KR20020006678A - Portable data storage/audio reproduction apparatus - Google Patents

Abstract

PURPOSE: A portable data storage/audio reproduction apparatus is provided to portably hear an audio data downloaded through Internet or PC communication, to carry various information data downloaded, and to store the audio data and various information data to the PC or a data storing means. CONSTITUTION: A portable data storage/audio reproduction apparatus comprising a power supply(36) for supplying operating power to the reproduction apparatus, a key input unit(10) for inputting a plurality of key signals, a personal computer(12) for downloading and storing audio data and various information data through Internet or PC communication, a flash memory(14) for storing the audio data and various information data from the personal computer(12), a microphone(16) for converting external input voice or sound into an electrical signal, an FM radio receiver(18) for receiving a desired band of FM radio signals, a CPU(20) for generating a plurality of control signals, an LCD(22) for providing a visual indication of output data from the CPU(20), a digital signal processor(24) for processing input/output digital signals to/from the CPU(20), an audio codec(26) for performing audio coding/decoding operations, an audio input/output unit(28) for receiving an external analog audio signal, transferring it to the audio codec(26), receiving an analog audio signal from the audio codec and outputting it externally, a radio frequency transmitter(30) for modulating the analog audio signal from the audio codec into a radio frequency signal to remotely transmit it, and an equalizer(35) for compensating for a distortion of output audio data from the reproduction apparatus.

Description

Portable data storage and sound reproducing device {PORTABLE DATA STORAGE / AUDIO REPRODUCTION APPARATUS}

In general, audio or audio signals are recorded or recorded and then played back. An audio system such as a cassette tape recorder, a compact disc player, or a laser disc player is used, and such an audio system is a voice from a recording medium in the form of magnetic tape or magneto-optical disc. In addition, audio signals can be recorded or reproduced.

In the case of the magnetic tape as the recording medium, recording and reproduction can be repeatedly performed. However, due to the characteristics of the magnetic tape, it is difficult to use it semipermanently under adverse conditions such as heat and humidity. Magnetic tapes have not been easy to use for a long time due to problems such as deterioration of sound quality due to friction between the erase head or the recording head mounted on the system and the magnetic tape.

In the case of compact discs, although recorded sound signals can be reproduced semi-permanently, they are not equipped with devices or equipment capable of recording and recording voices or sound signals, and are expensive even when mounted. It is rarely applied to the system.

In addition, it is not easy to record data signals generated from a computer in addition to voice or sound signals, and to copy or store the recorded data to another computer or a recording medium.

As described above, magnetic tapes as recording media of cassette tape recorders and audio systems can record, store, and delete sound data, but can quickly select songs to be listened to by mechanical degradation, rewinding, or fast forwarding. There was problem such as not. In addition, the compact disc is not easy to record and store without a separate device, and has a disadvantage in terms of price. This is a hassle of having to replace a separate cassette tape or compact disc for music of different music genres, singers or groups.

In addition, in the case of the magnetic tape or compact disc as the recording medium, only the wired output device is connected to the output device, so that music cannot be remotely listened to. It was not easy to store.

The present invention relates to a portable data storage and sound reproducing apparatus, and more particularly, it is possible to carry and listen to sound data downloaded from a computer or an audio device using a memory chip, as well as to download and carry various information data. A portable data storage and sound reproducing apparatus capable of storing data in another personal computer or data storage means.

1 is a block diagram of a portable data storage and sound reproducing apparatus according to the present invention,

2 is a circuit diagram of a radio frequency transmitter of the present invention.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. The present invention provides a device for recording and storing sound using a compression technology in a medium for recording sound data, such as a memory chip, or by operating a predetermined program in a computer or the Internet. It is an object of the present invention to provide a portable data storage and sound reproducing apparatus that can be used for listening to music or learning language by outputting stored sound data while downloading and carrying compressed sound data through a portable device.

