KR0165311B1 - Mixed player of cd-1 and cd-rom and the reproducing method - Google Patents

Abstract

The present invention relates to a system capable of operating all compact disc media regardless of the format of data recorded on the compact disc. The present invention relates to a system for determining a recording format of a compact disc, generating a predetermined control signal S-md, and performing decoding. A CD drive, a CDI card that controls the output direction of data in accordance with the control signal S-md and performs signal processing for playing a compact disc, and performs signal processing of the CD-ROM data in accordance with the control signal S-md. It consists of a PC that reproduces audio and video signals processed by the CDI card, providing the effect of operating any compact disc media.

Description

CDI / CD-ROM integrated player and how to play

1 is a schematic configuration diagram of a CD-ROM player.

2 is a schematic configuration diagram of a CDI player.

3 is a block diagram of a CDI / CD-ROM integrated player according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia playback apparatus using a compact disc, and more particularly, to a system capable of operating all compact disc media regardless of the recording format of data recorded on the compact disc.

In general, a compact disc (CD) has many applications due to its high density, high capacity, and fast access time. Therefore, CD-DA (Digital Audio), CD-G (Graphic), CD-ROM (Read Only Memory), CDI (Interactive) A variety of discs that apply audio CDs, such as PHOTO-CD, are widely used, and other products except CD-ROM and CDI are simple players by their own Micom, which output audio or video by decoding information read from compact discs. On the other hand, in addition to the above functions, CD-ROM and CDI require a host processor (PC) equipped with an operating system (OS) and perform various data operations.

1 is a schematic configuration diagram of a CD-ROM player, wherein a CD-ROM is a CD-ROM drive 10 that is a computer peripheral device for playing data, a personal computer (PC) 50 that is a host part, It requires a host interface (90) for connecting the CD-ROM drive 10 and the host (PC: 50), and the CD-ROM drive 10 has a deck for mounting a compact disc to read signals from the compact disc. (11), the servo unit 12 which converts the RF signal reflected from the compact disc into a digital signal and performs various controls for the disc variation, and the EFM data recorded on the compact disc by inputting the output of the servo unit to correct an error. Inputs the signal processing unit 13 to decode the CD-ROM decoder 14 to decode the CD-ROM data, and inputs the digital audio output of the signal processing unit 13 to Output as an analog audio signal It consists of the audio D / A converter 15, a servo unit 12 and the signal processing section 13 and the first microcomputer 16 for controlling the CD-ROM decoder 14. The host interface 90 is for the interface between the CD-ROM drive 10 and the host computer 50 to synchronize signals and satisfy connector specifications. The host computer 50 processes the digital data and application programs input from the CD-ROM drive 10 and installs the CD-ROM drive 10 to operate the CO-ROM drive 10 through the microcomputer 16. .

2 is a schematic configuration diagram of a CDI player, and the same parts as those in FIG. 1 are denoted by the same reference numerals and detailed description thereof will be omitted. The CDI driver 10 'of the CDI player has the same role as the CO-ROM drive 10, and the deck 11, the servo unit 12, the signal processing unit 13, the microcomputer 2 16' and the CDI decoder 14 The CDI decoder 14 'includes a function of the CD-ROM decoder 14, a function of decoding ADPCM (Adaptive Differential Pulse Code Modulation) audio used in CDI, and an interface with a host. In addition, the functions of signal processing by the host computer 50 of the CD-ROM are played back in the VDSC (Video Decoder System Controller) 21 under the direction of the 68000 series processor (MPU: 20). The video D / A converter 23 converts the digital signal into an analog signal and decodes the video data, and the MPEG audio decoder 24 decodes the MPEG audio data to output the digital signal in the audio D / A converter 25. Output by converting to analog signal Said sends a final output on a television. Infra red (IR) and mouse can be used as input devices.

CD-ROMs act as computer peripherals and are mainly used for business purposes, and CD-I is a part of home multimedia devices. Media using compact discs is generally intended to work on CD-ROM and CDI playback, since the media only need a simple decoder that does not require an operating system. However, because CD-ROM discs and CDI discs do not have the same disc format and different operating systems (OS) for reading the information on the discs, CD-ROM discs do not work in CDI players, and CDI discs also do not play in CO-ROM players at all. it does not work. Therefore, the user has to have two players when playing a CDI disc and a CD-ROM disc.

Accordingly, it is an object of the present invention to provide a CDI / CD-ROM integrated player which plays back all compact discs regardless of CDI and CD-ROM recording formats using a PC in order to solve the above problems.

Another object of the present invention is to provide a method for reproducing all compact discs regardless of CDI and CD-ROM recording formats using a PC.

