KR20000073605A - Mobile terminal for storaging audio data and Method for playing the audio data using the same - Google Patents

Abstract

PURPOSE: A mobile terminal for storing and playing audio data and a method thereof, is provided to perform a function of a general telephone set in a speech mode, and to receive/store audio data from external media such as computers and play the stored audio data in an audio storing/playing mode. CONSTITUTION: A mobile terminal for storing/playing audio data has a flash memory(230) and an ASIC chip(220). The flash memory(230) receives and stores audio data compressed in a predetermined type from an external medium(270) such as a computer in an audio storing/playing mode. The ASIC chip(220) restores audio data designated by a user. In the ASIC chip(220), a microprocessor(222) performs a function of a general telephone set to generate a control signal for providing a communication service to a user in a speech mode, and generates a control signal for storing/playing audio data in the audio storing/playing mode. An audio decoder(225) converts the audio data stored in the flash memory(230) into a pulse code modulation(PCM) data, according to the control of the microprocessor(222). A universal asynchronous receiver/transmitter(UART,227) provides a port for connection with the external medium, to receive audio data. And a user mode switch sets up a multi-function key and a user mode as user interface for designating and playing audio data stored in the flash memory(230).

Description

Mobile terminal for storaging audio data and method for playing the audio data using the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile terminal capable of storing and reproducing audio data. In particular, the present invention relates to a mobile terminal capable of reproducing audio data compressed in the form of Moving picture Experts Group1 layer3 (hereinafter referred to as MP3) according to a user's selection. A mobile terminal for storing and reproducing audio data and a method of reproducing audio data using the same are provided.

In general, MP3 (MP3) means MP1 layer 3 and is one of audio parts of MPEG technology.

MP3 data is an audio file format created using audio data coding technology and can compress existing audio data to about one-twelfth.

Therefore, the user can create an album composed only of his favorite music using MP3 data, and the use of the MP3 data with each other through the computer communication network with each other, the use is increasing significantly around the netizens.

Meanwhile, mobile terminals represented by PCS terminals using a code division multiple access (CDMA) scheme have now emerged as a necessity of modern man, exceeding 3 million subscribers.

1 is a block diagram illustrating a conventional mobile terminal.

Referring to FIG. 1, a radio frequency module 100 for amplifying and filtering a high frequency signal received from an antenna, modulating and processing a downlink frequency, and transforming a high frequency signal into an intermediate frequency signal, and a basis for demodulating and transforming the intermediate frequency signal into a digital signal A band analog processor 110, an ASIC chip 120 for converting a digital signal into a Pulse Code Modulation (PCM) signal, a codec 130 for converting a PCM signal into an analog signal, It is composed of a speaker 140 for amplifying the analog signal and converts it into a voice signal that can be heard by the user. Here, the microphone 150 converts a voice signal into an electrical signal.

The AC chip 120 generates a control signal to the radio frequency module 100 and controls the operation of the mobile terminal and the radio frequency interface unit 121 that receives the feedback signal of the radio frequency module 100 accordingly. Microprocessor 122, a CDMA processor 123 for converting a digital signal into a signal division multiple access method, and a keypad (not shown) and a ringer (Ringer) for connecting the microprocessor 122 To a universal asynchronous transmit / receive interface (UART) 126 that provides an interface 124, a vocoder 125 for compressing and converting PCM data according to the density of the voice signal, and a port for connecting to an external medium such as a computer. It is composed.

The transmission / reception operation of the conventional mobile terminal configured as described above will be described next.

First, when a user inputs a voice signal by hooking off the user, the microphone 150 converts the voice signal into an electrical signal and transmits the voice signal to the codec 130.

The codec 130 samples an analog signal received from the microphone 150, converts the analog signal into a PCM signal, and transmits the same to the vocoder 125 of the AICchip 120, and the vocoder 125 compresses the PCM signal and performs a CDMA processor. 123 multiplies the compressed PCM signal by the PN code to spread. Then, the baseband analog processing unit 110 converts the spread signal into an analog signal for transmission in the wireless section, and the antenna amplifies the analog signal and transmits it in the wireless section.

