KR19980021419A - Personal computer MPEG and DVD player - Google Patents

Abstract

Disclosed is a PC and MPEG playback apparatus for reproducing MPEG standard data of a hard disk (HDD), a CD-ROM disk and data of a DVD in a personal computer (PC) environment through a single interface board. In the PC of the present invention, a microprocessor for reading data from an HDD, a CD-ROM disk, and a DVD, a demultiplexer for receiving data from the microprocessor through a bus system, determining the type, and outputting the data to a corresponding input / output port, and a corresponding input / output port. MPEG video decoder that decodes the video data stream output from the video according to MPEG standard, memory for storing the video data stream, the video data being decoded and the data being transmitted, the sub-picture decoder which decodes the DVD sub-picture data stream, and the HDD. MPEG and AC-3 audio decoders that decode CD-ROM audio data streams according to MPEG standards and DVD audio data streams according to AC-3 standards, and convert decoded video and sub-picture data into VGA signals. Video overlays and decoded audio data to be displayed on a PC monitor. It consists of a single interface board including a D / A converter that converts the call to a speaker. Accordingly, the present invention can play not only MPEG standard media in a PC environment but also DVD, and can simplify installation and use of the system through a single interface board that eliminates the overlapping configuration with the MPEG board, thereby activating MPEG related multimedia products. Provide effect.

Description

Personal computer MPEG and DVD player

An object of the present invention is to provide a single interface board for MPEG data recorded on a hard disk (HDD) or CD-ROM disk and data recorded on a digital video disc (DVD) in a personal computer (PC) environment. The present invention provides an MPEG and DVD player for a PC to be played using.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal computer that employs an MPEG board to play MPEG standard data recorded on a hard disk or CD-ROM disk. In particular, a personal computer capable of playing MPEG data and DVD data using a single interface board is provided. Relates to an MPEG and DVD player.

Recently, an MPEG board is installed in a personal computer (PC) environment, and a system for reproducing MPEG data recorded on a hard disk (HDD) or CD-ROM disk of a PC has been released. One example is shown in FIG.

1 is a block diagram showing an MPEG playback apparatus of a personal computer. As shown, the apparatus of FIG. 1 has a microprocessor 11 that controls general PCs and reads MPEG data from a hard disk or CD-ROM drive of a PC. In addition, an MPEG video decoder 13 for decoding the video data stream out of the read MPEG data according to the MPEG standard and an MPEG audio decoder 15 for decoding the audio data stream in accordance with the MPEG standard are provided. Here, the MPEG video decoder 13 and the MPEG audio decoder 15 form one MPEG board. The MPEG video decoder 13 is connected to a buffer 14 for storing a video data stream, a memory 14 for storing decoded data, and a data being transmitted. On the other hand, an input / output interface unit 12 for interfacing the MPEG video decoder 13 and the MPEG audio decoder 15 forming the microprocessor 11 of the PC with the MPEG board is provided. The MPEG video decoder 13 is further connected with a video overlay 16 for converting the decoded video data into a VGA signal output to a PC monitor, and the MPEG audio decoder 15 is capable of transmitting the decoded audio data to a speaker. A D / A converter 17 for converting into a form is configured to be connected.

In the conventional personal computer environment configured as described above, the microprocessor 11 of the PC outputs the MPEG data read through the hard disk or the CD-ROM drive to the input / output interface unit 12. The input / output interface unit 12 outputs the video data stream to the MPEG video decoder 13 from the input MPEG data, and outputs the audio data stream to the MPEG audio decoder 15. The MPEG video decoder 13 decodes the input video data stream according to the MPEG-1 or MPEG-2 standard and outputs the video data stream to the video overlay 16. Here, the memory 14 interconnected with the MPEG video decoder 13 uses approximately 1M of RAM, and buffers the input video data stream, stores the data being decoded, and stores the data being transmitted. Perform. The MPEG audio decoder 15 decodes the input audio data stream according to the MPEG-1 standard and outputs it to the D / A converter 17. The video overlay 16 overlays the decoded video data with the VGA signal to present on the PC monitor. Of course, the video data decoded without using the video overlay 16 may be directly output to the video input terminal of the TV and displayed on the TV screen. The D / A converter 17 converts the decoded audio data into an analog form, outputs it to the audio input terminal of the TV, and sends it to the speaker. In this way, MPEG data recorded on a PC hard disk or CD-ROM disk is reproduced in a personal computer environment.

