KR200349625Y1 - the mp3 player - Google Patents

Abstract

The present invention relates to an MP3 player. More specifically, the flash disk storing the MP3 data is integrally formed with the main body to prevent foreign substances or dust from entering into the USB port, and at a low cost, as well as MP3 / WMA files. It aims to provide a portable MP3 player that can support FM radio, voice recording, etc., and can be implemented in the smallest form by reducing the number of parts.

Description

MP3 player {the mp3 player}

The present invention relates to an MP3 player, and more particularly, to an MP3 player that forms a flash disk storing MP3 data downloaded from a PC or the like integrally with a main body and receives and plays MP3 data from the flash disk.

In general, an MP3 player stands for Moving Picture Expert Group (MPEG) layer 3, which is one of the audio parts of MPEG technology. MPEG began with the announcement of MPEG1 and introduced MPEG2 due to a new need for an increasing number of multimedia data compression standards, and now MPEG4 for object-oriented multimedia communications. The first standardized MPEG1 consists of five parts, coding techniques for compressing and storing video and audio up to 1.5M bps in digital storage. Three audio coding schemes are defined in the audio section, one of which is called layer 1, layer 2, and layer 3, respectively.

Audio layers in MPEG compress data using the same coding technique known as cognitive coding. This is a technique using a masking effect applied by analyzing a hearing sense model of a person, which is a kind of trick using insensitivity of a human ear. That is, a masking effect refers to a phenomenon in which a small sound below a certain threshold is covered by a large sound, which includes frequency masking and temporal masking. By doing this, the amount of data can be compressed to a normal one-twelfth (compression ratio equivalent to 50 ordinary CDs) without compromising sound quality. This standardized MP3 makes it possible to enjoy CD-level music at low cost over a PC or network, and is used for digital audio broadcasting via satellite, real-time audio on demand (AOD) or online on-demand over the Internet. Music services are also available.

These MP3 players are only 30-70% smaller than cassette tape-insertable compact audio equipment or CD players, and MP3 players can reduce power consumption by not driving a motor. Thus, MP3 players can play for a long time and have many additional advantages, such as no need for a separate equipment such as tape or compact disc plate. However, in order to prevent the data from being volatilized after storing the audio data, a nonvolatile memory such as a flash memory should be provided inside the MP3 player.

As such, the MP3 player downloads and stores the compressed audio data required in the internal memory by connecting to a PC or a network. For example, assuming that the capacity of the internal memory is 32M bytes, the MP3 player can store audio data that can be played for about 60 to 70 minutes, and more audio data can be stored as the memory capacity becomes larger.

However, the MP3 player has a disadvantage in that data can be downloaded only when a system for a network interface such as a PC is provided. In addition, when the MP3 player downloads data, it uses a low speed interface such as an RS232C cable, which requires a lot of download time, and when using a high speed interface, an expensive interface must be separately provided.

In addition, a foreign matter or dust is introduced from the outside through the flash disk separated from the main body causing a problem of malfunction of the device.

Accordingly, the present invention has been made to solve the conventional problems as described above, an object of the present invention is to form a flash disk that stores MP3 data integrally with the main body, and to be detachable at the end of the flash disk. By forming the cover part, it can prevent the inflow of foreign substances or dust from the outside into the internal space, and can support the MP3 / WMA file as well as FM radio and voice recording at low cost. To provide a portable MP3 player that can be.

1 is a view showing the external configuration of the MP3 player according to the present invention and the external configuration of the cover portion coupled thereto,

2 is a view showing a front view of the MP3 player according to the present invention,

3 is a view showing a rear view of the MP3 player according to the present invention,

Figure 4 is a block diagram showing the internal configuration of the MP3 control module according to the present invention,

5 is an embodiment showing an MP-shaped player of the I-shape according to the present invention,

6 is a flowchart illustrating the overall operation of the MP3 player according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

100: cover 110: hanger groove

200: MP3 player 210: flash disk

220: main body 230: display unit

240: key input unit 340: CPU

350: memory unit 360: display unit

370: decoder unit 380: D / A conversion unit

The apparatus of the MP3 player of the present invention for achieving the above object is an MP3 player for restoring and reproducing compressed audio data, in the shape of an I, the upper end is easily at the end of the flash disk integral with the body of the MP3 player The cover consists of a heart-shaped or square-shaped hanger in the center so that it can be attached and detached, and the display consists of three to six rows of graphic LCDs with sapphire blue LED backlights. The WMA file is of course characterized in that the key input unit is configured to support FM radio, voice recording, and the like.