On the other hand, since the operation at the time of signal reception of the mobile terminal reverses the operation at the time of transmission, description thereof is omitted.

However, such a conventional mobile terminal does not implement a function of constantly storing audio data input by the user through an external medium and playing the designated audio data according to the user's selection, and thus cannot provide various audio services to the user.

Therefore, in order to reproduce audio data, a user must purchase a separate device, for example, an MP3 player capable of reproducing MP3 data.

This is expensive because the MP3 player must be purchased in addition to the mobile terminal, and also inconvenient to use the mobile terminal and the MP3 player at all times when listening to music and making a call while moving.

Accordingly, an object of the present invention has been made in view of the above-mentioned prior art, and when the "call mode" according to the user mode selected by the user performs the same function as a normal telephone and the "audio storage and playback" mode In one embodiment, a mobile terminal for receiving and storing audio data from an external medium such as a computer and reproducing the stored audio data and a method of reproducing audio data using the same are provided.

According to one aspect of the present invention, a mobile terminal for storing and reproducing audio data includes a memory for storing audio data compressed in a predetermined format, and a communication service in a call mode according to a use mode. A microprocessor generating a first control signal and generating a second control signal for storing and reproducing the audio data in the memory in the audio storage and playback mode; and the audio stored in the memory according to the second control signal. And a decoder for converting the data into pulse code modulation (PCM) data.

Preferably, the memory includes audio data compressed in the MPEG1 layer 3 format.

According to another aspect of the present invention for achieving the above object, the audio data reproduction method of the mobile terminal in the mobile terminal having a memory, a decoder and a microprocessor, the step of checking the usage mode in the microprocessor and And, when the check result indicates that the communication mode is provided in the call mode, the audio data compressed in a predetermined format is received from the external medium in the audio storage and playback mode, and the microprocessor enables the memory. Enabling the display to display an index of the stored audio data on a liquid crystal display window, converting the audio data having an index according to a user's selection into PCM data at the decoder; To reproduce the PCM data as an audio signal Consists of steps.

Preferably, when a call is requested during the reproduction of the audio data, the call is automatically switched to a call mode to connect the call, and when the call ends, the call is automatically switched to an audio play mode to play the interrupted audio data.

Also, the audio data compressed in the predetermined format includes audio data compressed in the MPEG1 Layer3 format.

1 is a block diagram showing a conventional mobile terminal.

2 is a block diagram illustrating a mobile terminal for storing and playing back audio data according to the present invention;

3 is an operation flowchart of a mobile terminal for storing and playing back audio data according to the present invention;

4 is a front view of a mobile terminal for storing and reproducing audio data according to an embodiment of the present invention.

5A to 5D are views illustrating a liquid crystal display of a mobile terminal when playing audio data according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

200: radio frequency module 210: baseband analog processing unit

220: ASIC Chip 230: flash memory

240: Codec 250: Speaker

260: microphone 270: external medium (computer)

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

The mobile terminal for storing and reproducing audio data according to the present invention further includes a flash memory and an audio decoder to provide a communication service to a user by performing the same function as a normal telephone in the "call mode", and the "audio storage and In the case of the "playback mode", audio data compressed in a predetermined format is received from an external medium such as a computer and stored in a flash memory, and then the audio data designated by the user is reproduced as an audio signal using an audio decoder.

2 is a block diagram illustrating a mobile terminal for storing and reproducing audio data according to the present invention.

Referring to FIG. 2, the mobile terminal for storing and playing back audio data according to the present invention is a flash memory that receives and stores compressed audio data in a predetermined format from an external medium such as a computer in the "audio storage and playback mode". 230 and an ASIC chip 220 for restoring audio data designated by a user.

Here, the AC chip 220 generates a control signal for providing a communication service to a user by performing the same function as a normal telephone in the "call mode" according to the use mode, and the "audio storage and playback mode" In this case, the microprocessor 222 generates control signals for storing and reproducing audio data, and the audio decoder converts audio data stored in the flash memory 230 into PCM data under the control of the microprocessor 222. 225 and a universal asynchronous transmission / reception interface (UART) 227 for receiving audio data by providing a port connected to an external medium such as a computer.

