KR970008517B1 - Method and apparatus for cd-i - Google Patents

Abstract

A method and apparatus which reproduce an interactive compact disc in a computer system are disclosed. In the method, in order to reproduce a CD-I in a computer, a PC-IC board and a computer system are booted. A CD-RTOS and DOS are interfaced with each other. A CD-ROM driver reads information which is stored in the CD-I disc and stores in a buffer of the PC. Data of the CD-I disc is transmitted to PC CD-I board so that the PC reproduces the data. The CD-I video signal processed in the PC CD-I board is converted in accord with feature of a video card and displayed on a monitor of the PC.

Description

Method and device for playing interactive compact discs on computer systems

1 is a block diagram of an interactive compact disc (CD-I) player.

2 is a diagram for explaining a method of playing a CD-I disc in a computer system according to the present invention.

3 is a block diagram of an apparatus for playing a CD-I disc in a computer system according to the present invention.

4 is a block diagram for explaining the bus interface shown in FIG.

FIG. 5 is a block diagram for explaining the overlay shown in FIG.

6 is a block diagram illustrating a software interface according to the present invention.

7 is a flowchart of a method for playing a CD-I disc in a computer system according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for reproducing an interactive compact disc (CD-I), and more particularly to a method and apparatus suitable for reproducing an interactive compact disc in a conventionally distributed personal computer (PC).

In general, a compact disc (CD) has many uses due to its high density, high capacity, and fast access time. Therefore, CD-DA (Digital Audio), CD-G (Graphic), CD-ROM (Read Only Memory), CD- Various discs using audio CDs such as I (Interactive), PHOTO-CD, etc. are widely used, and other products except CD-ROM and CD-I are simple players by independent microcomputer and decode information read from compact disc. In addition to video output, CD-ROM and CD-I require a host processor (PC) equipped with an operating system (OS) in addition to the above functions and perform various data operations.

The CD-ROM is a host interface that connects a CD-ROM drive, a computer peripheral device, a personal computer (PC), and a CD-ROM drive, and a host (HOST; PC) to play data. On the other hand, the CD-I player has its own part of the CD-ROM host, so you can connect your existing TV or monitor to the CD-I player without the need for a personal computer (PC). CD-I discs can be played. CD-ROMs act as computer peripherals and are primarily used for business purposes, and CD-I is a part of home multimedia devices. Media using compact discs are generally intended to operate in CD-ROM and CD-I players, since the media can only require simple decoders that do not require an operating system. However, because CD-ROM discs and CD-I discs do not have the same disc format and different operating systems (OS) for reading the disc's information, CD-ROM discs do not work in CD-I players. It does not work at all on a CD-ROM player. Therefore, there is a problem that a user must have two players when playing a CD-I disc and a CD-ROM disc.

Accordingly, an object of the present invention is to provide a method for reproducing all the discs that can be played in a CD-ROM player and a CD-I player on a PC in order to solve the above problems.

Another object of the present invention is to provide an apparatus suitable for realizing a method for playing a CD-I disc in the PC.

In order to achieve the above object, the present invention provides a method for playing a CD-I disc in a computer system (PC) equipped with a CD-ROM drive and extending a PC CD-I board by a slot. Booting a PC CD-I board and a computer system slotted in the computer system to play a disk on the PC; A second step of mutually interfacing a CD-RTOS, an operating system for playing the CD-I disk, and a DOS, a PC operating system; A third step of reading, by the CD-ROM drive connected to the PC, the information loaded on the CD-I disc and storing the information in the buffer of the PC; A fourth step of transmitting the data of the CD-I disk to the PC CD-I board and performing signal processing for playback on the PC; And a fifth step of converting the CD-I video signal processed by the PC CD-I board according to the characteristics of the video card mounted in the PC to display on the monitor of the PC.