Hereinafter, a preferred embodiment of the MP3 player according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the external configuration of the MP3 player according to the present invention and the external configuration of the cover portion coupled thereto, the MP3 player 200 is characterized in that the flash disk 210, the main body 220, the MP3 player 200 It comprises a variety of key input means 240 for instructing the operation and the display means 230 for displaying the current situation and various data of the MP3 player 200 to the outside.

The flash disk 210 is integrally formed with the main body 220, and the cover part 100 is detachably connected to the connector 215 of the flash disk, and the main body 220 has a USB port 215 of the PC 150. MP3 data transmitted from -1) and MP3 data stored in the flash memory unit described later from the PC 150 according to the interface unit 330, slave mode, and host mode, which support data interchange. The controller includes a control unit configured to download the MP3 data or to apply the stored MP3 data to the MP3 player, and a flash memory unit to store the downloaded MP3 data from the PC 150 and extract and apply the stored MP3 data according to the controller's instructions. The flash disk 210 of the present invention uses a USB flash disk, and the USB flash disk is well known and thus will not be described in detail any further.

2 and 3 are views showing the front and rear views of the MP3 player according to the present invention, the flash disk 210 is formed integrally with the main body of the MP3 player 200, the end of the flash disk 210 A USB port 215-1 for coupling with the connector 215 is formed, and a key input unit 240 supporting the MP3 / WMA file, FM radio, voice recording, and the like is formed at the rear portion.

4 is a block diagram showing the internal configuration of the MP3 control module 300 according to the present invention, the MP3 control module 300 is a key input unit 310, USB port 320, interface 330, CPU 340, a memory 350, a display 360, a decoder 370, and a D / A converter 380.

The key input unit 310 serves to generate a key signal for indicating a specific operation of the MP3 player (for example, play, volume up / down, operation start / end, curve tack, etc.), and the MP3 / WMA file. Of course, it can support FM radio and voice recording. The USB port 320 is connected to the connector of the flash disk (220 in FIGS. 1 and 2), and serves to provide a movement path for packet data and MP3 data applied from the flash disk to the MP3 data request to the flash disk. Perform. The interface unit 330 is interconnected with the USB port 320 and serves to interface MP3 data applied from the flash disk and various data transmitted to the flash disk according to a communication standard.

The CPU 340 is configured as a microcomputer, and is connected to the key input unit 310 and the interface unit 330, and each component is configured to perform an operation corresponding to the key signal by arithmetic processing a key signal applied from the key input unit 310. It controls the unit collectively, and requests MP3 data from the flash disk to receive and instructs to apply the received MP3 data to a specific path. In addition, the CPU 340 is equipped with a USB host function for transferring the MP3 data applied from the flash disk via the interface unit 330 to a specific path.

The memory unit 350 is composed of DRAM or flash memory, which is interconnected with the CPU 340, stores an execution program for performing an operation of the MP3 player, and performs the operation according to the instruction of the CPU 340. It is programmed to The display unit 360 is connected to the CPU 340, serves to display data applied from the CPU 340 to the outside, and uses an LCD in the present invention.

The decoder unit 370 is composed of a digital signal processor (DSP), which is connected to the CPU 340, has a built-in buffer, delays the transmission speed, and converts MP3 data applied from the CPU 340 into original voice data (ie, , Digital data) to restore. The D / A converter 380 is connected to the decoder 370, and performs analog conversion of the decoded digital data to the speaker. Decompression requires a lot of resources, so you have to keep up to speed. Therefore, the operation speed can be matched by temporarily storing the decompressed digital data by embedding the operation delay buffer in the decoder unit 370. The voice signal processing D / A converter 380 preferably uses a sigma-delta converter capable of realizing a high resolution of 16 bits or more.

The key input unit 310, the interface unit 330, the CPU 340, the memory unit 350, the display unit 360, the decoder unit 370, and the D / A converter 380 are well known. The description will be omitted.

