KR20010069858A - System and method for playing multimedia file - Google Patents

Abstract

PURPOSE: A system and a method for performing a playback of a multimedia file are provided to store a high capacity multimedia file by using a CD-ROM/DVD-ROM disk as a multimedia file storage medium, and to increase satisfaction by performing playback of various multimedia files through a multi codec driver, and to add a new codec driver by upgrading the multi codec driver because the multi codec driver is a software. CONSTITUTION: A system for performing a playback of a multimedia file includes a loader part(200), a control part(210), a buffer(220), an A/D converter(230), a D/A converter(240), a key pad(250), a display part(260), a microphone(270), and a speaker(280). The loader part(200) reads data stored at a CD-ROM/DVD-ROM disk, and outputs the data to the control part(210). The control part(210) stores the data at the buffer(220), or outputs the data to the speaker(280) or the display part(260) through the D/A converter(240). At this time, the control part(210) performs a multi-tasking. For the multi-tasking, the control part(210) includes a file system module(211), a codec module(212), and a user interface module(213). The file system module(211) extracts a multimedia file from the data, and manages the data. The codec module(212) decodes the multimedia file, and recovers video data and audio data from the decoded multimedia file. At this time, the codec module(212) includes plural codec drivers in order to decode various multimedia files. The user interface module(213) reads the multimedia file from the file system module(211) according to a selection signal inputted through the key pad(250), and outputs data decoded by the codec module(212) to the display part(260) or the D/A converter(240).

Description

SYSTEM AND METHOD FOR PLAYING MULTIMEDIA FILE}

The present invention relates to a multimedia file reproducing system and method, and more particularly, to a multimedia file reproducing system and method for efficiently reproducing various types of large-capacity multimedia files.

Generally, multimedia files include audio files, video files, and graphic files. The multimedia file is downloaded after being downloaded through a communication terminal connected to the Internet. A representative example of the digital music file is an MP3 file.

An MP3 file is a file obtained by compressing and encoding audio information into a computer file by the MPEG LAYER3 method. This file is mainly used as a music file for computers, but recently news or lecture contents are often served as MP3 files.

MP3 files can be played by a dedicated audio playback device, that is, an MP3 player, which is connected to a computer capable of internet communication. The MP3 player downloads MP3 files from the Internet through a computer and stores them in an internal semiconductor memory. Play the saved MP3 file.

Thus, the MP3 player according to the prior art will be described with reference to the accompanying drawings.

1 is a block diagram illustrating an internal configuration of an MP3 player according to the related art.

Referring to FIG. 1, the MP3 player according to the related art includes a flash memory 100, an MP3 codec 102, an analog / digital converter 104, a D / A converter 106, and a controller. 108, a keypad 110, a display 112, a power supply 114, a microphone 116, and a speaker 118.

The flash memory 100 stores a downloaded MP3 file and a voice data file encoded by the MP3 codec 102 through a computer (not shown) capable of internet communication.

The A / D converter 104 converts an analog audio signal input through the microphone 116 into a digital signal under the control of the controller 108 and outputs the digital signal to the MP3 codec 102.

The MP3 codec 102 decompresses an MP3 file of the flash memory 100 input through the controller 108 in the MP3 manner and decodes the MP3 file into audio data in the form of a bit stream. The MP3 codec 102 also encodes a digitally converted speech signal input from the A / D converter 104. In this case, the controller 108 stores the encoded digital voice signal in the flash memory 100.

The D / A converter 106 converts the decoded voice signal input from the MP3 codec 102 into an analog voice signal under the control of the controller 108 and outputs the analog voice signal to the speaker 118.

The display 112 displays characters or graphics under the control of the controller 108, and the keypad 110 is configured with a plurality of operation keys for generating an operation signal for the operation of the MP3 player. The operation signal generated by the operation key of is outputted to the control unit 108.

The power supply unit 114 provides operation power for each MP3 player operation through the control unit 108.

The prior art, which is configured and operated as described above, uses a flash memory as a storage medium for storing MP3 files. However, the flash memory has a low storage capacity and thus cannot store a large multimedia file.

In addition, the prior art is a device for reproducing only MP3 files of various multimedia files, there is a problem that can not play various audio files, graphics files or video files other than MP3 files.

Accordingly, the present invention has been made to solve the problems of the prior art, and a multimedia playback apparatus and method for using a CD-ROM or DVD-ROM disk as a multimedia file storage medium. The purpose is to provide.

Another object of the present invention is to provide an apparatus and method for playing multimedia using a multi codec system for playing various types of multimedia files.

