KR100538111B1 - A Portable MP3 Changer - Google Patents

Abstract

The present invention relates to a portable MP3 changer having various functions such as an MP3 player function as well as a language learning function and a learning promotion function.

The present invention is a display means for displaying characters or graphics; Expansion memory for storing data; A communication port for communicating with a computer; An audio processor for converting an analog sound signal input through a microphone into digital audio data, converting the digital audio data into an analog sound signal and outputting the analog sound signal to a speaker, and up or down the volume according to a control signal; An MP3 decoder for decoding MP3 data; A key input unit for manipulation; And a microprocessor to operate as an MP3 player when the MP3 player function is selected through the key input unit, to operate as a language learning device when the language learning function is selected, and to perform a learning promotion function when the learning promotion function is selected. Is done. Therefore, according to the present invention, it is possible to perform a language learning function, a radio reception function, a learning promotion function, etc. together with the MP3 player function with the MP3 changer, thereby providing a variety of functions at low cost.

Description

Portable MP3 Changer {A Portable MP3 Changer}

The present invention relates to a portable MP3 player, and more particularly, to a portable MP3 changer having a variety of functions such as an MP3 player function as well as a language learning function and a learning promotion function.

In general, MPEG-3 is a standard for the compression method of an audio signal made from MPEG, and refers to MPEG LAYER-3. MPEG-1 is a compression encoding technique for compressing and storing video signals and audio signals at a maximum of 1.5 Mbps in a digital data storage device. Three audio signal coding schemes are defined in the audio portion of MPEG1, which are layer-1 and layer-2. Layer-1 has a compression ratio of about 1: 4, layer-2 has a compression ratio of about 1: 6 to 1: 8, and layer-3 has a compression ratio of about 1:10 to 1:12. It has an excellent compressibility. As described above, MP3 is an audio data compression technique corresponding to layer-3.

On the other hand, there is a portable compact disc (CD) that is superior in sound quality to a portable cassette as a portable music player. However, in the case of this portable compact disk, since a large size disk must be mounted in the main body, its volume becomes large, and since it is sensitive to external vibrations and shocks, there is an inconvenience that requires considerable attention when carrying. Every time I listened to different kinds of music, I had to buy a separate disk.

For this reason, a portable MP3 player has been developed and used in recent years to download and play digitized MP3 files through a computer network. The MP3 player stores the sound source as digital data in the memory, decodes the stored digital data, converts it to an analog signal, and outputs it through the speaker. Therefore, since music is reproduced using a memory chip having a smaller volume and weight than a conventional disc player, the volume and weight can be significantly reduced, and sound quality equivalent to that of a compact disc can be provided to the user.

However, since the conventional portable MP3 player (MP3 Player) can be used only for listening to music, its function is limited.

The present invention has been made to solve the above problems, an object of the present invention is to provide a portable MP3 changer having a variety of functions, such as MP3 player function as well as language learning function, learning enhancement function, radio reception function.

In order to achieve the above object, the apparatus of the present invention comprises: display means for displaying characters or graphics; Expansion memory for storing data; A communication port for communicating with a computer; An audio processor for converting an analog sound signal input through a microphone into digital audio data, converting the digital audio data into an analog sound signal and outputting the analog sound signal to a speaker, and up or down the volume according to a control signal; An MP3 decoder for decoding MP3 data; A key input unit for manipulation; And when the MP3 player function is selected through the key input unit, reads the MP3 file stored in the expansion memory, provides the MP3 decoder to be decoded, delivers the decoded digital audio data to the audio processor, and selects a language learning function. Read the language-learning contents compressed and stored in the MP3 format from the expansion memory to be decoded by the MP3 decoder, convert the decoded data into characters in the STT module, and display the decoded data on the display means. The speech recognition module compares the digital audio data input from the audio processor with the decoded data and displays the matching degree on the display means. When the learning promotion function is selected, the brain wave stored in the MP3 format in the expansion memory is selected. Related data And a microprocessor for reading and providing to the MP3 decoder for decoding, and for transmitting the decoded digital audio data to the audio processor.