In order to achieve the above another object, the present invention provides a device for playing a CD-I disc in a computer system (PC) equipped with a CD-ROM drive and extending a PC CD-I board by a slot. A microprocessor that executes software of a CD-RTOS, an operating system for playing I disks, and an application program for playing a compact disk, and controls signal flow on a PC CD-I board; CD-RTOS, an operating system of the CD-I disk, a system booting program, a system initialization program, a device driving program, a CD-I system software such as an operation program, and the like are stored, and the program is controlled according to the control of the microprocessor. A first memory to be executed; Under the control of the microprocessor, predetermined data can be read and written for data processing during execution of an application program, and data files such as CD-I system parameters and user files can be read and stored so that the user can store or refer to the predetermined data. A second memory for storing; A real time clock generator for generating a predetermined clock required for the system to normally operate the system of the PC CD-I board under the control of the microprocessor; Located between the PC and the PC CD-I board to interface a predetermined command and the corresponding state, and receive the data read from the CD-I disk and the data by the input device, the program of the PC and the PC CD-I board A bus interface for interfacing a program of the system, a system memory for storing application programs and audio / video data read from the CD-I disk, and providing a memory required when various programs are executed; A video system controller which controls the microprocessor to access the system memory, inputs and decodes video data stored in the system memory, and outputs a digital RGB signal and a synchronization signal; An ADPCM decoder which decodes the ADPCM audio data and reproduces the ADPCM audio in real time by inputting the ADPCM audio data stored in the system memory; An MPEG1 audio / video decoder for inputting a synchronization signal of the video system controller and an MPEG1 audio / video signal stored in the system memory to decode and output an MPEG1 audio signal, and decoding an MPEG1 video signal to output a digital RGB signal and a synchronization signal. ; And an overlay for converting and displaying the digital RGB signal according to the monitor characteristics of the PC by inputting a digital RGB signal and a video synchronization signal output from the PC CD-I board and a signal of a video card characteristic connector of the PC. Characterized in that.

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

1 is a block diagram of a CD-I player, in which a microprocessor (MPU) 100 executes software such as a CD-RTOS, an operating system for playing a CD-I disc, and an application program for playing a compact disc. Control signal flow as part of the process.

The EPROM 101 stores CD-RTOS, which is an operating system of a CD-I disk, a system boot program, a system initialization program, a device driving program, and CD-I system software such as an operation program to control the microprocessor 100. The program is executed accordingly.

The NVRAM 102 can read and write predetermined data for data processing during the execution of an application under the control of the microprocessor 100, and the CD-I system parameters and the user so that the user can store or refer to the predetermined data. Store data files such as files.

The real time clock generator (RTG) 103 generates a predetermined clock necessary for the system to normally operate the system of the PC CD-I B / D under the control of the microprocessor 100.

The CD drive 104 has the same function as a conventional CD player, and has an automatic control circuit for reading data from a CD-I disc such as pickup control, focusing control and tracking control, a spindle motor driving circuit, and a disc mounted in the drive. And a tray driving circuit, and reads the data of the disc in sector units according to the control signal of the CD control microcomputer 107 and transmits the data to the CD interface controller 105. FIG.

The CD interface controller 105 stores the data read from the disk in the CDIC buffer 106 sector by sector and decodes the data sector by sector in the CD-I sector decoder to separate the header and subheader and correct the data error. Transfer to the system memory 108 under the control of (100). In addition, there is a function for interfacing the microprocessor 100 and the CD-controlled microcomputer 107 to communicate commands and their corresponding states, and to mix audio signals in the ADPCM audio decoder and the audio processor (AUDIO PROCESSING UNIT). The audio signal is attenuated, and the ADPCM audio signal is decoded by the ADPCM audio decoder and output as an analog signal from the DAC1 113. Data of the CD read from the CD drive 104 is continuously applied to the CDIC buffer 106 in real time under the control of the CD interface controller 105.

The CDIC buffer 106 simultaneously stores the data being applied, the data being decoded, and the data being transmitted at the same time and provides the memory necessary for the ADPCM audio decoder of the CD interface controller 105 to decode the ADPCM data.

The CD control microcomputer 107 has a function of a user interface that receives a signal from an input device and delivers it to the microprocessor 100, and the CD drive 104 can read a desired data by finding a specific position of the disc in the CD drive 104. Control and exchange instructions / states with the microprocessor 100.

The system memory 108 stores application programs and audio / video data read from CD-I discs, provides memory required when various programs are executed, and is managed by the system controller.

