JP2002539508A - Portable data storage / sound reproduction device - Google Patents

Abstract

(57) [Summary] A portable data storage / sound reproducing device converts an input AC power into a DC power of a predetermined level, rectifies the converted DC power, and supplies the rectified DC power to the reproducing device. A power supply 36 to be supplied, a key input unit 10 for inputting a plurality of key signals for operating various functions of the reproducing apparatus, and audio data and various audio data via the Internet or PC communication according to a built-in program. A personal computer 12 for downloading and storing, a flash memory 14 having a predetermined storage capacity for storing audio data or various information data from the personal computer 12, and a microphone for converting an external input voice or sound signal into an electric signal 16 and a predetermined frequency via a receiving antenna. It controls the operation of the FM radio receiver 18 for receiving FM radio signals of several bands, the key input unit, the personal computer and the flash memory, and executes the arithmetic processing of the output data in accordance with the program therein to obtain a plurality of FM radio signals. A CPU 20 for generating control signals; an LCD 22 for providing a visual display of output data signals from the CPU 20; a digital signal processor 24 for processing digital signals input / output to / from the CPU 20; , And transmits the coded analog audio signal to the audio input / output unit 28, decodes the analog audio signal from the audio input / output unit 28 into a digital audio signal, and decodes the digital audio signal. Digital audio An audio codec 26 for transmitting an audio signal to the digital signal processor; and an audio input for receiving an external analog audio signal, transmitting it to the audio codec, receiving an analog audio signal from the audio codec and outputting the same to the outside. A radio frequency transmission unit 30 for modulating a coded analog audio signal from the audio codec into a radio frequency signal and transmitting the modulated radio frequency signal remotely via a transmitting antenna; A portable data storage / sound reproduction device, comprising: an equalizer 35 for compensating for distortion of audio data output from the reproduction device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable data storage / sound reproduction apparatus, and more particularly, to a portable data storage / sound reproduction apparatus capable of downloading data to another personal computer or data storage means. The sound of the stored audio data can be stored audibly while carrying the
And various information data other than audio data can be downloaded from a personal computer, and the downloaded information data can be stored in a memory chip or another personal computer or data storage means.
The present invention relates to a portable data storage / sound reproduction device.

[0002]

[Prior art]

Typically, audio systems such as cassette tape records, compact disc players or laser disc players are used to record audio or sound audio signals and / or to reproduce the recorded audio signals. Such an audio system can record and / or reproduce a sound audio signal from / on a recording medium such as a magnetic tape or a magneto-optical disk.

[0003] When a magnetic tape is used as the recording medium, it is preferable to repeat recording and reproduction of the audio signal. However, due to its characteristics, the recording medium is used semipermanently under inappropriate conditions such as heat and humidity. Is difficult to do. Further, the magnetic tape tends to deteriorate due to friction with an erasing head or a recording head attached to the audio system when recording or reproducing an audio signal. Such deterioration of the magnetic tape deteriorates the sound quality, and therefore the magnetic tape cannot be used for a long time.

When a compact disc is used as the recording medium, it is preferable to reproduce the audio signal recorded on the compact disc semi-permanently, but it is possible to record the audio signal on the compact disc. There is a disadvantage that there is a special device. Moreover, such devices are rarely equipped due to their high cost.

Further, it is not easy to record a data signal from a personal computer other than a voice or sound audio signal on the recording medium, and to copy or record the recorded data signal to another personal computer or a recording medium.

In other words, an audio system such as a cassette tape recorder using a magnetic tape as a recording medium can record, reproduce, and erase audio data on the magnetic tape. Cannot quickly select a desired song by the user due to rewinding or fast-forwarding. Furthermore, compact discs cannot record audio data thereon. Audio data cannot be recorded without using a separate device, which is disadvantageous in terms of cost. Further, it is difficult for the user to exchange a series of magnetic tapes or compact discs having songs with different music genres, singers or groups to listen to the desired songs.

Further, the magnetic tape or the compact disk as the recording medium is connected to the output device only by a wire, so that the user cannot remotely listen to the tape or the disk away from the tape or the disk. Further, it has not been easy to record special information data other than audio data on a magnetic tape or a compact disk.