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

1 is a block diagram showing the configuration of a portable MP3 changer according to the present invention. The MP3 changer 100 of the present invention includes a microprocessor 110, a broadcast receiver 120, an audio processor 130, and an MP3 decoder. 140, a key input unit 150, an SMC card interface unit 160, a flash memory 162, a universal serial bus (USB) interface unit 170, an LCD driver 180, an LCD 182, and a microphone 184 ) And a speaker 186. At this time, the SMC card 102, which stores various data and files, is mounted on the SMC card interface unit 160, and when the internal microphone 184 and the internal speaker 186 are not used, the headset 104 is plugged in and used. It is supposed to be. As an expansion memory of the MP3 changer 100, an embodiment of the present invention has been described using an SMC (Smart Media Card) card as an example, but may be implemented using another storage device such as a MMC (Multi Media Card) card or a hard disk. .

Referring to FIG. 1, the microprocessor 110 executes software stored in the flash memory 162 to control all functions according to the manipulation of the key input unit 150. That is, when the user selects the MP3 player function, as described later, the MP3 player module 316 of FIG. 3A reads and decodes the MP3 file recorded in the expansion memory 102, and then plays the MP3 file. Or the built-in speaker 186, and if the language learning function is selected, the voice recognition module 315 and the speech-to-text module 314 are driven, and then the expansion memory 102 Read the language learning content from the language and display it in voice and text, and if the learning promotion function is selected, the learning promotion function module 318 is executed to read and reproduce EEG-related data from the expansion memory 102 to learn brain activity of the learner. To stimulate. In addition, the LCD driver 311 can be executed to display characters, pictures, and graphics on the LCD 182, and the audio control driver 312 is executed to control audio related parameters such as volume according to a user's operation. The communication driver 313 is executed to communicate with a computer by a USB method.

When the radio function switch (Radio) is turned on, the broadcast receiver 120 selects a broadcast channel according to a TUNE CONT signal of the microprocessor 110 to receive a radio signal through an antenna, and receives a radio signal. The demodulator reproduces the audio signal and transmits the audio signal to the audio processor 130.

The audio processor 130 amplifies the audio signal received through the broadcast receiver 120 in the broadcast mode and transmits it to the ear of the internal speaker 186 or the headset 104, and in the MP3 player mode, the MP3 decoder ( After receiving the audio data decoded and restored by the microprocessor 110 and converting the analog data into analog, the analog audio signal is amplified and transmitted to the ear EAR of the built-in speaker 186 or the headset 104. Also, in the language learning mode, when the MP3 decoder 140 decodes and restores the language learning data stored in the form of MP3 file, the language learning data received from the microprocessor 110 is converted into analog and then amplified analog audio signal. It is delivered to the ear (EAR) side of the built-in speaker 186 or the headset (104). In addition, when the learner's analog voice signal is received through the microphone 184, it is converted into a digital signal and transmitted to the microprocessor 110, and the microprocessor 110 restores the native speaker's standard using the voice recognition module 315. After comparing the voice signal and the learner's voice signal and informs the degree of matching.

The MP3 decoder 140 is implemented by a dedicated chip or a digital signal processing processor (DSP) to restore data compressed into an MP3 file back to original data. In other words, the MP3 decoder 140 finds a start position of each frame in the combined bit stream during encoding and decodes all the information necessary for decoding, and code bits of the information decoded in the bit stream deformatting. Huffman decoding function to decode, HIDMAN decoding side information decoding function to decode information in bit stream deformatting, and inverse quantization function to perform inverse quantization with frequency lines and scale factors decoded and quantized in Huffman decoding. And the inverse discrete cosine transform function that makes the audio signal in the inverse quantized frequency domain into the time domain signal, and the synthesis filter bank function that synthesizes the frequency lines divided into 32 subbands in the inverse discrete cosine transform process. Decode the compressed audio data.