However, in recent years, a DVD that provides a higher quality than a video of a CD, which is easy to handle and use like a CD, and can cope with multimedia has been developed and commercialized. Since DVD is digitally processed, it will not only be promising in the multimedia market in conjunction with computers, but will also be spotlighted as a visual media. The DVD records video data having the MPEG-2 standard, audio data having the AC-3 standard, sub-picture data and additional information for graphics such as subtitles and characters. However, in the MPEG playback apparatus of the conventional personal computer as described above, the playback operation of the data recorded on the DVD cannot be performed. Since DVD uses MPEG and AC-3 system, a separate DVD playback board is required to play DVD in PC environment. In addition, when a separate DVD playback board is provided, the MPEG board and the hardware configuration are overlapped and complicated, and production costs are increased. Thus, the present invention enables the reproduction of MPEG data and DVD data in a personal computer environment using a single interface board which eliminates the overlapping hardware configuration of the MPEG board and the DVD playback board.

1 is a block diagram showing a conventional MPEG playback apparatus of a personal computer;

2 is a block diagram showing an MPEG and DVD player of a personal computer according to a preferred embodiment of the present invention.

Explanation of symbols for main parts of the drawings

21 microprocessor 22 bus system

23: demultiplexer 24: MPEG video decoder

25: memory 26: sub-picture decoder

27: MPEG audio decoder 28: AC-3 audio decoder

29: video overlay 30: D / A converter

Accordingly, the MPEG and DVD playback apparatus of a personal computer according to the present invention is a device for reproducing MPEG data and DVD data in a personal computer environment, the microprocessor for reading the MPEG data and DVD data, and the microprocessor. And a single interface board for receiving the read data and determining the type thereof, and decoding the corresponding standard. The single interface board decodes the MPEG video data stream and the DVD video data stream according to MPEG standards. MPEG video decoder for playing back, MPEG audio decoder for decoding and playing the MPEG audio data stream according to MPEG standard, AC-3 audio decoder for decoding and playing the DVD audio data stream in accordance with AC-3 standard, and A sub-picture decoder for decoding and playing the DVD sub-picture data stream Characterized in having a.

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

2 is a block diagram showing an MPEG and DVD playback apparatus of a personal computer according to the present invention. As shown, the personal computer of the present invention has a microprocessor 21 for reading data from a hard disk or CD-ROM disk and a DVD, and a bus system 22 for transferring data read from the microprocessor 21. And a demultiplexer 23 for determining the type of data input through the bus system 22 and outputting the data to the corresponding input / output port. The demultiplexer 23 is connected to an MPEG video decoder 24 which decodes and reproduces a video data stream output from a corresponding input / output port according to an MPEG standard, and a sub-picture decoder 26 which decodes and reproduces a sub-picture data stream of a DVD. do. The demultiplexer 23 further includes an MPEG-3 audio decoder 27 for decoding and reproducing the audio data stream of the hard disk or the CD-ROM disk output from the corresponding input / output port according to the MPEG standard, and the AC-3 audio stream of the DVD. An AC-3 audio decoder 28 for decoding and reproducing according to the standard is connected. Here, the MPEG video decoder 24 and the MPEG audio decoder 27 use a conventional MPEG board as it is, and add an AC-3 audio decoder 28 and a sub-picture decoder 26 for DVD playback on the board. The bus system 22 and the demultiplexer 23 form a single interface board. The MPEG video decoder 24 is connected to a buffer 25 for storing a video data stream, a memory 25 for storing decoded data, and a data being transmitted. A video overlay 29 is connected between the MPEG video decoder 24 and the sub-picture decoder 26 to overlay the decoded video data and the sub-picture data with the VGA signal and present them on the monitor of the PC. The MPEG audio decoder 27 and the AC-3 audio decoder 28 are configured to connect a D / A converter 30 that converts the decoded audio data into an analog signal and outputs the same to a speaker.