The B / C video controller & decoder 109 controls the microprocessor 100 to access the system memory 108 and inputs video data stored in the system memory 108 to decode B / C video data and digitally. An RGB signal is output to the TDAC 112, and a video synchronization signal is output to synchronize video image data of the analog video output terminal.

MPEG1 audio / video controller & decoder 110 decodes MPEG1 video and audio based on MPEG1 specification and controls the interface with microprocessor 100, MPEG1 audio is decoded and output to DAC2 114 as a 16-bit PCM signal, MPEG1 video is decoded and output to the TDA C 112 as a digital RGB signal.

The MPEG1 decoder buffer 111 is a memory used by an MPEG1 decoder to decode MPEG data, and the TDAC 112 inputs an analog RGB signal output from a B / C video decoder and a digital RGB signal output from an MPEG1 decoder. The DAC1 113 and the DAC2 114 convert the 16-bit PCM audio into analog audio.

2 is a flowchart for explaining a method of playing a CD-I disc in a computer system according to the present invention, which executes a program for initializing peripheral circuits and various variables and displaying on a screen so that a user can control an operation menu. And step 210 of booting the PC CD-I board (B / D) and the PC so that the data of the CD-I disk can be played on the PC by residing in the translation program RAM, and CD, which is an operating system for playing the CD-I disk. Step 220 of interfacing RTOS with DOS, which is a PC operating system, step 230 of reading information stored on the CD-I disk by a CD-ROM drive connected to the PC and storing the information on the CD-I disk in a buffer of the PC; Step 240 of transmitting the information of the CD-I disk to the PC CD-I B / D, and processing the signal so that the information of the CD-I disk can be reproduced in the PC; and the processing of the PC CD-I B / D. CD-I video signals The conversion according to the characteristics of the VGA-based PC 250 comprises a first step of displaying on the monitor of the PC.

3 is a block diagram of an apparatus for reproducing a CD-I disc in a computer system according to the present invention, in which parts identical to those in FIG. 1 are denoted by the same reference numerals, and detailed descriptions thereof will be omitted.

The PC CD-I B / D, which processes CD-I disc data to play CD-I discs in a PC, includes a CD drive 104 and a CD drive in the conventional CD-I player shown in FIG. The CD control micom 107 and CDIC buffer 106 and CD interface controller 105 for interfacing with the 104 and the TDAC 112 for outputting video signals to the television are eliminated, and the PC CD-I B / D A bus interface 304 for interfacing the PC system and an overlay (Over Lay) 305 for converting the video signal of the PC CD-I B / D and outputting the VGA signal to the VGA monitor to match the characteristics of the PC graphics card are added. .

Here, the microprocessor 100 executes the system software and controls the signal flow on the PC CD-I B / D, and the CD-I system software is stored in the memory (EPROM) 101 to control the microprocessor 100. Therefore, a predetermined program is executed, and the memory (NVRAM) 102 stores CD-I system parameters, user files, and the like under the control of the microprocessor 100.

The real time clock generator (RTG) 103 generates a predetermined clock required by the system under the control of the microprocessor 100, and the system memory 108 is managed by the video system controller.

The ADPCM decoder 301 inputs ADPCM audio data stored in the system memory 108 under the control of the microprocessor 100 to reproduce ADPCM audio data.

The video system controller 302 controls the microprocessor 100 to access the system memory 108 and inputs video data stored in the system memory 108 to output digital RGB signals and synchronization signals.

The MPEG1 audio / video decoder 303 inputs MPEG1 audio / video data stored in the system memory 108 under the control of the microprocessor 100 to output an audio signal, a digital RGB signal, and a video synchronization signal.

The bus interface 304 is located between a PC equipped with a CD-ROM drive (not shown) and a PC CD-I B / D to provide a connection between a program on the PC and a program on the PC CD-I B / D. It connects PC and PC CD-I B / D so that interface can be used to interface commands and corresponding status, and transmits and receives CD-I disk data read from CD-ROM drive and data by mouse or keyboard.