The key input unit 150 is composed of a switch or a button for the user to operate the apparatus according to the present invention, the operation of the microprocessor 110 according to the operation of the switch and button will be described in detail in the function description.

The SMC card interface unit 160 is for connecting an SMC card, which is an external expansion memory of a portable device, and allows the microprocessor 110 to store data to or read data from the SMC card 102. To be. When the MMC card is used as the expansion memory 102, the SMC card interface 160 should be changed to the MMC card interface, and when the hard disk is used, it should be changed to the hard disk controller.

The flash memory 162 stores software for executing the microprocessor 110 and is a read / write nonvolatile memory capable of writing new data. The USB interface unit 170 is connected to a computer via a USB cable 106 to enable communication between the portable MP3 changer and the computer in a USB manner.

The LCD driver 180 and the LCD 182 display information such as operation status of the device, various contents, music song names, etc. under text, text, and graphics under the control of the microprocessor 110, and the built-in microphone 184 is a user. The audio signal is converted into an electrical signal and provided to the audio processor 130, and the speaker 186 generates a sound wave according to the analog signal output from the audio processor 130, so that the user can hear it. In this case, when the headset 104 is inserted into the terminal, the built-in microphone 184 and the speaker 186 are blocked, and the microphone and the earphone in the headset 104 are operated.

2 is a schematic diagram showing an example of a portable MP3 changer according to the present invention.

2, a character for language learning is displayed on the LCD screen of the portable MP3 changer 100 according to the present invention, and a title 194, a volume 195, and an operation of the corresponding content are displayed at the bottom of the screen. Status 196-199, the selected channel 193, etc. are displayed. On the right side of the screen, there is a switch 158 for turning on / off the radio function, and on the lower side, up (151), down (152), play (153), rear navigation (REW: 154), fast forward (FF: 155). ), Recording (RD: 156), changer 157, and the like, the function of each button is shown in Table 1 below.

designation sign function work + volume up down - Volume down play ▶ play Rear search ◀◀ Fast forward navigation Forward search ▶▶ Fast seek backward Burning RD Store microphone input in memory Select function CHANGER MP3 player, language learning, learning promotion

3A is an example showing a software configuration of a portable MP3 changer according to the present invention, and FIG. 3B is an example showing a database configuration of a portable MP3 changer according to the present invention.

3A and 3B, the software 310 of the portable MP3 changer according to the present invention includes an LCD driving driver 311 for controlling the LCD operation, and an audio control driver 312 for controlling the operation of the audio processor. ), A communication driver 313 for performing a communication function, an STT module 314 for converting and displaying a voice into a text, a voice recognition module 315 for performing voice recognition, a language learning module for language learning ( 317), an MP3 play module 316 for the MP3 play function, and a learning enhancer function module 318 for the learning enhance function. The data 320 according to the present invention is composed of an MP3 music file 321 for an MP3 player, a language learning file 322 for language learning, and an EEG stimulation file 323 for learning promotion. Each of the expansion memory cards may be stored separately or may be stored in one expansion memory card.

Figure 4 is a schematic diagram showing the piling path of the portable MP3 changer in accordance with the present invention, Figure 5 is a flow chart showing the piling procedure of the portable MP3 changer in accordance with the present invention.

4, the portable MP3 changer 100 according to the present invention is connected to a personal computer 410 such as a desktop computer, a notebook computer, a PDA, and the like through a USB cable 106, and the personal computer 410 is an ADSL or the like. It is connected to an ISP through a cable modem or the like and is connected to the service site 430. The service site 430 is provided with a web server and a database server to provide a web page through the Internet 420, and provides various MP3 music files, content for language learning, brain wave related data for learning promotion, and the like. The personal computer 410 has a dedicated application installed on the CD 412 distributed with the purchase of the portable MP3 changer. When the application is executed, the personal computer 410 can access the Internet 420 and download various data.