The operation of the MPEG and DVD player of the personal computer according to the present invention configured as described above will be described in more detail.

First, the operation of playing a hard disk or a CD-ROM disk in a PC environment is the same as in FIG. 1. That is, the microprocessor 21 of the PC reads MPEG data from the hard disk or the CD-ROM disk and outputs the MPEG data to the demultiplexer 23 through the bus system 22. Here, the bus system 22 uses an industry standard architecture (ISA) bus, which is a standard interface, for the interface between the microprocessor 21 of the PC and the components forming a single interface board. The demultiplexer 23 deformats the input MPEG data stream, outputs the MPEG video stream to the MPEG video decoder 24, and outputs the MPEG audio stream to the MPEG audio decoder 27. The MPEG video decoder 24 and the MPEG audio decoder 27 decode and input the respective MPEG video streams and MPEG audio streams according to the MPEG-1 or MPEG-2 standard. The decoded video data is overlaid with the VGA signal through the video overlay 29 and displayed on the PC monitor. The decoded audio data is converted into an analog signal through the D / A converter 30 and sent to the speaker.

On the other hand, when playing a DVD, the micropresser 21 of the PC reads data from the DVD and outputs it to the demultiplexer 23 through the bus system 22. The demultiplexer 23 decodes the DVD stream, outputs the video stream to the MPEG video decoder 24, outputs the audio stream to the AC-3 audio decoder 28, and outputs the sub-picture stream to the sub-picture decoder 26. Output The MPEG video decoder 24 decodes the input MPEG video stream and outputs it to the video overlay 29. The AC-3 audio decoder 28 decodes the input audio stream according to the AC-3 standard, converts the input audio stream into an analog signal through the D / A converter 30, and sends the same to the speaker. The sub-picture decoder 26 decodes the input sub-picture stream and outputs it to the video overlay 29. The video overlay 29 overlays the decoded video data and the sub-picture data with the VGA signal and displays them on the PC monitor. In this manner, not only the MPEG data recorded on the PC hard disk or CD-ROM disk is reproduced in the personal computer environment, but also the DVD data is reproduced.

As described above, the present invention relates to a MPEG and DVD playback apparatus of a personal computer, and to a MPEG of a hard disk or a CD-ROM disk in a PC environment by using a single interface board which eliminates the overlapping configuration of the MPEG board and the DVD playback board. Not only does it play back data, it can also play back DVD streams.

Claims (6)

An apparatus for reproducing MPEG data and DVD data in a personal computer environment, A microprocessor for reading the MPEG data and DVD data; And It includes a single interface board for receiving the data read from the microprocessor to determine the type and decoding of the corresponding standard, The single interface board, An MPEG video decoder for decoding and playing the MPEG video data stream and the DVD video data stream according to MPEG standards; An MPEG audio decoder for decoding and reproducing the MPEG audio data stream according to an MPEG standard; An AC-3 audio decoder for decoding and reproducing the DVD audio data stream according to an AC-3 standard; And And a sub-picture decoder for decoding and reproducing the DVD sub-picture data stream. The method of claim 1, wherein the single interface board A bus system for transferring data read from the microprocessor; And And a demultiplexer for discriminating a type of data transmitted through the bus system and outputting the data to an input / output port connected to the decoder of a corresponding standard. The method of claim 1, wherein the single interface board is A video overlay converting the video data and the sub picture data decoded by the MPEG video decoder and the sub picture decoder into a VGA signal and presenting the same on a monitor; And And a D / A converter for converting the audio data decoded by the MPEG audio coder and the AC-3 audio coder into an analog signal and outputting the analog signal to a speaker. The personal computer as claimed in claim 1, wherein the MPEG video decoder of the single interface board is connected with a buffer for storing an input video data stream, a memory for decoding data, and a memory for transmitting data. MPEG and DVD player on computer. The MPEG and DVD player of claim 4, wherein the memory is a RAM. 3. The MPEG and DVD player apparatus according to claim 2, wherein the bus system uses an ISA bus.