The overlay 305 inputs the digital RGB signal output from the video system controller 302 and the digital RGB signal output from the MPEG1 audio / video decoder 303 and the video synchronization signal to match the digital RGB signal of the PC. Convert and display

4 is a block diagram for explaining the bus interface 304 shown in FIG. 3, in which data read from a CD-I disc is transferred to a PC buffer and transferred to the PC buffer shown in FIG. It is delivered to the system memory 108 of the I B / D, and the command at the device driver of the PC controls the PC CD-I B / D through the control register 402. The status of the PC CD-I B / D is recorded in the status register 403. The command between the PC and the PC CD-I B / D and the corresponding status are read by reading the value of the status register 403 from the device driver of the PC. The resists are controlled by the interface control circuit 404.

FIG. 5 is a block diagram illustrating the overlay 305 shown in FIG. 3, which includes a PC control signal, a VGA characteristic connector output from a VGA controller (not shown), and a PC CD-I B / The digital RGB signal and the video synchronizing signal output from D are input to the overlay control circuit 501 to convert the CD-I video data according to the VGA characteristic, and the work memory used by the overlay control circuit 501 in the video RAM 502. To provide. The video mixer 504 inputs a signal converted according to VGA characteristics and an output of a CLUT (Color Look Up Table) 503 to mix the video signal and output the mixed video signal to the D / A converter 505. In 505, the digital RGB signal is converted into an analog RGB signal and output to the VGA card 506.

6 is a block diagram illustrating a software interface according to the present invention, where A block shows a system and an application program executed on a PC CD-I B / D, and B block shows a system and an application program executed on a PC. It is shown.

In the A block, the application program 600 is a program stored in a CD-I disk, and is executed on the microprocessor 100 shown in FIG. 3 and the CD-RTOS operating system of the CD-I. The KERNEL 610 and NVRAMM ( 612, MPFM 614, UCM 616, and CDFM 618 are operating systems constituting a CD-RTOS, and the operating systems each correspond to a device driver (D / D), the device driver D / D has system software for controlling a device corresponding to each device driver D / D.

NVRAMM 612 is an operating system for reading and writing data to NVRAM 102 shown in FIG. 3, and the D / D of NMRAMM has system software for reading and writing data to NVRAM 102, and moving picture file manager. 614 is an operating system for processing MPEG1 moving picture video and audio, and the D / D of the MPFM 614 has system software for controlling the MPEG1 audio / video decoder 303 shown in FIG. The User Communication Manager (UCM) 616 consists of a video D / D and a mouse D / D. The video D / D has a system software for controlling the video system controller 302 and the decoder shown in FIG. D has system software to control the mouse. The CDFM (Compact Disc File Manager) 618 is an operating system for controlling a CD drive, and the CDFM D / D controls the hardware to execute commands required by the application program 600. The bus interface 304 shown in FIG. It interfaces with Run-CDI of B block through.

B-block MS-DOS (652) is an operating system running on a PC, MSCDEX (MS-dos CD Extension; 654) is an operating system that converts the file structure of another disk into MS-DOS file structure that can be recognized by the PC It is system software that creates an extension so that the operating system can read different disks.

The CD-ROM D / D 656 has a system program that executes the commands required by the MS-DOS 652, and the CD-ROM interface card 658 is designed according to the connection method of a PC peripheral device and is a CD-ROM drive. (659) and PC.

Run-CDI 650 must run CD-I disk read from CD-ROM drive 659 in order to run on PC, and input command of A block CDFM D / D through bus interface 304. MS-DOS 652 accesses the CD-ROM drive 659 via MSCDEX 654 to read CD-I data from the CD-ROM drive 659 at double speed and store it in a buffer on the PC. Transfer data to PC CD-I B / D at 75Hz cycle (1x speed). It also acts as a link between CD-RTOS and MS-DOS, interfacing commands and corresponding states between the CDFM D / D in the A block and the CD-ROM drive 659 in the B block, and providing a buffer on the PC. It controls and initializes and controls the overlay 305 shown in FIG. 3, and converts the data received from the mouse connected to the PC into the CD-I mouse data format and then transmits the data to the PC CD-I B / D. .

7 is a flowchart of a PC CD-I B / D operation for playing a CD-I disc in a PC according to the present invention. When the PC is powered up to play a CD-I disc, the PC and the PC CD-I B / D is booted (step 700), MSCDEX resides in the RAM of the PC, and the peripheral circuit and various parameters are initialized by the system booting of the PC CD-I B / D.