[0008]

[Problems to be solved by the invention]

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to record a program running on a personal computer or an audio data storage medium such as a memory chip using a compression technique by an audio recording device. The compressed audio data can be downloaded via the Internet or a PC communication in accordance with a program for downloading the compressed audio data, and the downloaded audio data can be used by the user for music or language learning of the audio data. It is an object of the present invention to provide a portable data storage / sound reproducing device capable of recording and outputting sound while carrying a reproducing device.

Another object of the present invention is to provide a portable data storage / sound reproducing apparatus capable of storing various information data and transferring the recorded information data to another computer or a recording medium.

Still another object of the present invention is to classify compressed stored audio data according to a list, visually display the classified list by a display means, and allow a user to listen to music of the audio data from the audio system. Portable data storage / capable of wirelessly communicating audio data to the audio system wirelessly
An object of the present invention is to provide a sound reproducing device.

According to the present invention, the above and other objects are a portable data storage / sound reproducing apparatus, which converts an input AC power into a DC power of a predetermined level, rectifies the converted DC power, A power supply for supplying rectified DC power to the reproducing apparatus, a key input unit for inputting a plurality of key signals for operating various functions of the reproducing apparatus, audio data and various kinds of data via the Internet or PC communication; A personal computer for downloading and storing audio data according to a built-in program; a flash memory having a predetermined storage capacity for storing audio data or various information data from the personal computer; Via an microphone for signal conversion and a receiving antenna And controls the operation of the FM radio receiver for receiving the FM radio signal of the predetermined frequency band, the key input unit, the personal computer and the flash memory, and executes the arithmetic processing of the output data according to the program therein. A central processing unit for generating a plurality of control signals; a liquid crystal display for providing a visible display of output data signals from the central processing unit; and a digital signal input / output to / from the central processing unit A digital signal processor that encodes the digital audio signal from the digital signal processor, transmits the coded analog audio signal to an audio input / output unit, and converts the analog audio signal from the audio input / output unit to digital audio. And decode it into a signal An audio codec for transmitting the combined digital audio signal to the digital signal processor and an external analog audio signal, transmitting the signal to the audio codec, receiving the analog audio signal from the audio codec and outputting the signal to the outside An audio input / output unit for modulating a coded analog audio signal from the audio codec into a radio frequency signal and transmitting the modulated radio frequency signal remotely via a transmission antenna And an equalizer for compensating for distortion of audio data output from the playback device. The portable data storage / sound playback device is characterized in that it is achieved by providing a portable data storage / sound playback device.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Referring to FIG. 1, the configuration of a portable data storage / sound reproduction device according to the present invention is shown in block form. In the figure, reference numeral 36 denotes a power supply for converting an input AC power supply (AC) into a DC power supply (DC) having a predetermined level, rectifying the converted DC power, and supplying the rectified DC power to a reproducing apparatus. Is shown. Alternatively, a conventional battery or a rechargeable battery can be used instead of the power supply 36. The power supply 36 includes another adapter that drops or converts an external voltage, or a regulator that outputs a stable constant voltage.
Preferably, the playback device receives power from an adapter or a battery. Batteries usually contain nickel or ions. Preferably, the battery is charged with power from the adapter.

Reference numeral 10 denotes an s-key input unit for inputting a plurality of key signals for operating various functions of the reproducing apparatus. The key input unit 10 includes a recording key for recording audio data in the reproducing apparatus, a reproducing key for reproducing audio data recorded in the reproducing apparatus, a stop key for stopping the operation of the reproducing apparatus, and a reproducing apparatus. Volume key for raising or lowering the output audio level from the recorder, a start / end point search key for searching for a start point and an end point of audio data recorded in the playback device, a menu key for displaying all functions of the playback device An equalizer on / off key for adjusting on / off of an equalizer 35 for correcting an output sound from the reproducing apparatus, a repetition key for repeating reproduction of desired data in the reproducing apparatus, F
It includes a frequency modulation (FM) radio on key for receiving M radio signals, a radio frequency transmission key for wirelessly transmitting audio signals, and a radio frequency transmission key for wirelessly transmitting data signals.

