KR100349467B1 - Audio player having character data reproduction functions - Google Patents

Abstract

The present invention is a technology for synchronously reproducing and displaying character data during reproduction of audio data produced using audio data compression coding technology. The audio player for restoring and reproducing compressed coded audio data includes compressed coded audio data and characters. A storage memory unit comprising a flash memory for storing data; A memory card mounting portion for attaching and detaching a memory card storing compressed coded audio data and text data as an auxiliary storage in addition to the storage memory; An audio data reproduction processing unit for restoring and reproducing audio data from the storage memory unit or the memory card; A character reproduction processing unit for reproducing the character data read out from the storage memory unit or the memory card in synchronization with the audio data; And a display for displaying the character data reproduced in synchronization with the audio data. The audio player further includes a receiver for receiving a compressed data file supplied from a broadcasting station, PC communication, the Internet, or a PC, and stores the compressed data file input through the receiver. This allows you to store and enjoy your favorite music files without the need for a drive such as a magnetic tape or compact disc, or to encode textbooks and news broadcasts into data compression coding files for storage and playback of text along with voice playback. Therefore, it is effective to learn foreign languages without having to go to academy.

Description

Audio player having character data reproduction functions

The present invention relates to an audio player having a text data reproducing function. More particularly, the present invention relates to an audio player having a text data reproducing function. It relates to an audio player.

As a storage medium of the conventional audio reproducing technology, recording quality, magnetic tape, compact disc (CD), laser disc (LD), hard disc (HD), and MIDI (MIDI) have been developed. Complex drive mechanisms such as turntables for record players, tape drive decks for audio players, laser disk drive tables, hard disk drives and MIDI disk drives for driving media were required. As a result, the maintenance mechanism is inconvenient to avoid the failure of the drive mechanism even after the hassle of changing the storage medium, and the drive mechanism itself may cause noise during reproduction because the vibration is generated by the motor or the like. In addition, since the driving mechanism itself is large, it has been limited in making it compact to carry.

In order to solve this problem, MPEG audio layer III, which has been standardized by the Moving Picture Experts Group (MPEG), which was recently formed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) to standardize the compression and multiplexing of video and sound, Portable MP3 players for audio playback have been commercialized and are in the limelight. MPEG audio layer I is a technique that removes and compresses only the frequencies hidden behind the treble through the frequency camouflage using psychoacoustic model, and layer II has a little more filter function than layer I to remove unnecessary information. Layer III is a compression technique that uses a Huffman coder to reproduce sound quality almost identical to the original sound at 128 kbps using much more filters than Layer II. The file constituted by the standardized MPEG audio layer III is called an MP3 file, and is composed of a header, an CRC (error detection code), audio data, and auxiliary data. The header contains a fixed bit of 32 bits and contains the layer, the sampling frequency, and the remaining frame information. In the MPEG audio standard, frames are represented by transmission and reception of binary data through a serial port, so that MP3 files can be played by decoding even if they are different from each other. The MP3 files are compressed using sub-convolution filtering that divides the audio signal into approximately 32 important frequency bands using a convolution filter and psychoacoustic models that remove unnecessary information not heard in the frequency bands. It has the advantage of maintaining sound quality close to and has the advantage that you can download MP3 files through Internet or PC communication or directly make and edit MP3 files directly from music CD and enjoy the desired songs. However, the existing MP3 player does not have a function of playing only music files and texts, and thus cannot be used as a portable karaoke system or a foreign language learner.

The technical problem to be achieved by the present invention is to provide an audio player having a text data reproduction function that can be used as a song practice apparatus, in order to solve the above-mentioned disadvantages.

Another object of the present invention is to provide an audio player having a text data reproduction function that can be used as a foreign language learner.

Another object of the present invention is to provide an audio player having a character data reproduction function having a function of receiving compressed coded data according to the MPEG audio layer standard transmitted from a broadcasting station.

Another object of the present invention is to provide a character data playback function having a function of compressing and storing uncompressed data transmitted through a broadcasting station, the Internet, and PC communication in connection with a personal computer according to the MPEG audio layer standard. It is to provide an audio player having.