As described above, the portable MP3 changer is connected to the personal computer 410 to drive the software (501 and 502). Then, after accessing the site 430 and logging in, the necessary function is selected from various functions provided (503, 504). If a download for file download is selected, a desired file can be selected, and if a file is selected, the file is downloaded to a PC (505, 506). Once downloaded to the PC, this data is stored again in the expansion memory of the portable MP3 changer 100 (507).

6 is a schematic diagram showing the overall operation of the portable MP3 changer according to the present invention.

First, in order to operate the portable MP3 changer according to the present invention, necessary data such as MP3 files, language learning contents, brain wave data, and the like must be prepared. Such various data may be distributed in the form of external expansion memory or may be downloaded from the service site 430 as described above.

If the radio switch 158 is on, other functions are disabled and the portable MP3 changer acts as a radio receiver (601, 602). While operating as a radio receiver, the rear navigation (◀◀) 154 and forward navigation (▶▶) buttons 155 perform channel tuning, and the up / down buttons 151, 152 control volume. do.

After turning off the radio function, the user selects a desired function among a MP3 player function, a language learning function, and a learning promotion function by using a function button CHANGER 157 (603). In the default state, it operates as an MP3 player function, and each time the selection button 157 is pressed once, it sequentially moves to "language learning function-> learning promotion function-> MP3 player function".

If the MP3 player function is selected, the MP3 player operation procedure is performed as shown in FIG. 7 (604, 605).

Referring to FIG. 7, a list of MP3 files is read, and when a file is selected, a corresponding file is read (701 to 703). If the file is not selected, the user can select a desired song using forward search or backward search (706, 707, 708, 709). If the play button 153 is pressed after the song is selected, the song is played. If the pause button is pressed during playback, the play is paused (704, 705, 710, 711). Since the function of the MP3 player is the same as that of a conventional MP3 player, further description will be omitted.

Meanwhile, when the language learning function is selected, the MP3 changer according to the present invention performs the language learning function, and when the learning promotion function is selected, the learning promotion function is performed (606 to 609). Learning promotion function is to activate the brain activity by generating a signal of the frequency that stimulates the brain, such as MC square. Electroencephalogram is a record of the change in potential according to the activity of the brain. Alpha waves occur when the mind and body are stabilized and concentrated, and theta waves or delta waves are known to appear in the sleeping state. Therefore, in the learning promotion function, a specific signal is generated so that a user can generate an alpha wave by using EEG-related data.

FIG. 8 is an overall flowchart illustrating the language learning procedure shown in FIG. 6.

Referring to FIG. 8, when the language learning function is selected using the selection button 157, a main screen appears (S1). The main screen displays the learning mode selection part, score board part, status display box, end button, option button, and the like. Here, EPSODE-I and EPSODE-II are for selecting a learning mode, and each episode is divided into words (WORD), sentences (SENTENCE), and conversation (CONVERSATION) to display corresponding scores. The status display box shows the current learning mode and score.

In this main screen, the learning mode is selected (S2). The learning method of episode 1 (EPISODE I) and episode 2 (EPISODE II) is the same, and the contents are different. For example, episode 1 (EPISODE I) consists of the contents of the situation related to business (BUSINESS), episode 2 (EPISODE II) may consist of the contents related to life conversation, and more various episodes can be added as needed. It may be.

If episode 1 or episode 2 is selected for learning, the episode main screen appears (S3, S4). The episode main screen is composed of a unit select box, a status display box, and various buttons. That is, the entire language learning content is largely divided into episodes (EPISODE), each episode (EPISODE) is composed of a plurality of units (UNIT). In an embodiment of the present invention, episode 1 (EPISODE I) is content related to work, episode 2 (EPISODE II) is content related to daily life, and each episode (EPISODE) is composed of 20 units (UNIT). The types of learning to learn the selected unit are divided into word learning, sentence learning, and conversation learning.