1 is an internal block diagram of an MP3 player according to the prior art.

2 is a schematic diagram of a multimedia playback apparatus according to the present invention;

3 is a detailed configuration diagram of the loader.

4 is a detailed configuration diagram of a file system module.

5 is a detailed configuration diagram of a codec module.

6 is a detailed configuration diagram of a user interface module.

7 is a flow chart for performing multimedia file playback according to the present invention.

8 is a flow chart for performing first order decoding in accordance with the present invention.

9 is a flowchart for performing secondary decoding of the present invention.

<Description of the symbols for the main parts of the drawings>

200: loader unit 210: control unit

220: buffer 230: A / D converter

240: D / A converter 250: Key pad

260: display unit 270: microphone

280: Speaker

According to an aspect of the present invention, there is provided a multimedia file reproducing apparatus, comprising: a loader for reading multimedia file data stored on a CD-ROM / DVD-ROM disc, and a buffer for temporarily storing multimedia file data read by the loader And a file system module that controls reading of the multimedia file data of the loader unit, extracts and manages a part or all of the multimedia file from the read multimedia file data, and decodes the codec driver corresponding to the extension of the multimedia file temporarily stored in the buffer. The module-codec module includes a plurality of codec drivers for decoding a plurality of multimedia files, and includes a control unit including a user interface module for outputting video data or audio data of the decoded multimedia file to a video or audio output device. But, the control CPU is a RISC type, there are the features to provide a multimedia file playback apparatus, it characterized in that the file system module, a codec module, a user interface module may be configured as a program for performing an operation.

Here, the multimedia file includes an audio file, a graphic file, or a video file having a plurality of types of extensions.

The file system module of the present invention includes a recording format recognizer for recognizing a recording format of multimedia file data stored on a CD-ROM / DVD-ROM disc, wherein the record format recognizer includes an ISO 9660 recognizer and a UDF recognizer. A buffer management unit for managing a buffer, a loader control unit for controlling a reading position of multimedia file data stored on a CD-ROM / DVD-ROM disc, a CD-ROM controlling a first decoding of multimedia file data read by the loader unit Other features include the / DVD-ROM decoding control.

The codec module of the present invention includes at least an MP3 codec driver, a WMA codec driver, an AAC codec driver, an MPEG codec driver, or an ASF codec driver according to the extension type of a multimedia file temporarily stored in a buffer, and the codec module is provided through a software upgrade. It is characterized by adding a codec driver for decoding multimedia files.

The user interface module of the present invention includes a key input unit for receiving an operation signal from a user, a display control unit for controlling video data output of a multimedia file decoded by a codec module, and an audio data output of a multimedia file decoded by a codec module. An audio input / output controller and a playback mode manager for outputting a control signal for controlling a playback mode of a multimedia file to a file system module are provided.

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

2 is a schematic configuration diagram of a multimedia playback apparatus according to the present invention, FIG. 3 is a detailed configuration diagram of a loader, and FIG. 4 is a detailed configuration diagram of a file system module. 5 is a detailed configuration diagram of the codec module, and FIG. 6 is a detailed configuration diagram of the user interface module.

Referring to FIG. 2, the multimedia player according to the present invention includes a loader unit 200, a controller 210, a buffer 220, an A / D converter 230, and a D / A converter 240. ), A keypad 250, a display unit 260, a microphone 270, and a speaker 280. At this time, the control unit 210 is configured with a reduced instruction set computer (RISC) type CPU.

In general, a CPU can be classified into a classical CPU type CISC (Complex Instruction Set Computer) and its relative concept, a RISC type CPU.

Here, the RISC type CPU simplifies instructions and standardizes the form, reducing the time required for the processor to classify instructions, dividing complex memory-related instructions that require multiple clocks into simple instructions, and reinforcing resources within the processor to remove all instructions. The key technique is to process within one clock if possible at the same time.

The loader 200 reads data stored in a CD-ROM / DVD-ROM disk (not shown) and outputs the data to the controller 210.

Here, as shown in FIG. 3, the loader unit 200 includes an optical pickup 302, an RF (Radio Frequency) amplifier 304, a digital signal processor 306, a CD / DVD ROM decoder 308, and a motor driver. 310.

The controller 210 stores the data input from the loader 200 in the buffer 220, outputs the data to the speaker 280 through the D / A converter 240, or outputs the data through the display 260.

In this case, the controller 210 is configured in software to perform multi-tasking.