Reference numeral 12 denotes audio data compressed using the Moving Picture Experts Group 2 (MPEG2) layer (MP3) technology, which is an international sound compression standard, and the Internet or the Internet in accordance with a built-in program. 1 shows a personal computer for downloading various information data via PC communication and recording the downloaded audio data and information data. The personal computer 12 can download not only audio data but also information data in various file units and output the data to a connected input / output device.

Reference numeral 14 denotes a flash memory 14 having a predetermined storage capacity for storing audio data and various information data from the personal computer 12.
When the total data stored in the flash memory 14 exceeds a predetermined storage capacity, the input command is automatically canceled. Preferably, the flash memory 14 is a random access memory (RAM) or an electrically erasable read only memory (EEP).
ROM).

Reference numeral 16 denotes a microphone for converting external input voice and sound into an electric signal.

Reference numeral 18 denotes an FM radio receiver for receiving an FM radio signal of a predetermined band via a receiving antenna 19.

Reference numeral 20 controls the operation of the key input unit 10, the personal computer 12, and the flash memory 14, and executes a calculation process of output data in accordance with a built-in program for generating a plurality of control signals. Central control unit (CP
U). The programs incorporated in the CPU 20 are preferably a program for controlling a playback device and a program for recording input audio data.

Reference numeral 22 denotes a liquid crystal display (LCD) that provides a visual display of output data from the CPU 20. The LCD 22 is preferably of a 128 × 32 dot graphic type. The LCD 22 displays the state of charge of the battery, the state of operation of the playback device,
A plurality of icons for visually displaying a key input state of the key input unit 10, a music title output state, a list of audio data stored in the playback device, and the like are included.

Reference numeral 24 denotes a digital signal processor 24 that processes digital signals input / output to / from the CPU 20. Digital signal processor 24 includes a microprocessor for performing algebraic operations on digital values to control filters, modulation / demodulation operations, spectral analysis, and linear estimation.

Reference numeral 26 denotes a digital audio signal from the digital signal processor 24 coded into an analog audio signal, the coded analog audio signal is transmitted to an audio input / output unit 28, and the audio input / output unit 28
1 shows an audio codec for decoding an analog audio signal from a digital signal into a digital audio signal and transmitting the decoded digital audio signal to a digital signal processor 24. The audio input / output unit 28 is adapted to receive an external analog audio signal, transmit it to the audio codec 26, receive the analog audio signal from the audio codec 26, and output it to the outside.

Reference numeral 30 denotes a radio frequency transmitting unit that modulates a coded analog audio signal from the audio codec 26 to a radio frequency and remotely transmits the modulated radio frequency signal via the transmission antenna 31. As shown in FIG. 2, the radio frequency transmitting section 30 sets a predetermined frequency level, and generates a signal at the set frequency level. The frequency setting / oscillation section 40, and the transmission signal from the frequency setting / oscillation section 40 Synchronously with the transmission control unit 42 for outputting a coded analog audio signal from the audio codec 26, and a first control unit for primary-amplifying the audio signal from the transmission control unit 42 to a preset first level. Primary amplifier TR1, primary amplifier TR
The oscillation unit 43 for oscillating the output signal from the first unit 1, the secondary amplification unit TR2 for secondary-amplifying the output signal from the oscillator 43 to a preset second level, the output from the secondary amplification unit TR2 It comprises a tuner 44 for tuning a signal to a predetermined frequency channel, and a gain controller 45 for controlling the transmission gain of the transmitting antenna 31.

The equalizer 35 has a function of reducing a noise component of an output signal from the playback device and compensating for distortion.

The interface 13 is connected to interface data between the personal computer 12 and the CPU 20, and the interface 29 is connected between the audio input / output unit 28 and the audio system 32 to interface data. Connected.

Here, the operation of the portable data storage / sound reproducing apparatus having the above-described configuration according to the present invention will be described in detail.

First, as required by the user, the personal computer 12 is compressed in the MP3 format by a compression technique and uploaded to a homepage, a bulletin board, or a data library via the Internet or a PC communication for a fee or free of charge. Download and record audio data. At this time, in this playback device,
The audio data downloaded by the personal computer 12 is C
It is stored in the flash memory 14 via the interface 13 under the control of the PU 20. At this time, about 3 to 4 MBytes is enough to store music data having a length of about 3 minutes in the MP3 file format, whereas about 40 MBytes is required to store such music data on a normal compact disc. The above is necessary.