In the episode main screen, the unit and the learning type are selected (S5). In other words, if you select the "WORD" button, you can learn the words of the unit (S6, S7), if you select the "SENTENCE" button, you can learn the sentences used in the unit (S8 If you select the "CONVERSATION" button, you can learn the whole conversation sentence of the unit (S10, S11).

9 is a detailed flowchart illustrating the word learning process shown in FIG.

After selecting a unit (UNIT) in the episode main screen and select the "WORD" learning, the word learning screen appears (901). The word learning screen is composed of an image box that can display an image screen suitable for the unit, an English word box (SPEAK THIS WORD), a word list box (WORD LIST) that displays the English word to be studied, and a Korean interpretation of the English word to be learned. INTERPRET to display, NATIVE'S SPECTRUM to display the spectrum and intonation of the standard pronunciation of the locals, YORS SPECTRUM to display the spectrum and intonation of the learner's pronunciation, status display It consists of a box. The status display box includes WORD, SENTENCE, CONVERSATION, LISTEN & WRITE selection buttons, a score box showing the scores of current and previous learning, control buttons, level setting buttons, and each Scores for each word are displayed. If you click on the score you learned earlier, you will hear the pronunciation again.

For word learning, the learner first sets the level LV. In an embodiment of the present invention, the level consists of 1, 2, 3, 4, and 5 (902). Each level has a different threshold. For example, Level 1 is defined as 50%, Level 2 as 60%, Level 3 as 70%, Level 4 as 80%, and Level 5 as 90%. The score is displayed only when the percentage is higher than%, and the next word can be learned when the learning is repeated more than 70% at least three times.

Referring back to FIG. 9, the learner clicks the level button on the word learning screen to set the level, and clicks the play button (▶) (903). When the play button 클릭 is clicked, the standard sound of the word currently being studied is output through the speaker and the spectrum and intonation for the standard word are displayed in the standard phonetic display box (904). These standard tones are standardized by averaging more than 5,000 pronunciations of the native speaker.

The learner hears the standard sound and learns the language while following the pronunciation of the word. At this time, the learner's voice is input through a microphone and then judged and evaluated by the voice recognition means (905, 906). That is, the input voice signal is analyzed by voice recognition technology, and then the degree of agreement is compared with the standard tone data 906a, and scores are given, and the spectrum and intonation of the learner's pronunciation are displayed on the learner's pronunciation display box.

Subsequently, if the evaluated learner's score is lower than a threshold of a previously set level, the score is not displayed and the learner is repeatedly learned about the current word. If the score of the evaluated learner is higher than the threshold, the score is displayed and counted (907 to 909). When the number of times of passing the level set for the current word is more than a predetermined number (for example, three times), the next word may be learned (910, 911). As described above, according to the present invention, the next word can be learned only when the predetermined level is passed more than a predetermined number of times, so that strict learning is possible, and the learner displayed through the standard pronunciation and the learner pronunciation display box displayed through the standard phonetic display box You can learn more precisely because you learn while comparing pronunciation.

FIG. 10 is a detailed flowchart illustrating a sentence learning process illustrated in FIG. 8.

If a unit (UNIT) is selected in the EPISODE main screen and the "SENTENCE" learning is selected, the sentence learning screen appears (1001). The sentence learning screen includes an image box for displaying an image screen suitable for a unit, a sentence box for displaying English and Korean sentences to be studied, and a sentence list box for displaying a list of English sentences to be studied. ), A standard phonetic display box for displaying the spectrum and intonation of the standard pronunciation of the locals, a learner phonetic display box for displaying the spectrum and intonation of the learner's pronunciation, and a status display box. In this case, the sentence box shows a "Show / Hide" button to show or hide a sentence, and an "Interpret" button for displaying or not displaying the Hangul interpretation. The status display box includes words, sentences, conversations, conversation and listening buttons, a scorebox showing the scores of the current and previous lessons, operation buttons, level setting buttons, The score for each sentence is displayed.