1 is a block diagram schematically showing an audio player having a text data reproduction function according to the present invention.

FIG. 2 is a view illustrating in more detail the receiver shown in FIG. 1.

3 is a perspective view showing the overall appearance of an audio player having a character data reproduction function according to the present invention.

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

2 microcontroller, 4 storage

6 ... character data decoder, 8 ... display

10.Audio data decoder, 12 D / A converter

14 ... amplifier, 15 ... speakers

16 Earphones, 18 Voice processing unit

19 Mike, 20 Receiver

21, 29 ... input line, 22 ... control input

24 tuners, 26 antennas

28 Receiving port, 30 Battery

32 battery compartment, 40 memory card

42 Memory card slot, 44 Memory card contact pin

46 ... Memory card insert, 48 ... Memory card contact pin hole

100 ... Text playback audio player.

According to an aspect of the present invention, there is provided an audio player for restoring and compressing compressed coded audio data, comprising: a storage memory unit including a flash memory for storing compressed coded audio data and text data; A memory card mounting portion for attaching and detaching a memory card storing compressed coded audio data and text data as an auxiliary storage, in addition to the storage memory comprising the flash memory; An audio data reproducing processor for restoring and reproducing audio data stored in the memory card mounted in the storage memory unit or the memory card mounting unit; A character reproduction processing unit which reproduces the character data read out from the storage memory unit or the memory card in synchronization with audio data; And a display for displaying the text data reproduced in synchronization with the audio data.

Preferably, the audio player further comprises a receiving unit for receiving a compressed data file supplied from a broadcasting station, a PC (personal computer) communication, the Internet, or a PC, and storing the compressed data file inputted through the receiving unit in the storage unit. It is characterized by a storage box.

Preferably, when the data file input through the receiver is an uncoded data file, the encoder further comprises an encoder for compressing according to the MPEG audio layer standard. Preferably, the receiver transmits from a broadcasting station. A tuner for tuning and receiving a radio signal; And a receiving port connected to the PC with a parallel port cable to receive a desired data file from the Internet, PC communication, or a PC.

Hereinafter, with reference to the accompanying drawings, the configuration and operation of an audio player having a text data reproduction function according to a preferred embodiment of the present invention will be described in more detail.

Referring to Fig. 1, an audio player having a text data reproducing function of the present invention restores and reproduces audio and text data compressed in accordance with the MPEG audio layer III standard. To this end, in the present embodiment, a storage unit 4 for storing compressed coded audio data and text data, a microcontroller for reading and separating audio and text data stored in the storage unit 4 and performing overall control of the system ( 2), an audio data reproduction processing unit 10, 12, 14 for restoring and reproducing the audio data stored in the storage unit, a character reproduction processing unit 6 for reproducing the character data stored in the storage unit in synchronization with the audio data, and And a display 8 for displaying the reproduced character data.

The storage unit 4 may be preferably configured as a flash memory. When the audio data and the text data are not configured as a single bit stream, the storage unit 4 is separated into a flash memory so as to separately store the audio data file and the text data file. It can also be configured as an area.

The audio data reproducing processor receives audio data under the control of the microcontroller 12 and decodes the data encoded in accordance with the MPEG audio layer III standard. The audio data decoder 12 converts the decoded audio data into digital analog. A D / A converter 12 and an amplifier 14 for amplifying the result are provided. This amplified final audio output is output to the outside through the speaker 15 or the earphone 16.

The character data reproduction processing section includes a character data decoder 6 which receives character data under the control of the microcontroller 12 and decodes the same as the audio data. The decoded character data is not shown in the figure but is displayed on the display 8 in synchronism with the audio data under the control of a display controller.