As a result, the number of music files that can be stored is determined according to the storage capacity of the flash memory 14 and the size of each file. In this embodiment, about 20 music files are stored in the flash memory 14. Alternatively, if a smart card or another storage means is connected, more music files can be stored in the playback device. Preferably, the flash memory 14 can store total music data corresponding to one hour or more.

On the other hand, the externally input voice or sound from the microphone 16 can be stored in the flash memory 14. That is, the microphone 16 converts an external input voice or sound signal into an electric signal, and stores the electric signal in the flash memory 14 under the control of the CPU 20. When the FM wireless on key of the key input unit 10 is operated by the user, the CPU 20 applies a corresponding control command to the FM radio receiver 18 to receive the FM radio broadcast via the receiving antenna 19. At this time, when the recording key of the key input unit 10 is operated by the user, F
The FM radio broadcast received by the M radio receiver is stored in the flash memory 14 under the control of the CPU.

Alternatively, audio data relating to a foreign language from the personal computer 12 or the audio system 32 can be stored in the flash memory 14 under the control of the CPU 20, so that the user can learn the foreign language.

On the other hand, for example, HWP, BMP, G
Data having extended names such as IF, TXT, and DOC can be downloaded and stored in the flash memory 14 under the control of the CPU 20. In this case, the data stored in the flash memory 14 can be transmitted to another personal computer and stored.

The LCD 22 provides, under the control of the CPU 20, a character or numeric display of all functions of the playback apparatus. The LCD 22 can display a maximum of about 12 characters and two lines, and is preferably a graphic type of 128 × 32 dots. For example, the LCD 22 can display a key input state of the key input unit 10 and a control state by the CPU 20. Alternatively, if you have another icon, the LCD
Reference numeral 22 indicates a state of charge of a battery, a current time, a function as a calculator, or a game machine according to various programs.

The LCD 22 can display whether the music file stored in the flash memory 14 is described in Korean or in a foreign language such as English or Japanese. The LCD 22 preferably displays the contents of the music file stored in the flash memory 14 in Korean and English. For example, if the music file stored in the flash memory 14 is in Korean or English,
2 displays the title, lyrics, lyricist, and composer of the music file in Korean or English.

The present playback device preferably has a music selection function of displaying a desired group, singer or genre of the user, or a user's favorite music on the LCD 22.
Further, the music file list stored in the flash memory 14 can be displayed on the LCD 22 in the storage order.

On the other hand, in the compression method of the present invention, audio and video signals are transmitted at a transmission rate of 1
0.5 MBits / sec (Video: 1.2 MBits / sec, Audio: 0.3
MBits / sec). Actually, the total audio data of the uncompressed compact disc is 44.100 Sample / sec × 16 Bits / sec.
× 2 channels, more than 1.4 MBits / sec. here,
Monophonic is a single audio channel, and stereo channels do not join stereo coding.

The equalizer 35 is connected to the CPU 20 in order to improve the S / N ratio of the audio data output from the reproducing apparatus, and can restore the output sound quality of the compact disc without attenuating the data. When the reproduction key input of the key input unit 10 is operated by the user, the CPU 20 outputs the music file stored in the flash memory 14 to the digital signal processor 24 for digital processing. Digital signal processor 24 performs algebraic operations on digital values to control filtering, modulation / demodulation operations, spectral analysis and linear estimation.

The audio codec 26 encodes the digital audio signal from the digital signal processor 24 into an analog audio signal, and the encoded audio signal is transmitted to the audio input / output unit 28.

The audio input / output unit 28 amplifies an analog audio signal from the audio codec 26 to an audible frequency level, and transmits the analog audio signal to the audio system 32 via the interface 29 by wire. On the other hand, when the radio frequency transmission key of the key input unit 10 is operated by the user, the radio frequency transmission unit 30 modulates the coded analog audio signal from the audio codec 26 into a radio frequency signal, and modulates the signal. The transmitted radio frequency signal is transmitted via the transmission antenna 31. That is, in the radio frequency transmission unit 30, the frequency setting / oscillation circuit 40 sets the frequency level to the approved FM frequency of 106.2 MHz, and generates a signal oscillation at the set frequency level. At this time, the transmission control unit 42
The coded analog audio signal is output from the audio codec 26 so as to synchronize with the coded analog signal from the oscillation circuit 40, and the first amplifier TR1 sets the audio signal from the transmission control unit 42 in advance. The primary amplification is performed up to the set first level. The oscillator 43 oscillates the output signal from the first amplifier TR1, and the second amplifier TR2 outputs the output signal from the oscillator 43 to a preset second signal.
Amplify to secondary level. Subsequently, the secondary amplified signal from the second amplifier TR2 is transmitted via the tuner 44, the gain control unit 45, and the transmission antenna 31.