For sentence learning, the learner first sets the level LV. In an embodiment of the present invention, the level consists of 1, 2, 3, 4, and 5 (1002). Each level has a different threshold. For example, Level 1 is defined as 50%, Level 2 as 60%, Level 3 as 70%, Level 4 as 80%, and Level 5 as 90%. The score is displayed only when the percentage is higher than%, and the next sentence can be learned when the number of times exceeds 70% by repeating the learning at least three times.

Referring back to FIG. 10, the learner clicks the level button on the sentence learning screen to set the level, and clicks the play button (▶) (1003). When the play button (▶) is clicked, the standard sound of the sentence currently being studied is output through the speaker, and the spectrum and intonation for the standard sound of the sentence are displayed in the standard phonetic display box (1004).

The learner hears the standard sound and learns the language while following the pronunciation of the sentence. At this time, the learner's voice is input through a microphone and then discriminated and evaluated by the voice recognition means (1005, 1006). That is, the input voice signal is analyzed by voice recognition technology, and then the degree of agreement is compared with the standard sound data 1006a, and scores are given, and the spectrum and intonation of the learner's pronunciation are displayed on the learner's pronunciation display box.

Subsequently, if the evaluated learner's score is lower than the threshold of the previously set level, the score is not displayed and the learner repeats the current sentence. If the score is higher than the threshold, the score is displayed and counted (1007 to 1009). When the number of times of passing the level set for the current sentence is more than a predetermined number (for example, three times), the next sentence can be learned (1010, 1011). As described above, according to the present invention, the next sentence can be learned only when the predetermined level passes more than a predetermined number of times, so that strict learning is possible, and the learner displayed through the standard pronunciation and the learner's pronunciation display box displayed through the standard phonetic display box You can learn more precisely because you learn while comparing pronunciation.

FIG. 11 is a detailed flowchart illustrating the conversation learning process illustrated in FIG. 8.

If a unit (UNIT) is selected in the episode main screen and the "CONVERSATION" learning is selected, the conversation learning screen appears (1101). Conversation learning screen includes image box that can display image screen suitable for unit, sentence box which displays conversation sentences for each speaker to learn, speaker selection box, status display box, etc. Is displayed. In this case, the sentence box shows a button (Show / Hide) and a function button (Interpret) that does or does not display the Hangul interpretation, and the speaker select box listens to all the contents (Listen ALL) ) And Repeat ALL button. In the status display box, the word, sentence, conversation selection button, and score box, control button, level setting button, and WRONG SENTENCE showing the scores of the current and previous learning are displayed.

For conversational learning, the learner first sets the level LV. In an embodiment of the present invention, the level consists of 1, 2, 3, 4, and 5. Each level has a different threshold. For example, Level 1 is defined as 50%, Level 2 as 60%, Level 3 as 70%, Level 4 as 80%, and Level 5 as 90%. The score is only displayed when it is more than%, and the next step can be learned when the learning is repeated more than 70% at least three times.

Referring back to FIG. 11, the learner sets a level by clicking a level button on a conversation learning screen, and selects a speaker (SPEAKER) to be spoken among a plurality of speakers (1102 and 1103).

Then, when the play button (▶) is clicked, the standard sound of the conversation sentence currently being studied is output through the speaker. When the selected speaker turns, the learner waits to speak (1104 and 1105).

When the learner pronounces an appropriate sentence according to his / her role, the learner's voice is input through the microphone and then judged and evaluated by the voice recognition means (1107). That is, the input voice signal is analyzed by voice recognition technology, and then the degree of agreement is compared with the standard tone data 1107a to assign a score.