At this time, if the software for multi-tasking is classified according to the operation type, the control unit 210 is a file system module 211, codec module 212, user interface module 213, audio post-processing module 214 and the game Engine module 215.

The file system module 211 extracts and manages a multimedia file from data read from a CD-ROM / DVD-ROM disk. As shown in FIG. 4, the file system module 211 includes an ISO 9660 recognizing unit 400, a UDF recognizing unit 402, a buffer managing unit 404, and a loader control unit 406.

The codec module 212 is configured to decode the multimedia file extracted by the file system module 211 to restore the video data and the audio data. In this case, the codec module 212 includes a plurality of codec drivers for decoding multimedia files of various formats extracted from the file system module 211.

That is, as illustrated in FIG. 5, the codec module 212 may use at least the MP3 codec driver 500 and the WMA () to decode and output the multimedia file read from the file system module 211 to the user interface module 213. Window Meida Audio codec driver 502, Moving Picture Experts Group (MPEG) codec driver 504, Advanced Audio Coding (AAC) codec driver 506, and Advanced Streaming Format (ASF) codec driver 508.

The user interface module 213 reads a file from the file system module 211 according to a selection signal input through the keypad 250 and displays the data decoded by the codec module 212 by the display unit 260 or D /. Configured to output to the A converter 240.

Here, as illustrated in FIG. 6, the user interface module 213 may include a key input unit 600 for receiving a key signal input from the keypad 250 and a display control unit 602 for controlling the display unit 260. , An audio input / output controller 604 for controlling the A / D converter 230 and the D / A converter 240, and a playback mode manager 606 for controlling a playback mode of the multimedia file.

The audio post processing module 214 is a component for applying various types of acoustic effects to the audio signal decoded by the codec module 212, and the game engine module 215 reads from a CD-ROM / DVD-ROM disc. It is a configuration for executing a game according to the game data entered.

The keypad 250 includes a plurality of function keys for generating an operation signal of a multimedia file reproducing apparatus, such as a power key, a playback mode selection key, and a sound effect operation key, and the display unit 260 includes an LCD panel.

Here, the apparatus for reproducing a multimedia file of the present invention may further include a program memory (not shown) for storing a schedule program required for initialization of the controller 210.

In addition, the multimedia file player according to the present invention is configured in a portable form.

The operation of the multimedia file playing apparatus according to the present invention configured as described above will be described.

First, the optical pickup 302 of the loader 200 reads various types of multimedia file data stored in the CD-ROM / DVD-ROM disk 300. At this time, the control unit 210 recognizes the data recording format of the CD-ROM / DVD-ROM disk 300 by the ISO 9660 recognition unit 400 and the UDF recognition unit 402 of the file system module 211, the optical pickup Control to enable multimedia file data reading by 302 is performed.

Currently, CD / DVD-ROM discs record data in two formats, two of which are ISO 9660 and UDF (Universal Disk Format).

The standard CD-R (Recordable CD) format consists of ISO 9660 format, and mainly uses the Romeo / Joliet format, which has been extended to support long file names in the ISO 9660 format.

In addition, Packet-Write, which is frequently used for CD-RW (CD-Rewritable) discs, mainly uses a recording format in the UDF format. Packet-Write method uses a CD-RW drive as a hard disk. It is a technology that allows you to record and delete data in file units as easily as).

Here, the CD-ROM / DVD-ROM disk 300 stores multimedia files such as digital audio files and video files downloaded through a computer (not shown) capable of internet communication.

The CD-ROM / DVD-ROM disk 300 is a recording medium having a large storage capacity, and records various types of multimedia file data.

Here, the multimedia file is largely an audio file (generally, a file having an extension of AU (AUdio), WAV (WAVe), MP3, WMA (Window Mecia Audio), AAC (Advanced Audio Coding), etc.), graphic file (generally BMP). (Files with extensions such as BitMaP), Graphics InterchangeFormat (GIF), Joint Picture Expert Group (JPG), Tag Image File format (TIF), video files (usually AVI (Audio Video Interactive), MPEG (Motion Picture Expert) Group), files having extensions such as QT (Quick Time), RAM, etc.).

The RF amplifier 304 converts the multimedia file data read through the optical pickup 302 into a high frequency signal (RF signal) and outputs it, and the digital signal processor 306 reproduces and processes the high frequency converted signal into a digital signal. Output to the CD / DVD ROM decoder 308.