The audio player having the character data reproducing function of the present embodiment is in addition to power on / off, PLAY, STOP, PAUSE, and high speed playback in order to control the output of the audio data and the character data. (FF), rewind (REW), volume control (VOLUME), recording (REC), the control input unit 22 is provided with a display off, etc., the air coded 21 compressed data in accordance with the MPEG audio layer standard And a receiving unit 20 for receiving a desired data file through the Internet or PC communication, and a voice processing unit 18 for processing and inputting voice data of the user through the microphone 19. The control input unit 22 can be used by appropriately combining the above-described buttons to reduce the number of buttons, it is apparent to those skilled in the art that it can be added and deleted any number of buttons other than the above-described buttons as the designer intended. Is omitted. In addition, although not shown in the drawings of the present embodiment, the operation software program of the audio player having the character data reproducing function of the present invention and the ROM in which various data are stored are the same as those of the conventional audio player. It will be omitted.

In this embodiment, the audio player includes a receiving unit for receiving a compressed data file supplied from a broadcasting station, a PC (personal computer) communication, the Internet, or a PC, and storing the compressed data file inputted through the receiving unit. In this case, the data encoded by the tuner 24 for receiving the airwave propagated signal from the broadcasting station through the antenna 26 and the input line 29 through the Internet, PC communication or PC can be stored. A receiving port 28 for receiving the file should be provided. The tuner 24 tunes and receives a radio signal transmitted from a broadcasting station, and the receiving port 28 is connected to a PC with a parallel port cable to receive a desired data file from the Internet, PC communication, or a PC.

In this case, although not shown in the drawing, preferably, if the data file input through the receiver is an uncoded data file, it should further include an encoder that compresses according to the MPEG audio layer standard.

As shown in Fig. 3, in the present embodiment, the storage unit 4 is provided with a memory card mounting unit 42, 44, 46 which makes it possible to attach and detach the memory card 40 storing data as an auxiliary storage unit in addition to the flash memory. ) Is included. The memory card mounting portion forms a hole in which the memory card 40 can be inserted in a part of the audio player of the present invention. In the present embodiment, the bottom surface is formed. In addition, a memory card mounting base 46 having pins 44 through which the pinholes 48 of the memory card 40 can be inserted is provided. The position of the memory card mount may be configured such that the memory card 40 is completely inserted into the player, or may be configured so that only a part thereof is inserted. In the case where it is fully inserted, a mechanism for detaching the memory card may be required, and it may be preferable to configure the device so that only a part thereof is inserted. As the memory card insertion mechanism, the memory card can be inserted into any portion of the memory card by inserting the batteries 30 into the battery container 32 instead of manually inserting the memory card through the memory card hole 42 as described above. It can also be configured so that the memory card is completely in contact with the memory mount by the spring action when it is placed in the bucket, and the cover is closed.

According to Fig. 3, the audio player having the character data reproducing function according to the present invention has a general appearance similar to that of a conventional general audio player, and has a character reproducing function, so that the display 8 for displaying the reproduced characters is provided. Is slightly larger, and since the insertion port 42 for inserting the memory card 40 and the receiving port 28 for receiving a desired data file from the outside can be configured to the extent that the bottom surface is formed, the overall size Does not grow. In addition, although the battery may be used as the power supply unit in the present embodiment, preferably, the AC / DC voltage converter may be further provided using commercial AC, and the description thereof will be omitted by the skilled person.

Based on the configuration of the present invention described above will be described in more detail the operation. The present invention stores a data file compressed by MPEG audio layer III in the flash memory 4 and separately reproduces audio data and text data from the stored data file. In order to solve the shortcomings of the interpretation could not be read, the existing simple portable audio player can be maximized as a portable song practice device or a foreign language learner. In this case, the data file may include only audio data or may have text data at the same time. If the data file contains only audio data, and if there is no other character data file, the audio data is decoded by the audio data decoder 10 under the control of the microcontroller 2 as in the prior art, and the D / A conversion and amplification are performed as described above. Output through the 15 and the earphone (16). Even in this case, when the user stores another character data file in the flash memory 4 through the memory card 40 or the receiving unit 20, the audio data is reproduced under the control of the microcontroller 2, and the input and stored characters are stored. By reproducing the data, the character data can be reproduced and displayed in synchronization with the audio data. In this case, audio data files and text data files may be stored separately in the same flash memory, or may be stored independently in different flash memories. The user can purchase the desired MP3 file (AOD: audio-on-demand) through the Internet or PC communication, and the user edits and manufactures the music file in the music CD as an MP3 file through a PC. You can also enjoy after storing in the storage (4).