It is also an object of the present invention to provide a portable data storage and sound reproducing apparatus capable of recording and storing a variety of information data and then storing or transferring the data to another recording medium or a computer.

In addition, the present invention can classify the list of the compressed sound data or display the sorted list visually through the display means, so that the sound data can be transmitted to the remote audio system wirelessly to listen to the sound from the audio system. It is for a different purpose.

In order to achieve the above object, the present invention provides a portable data storage and sound reproducing apparatus, comprising: a power supply unit for converting an input AC power into a DC power of a predetermined level, rectifying the converted DC power, and supplying the converted DC power to the apparatus; A key input unit for inputting a plurality of key signals to drive various functions of the apparatus, a personal computer which downloads various sound data through an embedded program or stores various information data through the Internet or PC communication; A flash memory having a predetermined storage capacity for inputting and outputting various data from a personal computer, a microphone for converting sound signals input from the outside into an electrical signal, and an FM radio receiver for receiving FM frequencies induced by a receiving antenna from the air. And driving the key input unit, the personal computer and the flash memory. Or a CPU for outputting a control signal, a liquid crystal display for visually displaying a data signal output from the CPU, and a signal input / output from the CPU as a digital signal. A digital signal processor, an audio codec unit for encoding or decoding an input sound data signal, an audio input / output unit for converting input / output sound data into an electrical signal, and a transmission antenna for converting input sound data into a radio frequency It is characterized in that the radio frequency transmitting unit for transmitting through the remote, and an equalizer for compensating for the distortion of the output data.

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

1 is a block diagram of a portable data storage and sound reproducing apparatus according to the present invention.

The power supply unit 36 converts and rectifies the input AC power AC into a DC power DC of a predetermined level, or selectively configures a rechargeable battery for charging or discharging a general battery or a predetermined capacity of power. 36) includes a separate adapter for dropping or converting voltage or a regulator for outputting a constant, stable voltage, the rechargeable battery being either nickel- or ion-containing, and the regenerator being powered through the adapter or powered by the rechargeable battery. It can be supplied, the rechargeable battery is preferably to charge the power through the adapter.

The key input section 10 is input for driving various functions provided in the playback apparatus. The key input section 10 is a playback key for driving the output of recorded and stored data in the playback apparatus of the present invention, and the playback apparatus. Search for all functions the playback device has; a stop key for switching the drive state of the drive to a stop state; a volume key for raising or lowering the output sound level; A menu key for displaying or displaying, an equalizer driving key for turning on or off the driving of an equalizer for sound correction, a repetition key for repeatedly playing desired data, a recording key for recording and storing data, and an FM An FM radio driving key for receiving a radio and a radio frequency transmitting key for transmitting a data signal wirelessly are included.

The personal computer 12 downloads the sound data compressed by the MP3 (MPEG 2 LAYER 3), a technology that compresses the audio quality to the world standard uploaded on the Internet or PC communication, or stores various information data. The personal computer 12 includes a function of downloading not only sound data but also information data of various file units and outputting them to a connected input / output device.

The flash memory 14 has a predetermined storage capacity for inputting and outputting various sound data or information data. When the storage capacity exceeds the predetermined storage capacity, the first input data is automatically deleted, and only the last input data is stored. The flash memory 14 may apply general RAM or EEPROM (electrically erasable ROM).

The microphone 16 converts a sound signal input from the outside into an electrical signal, and converts an external sound signal, a voice signal, or a sound signal generated from an FM radio receiver.

The FM radio receiver 18 receives FM frequencies received and induced by the receiving antenna 19 configured from the air, and the FM radio receiver 18 receives air waves of a predetermined band.

The CPU 20 controls the driving of the key input unit 10, the personal computer 12 and the flash memory 14, or outputs a corresponding control signal by judging and arithmetic processing the input data into an embedded program. The CPU 20 includes a program for controlling the playback device, a program for recording and storing input sound data, and the like.