The CD / DVD ROM decoder 308 corrects an error of the digital signal processed by the reproduction signal, descrambles the data in which the error is corrected, and outputs it to the control unit 210. At this time, the CD / DVD ROM decoder 308 is controlled by the loader control unit 406 of the file system module 211 in the control unit 210.

Here, the multimedia file data recorded on the CD-ROM / DVD-ROM disk 300 is encrypted, that is, scrambling.

The motor driver 310 is controlled by the loader control unit 406 of the file system module 211 to vary the rotational speed of the CD-ROM / DVD-ROM disk 300 and the data reading position of the optical pickup 302.

The buffer manager 404 of the file system module 211 controls to temporarily store the multimedia signal processed by the loader 200 in the buffer 220.

In general, a CD-ROM / DVD-ROM is referred to as a low speed storage device because of a slow access speed for reading or writing data compared to a RAM or flash memory. In addition, there is a large difference in access time depending on the location where data is stored in the low speed storage device or the physical state of the stored area. In severe cases, physical damage can result in unreadable data.

Therefore, in a system that reads and processes data in such a low speed memory device, a predetermined amount of data is read in advance from the low speed memory device and stored in a memory buffer 220 having a predetermined size. The buffer consists of semiconductor memory, such as RAM, which is accessed through the internal bus of the computer, providing much faster data access than secondary storage devices such as hard disks.

Therefore, the need for accessing the buffer 220 directly without the need to access the low speed storage device whenever necessary increases the data reproduction speed, and solves the problem that the data processing speed due to the access time difference is not constant.

Here, the method of managing the buffer 220 is based on a method of managing an annular queue for a low speed storage device (application number 10-2000-0052546) filed September 15, 2000 in Korea.

The key input unit 600 of the user interface module 213 receives a multimedia file reproduction signal input through the keypad 250, and outputs the input multimedia file reproduction signal to the buffer manager 404.

The buffer manager 404 outputs a multimedia file corresponding to the multimedia file playing signal among the files stored in the buffer 220 to the codec module 212.

The codec module 212 operates a corresponding driver according to the extension of the various types of multimedia files described above.

For example, in the case of an MP3 file in the form of '* .mp3', the MP3 codec driver 500 and the WMA codec driver 502 in the case of a Windows media file in the form of '* .wma', the video file in the form of '* .mpg' In this case, the MPEG codec driver 504, the AAC codec driver 506 in the case of a multimedia file of '* .aac' type, and the ASF codec driver 508 in the case of a multimedia file of '* .asf' type, are operated.

The codec module 212 operates each driver according to the multimedia file, decodes the multimedia file, restores the multimedia file to audio data or video data, and outputs the same to the user interface module 213.

The display controller 602 of the user interface module 213 controls to output video data input from the codec module 212 through the display unit 260.

In addition, the audio input / output control unit 604 of the user interface module 213 outputs audio data input from the codec module 212 to the D / A converter 240, and the D / A converter 240 inputs the audio data. Is converted into analog data and output through the speaker 280.

Meanwhile, the audio input / output controller 604 encodes an audio signal input from the microphone 270 and then converted into digital data by the A / D converter 230 through the codec module 212 and stores the audio signal in the buffer 220. . At this time, the audio signal stored in the buffer 220 is output to the speaker 280 through the above-described audio signal reproduction operation.

The playback mode manager 606 of the user interface module 213 controls the playback mode when audio or video data input from the codec module 212 is output to the speaker 280 or the display unit 260. Outputs At this time, the play mode includes various modes such as repeat play, fast forward, rewind, and the like.

That is, the reproduction mode manager 606 reproduces audio data or video data reproduced according to a key input signal through the key input unit 600 when audio data or video data is output through the speaker 280 or the display unit 260. Outputs control signals for repeat play, fast forward, and rewind.

Here, the playback mode manager 606 is operated by the 'media file playback method (application number 10-2000-0054902)' filed September 19, 2000 by the same applicant.

The audio post-processing module 214 outputs a control signal for volume control, base / treble effect, and 3D effect according to the sound effect operation signal input through the key input unit 600, and then the speaker 280. Adjust the sound effect of the audio signal output through.

The game engine module 215 decodes game data stored in the CD-ROM / DVD-ROM disk 300 through sequential operations of the file system module 211 and the codec module 212, and decodes the game data. Perform the game by.

The reproduction operation of the MP3 file using the multimedia file reproducing apparatus according to the present invention configured and operated as described above will be described in more detail.

First, when a user of a multimedia file playing apparatus inputs an MP3 file playing signal through the keypad 250, the key input unit 600 of the user interface module 213 receives an MP3 file playing signal from the keypad 250.