On the other hand, when the audio data and the text data are simultaneously input and stored in a compressed coded form in the form of a bit stream, as described above, after separately reading out the audio data and the text data under the control of the microcontroller 12, The audio data is decoded and output by the audio data decoder 10 and the character data is decoded and displayed by the character data decoder 6.

Meanwhile, the analog voice input by the user through the microphone 19 is processed by the voice processing unit 18 and then supplied to the audio data decoder 10 under the control of the microcontroller 12, decoded, and then compressed. It is output like audio data. In this case, the user voice may be designed to pass through the audio data decoder 10 and the D / A converter 12 as they are, without being compressed coded as analog.

In addition, when a data file compressed according to the MPEG audio layer standard applied to the present invention is transmitted from a broadcasting station, the tuner 24 in the receiver 20 of the present invention receives a desired radio wave through the antenna 26. In addition, processing may be performed in real time so that the broadcast wave may be separately output as audio and text. In this case, the desired broadcast of the received broadcast station may be stored in the storage unit when the record button of the control input unit 22 is pressed. Of course, you can also recall data stored in the storage and delete it.

The present invention has been made possible by the development of semiconductor memory technology and the development of audio compression technology. The storage unit applied to the present invention is capable of compressing and recording a wave file, which is an MP3 music file, according to the MPEG audio layer standard (CD sound quality). In this case, playback can be performed for about 1 minute with a capacity of approximately 10 Mbytes. When used as a song practice and a foreign language learner, since the general human voice frequency is 20Hz-20kHz, recording and playback according to the above standards is sufficient without degrading sound quality, so it can be reproduced with about 10% memory capacity of MP3 files. In the case of recording and reproducing sentence by sentence, when the sentence is over to another sentence, recording and reproducing is possible without increasing the memory capacity at all. Therefore, 64 Mbyte of memory capacity is sufficient.

In addition, since the display applied to the present invention is not for moving picture reproduction, a color display is not necessary, and an economical black and white liquid crystal (LCD) display will be sufficient.

Voice recording function helps users to practice singing and learning foreign languages. While the device is playing, press the voice recording button to record the user's pronunciation and press the voice playback button to compare the pronunciation of the device with the user's pronunciation. The recording and playback time may be set within 1 minute in consideration of the long sentence.

As described above, the present invention can be enjoyed by storing the desired music files in the memory without the need of a conventional storage medium drive device, can download the desired MP3 files through the Internet or PC communication, MP3 files directly from the music CD After editing and saving, you can practice singing while watching the displayed characters while enjoying the high quality sound easily. In addition, the language textbooks and news broadcasts can be encoded and stored in a data compression coding technique, and then the voice can be reproduced along with the text playback.

Claims (6)

A storage memory unit comprising a flash memory storing compressed coded audio data and character data for storing and restoring compressed coded audio data; A memory card mounting portion for attaching and detaching a memory card storing audio data and text data as an auxiliary storage in addition to the storage memory comprising the flash memory; An audio data reproducing processor for restoring and reproducing audio data stored in the memory card mounted in the storage memory unit or the memory card mounting unit; A character reproduction processing unit which reproduces the character data read out from the storage memory unit or the memory card in synchronization with audio data; And a display for displaying text data reproduced in synchronization with the audio data. A tuner which tunes and receives a radio signal transmitted from a broadcast station to receive a compressed data file supplied from a broadcast station, PC (personal computer) communication, the Internet, or a PC; And a receiving unit having a receiving port connected to the PC via a parallel port cable to receive a desired data file from the Internet, PC communication, or PC, and storing the compressed data file input through the receiving unit into the storage memory unit. In the If the data file input through the receiver is an uncoded data file, further comprising an encoder for compressing according to the MPEG audio layer standard, and storing the compressed data file input through the encoder in the storage memory. An audio player having a text data playback function. delete delete delete delete delete