In order to achieve the above object, the CDI / CD-ROM integrated player according to the present invention loads a compact disc onto a deck to determine the recording format of the compact disc, and generates a predetermined control signal S-md according to the recording format of the compact disc. A CD drive to perform decoding;

A CDI card for controlling a signal processing path according to a recording format of a compact disc loaded in the CD drive, and performing signal processing for reproducing the compact disc; And

And a PC which inputs data of a mouse connected to a host computer to signal CD-ROM data according to the control signal S-md of the CD drive, and reproduces audio and video signals processed by the CDI card. It is characterized by.

In order to achieve the above another object, a method of playing a compact disc according to the present invention

A first step of loading a compact disc mounted in the CD drive to determine a recording format of the compact disc data and outputting a predetermined control signal S-md;

A second step of performing CDI data decoding if the data of the compact disc determined in the first step is CDI mode, and performing CD-ROM data decoding in the CD-ROM mode;

Transmitting the data decoded in the second step to a CDI card to perform signal processing in the CDI card according to the recording format of the compact disc, and to perform signal processing in the host computer in the CD-ROM mode. Step 3; And

In the third step, a fourth step of reproducing the data processed according to the mode of the compact disc into an audio signal and a video signal.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, and the same parts as in FIG. 1 will be denoted by the same reference numerals and description thereof will be omitted.

3 is a block diagram of a CDI / CD-ROM integrated player according to the present invention, and is largely comprised of a CD drive 30, a CDI card 40, and a host computer 50.

Here, the CD drive 30 includes a deck 11, a servo unit 12, a signal processing unit 13, a decoder 34, a buffer A, and a microcomputer 3 35, and the decoder 34 has a predetermined control signal. Decode the CDI data or the CD-ROM data in accordance with the S-md, the buffer A performs the interface between the CD drive 30 and the CDI card 40 in accordance with a predetermined control signal S-md, the microcomputer 3 ( 35 controls the components and generates a predetermined control signal S-md to control the decoder 34 and the buffer A. The method of distinguishing a CD-ROM from a CDI disk in the microcomputer 3 (35) of the CD drive 30 reads the contents of the TOC in the read-in area of the disk, and if the PSEC of the point A0 is '00'. If the CD-ROM is '10', it is determined as a CDI disk. In addition, if the standard ID of the volume structure of the volume label located at 2 seconds and 16 frames of the disk is 'CD-001', it is determined as a CD-ROM.

The CDI card 40 adjusts the timing of signals for interfacing with the CD drive 30 and the host computer 50, redirects data according to the CD-ROM mode or the CDI mode, and inputs the data stored in the buffer A. Buffer B, which outputs data to buffer A, buffer C, which outputs data input from the mouse to the MPU 20 when the data on the compact disc is in CDI mode, and still image playback when the data on the compact disc is in the CDI mode. VDSC 21 for decoding and system control, MPEG video decoder 22 for decoding MPEG video video, MPEG audio decoder 24 for decoding MPEG video audio, VDSC 21 and Memories M1 M2 M3, which provide the memory necessary for decoding, signal processing and manipulation of data in the MPEG video decoder 22 and the MPEG audio decoder 24, and the components 21, 22, 24, 43; , 45, M1, M2, M3, buffer A, buffer B, 68000 series MPU 20 for performing signal processing and transmitting the signal processed data to buffer B, MPU 20 and Micom 3 (35). An audio signal processor 43 for inputting the outputs of the buffer B and the MPEG audio decoder 24 and performing audio signal processing according to the control of the control unit and the host computer under the control of the MPU 20 and the microcomputer 3 35. And a video overlay 45 which inputs the outputs of the VDSC 21 and the MPEG video decoder 22, converts them into a format suitable for the monitor, and outputs them.

The host computer 50 processes the data input from the mouse to enable the interface with the user, inputs the data of the buffer B, performs signal processing according to the mode of the compact disc, and outputs it to the video overlay 45.

The CD drive 30 is not significantly different from the conventional CO-ROM drive 10 shown in FIG. 1, and the output form of the decoder 34 is only in the form of a CD-ROM under the control of the microcomputer 3 35. It may be a CDI format. The buffer B and the buffer C have a function for interfacing with the host computer 50 and the CDI card 40, so that the data inputted to the buffer B according to the control signal S-md of the microcomputer 3 35 is transferred to the host computer 50. It will determine whether or not to transmit to the CDI card 40.

If the compact disc mounted on the deck 11 is a CD-ROM disc, the microcomputer 3 35 inputs the output of the signal processing unit 13 to recognize the format of the compact disc and indicates a predetermined control signal S to indicate that the compact disc is in the CD-ROM mode. The decoder 34 outputs -md and the decoder 34 decodes the CD-ROM data corresponding to the control signal S-md output from the microcomputer 3 35 and outputs the buffer A. The buffer B inputs the data of the buffer A, changes the output direction of the data to the host computer 50 according to the control signal S-md, processes and manipulates the CD-ROM data in the host computer 50, and hosts the host computer 50. The mouse attached to the interface with the user. Among the final outputs processed, the video data is sent to the video overlay 45 to be reproduced in the monitor. In the case of audio data, the host computer 50 is sent to the audio signal processor 43 through the buffer B and output to the outside. In the CD-ROM mode, the rest of the CDI card except for the buffer B, the audio signal processor 43, and the video overlay 45 do not operate and the power is cut off by the control signal S-md output from the microcomputer 3 35. .