The controller 210 plays an MP3 file corresponding to a playback signal input through the key input unit 600 and plays the multimedia file stored in the CD-ROM / DVD-ROM disk 300 through the loader unit 200. The MP3 file data corresponding to the signal is selectively read and stored in the buffer 220.

In this case, the loader 200 performs error correction and decoding of the descrambling in the MP3 file data corresponding to the playback signal input by the loader controller 406 of the controller 210.

The buffer 220 also temporarily stores MP3 file data stored in the CD-ROM / DVD-ROM disk 300 under the control of the buffer manager 404.

Subsequently, the controller 210 decodes the MP3 file temporarily stored in the buffer 220 by the MP3 codec driver 500 of the codec module 212 and classifies it into video data and audio data.

The MP3 codec driver 500 outputs video data classified according to decoding to the display unit 260 through control of the display control unit 210 of the user interface module 213.

In addition, the MP3 codec driver 500 outputs the decoded and classified audio data to the D / A converter 240 through the control by the audio input / output controller 604, and the D / A converter 240 outputs the audio data to analog. The signal is converted into a signal and output to the speaker 280.

At this time, the audio post-processing module 214 transmits the volume control signal, the base / treble control signal, the 3D effect signal, etc. to the D / A converter 240 according to the sound effect operation signal input by the user through the keypad 250. The sound control signal is output to the D / A converter 240.

The D / A converter 240 outputs an audio signal whose sound effect is controlled in various forms to the speaker 280 according to the sound control signal.

A method of performing multimedia file reproduction according to the present invention configured and operated as described above will be described with reference to the accompanying drawings.

7 is a flowchart for performing a multimedia file playback according to the present invention.

First, the loader 200 reads the multimedia file data recorded on the CD-ROM / DVD-ROM disc 300 (S700), first decodes the read multimedia file data and temporarily stores the multimedia file data in the buffer 220. Save (S702).

That is, the loader 200 recognizes the data recording format of the CD-ROM / DVD-ROM disc 300 through the control of the ISO 9660 recognizing unit 400 or the UDF recognizing unit 402 of the control unit 210. Next, the multimedia file data is read and converted into a high frequency signal using the recognized recording format, and first decoding for error correction and descrambling of the multimedia file data converted into the high frequency signal is performed.

At this time, the overall operation of the loader 200 is controlled by the controller 210.

Subsequently, the controller 210 performs second decoding by the codec driver corresponding to the extension of the multimedia file temporarily stored in the buffer 220 among the plurality of codec drivers in the codec module 212 (S704).

Here, the second decoding is a process of extracting video data and audio data by decoding the multimedia file.

The controller 210 outputs video data or audio data of the second decoded multimedia file to the speaker 280 via the display unit 260 or the D / A converter 240 (S706).

A first decoding process of the multimedia file playing method of the present invention performed through the above process will be described in detail with reference to FIG. 8.

8 is a flowchart for performing first order decoding according to the present invention.

The loader 200 checks whether an error is included in the read multimedia file data (S800).

If an error is included in the above step S800 (S802), the CD / DVD ROM decoder 308 of the loader unit 200 corrects the included error (S804) and decrypts the encrypted multimedia file data. Descrambling is performed (S806).

In addition, the second decoding process of the multimedia file reproduction method of the present invention will be described in more detail with reference to FIG. 9.

9 is a flowchart for performing secondary decoding of the present invention.

First, the controller 210 determines an extension of a multimedia file temporarily stored in the buffer 220 (S900), and selects a codec driver corresponding to the determined extension (S902).

That is, when the multimedia file among the plurality of codec drivers in the codec module 212 is an MP3 file having a '* .mp3' type, the controller 210 controls the MP3 codec driver 500 as a WMA file having a '* .wma' type. In this case, the WMA codec driver 502 is selected.

Subsequently, the controller 210 decodes the multimedia file by the selected codec driver and outputs video data and audio data (S904).

The multimedia file reproducing apparatus and method according to the present invention uses a CD-ROM / DVD-ROM disc as a multimedia file storage medium.

Therefore, the present invention can store a larger multimedia file using a CD-ROM / DVD-ROM disk having a larger storage capacity than a conventional flash memory.

In addition, the present invention can play various types of multimedia files stored in the CD-ROM / DVD-ROM disk through the multi-codec driver, there is an effect that can increase the user's satisfaction with the multimedia playback device.