At this time, the audio system 32 receives the radio frequency signal from the radio frequency transmission unit 30 via the receiving antenna 33, combines the original audio signal, and combines the combined audio signal via the speaker 37. Output to the outside. The audio system 32 preferably has an FM radio receiver for receiving and demodulating a radio frequency signal from the radio frequency transmission unit 30.

Therefore, the present reproducing apparatus can reproduce the music file stored therein and transmit it remotely to a desired audio system having an FM radio receiver not only by wire but also by radio.

Further, conversely, audio from the desired audio system is received by wire or wirelessly and stored in the flash memory 14 via the audio codec 26 and the digital signal processor 24 under the control of the CPU 20. Further, the user can listen to the sound of the music file stored in the playback device using the earphone or the headphones. The playback apparatus preferably employs a run-length encoding technique for a silent compression method of audio data.

Industrial Applicability As is clear from the above description, the present invention downloads and receives MP3 music files, various files or foreign language data via the Internet, PC communication, FM radio receiver, microphone or audio system. , A portable data recording and sound reproducing apparatus capable of recording. Therefore, the user can transfer the sound or voice of the audio data stored in the playback device to the earphone,
It can be listened to while carrying through headphones or speakers. Further, the user can listen to the sound or voice of the stored audio data via a wired or wireless audio system. Further, the playback apparatus can download and store music files of a music genre, a singer or a group desired by the user from an MP3 music file vending machine,
The stored music files can be erased in storage order or automatically or simultaneously. Further, the user can visually recognize the operation state of the playback device via the liquid crystal display. In addition, the present reproducing apparatus is designed in such a small size that it is convenient for carrying.

While the preferred embodiment of the invention has been disclosed for purposes of illustration, various modifications, additions, and substitutions may be made by one skilled in the art without departing from the spirit and scope of the invention as set forth in the appended claims. is there.

[Brief description of the drawings]

The above and objects, features and other advantages of the present invention will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings.

FIG. 1 is a block diagram of a portable data storage / sound reproduction device according to the present invention;

FIG. 2 is a detailed circuit configuration diagram of the radio frequency transmitter of FIG. 1;

──────────────────────────────────────────────────続 き Continuation of front page (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE ), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, TZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CR, CU, CZ, DE, DK, DM, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID , IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW (72 ) Inventor Park Hun-South Republic of Korea 412-270, Gyeonggi-do, Doc Yang-k, Hwajeong-dong, 1135, Okbimaul 1710-702 3Don, 1091, Dugong Sibomb apartment, 7-11 F term (reference) 5D045 DB01 DB03 [Continued from summary], Digital signal processor 24 for processing digital signals input / output to / from CPU 20; Digital The digital audio signal from the signal processor 24 is encoded, the encoded analog audio signal is transmitted to an audio input / output unit 28, and the analog audio signal from the audio input / output unit 28 is converted into a digital audio signal. An audio codec 26 for transmitting the decoded digital audio signal to the digital signal processor; an external analog audio signal; receiving the external analog audio signal; transmitting the external analog audio signal to the audio codec; An audio input / output unit for receiving and outputting the same to the outside; a coded analog audio signal from the audio codec being modulated into a radio frequency signal, and the modulated radio frequency signal being transmitted to a transmitting antenna. Through to the RF transmission unit 30 for transmitting remotely, the reproducing apparatus and an equalizer 35 for compensating for the distortion of the output audio data from the portable data storage / sound reproducing apparatus characterized in that it consists.