The liquid crystal display unit 22 visually displays the data signal input from the CPU 20. The liquid crystal display unit 22 is a graphic LCD of 128 x 32 dots. An icon is displayed to visually display the driving state of the key input state, the key input state of the key input unit 10, the song name output state, and a list of stored sound data.

The digital signal processing unit 24 samples the signals input and output from the CPU 20 as digital signals. The digital signal processing unit 24 is a special microprocessor that performs signal processing digitally. Manipulation, modulation and demodulation, spectrum analysis, linear prediction, and so on.

The audio codec unit 26 encodes or decodes an input sound data signal, encodes and encodes an analog signal, and decodes and decodes a digital signal. The audio input / output unit 28 converts the input sound data into an electrical signal and outputs it, and converts the output sound data into an audible frequency and outputs it.

The radio frequency transmitter 30 converts the input sound data into a radio frequency and transmits the data remotely through the transmitting antenna 31. In the circuit diagram of FIG. A frequency setting and oscillation unit 40 for setting and oscillating a level, a control unit 42 for outputting a sound signal, and a primary amplification unit TR1 for primary amplifying the sound signal output from the control unit 42 to a predetermined level. And an oscillator 43 for oscillating the primary amplified sound signal, a secondary amplifier TR2 for second amplifying the oscillated sound signal, and a tuning unit 44 for tuning the second amplified sound signal. The gain adjusting unit 45 adjusts the output gain of the sound signal to be transmitted through the transmitting antenna 31.

The equalizer 35 is for compensating for distortion of the sound data to be output. The equalizer 35 reduces attenuation of the sound data and attenuates noise components to compensate for the original sound.

In addition, an interface unit 13 is connected between the personal computer 12 and the CPU 20 or an interface unit 29 for inputting and outputting data between the audio system 32 and the audio input / output unit 28.

The present invention configured as described above will be described. The MP3 music can be downloaded from the homepage, bulletin board, or the library where the sound data using the compression technology is uploaded in the Internet or PC communication through the personal computer 12 or the like. After storing in the form of a file, the data is stored in the flash memory 14 via the CPU 20 via the interface unit 13 of the playback apparatus. At this time, the MP3 type sound data stored in the flash memory 14 requires about 40 MBytes or more in order to store music of about 3 minutes in a file in a general compact disk, but in the case of MP3, about 3 to 4 MBytes is sufficient. .

Therefore, the number of music files is determined and stored according to the storage capacity of the flash memory 14 or the size of the music files. Therefore, about 20 music files are stored in the flash memory 14, but more music files can be stored when a smart card or a separate memory means is connected. The capacity stored in the flash memory 14 is preferably capable of recording for 1 hour or more.

Meanwhile, the flash memory 14 may record and store an external voice or sound input through the microphone 16. This is because the voice or sound signal input from the microphone 16 is converted into an electrical signal and then stored in the flash memory 14 under the control of the CPU 20. In addition, the FM radio broadcast is received through the reception antenna 19 of the FM radio receiver 18 by the FM radio receiver 18 by the control command of the CPU 20 by the operation of the key input unit 10. When the recording key of the key input unit 10 is manipulated, the music output from the FM radio receiver 18 can be recorded and stored in the flash memory 14.

Also, when a foreign language is recorded from the personal computer 12, the audio system 32, or the like and input into the flash memory 14, language learning can be performed.

In addition, the flash memory 14 may download, record and store data stored in the personal computer 12, for example, HWP, BMP, GIF, TXT, DOC, and the like, and store the data in another personal computer 12. have.

The liquid crystal display 22 can display various letters, numbers, and the like so as to display all the driving states of the playback apparatus, which are made by the control of the CPU 20 and the built-in programs. In particular, the liquid crystal display 22 can display a maximum of about 12 characters or two lines in a graphic type of 128 × 32 dots, and can display an input state of the key input unit 10 or a control state of the CPU 20. It is. In addition, when the liquid crystal display unit 22 is configured in a separate icon form, the liquid crystal display unit 22 may be configured to display a state of charge of the battery, display a current time, a calculator function, or play a game by various programs.