In addition, since the multi-codec driver is not a hardware configuration but a software configuration by a RISC CPU, a new codec driver can be added through a software upgrade when a newer multimedia file is to be played. There is also.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (13)

In the multimedia file playback apparatus, A loader unit for reading multimedia file data stored in a CD-ROM / DVD-ROM disk; A buffer for temporarily storing multimedia file data read by the loader unit; And (a) a file system module that controls reading of the multimedia file data of the loader unit and extracts and manages a part or all of the multimedia file from the read multimedia file data, (b) a codec module for decoding by a codec driver corresponding to an extension of a multimedia file temporarily stored in the buffer, the codec module including a plurality of codec drivers for decoding a plurality of types of multimedia files, (c) a control unit including a user interface module for outputting video data or audio data of the decoded multimedia file to a video or audio output device; Multimedia file playback device comprising a. The method of claim 1, And the multimedia file comprises an audio file, a graphic file, or a video file having a plurality of extensions. The method of claim 1, The file system module A recording format recognizing unit for recognizing a recording format of multimedia file data stored in the CD-ROM / DVD-ROM disc, the recording format recognizing unit including an ISO 9660 recognizing unit and a UDF recognizing unit; A buffer manager for managing the buffer; A loader control unit for controlling a reading position of multimedia file data stored in the CD-ROM / DVD-ROM disk; CD-ROM / DVD-ROM decoding control unit for controlling first decoding of the multimedia file data read by the loader unit Multimedia file playback apparatus comprising a. The method of claim 1, The codec module is Include at least an MP3 codec driver, a WMA codec driver, an AAC codec driver, an MPEG codec driver, or an ASF codec driver, depending on the extension type of the multimedia file temporarily stored in the buffer. The codec module adds a codec driver for decoding a plurality of multimedia files through a software upgrade. The method of claim 1, The user interface module A key input unit receiving an operation signal from a user; A display controller for controlling video data output of the multimedia file decoded by the codec module; An audio input / output controller for controlling audio data output of the multimedia file decoded by the codec module; Playback mode management unit for outputting a control signal for controlling the playback mode of the multimedia file to the file system module Multimedia file playback apparatus comprising a. The method of claim 1, The loader part An optical pickup for reading multimedia file data stored in the CD-ROM / DVD-ROM disk; An RF amplifier converting the multimedia file data read by the optical pickup into a high frequency signal; A digital signal processor for converting the high frequency-converted multimedia file data into a digital signal; And CD / DVD ROM decoder for performing error correction and first decoding of descrambling of the multimedia file data converted into the digital signal Multimedia file playback device comprising a. The method of claim 1, The control unit is a multimedia file playback device, characterized in that the RISC (Reduced Instruction Set Computer) type CPU. The method of claim 1, The file system module, the codec module and the user interface module may be configured by programming for performing the operation. The method of claim 1, An audio post-processing module for outputting a sound effect control signal to audio data output to the audio output device; Game engine module for executing a game according to the game data stored in the CD-ROM / DVD-ROM disk Include more, And the sound effect control signal includes at least a volume control signal, a bass / tradle control signal, and a 3D effect signal. In the playback method for playing a multimedia file, Reading and multimedia decoding the multimedia file stored in the CD-ROM / DVD-ROM disk; Temporarily storing the first decoded multimedia file; Second decoding by a codec driver corresponding to the extension of the temporarily stored multimedia file; Outputting video data or audio data of the second decoded multimedia file to a video or audio output device; Multimedia file playback method comprising a. The method of claim 10, The first decoding of the multimedia file stored in the CD-ROM / DVD-ROM disc by reading Reading multimedia files stored on the CD-ROM / DVD-ROM disk; Determining whether error data is included in the read multimedia file; Correcting the included error data; Descrambling the error corrected multimedia file Multimedia playback method comprising a. The method of claim 10, The second decoding by the codec driver corresponding to the extension of the temporarily stored multimedia file is Determining an extension of the multimedia file; Selecting a codec driver corresponding to the determined extension; Outputting video data and audio data by performing decoding by the selected codec driver; Multimedia playback method comprising a. A memory in which a program is stored; A processor coupled to the memory to execute the program Including but not limited to: The processor by the program, Reading and multimedia decoding the multimedia file stored in the multimedia file storage medium; Temporarily storing the first decoded multimedia file; Second decoding by a codec driver corresponding to the extension of the temporarily stored multimedia file; Outputting video data or audio data of the second decoded multimedia file to a video or audio output device; Run the The multimedia file storage medium is a multimedia file playback system, characterized in that the CD-ROM / DVD-ROM disk.