If the compact disk mounted on the deck 11 is a CDI disk, the microcomputer 3 35 inputs the output of the signal processor 13 to recognize the format of the compact disk and output a predetermined control signal S-md indicating that the compact disk is in the CDI mode. The decoder 34 decodes CDI data corresponding to the control signal S-md output from the microcomputer 3 35 and outputs the CDI data to the buffer A. The buffer B inputs the data of the buffer A and converts the output direction to the CDI card according to the control signal S-md, and outputs the respective signals from the VDSC 21 and the MPEG video / audio decoders 22 and 24 in the CDI card. Process. In the case of BASE CASE CDI, the video data is processed by the VDSC 21 and the video data is output. The CD-DA data or the ADPCM audio data is output from the decoder 34, and the digital filters of the audio signal processing unit 43 pass through buffers A and B. Output to the outside through D / A converter, low pass filter, etc. The video data output from the VDSC 21 and the MPEG video decoder 22 are each composed of n bits in the form of digital RGB signals, and are converted into a format suitable for a monitor by the video overlay 45 and output.

The data input from the mouse is transferred to the buffer C by the host computer 50 and processed by the MPU 20 in the CDI card to interface with the user.

CD-DA discs and CD-G discs do not use CD-ROM mode because they do not require an additional host computer to play in CDI mode. On other CD media, VIDEO-CD and PHOTO-CD can be played in either mode, so the mode is determined by the microcomputer 3 (35).

As described above, in the CDI / CD-ROM integrated player and its reproducing method according to the present invention, the CD drive generates a predetermined control signal S-md according to the recording format of the compact disc and performs decoding according to the control signal S-md. And a CDI card for changing the direction of the data according to a predetermined control signal S-md and processing the data of the CDI disk so that all compact disk media can be operated regardless of the CDI format and the CD-ROM format. to provide.

Claims (4)

In a device that plays back all compact discs regardless of CDI and CD-ROM recording formats using a PC, the compact disc is loaded onto a deck to determine the recording format of the compact disc, and predetermined control according to the recording format of the compact disc A CD drive generating a signal S-md and performing decoding; A CDI card for controlling a signal processing path according to a recording format of a compact disc loaded in the CD drive, and performing signal processing for reproducing the compact disc; And a PC which inputs data of a mouse connected to a host computer to signal-process CD-ROM data according to the control signal S-md of the CD drive, and reproduces audio and video signals processed by the CDI card. CDI / CD-ROM integrated player, characterized in that configured. The CD drive of claim 1, further comprising: a deck for loading a signal recorded on a compact disc, a servo unit for inputting an RF signal reflected from the compact disc, converting the signal into a digital signal, and performing various controls on variation of the disc; A signal processor for correcting an error by inputting a digital signal of the servo unit and decoding the input data; and decoding the CDI data according to a predetermined control signal S-md by inputting an output of the signal processor. A decoder for decoding data, a buffer A for storing the output of the decoder, and an output of the signal processor to determine whether the compact disc loaded in the deck is a CDI format or a CD-ROM format to determine the signal of the decoder; A CDI / CD-ROM integrated player comprising a micom that outputs a predetermined control signal S-md for controlling processing. The compact disc of claim 1, wherein the CDI card comprises: a buffer B for inputting the output of the CD drive to synchronize signals for an interface between a host computer and the CDI card and to redirect data according to the format of the compact disc; Is in CDI mode, the buffer C for inputting the data of the mouse, the VDSC for processing still images, the MPEG video decoder for decoding MPEG video, the MPEG audio decoder for decoding MPEG audio, the VDSC and the MPEG Memory (M1, M2, M3) for providing a video decoder and a memory for performing signal processing in the MPEG audio decoder, an audio signal processor for reproducing audio recorded on a compact disc, and a recording format of a compact disc. A video overlay that converts the output into a format suitable for the monitor and outputs the data of the buffers B and C. And a MPU configured to control the components by inputting. In a method of reproducing all compact discs regardless of CDI and CD-ROM recording formats using a PC, a compact disc mounted in a CD drive is loaded to determine the recording format of the compact disc data and a predetermined control signal S-md Outputting a first step; A second step of performing CDI data decoding if the data of the compact disc determined in the first step is CDI mode, and performing CD-ROM data decoding in the CD-ROM mode; Transmitting the data decoded in the second step to a CDI card to perform signal processing in the CDI card according to the recording format of the compact disc, and to perform signal processing in the host computer in the CD-ROM mode. Step 3; And a fourth step of reproducing the signal processed data according to the mode of the compact disc in the third step, as an audio signal and a video signal.