In addition, the liquid crystal display 22 can display whether the music file stored in the flash memory 14 is in Korean or a foreign language such as English or Japanese. Basically, it is desirable to display Korean and English. In other words, in Korean or English, the title or lyrics, or the composer or composer can be displayed in Korean or English, respectively.

In addition, the playback apparatus of the present invention has a music selection function so that a user can arbitrarily display a group, a singer, a genre, or a favorite song through the liquid crystal display unit 22. In addition, the storage order of the stored music files can be displayed as a list.

On the other hand, the compression method of the present invention has an audio and video transmission rate of 1.5MBits / sec, wherein the video is 1.2MBits / sec, the audio transmits 0.3MBits / sec. / sec × 16Bits / sec × 2 channels, more than 1.4MBits / sec of data. Here, monophonic is a single audio channel, stereo is a stereo channel joint stereo coding is used to divide the bit.

In the CPU 20 of the present invention, the equalizer 35 is configured to improve the signal-to-noise ratio of the input / output sound data to compensate for the sound quality of the compact disc without attenuation of the sound data. When the playback key is input by the key input of the key input unit 10, the CPU 20 outputs the music file stored in the flash memory 14 to the digital signal processing unit 24, and the digital signal processing unit 24 It is a special microprocessor that digitally processes the signal by sampling the input digital signal and performs the filter operation, modulation and demodulation operation, spectrum analysis, and linear prediction by algebraic operation of digital values.

The sound data input from the digital signal processing unit 24 is decoded and output by the audio codec unit 26, and the digital signal processing unit 24 encodes and outputs the sound data signal. In other words, the analog signal is encoded and encoded, and the digital signal is decoded and decoded.

The signal output from the audio codec unit 26 is converted into an electrical signal by the audio input / output unit 28 and then converted into an audible frequency and output. The audio input / output unit 28 is connected to the audio system 32 by wire through the interface unit 29 to amplify and output the sound to a predetermined level. Also, the sound data output from the audio input / output unit 28 is a radio signal to the receiving antenna 33 of the audio system 32 through the transmitting antenna 31 as an input of the radio frequency transmitting key of the key input unit 10. Is output. That is, the radio frequency transmitter 30 converts the input sound data into a radio frequency and transmits the data remotely through the transmitting antenna 31. The radio frequency transmitter 30 is set in the frequency setting and oscillator 40. When the level is set to a frequency of 106.2 MHz, which is an FM frequency that is formally authorized, the oscillation unit 43 is first oscillated after the sound signal outputted through the control unit 42 is first amplified to a predetermined level by the primary amplification unit TR1. Oscillation, and the oscillated sound signal is again amplified by the secondary amplifying unit TR2 to a predetermined level and then transmitted through the transmitting antenna 31 through the tuning unit 44 and the gain adjusting unit 45. .

The sound data transmitted in this way is received by the receiving antenna 33 of the audio system 32 and then output to the outside through the speaker 37 by the operation of the audio system 32. At this time, the audio system is to output the data received through the FM radio receiver mounted through the tuning and demodulation.

Therefore, the playback apparatus of the present invention can play and listen to music files stored remotely from an audio system equipped with a desired audio system or an FM radio receiver not only by wire but also wirelessly.

Conversely, it is also possible to receive the sound data from the audio system by wire or wirelessly and store the data in the flash memory 14 under the control of the CPU 20 via the audio codec unit 26 and the digital signal processing unit 24. You can also listen to the stored sound data through earphones or headphones.

In addition, the playback apparatus of the present invention includes a silent compression method of a run length coding method for finding and compressing a silent portion by a compression method.

As described above, those skilled in the art will readily recognize that the portable data storage and sound reproducing apparatus of the present invention is not limited to the embodiments of the present invention. It can be changed, substituted, converted and extended.