Claims (8)

[Claims] 1. A portable data storage / sound reproducing apparatus for converting an input AC power into a DC power of a predetermined level, rectifying the converted DC power, and supplying the rectified DC power to the reproducing apparatus. Power supply, a key input unit for inputting a plurality of key signals for operating various functions of the playback device, and downloading and storing audio data and various audio data via the Internet or PC communication according to a built-in program. A flash memory having a predetermined storage capacity for storing audio data or various information data from the personal computer, a microphone for converting an external input voice or sound signal into an electric signal, and a receiving antenna. FM radio signal of predetermined frequency band via And a central processing unit that controls the operation of the key input unit, the personal computer, and the flash memory, executes an arithmetic operation on output data according to a program therein, and generates a plurality of control signals. An arithmetic processing unit; a liquid crystal display for providing a visible display of output data signals from the central processing unit; a digital signal processor for processing digital signals input / output to / from the central processing unit; Encoding a digital audio signal from a signal processor, transmitting the encoded analog audio signal to an audio input / output unit, decoding the analog audio signal from the audio input / output unit into a digital audio signal, Digital audio An audio codec for transmitting an audio signal to the digital signal processor; and an audio input / output for receiving an external analog audio signal, transmitting it to the audio codec, receiving an analog audio signal from the audio codec, and outputting the same to the outside. An output unit; a radio frequency transmission unit that modulates a coded analog audio signal from the audio codec into a radio frequency signal, and remotely transmits the modulated radio frequency signal via a transmission antenna; A portable data storage / sound reproduction device, comprising: an equalizer for compensating for distortion of output audio data from the device. 2. The playback device according to claim 2, wherein the key input unit includes: a recording key for storing audio data in the flash memory; a playback key for reproducing the audio data stored in the flash memory; A stop key for stopping operation, a volume key for increasing or decreasing the level of output audio from the playback device, and a start point for searching for a start point and an end point of audio data stored in the flash memory. / End point search key; a menu key for displaying all functions of the playback device; an equalizer on / off key for turning on / off the operation of the equalizer; and a repetition for repeating playback of predetermined data in the playback device. A key; an FM radio on key for starting operation of the FM radio receiver; 2. The portable data storage / sound reproducing device according to claim 1, further comprising: a radio frequency transmission key for starting operation of the radio frequency transmission unit. 3. The radio frequency transmission section sets a predetermined frequency level, and generates a signal oscillation at the set frequency level, and synchronizes with an oscillation signal from the frequency setting / oscillation section. A transmission control unit for outputting a coded analog audio signal from the audio codec, and a first amplification unit for primary-amplifying the audio signal from the transmission control unit to a preset first level. A primary amplifying unit; an oscillating unit for oscillating an output signal from the primary amplifying unit; and a second amplifying the output signal from the oscillating unit to a second level set in advance.
2. A secondary amplification unit, a tuning unit that tunes an output signal from the secondary amplification unit to a predetermined frequency channel, and a gain control unit that controls a transmission gain of the transmission antenna. 3. A portable data storage / sound reproduction device as described in the above. 4. The apparatus according to claim 1, further comprising receiving the analog audio signal from the audio input / output unit by wire, amplifying the analog audio signal, outputting the amplified audio signal to the outside via a speaker, or transmitting the radio frequency signal to the radio frequency transmission unit. An audio system that wirelessly records the radio frequency signal from the receiver via a receiving antenna, decodes an original audio signal, and outputs a composited audio signal to the outside via the speaker. The portable data storage / sound reproduction device according to claim 1, wherein 5. A first interface for connecting between the personal computer for data interface and the central processing unit, and a second interface for connecting between the audio input / output unit and audio unit for data interface. The portable data storage / sound reproduction device according to any one of claims 1 to 4, further comprising: 6. The portable data storage / sound reproducing apparatus according to claim 1, wherein the para-supply is a normal battery or a rechargeable battery. 7. The liquid crystal display is a graphic type of 128 × 32 dots, and the display includes a charge state of the battery, an operation state of the playback device, a key input state of the key input unit, a title of output music, The portable data storage / sound reproduction device according to any one of claims 1 to 6, further comprising a plurality of icons for visually displaying a list of audio data stored in the flash memory. 8. The portable data storage / sound reproduction device according to claim 1, wherein the flash memory is a random access memory or an electrically erasable random access memory connected to a smart card.