KR19980025761A - Compact Disc Drives for Multimedia - Google Patents

Abstract

Disclosed is a compact disc drive for multimedia. The drive includes a compact disc drive for controlling various servos with a microcomputer to reproduce data of a compact disc, comprising: audio signal processing means for converting and reproducing the reproduced data into an analog signal when the compact disc is for audio; And video signal processing means for processing the playback data to act directly on the monitor when the compact disc is for video. As a result, functions of a CD-ROM drive, a player for an audio compact disc, and a player for a video compact disc can be realized.

Description

Compact Disc Drives for Multimedia

The present invention relates to a compact disc drive for multimedia.

Ahead of the multimedia era, there is a need to deliver information that is explosively increasing more quickly and accurately. In the case of compact discs, there are various types of CD-ROMs, audio compact discs, and video compact discs. Accordingly, there are various types of compact disc drives such as CD-ROM drives, compact disc players, and video compact disc drives. Here, the CD-ROM drive is a drive for reading data stored in the CD-ROM and transferring it to a host computer. The compact disc player is a drive for reproducing a digital audio signal recorded on an audio compact disc as an analog audio signal. The video compact disc drive is a drive for reading a video signal recorded on the video compact disc and transmitting it to a host computer. Since the various compact disk drives are separated from each other and there is no compatibility with each other, it causes user inconvenience and is not suitable for the compact disk drive for multimedia. Recently, a drive capable of combining the CD-ROM drive and the video compact disc drive has been developed. However, a host computer having a separate video signal interface is required to use the video compact disc. Compact disc players, on the other hand, require a separate amplification circuit.

An object of the present invention is to provide a compact disc drive for multimedia that can realize all the functions of a CD-ROM drive, a player for an audio compact disc, and a player for a video compact disc.

1 is a schematic block diagram showing a compact disc drive for multimedia according to the present invention.

* Description of the symbols for the main parts of the drawings *

10 ... pickup, 11 ... spindle motor,

12 ... turn-table, 13 ... compact disc,

14 servo signal processor, 15 digital signal processor,

16 microcomputers, 17 decoders,

18 buffer-ram, 19 interface,

20 audio signal processor, 21 video signal processor,

22 user input, 201 digital to analog converter,

202 amplifier, 211 MPEG element,

212 Video interface.

In order to achieve the above technical problem, a compact disc drive for multimedia according to the present invention is a compact disc drive for reproducing data of a compact disc by controlling various servos with a microcomputer. Audio signal processing means for converting and amplifying an analog signal; And video signal processing means for processing the playback data to act directly on the monitor when the compact disc is for video.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic block diagram showing a compact disc drive for multimedia according to the present invention. As shown in FIG. 1, the multimedia compact disc drive of the present embodiment includes: a pickup 10; A turn-table 12 into which the compact disc 13 is loaded; A spindle motor 11 for rotating the turn-table 12; A servo signal processor 14 for processing the photodetection signal from the pickup 10 to generate a tracking control signal, a focusing control signal, and a Radio-Frequency (RF) signal; A digital signal processor 15 for processing the RF signal to generate a spindle control signal; A decoder 17 for decoding the RF signal to generate a data signal; A buffer-ram 18 for storing a data signal from the decoder 17; A microcomputer (16) for controlling the servo signal processor (14), digital signal processor (15), decoder (17), and buffer-ram (18); An interface 19 for relaying an input / output signal with a host computer and a data signal of the buffer RAM 18; An audio signal processor 20 for converting and amplifying an RF signal into an analog signal when the compact disc 13 is for audio; A video signal processor 21 for processing a data signal output through the interface 19 to directly act on the monitor when the compact disc 13 is for video; And a user input unit 22 for inputting a command signal by the user to the microcomputer 16. The audio signal processor 20 may include a digital to analog converter 201 for converting an RF signal into an analog signal; And an amplifier 202 for amplifying and outputting the converted analog signal. On the other hand, the video signal processing unit 21 includes: a moving picture expert group (MPEG) element 211 for restoring processing to increase the reproducibility of the output video data signal; And a video interface 212 that relays the output signal of the MPEG element 211 to act directly on the monitor.