In addition, the mobile terminal for storing and playing back audio data according to the present invention includes a use mode switch for setting a multi function key and a use mode as a user interface to designate and play audio data stored in the flash memory 230. do.

The flash memory 230 is a memory device capable of writing and erasing audio data. Accordingly, the flash memory 230 is connected to an external medium such as a computer through the RS 232C of the universal asynchronous transmission / reception interface (UART) 227, which is a 25-pin connector, to receive and store audio data. At this time, the audio data includes MP3 (MP3) data.

The mobile terminal configured as described above operates in the following use mode according to a function selected by the user.

The first is a "call mode" which operates in the same manner as a conventional mobile terminal, and provides a communication service to a user in a conventional operation.

The second is an "audio storage and playback mode" for storing and playing back audio data. The user sets the mobile terminal to "audio storage and playback mode" by operating a keypad usage mode switch, and then flash memory ( If at least one of the audio data stored at 230 is specified, the mobile terminal automatically plays the audio data designated by the user in order.

That is, the operation in the "audio storage and playback mode" of the mobile terminal according to the present invention is as follows.

First, when the user sets the usage mode of the mobile terminal to the "audio storage and playback mode", the microprocessor 222 detects this and enables the flash memory 230 so that the audio decoder 225 can access it. Then, the flash memory 230 is checked to display the index of the stored audio data (for example, the name of the song) in a menu format on the liquid crystal display.

In this case, if the audio data is not stored in the flash memory 230, the user may receive the arbitrary audio data by connecting the general purpose asynchronous transmission / reception interface 227 to an external medium.

Then, the user operates the multi-function key with reference to the liquid crystal display to designate the index of audio data to be reproduced.

Then, the audio decoder 225 receives audio data having a user-specified index from the flash memory 230 and converts the audio data into PCM data under the control of the microprocessor 222.

Since the PCM data is a digital signal, it is converted into an analog signal through the codec 240 and transmitted to the speaker. The speaker 250 amplifies the analog signal and then converts it back into an audio signal (voice signal) that can be heard by the user. Thus, the audio data specified by the user is played back.

As such, the mobile terminal for storing and reproducing audio data according to the present invention is stored in the flash memory 230 under the control of the microprocessor 222 when the user sets the usage mode to the "audio storing and reproducing mode." The audio data is reproduced using the audio decoder 225.

3 is an operation flowchart of a mobile terminal for storing and reproducing and reproducing audio data according to the present invention.

Referring to FIG. 3, the operation of the mobile terminal for storing and reproducing audio data is first driven when the user "on" s the power (S300).

In the "call mode", a communication service is provided to a user by performing the same operation as a conventional mobile terminal.

The microprocessor of the mobile terminal detects whether the user switches the usage mode to the "audio storage and playback mode" (S310).

When the user switches the usage mode to "audio storage and playback mode" by operating the keypad's usage mode switch, the microprocessor detects that the mobile terminal is set to "audio storage and playback mode" and then enables flash memory. This allows the audio decoder to access the flash memory.

In addition, the microprocessor checks the flash memory and displays information on the stored audio data, that is, the total number of audio data, an index (song name), a playback time, and the like on a liquid crystal display (LCD) of the mobile terminal (S320).

When the user designates a desired index among the indexes of the audio data displayed on the liquid crystal display and presses the play button, the mobile terminal plays the audio data having the specified song name.

In this case, the user may designate a plurality of indices, and the mobile terminal stores all the specified indices and plays them in the specified order during playback.

When the user sets the "call mode" to the terminal again by operating the keypad, the mobile terminal releases the "audio storage and playback mode" and switches to the "call mode" (S330).

On the other hand, if there is a call request while playing audio data in the "audio storage and playback mode", the mobile terminal stops playing the audio data and automatically switches to the "call mode" and connects the call requested to the user. (S340). In addition, when the user ends the call, the user automatically switches to the "audio storage and playback mode" to replay the audio data that was interrupted.

4 is a front view of a mobile terminal for storing and playing back audio data according to an embodiment of the present invention.

Referring to FIG. 4, the mobile terminal includes three multi function keys for designating and reproducing a music name of audio data displayed on a liquid crystal display.

