving Picture Expert Group1 (MPEG1) format. In other words, the signal recorded on the disk 10 is a full motion video such as a movie or a video.

The optical pickup device 20 picks up the recorded information from the disc 10 and transfers it as the optical disc rotates. The RF amplifier 30 amplifies the information picked up from the pickup device 20 and detects photoelectric conversion, moving pictures, and error signals.

The servo unit 40 controls the signal amplified by the RF amplifier 30 to form an EFM (Eight to Fourteen) waveform. In addition, the focusing and tracking of the optical pickup apparatus 10 is controlled.

The signal processor 60 slices and digitizes the signal output from the RF amplifier 30, demodulates an EFM signal, and performs error correction processing.

The disk rotation motor 50 transfers a certain rotation of the disk 10 and the position of the pickup device 20.

The system controller 70 performs overall control of the system and controls the servo unit 40 and the signal processing unit 60.

The key input unit 80 is a means for applying a control command of the user.

The switching means 90 switches between the moving picture disc and the existing compact disc or laser disc.

The CD-ROM decoder 100 demodulates the digital signal output from the signal processor 60 after error correction.

The moving picture control unit 110 controls the system and separates the video signal and the audio signal by the MPEG1 prescribed algorithm.

The ROM (Read Only Memory) 120 stores a program for system commands.

The video decoder 130 and the audio decoder 140 extend the signal recorded by the MPEG1 standard to the original signal in the reverse order of the MPEG1 standard.

The first to 3D / A converters 150 to 170 convert the digital signal into an analog signal.

The RGM decoder 180 converts an RGB signal into a composite signal.

Hereinafter, an operation of an embodiment of the compact disc moving picture apparatus according to the present invention will be described.

When the disk 10 is loaded into the system, the optical pickup device 20 picks up the information recorded on the disk. The picked-up information is amplified by the RF amplifier 30 and input to the servo unit 40 and the signal processing unit 60.

The servo unit 40 performs a jump and seek operation on the track under the control of the system controller 70. The signal processor 40 digitally processes the amplified signal, and then performs EMF demodulation and error correction. The signal processor 40 deletes an auxiliary signal such as an error correction signal and outputs a digital signal.

Next, the system controller 60 receives the signal from the signal processor 60 as an input and reads the lead-in area of the disk 10 to determine the disk. If it is a moving picture disk, the reference contact SO is connected to the first contact point S1 in the switching means 90, and if it is an existing disk other than the moving picture disk, the reference contact SO is connected to the second contact point S2.

When the moving means disk is switched by the switching means 90, the CD-ROM decoder 100 outputs only the MPEG1 standard signal after error correction and demodulation. Here, the moving picture disc compresses the signal in the MPEG1 standard at the time of recording and changes the signal into the CD-ROM format. After modulating to the CD format, the auxiliary signal is added and recorded on the disc. Therefore, during reproduction, the signal reproduced by the optical pickup means 20 is demodulated by the signal processing unit 60, the auxiliary signal is deleted, and the CD-ROM decoder 100 demodulates the signal as MPEG1 standard.

Next, the moving picture control unit 110 separates the MPEG1 signal output from the CD-ROM decoder 100 into a video MPEG1 signal and an audio MPEG1 signal by the MPEG1 algorithm, respectively.

The video decoder 130 and the audio decoder 14 restore the video MPEG1 signal and the audio MPEG1 signal separated by the moving picture controller 110 to the original signal.

The first D / A converter 150 converts the signal output from the video decoder 130 into a video analog signal, and the second D / A converter 160 converts the signal output from the audio decoder 140 into an audio analog signal. The 3D / A converter 170 converts the digital signal of the existing compact disc into an analog signal.

The RGB converter 170 converts the RGB video signal into a composite video signal.

As described above, the compact disc moving picture reproducing apparatus of the present invention can not only replace an optical disc reproducing apparatus such as a laser disc player at a low cost by reproducing processing not only audio but also a video from a small disc having a size of 12 cm. The system has the advantage of miniaturization.

Claims (2)

The moving picture disc 10, the optical pickup device 20, the RF amplifier 30, the servo unit 40, the disc rotating motor 50, the signal processing unit 60, the system control unit 70 and the key input unit 80 An optical disc reproducing apparatus comprising: switching means (90) for switching between the moving picture disc reproduction and the existing disc reproduction by the signal processed by the signal processing unit (60); A CD-ROM decoder (100) for decoding the compressed moving image data after correcting an error again according to the CD-ROM standard in the case of playing the moving image disc in the switching means (90); A moving picture control unit (110) for controlling the system and separating the signal output from the CD-ROM decoder (100) into a video signal and an audio signal, respectively; A video decoder (130) and an audio decoder (140) for extending the video signal and the audio signal output from the video controller (110) to a video format before compression; And a first digital / analog converter 150 and a second digital / analog converter 160 for converting the digital signals output from the video decoder 130 and the audio decoder 140 into analog signals. Compact disc moving picture playback device. The compact disc moving picture reproducing apparatus according to claim 1, wherein the moving picture disc (10) is recorded in MPEG1 standard.