After the user loads the CD-ROM onto the turn-table 12 and selects the CD-ROM mode in the user input unit 22, the microcomputer 16 controls each servo according to a read command from the host computer. Access CD-ROM data. At this time, the light detection signal from the pickup 10 is converted into an RF signal by the servo signal processor 14. This RF signal is input to the decoder 17 through the digital signal processor 15. The data signal from the decoder 17 is stored in the buffer-RAM 18 and then transmitted to the computer via the interface 19.

After the user loads the audio compact disc onto the turn-table 12, selects the audio mode in the user input unit 22 and inputs a detailed command related thereto. Accordingly, the microcomputer 16 controls each servo to output the audio. Access digital audio data on a compact disc. At this time, the light detection signal from the pickup 10 is converted into an RF signal by the servo signal processor 14. This RF signal is input to the digital-to-analog converter 201 through the digital signal processor 15. The analog signal from the digital / analog converter 201 is amplified by the amplifier 202 and output. In this case, the user may hear the reproduced sound by connecting the speaker to the audio output terminal, that is, the output terminal of the amplifier 202.

After the user loads the video compact disc onto the turn-table 12, selects the video mode in the user input unit 22 and inputs a detailed command related thereto. Accordingly, the microcomputer 16 controls each servo to control the video. Access video data on a compact disc. At this time, the light detection signal from the pickup 10 is converted into an RF signal by the servo signal processor 14. This RF signal is input to the decoder 17 through the digital signal processor 15. The video data signal from the decoder 17 is stored in the buffer RAM 18 and then input to the MPEG element 211 via the interface 19. The video data signal reconstructed by the MPEG element 211 for reproducibility is output through the video interface 212. In this case, the user may view the reproduced image by connecting the monitor to the video output terminal, that is, the output terminal of the video interface 212.

The present invention is not limited to the above embodiments, and modifications and improvements are possible at the level of those skilled in the art.

As described above, according to the multimedia compact disc drive according to the present invention, all the functions of the CD-ROM drive, the player for an audio compact disc, and the player for a video compact disc can be realized.

Claims (6)

In a compact disc drive that controls various servos with a microcomputer to reproduce data on the compact disc, Audio signal processing means for converting said reproduced data into an analog signal and amplifying said compact disc for audio; And And a video signal processing means for processing the reproduced data to act directly on the monitor when the compact disc is for video. The method of claim 1, wherein the audio signal processing means, A digital / analog converter for converting the reproduction data into an analog signal; And And an amplifier for amplifying and outputting the converted analog signal. The video signal processing means of claim 1, An MPEG element for restoring processing to increase the reproducibility of the reproduced data; And And a video interface which relays an output signal of the MPEG element to operate directly on a monitor. In a compact disc drive that controls various servos with a microcomputer to reproduce data on the compact disc, A pickup for generating a photodetection signal; A turn-table on which the compact disc is loaded; A spindle motor for rotating the turn-table; A servo signal processor which processes the photodetection signal from the pickup to generate a tracking control signal, a focusing control signal, and an RF signal; A digital signal processor for processing the RF signal to generate a spindle control signal; A decoder for decoding the RF signal to generate a data signal; A buffer-RAM for storing a data signal from the decoder; An interface for relaying an input / output signal with a host computer and a data signal of the buffer-RAM; Audio signal processing means for converting and amplifying the RF signal into an analog signal when the compact disc is for audio; Video signal processing means for processing the data signal output through the interface to directly act on the monitor when the compact disc is for video; And And user input means for inputting a command signal by a user to the microcomputer. The method of claim 4, wherein the audio signal processing means, A digital / analog converter for converting the reproduction data into an analog signal; And And an amplifier for amplifying and outputting the converted analog signal. The video signal processing means according to claim 4, An MPEG element for restoring processing to increase the reproducibility of the reproduced data; And And a video interface which relays an output signal of the MPEG element to operate directly on a monitor.