Multi-function keys are determined according to the mode of use of the mobile terminal and are displayed in the form of icons on the liquid crystal display. In the "call mode", "call", "message", "end / power" functions, and "audio storage and In the "Play Mode", the microprocessor functions as a 'play', 'forward', 'backward', 'pause' and 'stop' function so that the microprocessor can index and play the audio data displayed on the LCD.

The multi-function key is designed to be used even when the flip of the mobile terminal is closed.

5A to 5D are diagrams for showing contents displayed on a liquid crystal display when a mobile terminal plays MP3 data according to an embodiment of the present invention.

Referring to FIG. 5A, when the user sets the mobile terminal to the "audio storage and playback mode" by operating the use mode switch of the keypad, the total number of audio data currently stored in the flash memory is displayed on the liquid crystal display.

At this time, when the user presses the right key among the three multi function keys, the audio data is sequentially played in the order stored in the flash memory. The right key at this time functions as a 'play' of the audio data.

However, when a user wants to play only a part of audio data stored in the flash memory, pressing the left key among three multi-function keys displays all indexes of MP3 data stored in the flash memory on the liquid crystal display. This is shown in Figure 5b.

If the user does not want to listen to the song name displayed on the LCD, the user presses the left key continuously to scroll the screen so that the next index is displayed. The left key at this time functions as 'screen scroll'.

When the song you want to listen to is displayed while the screen is scrolling, the user presses the right key to select the desired song. The right key at this time functions as a 'song memory' and the user can designate a plurality of songs.

When the user designates a plurality of songs, the mobile terminal stores all of the specified songs.

When the user has finished specifying all the desired songs, the user presses the center key to play the specified songs. The middle key plays the audio data for all the songs designated by the user.

While the user-specified audio data is playing, the remaining time of the currently playing song is displayed on the LCD, and the three multi-function keys function as 'backward', 'pause', 'forward' and 'stop'. The corresponding icon is displayed on the liquid crystal display window. This is shown in Figures 5c-5d.

'Back' corresponds to the left key, and 'Back' corresponds to the right key. And 'pause' is to press the middle button once, 'pause' is performed by pressing the middle button twice.

That is, the user can move to the next song while playing the audio data using three multi function keys. You can return to the previous song, pause, etc.

On the other hand, if a call is requested during the reproduction of the audio data, the liquid crystal display window is switched to the screen according to the "call mode".

As described above, according to the present invention, the mobile terminal can be used as a telephone and a player for audio data according to the use mode. Therefore, the user does not have to purchase a separate MP3 player to listen to music using audio data. This has the effect of being saved.

In addition, since the user does not have to carry both the mobile terminal and the MP3 player at the same time, it is convenient, and the mobile terminal can provide various audio services to the user by using audio data such as MP3 data.

Claims (5)

A memory for storing compressed audio data in a predetermined format; The first control signal for providing a communication service is generated in the call mode according to the use mode, and the second control signal is generated for storing and playing the audio data in the memory in the audio storage and playback mode. With a microprocessor, And a decoder for converting the audio data stored in the memory into PCM (Pulse Code Modulation) data in accordance with the second control signal. The method of claim 1, wherein the memory, A mobile terminal for storing and reproducing audio data, comprising: storing audio data compressed in an MPEG1 layer 3 format. A mobile terminal having a memory, a decoder and a microprocessor, Checking a usage mode in the microprocessor; Providing a communication service in a call mode as a result of the check, receiving audio data compressed in a predetermined format from an external medium in an audio storage and playback mode, and storing the compressed audio data in the memory; Enabling the memory to enable the memory, inspecting the memory, and displaying an index of stored audio data on a liquid crystal display window; Converting audio data having an index according to a user's selection into PCM data at the decoder; And reproducing the PCM data as an audio signal. 4. The method of claim 3, wherein when a call is requested during the playback of the audio data, the mobile device automatically switches to a call mode to connect the call, and when the call ends, automatically switching to an audio play mode to play the interrupted audio data. An audio data reproduction method of a mobile terminal. The method of claim 3, wherein the audio data compressed in a predetermined format includes audio data compressed in an MPEG1 Layer3 format.