Figure 5 is an embodiment showing an I-shaped MP3 player according to the present invention, the upper end portion is configured with a cover portion formed in the center of the heart or square hook groove so that the flash disk end can be easily attached to the main body, It consists of 3 ~ 6 lines of graphic LCD, and the display unit is formed of high-quality LED backlight of sapphire blue, and the back of the display unit is composed of key input unit supporting FM radio and voice recording as well as MP3 / WMA file.

In this case, the hook groove 110 is formed at the end of the flash disk so that the wire 250 is applied to the hook groove so that it can be worn on the user's neck.

Hereinafter, the operation relationship for the MP3 player according to the present invention will be described in more detail with reference to the accompanying drawings.

5 is a flowchart illustrating the overall operation of the MP3 player according to the present invention.

First, it is checked whether the subscriber for the MP3 download service by the authentication server of the server computer unit (S400). It can check the subscribers of MP3 download service through the user's access ID and password in the server server part and establish MP3 database by gender, age, and hobby to provide various kinds of music service for user's purpose. have.

Next, if you are a subscriber to the MP3 download service, connect a flash disk (preferably a USB flash disk) to the USB port on your PC to download the desired MP3 data, and if you are a non-subscriber, send a blocking message and encourage membership. (S410 ~ S430).

As such, by checking the subscriber for the MP3 download service in the present invention, there is a good effect that can block illegal pornography service of adolescents in advance.

As such, the flash disk connected to the PC communicates using the USB standard, which includes easy expansion with PC peripherals, low cost, support of transfer speeds of 12M bytes or more per second, and support for compressed data and real-time data. . The USB standard also provides a standard interface between the combined devices. Here, the PC (ie, the host controller) controls all operations according to the data transmission, and the data transmission is performed through the USB packet. USB packets are called 'token packets' and are sent with the direction and type of the transaction, the USB device address, and the destination number. Therefore, the flash disk decrypts the address field and downloads the corresponding data. This role is performed by a controller embedded in the flash disk. If the desired data transfer is successful, the flash disk controller sends a handshake packet to tell the PC whether the data transfer was successful.

Next, the CPU of the MP3 player determines whether the operation of the MP3 player is started and whether a playback key has been input (S440). At this time, when operation start is input, the CPU executes an initial mode necessary for starting operation, and displays an initial state of the MP3 player (eg, whether a flash disk is installed or the remaining battery capacity). As a result of the determination in step S440, if the operation start and playback keys are not input, the processor waits. When the operation start and playback keys are input, the CPU requests MP3 data from the flash disk through the interface unit and receives the MP3 data ( S450). The received MP3 data is applied to the decoder unit to decompress (that is, decode) the decompressed data, and the decompressed data is analog-converted by the D / A converter (S460). In this case, the analog-converted data is amplified by an amplifying means (for example, a power amplifier), and the amplified analog data is output to the outside through a speaker (S470).

As such, the MP3 player of the present invention checks the MP3 download service for each subscriber to provide a high quality service, thereby maximizing profitability through technical cooperation with a flash disk manufacturer.

As described above, according to the MP3 player according to the present invention, since the flash disk storing the MP3 data is formed integrally with the main body, the MP3 player can be miniaturized into various shapes such as I type, ㅁ type, △ type, star type, and MP3 download. By checking the service by subscriber and providing high quality service, it has a good effect of maximizing profitability through technical alliance with flash disk manufacturers.

Claims (2)

An MP3 player for restoring and playing back compressed audio data, In the I-shape, the upper portion is formed of a cover portion 100 having a heart or square hook groove 110 formed at the center so that the end portion of the flash disk 210 which is integral with the main body 220 of the MP3 player can be easily detached. In the middle portion, the display unit 230 is formed of a high-grade LED backlight of sapphire blue by a graphic LCD of 3 to 6 lines, and on the back of the display unit 230, MP3 / WMA file, as well as FM radio and voice recording. MP3 player, characterized in that the key input unit 240 is configured to support such. The MP3 player according to claim 1, wherein the flash disk (210) applies a wire (250) to a hook groove (110) formed at an end thereof so as to be worn on a user's neck.