When the Run-CDI 650 is executed on the PC PROMPT (step 701), the initialization of the Run-CDI program itself (step 702) and the initialization of the overlay 305 (step 703) are performed, and the CD-ROM drive ( 659 informs the PC CD-I B / D that it is ready to receive the command.

Upon receipt of the command reception of the CD-ROM drive 659, the PC CD-I B / D requests the CD-ROM drive status to determine whether there is a CD-I disk in the CD-ROM drive 659. In operation 704, it is determined whether there is a CD-I disk in the CD-ROM drive (operation 705). If there is a CD-I disk, TOC (Table Of Contents) data and a disc label are read (operation 706).

When the user inputs an execution command using the input device (MOUSE) (step 707), the application program 600 is read and executed (step 708) and the CD-I disc is played according to the function provided by the application (step 708). Step 709).

As described above, the method and apparatus for reproducing a CD-I disc in a computer system according to the present invention extend a PC CD-I B / D, which can process data of a CD-I disc and display it on a PC monitor, by a slot. This provides the effect of playing all the discs that can be played on the CD-I player as well as the CD-ROM on the PC.

Claims (3)

A method for playing a CD-I disc in a computer system (PC) equipped with a CD-ROM drive and extending a PC CD-I board by a slot, the method for playing the CD-I disc in the PC. A first step of booting the PC CD-I board and the computer system slotted into the computer system; A second step of mutually interfacing a CD-RTOS, an operating system for playing the CD-I disk, and a DOS, a PC operating system; A third step of reading, by the CD-ROM drive connected to the PC, the information loaded on the CD-I disc and storing the information in the buffer of the PC; A fourth step of transmitting the data of the CD-I disk to the PC CD-I board and performing signal processing for playback on the PC; And a fifth step of converting the CD-I video signal processed by the PC CD-I board according to the characteristics of the video card mounted in the PC to display on the monitor of the PC. How to play a compact disc. The PC CD of claim 1, wherein the data of the CD-I disk is read at twice the speed of the CD-ROM drive and stored in a buffer allocated to a PC, and the data of the CD-I disk is signal-processed at a bus interface. -I A method of playing an interactive compact disc in a computer system, characterized in that it transmits at 75 Hz intervals to the board. An apparatus for playing a CD-I disk in a computer system (PC), in which a CD-ROM drive is mounted and the PC CD-I board is extended by a slot, wherein the CD-I disk is an operating system for playing the CD-I disk. A microprocessor that executes software of an application program that plays RTOS and compact discs and controls signal flow on a PC CD-I board; CD-RTOS, an operating system of the CD-I disk, a system boot program, a system initialization program, a device driving program, an operation program, and other CD-I system software are stored, and the program is controlled by the microprocessor. A first memory to be executed; Under the control of the microprocessor, predetermined data can be read and written for data processing during execution of an application program, and data files such as CD-I system parameters and user files can be read and stored so that the user can store or refer to the predetermined data. A second memory for storing; A real time clock generator for generating a predetermined clock required for the system to normally operate the system of the PC CD-I board under the control of the microprocessor; Located between the PC and the PC CD-I board to interface a predetermined command and the corresponding state, and receive the data read from the CD-I disk and the data by the input device, the program of the PC and the PC CD-I board A bus interface for interfacing a program of the system, a system memory for storing application programs and audio / video data read from the CD-I disk, and providing a memory required when various programs are executed; A video system controller which controls the microprocessor to access the system memory, inputs and decodes video data stored in the system memory, and outputs a digital RGB signal and a synchronization signal; An ADPCM decoder which decodes the ADPCM audio data and reproduces the ADPCM audio in real time by inputting the ADPCM audio data stored in the system memory; An MPEG1 audio / video decoder configured to input a synchronization signal of the video system controller and an MPEG1 audio / video signal stored in the system memory to decode and output an MPEG1 audio signal, and to decode the MPEG1 video signal to output a digital RGB signal and a synchronization signal; And an overlay for converting and displaying the digital RGB signal according to the monitor characteristics of the PC by inputting a digital RGB signal and a video synchronization signal output from the PC CD-I board and a signal of a video card characteristic connector of the PC. And an interactive compact disc in a computer system.