Then, if the evaluated learner's score is lower than the threshold of the previously set level, the current sentence is registered as the WRONG SENTENCE without the score appearing (1108, 1109), and if the threshold is greater than the threshold proceeds to the next sentence (1110). When a whole conversation is finished, the wrong sentence learning to guide the wrong sentences is guided, and the sentence learning is performed accordingly (1111, 1112). The sentence learning method is the same as before, so further explanation is omitted. On the other hand, if you click LISTEN ALL on the conversation learning screen, you can hear the whole sentence (1113, 1114).

As described above, according to the present invention, it is possible to perform a language learning function, a radio reception function, a learning promotion function, etc. together with the MP3 player function with the MP3 changer, thereby providing a wide variety of functions at low cost. In particular, since the device according to the present invention is portable, it can be learned anywhere, thereby increasing the learning effect, and it is convenient to use because it can download and use various learning contents from a service site.

1 is a block diagram showing the configuration of a portable MP3 changer according to the present invention;

2 is a schematic diagram showing an example of a portable MP3 changer according to the present invention;

3A is an example showing the software configuration of a portable MP3 changer according to the present invention;

Figure 3b is an example showing a database configuration of a portable MP3 changer according to the present invention,

4 is a schematic diagram showing a piling path of a portable MP3 changer according to the present invention;

5 is a flow chart illustrating a file loading procedure of a portable MP3 changer according to the present invention;

6 is a schematic diagram showing an overall operation procedure of the portable MP3 changer according to the present invention;

FIG. 7 is a flowchart illustrating a procedure of operating an MP3 player shown in FIG. 6;

8 is a flowchart illustrating a language learning procedure illustrated in FIG. 6;

9 is a flowchart illustrating a word learning procedure illustrated in FIG. 8;

10 is a flowchart illustrating a sentence learning procedure illustrated in FIG. 8;

FIG. 11 is a flowchart illustrating a conversational learning procedure shown in FIG. 8.

* Explanation of symbols for main parts of the drawings

100: portable MP3 changer 102: SMC card

104: headset 106: USB cable

110: MCU 120: broadcasting receiver

130: audio processor 140: MP3 decoder

150: key input unit 160: SMC card interface

162: flash memory 170: USB interface

180: LCD driver 182: LCD

184: microphone 186: speaker

Claims (8)

A liquid crystal display for displaying characters or graphics; Expansion memory for storing data; A communication port for communicating with a computer; An audio processor for converting an analog sound signal input through a microphone into digital audio data, converting the digital audio data into an analog sound signal and outputting the analog sound signal to a speaker, and up or down the volume according to a control signal; An MP3 decoder for decoding MP3 data; A key input unit including an up / down button for up / down a volume, a play button, a front navigation button, a rear navigation button, and a function selection button; A broadcast receiver for receiving a broadcast signal when the radio function is turned on; And When the MP3 player function is selected through the key input unit, the MP3 file stored in the expansion memory is read and provided to the MP3 decoder to be decoded, and the decoded digital audio data is transmitted to the audio processor. When the language learning function is selected, the language learning content is compressed and read from the expansion memory in an MP3 manner to be decoded by the MP3 decoder, and the decoded data is converted into characters in the STT module and displayed on the display means. Transmits the received data to the audio processor, compares the digital audio data and the decoded data inputted from the audio processor in the speech recognition module, and displays the matching degree on the display means. When the learning promotion function is selected, EEG-related data stored in the expansion memory in the MP3 manner is read and provided to the MP3 decoder to be decoded, and the decoded digital audio data is transmitted to the audio processor. Run the LCD driver 311 to display characters, pictures, graphics on the LCD (182), By executing the audio control driver 312 to pass volume control data for up / down the volume according to the user's key input to the audio processor to control the audio-related parameters, Run the communication driver 313 to communicate with the computer by USB, And a microprocessor for providing tuning data to the broadcast receiver to select a broadcasting station according to a preset signal. delete delete delete delete delete delete delete