As described above, the portable data storage and sound reproducing apparatus of the present invention downloads, receives, or receives MP3 music files, various files, or foreign languages from the Internet, PC communications, FM radio receivers, microphones, audio systems, and the like to the flash memory chip. Record, store and play music while listening to it through earphones or headphones, or wirelessly through audio systems or speakers, and download MP3 music files from devices or devices that users want. The music genre, singer or group can be selected and listened to. The stored music files or sound data can be automatically deleted or all deleted by the recorded or stored music files or sound data. The operation status of the playback device By making it compact, such as to make it easy to carry, there is an effect of increasing convenience for users using the MP3 sound DKR file and sound data storage and sound reproducing apparatus.

Claims (8)

A portable data storage and sound reproducing apparatus, A power supply unit which converts the input AC power into a DC power of a predetermined level, rectifies the converted DC power, and supplies the same to the apparatus; A key input unit for inputting a plurality of key signals to drive various functions of the apparatus; A personal computer that downloads various sound data through the Internet or PC communication through a built-in program or stores various information data; A flash memory having a predetermined storage capacity for inputting and outputting various data from the personal computer; A microphone for converting a sound signal input from the outside into an electrical signal, An FM radio receiver for receiving an FM frequency induced by a reception antenna from the air, A CPU which controls the operation of the key input unit, the personal computer and the flash memory, or judges and computes the output data with an embedded program and outputs a corresponding control signal; A liquid crystal display for visually displaying the data signal output from the CPU; A digital signal processing unit for processing signals input and output from the CPU as digital signals; An audio codec unit for encoding or decoding an input sound data signal; An audio input / output unit for converting input / output sound data into an electrical signal, A radio frequency transmitter for converting the input sound data into a radio frequency and transmitting the data remotely through a transmission antenna; Portable data storage and sound reproducing apparatus, characterized by comprising an equalizer for compensating for distortion of the output data. The apparatus of claim 1, wherein the key input unit comprises: a recording key for storing audio data in a flash memory; a playback key for reproducing audio data stored in a flash memory; a stop key for stopping driving of a playback device; A volume key for raising and lowering the output volume, a front and rear reading key for reading back and forth the audio data stored in the flash memory, a menu key for displaying all the functions of the playback device, and an equalizer for turning the equalizer on or off. And a driving key, a repeating key for repeatedly playing desired data, an FM radio driving key for driving FM radio, and a radio frequency transmitting key for driving the radio frequency transmitter. Sound player. The frequency amplifying and oscillating unit for setting and oscillating a frequency, a control unit for outputting a sound signal, and a primary amplification for first amplifying a sound signal output from the control unit to a predetermined level. And an oscillator for oscillating the first amplified sound signal, a second amplifier for amplifying the second oscillated sound signal, a tuning unit for tuning the second amplified sound signal, and a transmission antenna. Portable data storage and sound reproducing apparatus, characterized in that it comprises a gain adjusting unit for adjusting the output gain of the sound signal. The audio system of claim 1, further comprising amplifying a sound signal input through a wire from the audio input / output unit to output or control the sound signal, and receiving a radio frequency from a transmitting antenna of the radio frequency transmitter. Portable data storage and sound playback device further comprises. The portable data storage and sound reproducing apparatus according to any one of claims 1 to 4, wherein an interface unit for inputting and outputting data between the personal computer and the CPU or between an audio system and an audio input / output unit is configured. The portable data storage and sound reproducing apparatus according to claim 1, wherein the power supply unit comprises a general battery or a rechargeable battery. The LCD according to claim 1 or 6, wherein the liquid crystal display is a 128 × 32 dot graphic type LCD, and the state of charge of the rechargeable battery, the driving state of the playback device, the key input state of the key input unit, the song name output state, and the stored sound data. Portable data storage and sound playback device, characterized in that the built-in icon to display the list of visible. The portable data storage and sound reproducing apparatus according to claim 1, wherein the flash memory is RAM, EPI, or a smart card.