KR100339100B1 - Compound Mobile Telephone Terminal Apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite mobile terminal device, and more particularly, to a composite mobile phone terminal device capable of reproducing a digital audio file in a mobile telephone terminal device.

The present invention provides an antenna for transmitting and receiving a high frequency signal, an RF / IF sub-system for converting the high frequency signal into an intermediate frequency signal and converting the intermediate frequency signal into a high frequency signal, and converting the intermediate frequency signal into a digital signal and then converting the digital signal into a digital signal. A BBA unit for converting a signal into an intermediate frequency signal, a peripheral unit serving as a display, a keypad, and a power supply unit, a ROM storing a system program, a DRAM temporarily storing data generated during a system processing operation; A composite mobile phone terminal having a flash ROM for storing various information data and a compressed digital MPEG audio file, comprising: converting a digital signal of the BBA unit into PCM digital audio data and outputting the compressed digital MPEG audio file from the flash ROM; Read, temporarily store in the DRAM, and then simultaneously select a function An MSM unit which outputs a signal and an output selection signal, converts the PCM digital audio data to be transmitted into a digital signal and applies the digital signal to the BBA unit; A bus interface and a controller for generating a control signal and inputting / outputting the compressed digital MPEG audio file according to the control of the MSM unit; An MPEG audio reproducing unit reconstructing the compressed digital MPEG audio file into PCM digital audio data according to a control signal of the bus interface and the controller; A digital multiplexer unit for selecting one of the PCM digital audio data output from the MSM unit and the PCM digital audio data reconstructed by the MPEG audio reproduction unit according to the function selection signal of the MSM unit; Converts the PCM digital audio data selected by the digital multiplexer into an analog audio signal, selects and outputs an audio output unit according to the output selection signal of the MSM unit, and receives an analog audio signal from a microphone and converts the PCM digital audio data into PCM digital audio data. A codec section; And a buffer unit for applying the PCM digital audio data converted by the audio codec unit to the MSM unit.

Description

Compound Mobile Telephone Terminal Apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite mobile terminal device, and more particularly, to a composite mobile phone terminal device capable of reproducing a digital audio file in a mobile telephone terminal device.

Due to the development of digital signal processing technology, digital technology has been applied to mobile phones in recent years, and it is rapidly expanding in popularity.It is also compatible with devices such as PCs through digitalization and data service functions such as e-mail or PC communication. As the back light becomes important, the performance of the CPU is also improving.

Looking at the configuration of such a conventional mobile phone terminal, as shown in Figure 1, an antenna 11 for performing a function of transmitting and receiving a Radio Frequency (RF) signal, a high frequency transmitted and received through the antenna 11 and RF / IF Subsystem 12, which performs intermediate frequency (IF) processing, and MSM (Mobile Station), which is a central computing device for control and modem function signal processing for each block. 13, a base band analog (BBA) unit which receives an intermediate frequency signal from the corresponding RF / IF sub-system unit 12, performs modulation / demodulation processing, and performs an interface function with the corresponding MSM unit 13; Audio coder and decoder 15 for converting a digital audio signal into an analog signal or converting an input analog voice signal into a digital signal, and for storing various programs and information of the system. A memory and peripheral unit 16 for providing functions such as a display and keypad of a Mori and LCD, a power amplifier unit 17 for amplifying a small voice signal output from the corresponding audio codec unit 15; A speaker 18 for outputting voice sound with respect to the amplified signal applied from the power amplifier unit 17, and an op amp unit 19 amplifying the small signal input to the corresponding audio codec unit 15. And a microphone 20 for converting a voice signal into an electrical signal and applying the same to the op amp unit 19.

In addition, digital video and audio data compression technology has been developed to facilitate the processing and transmission of digital audio data having a large data size, and recently, a moving picture expert (MPEG) audio file (MP3) is stored in a flash memory or the like. Has been developed to play MP3 player device.

As shown in FIG. 2, the conventional digital audio reproducing apparatus is a central processing unit of the system. The microprocessor unit 21 controls each block and stores various programs of the system. ROM (Read Only Memory) 22, Dynamic Random Access Memory (DRAM) 23 for temporary storage of data in the program processing operation of the microprocessor unit 21, and Flash ROM for storing digital audio files ( 24), an audio codec unit 25 for converting a digital audio signal into an analog signal or converting an input analog voice signal into a digital signal, and restoring the digital audio data compressed by the MPEG audio standard to restore the corresponding audio codec unit. MPEG audio reproduction unit 26 for outputting in PCM (Pulse Code Modulation) data format that can be processed by 25, and the corresponding microprocessor A bus interface and control logic unit 27 for the host bus interface and control function between the unit 21 and the MPEG audio reproduction unit 26 and a signal for amplifying the analog audio signal output from the corresponding audio codec unit 25. Amplification sections 28 and 30, a speaker 29 for outputting the amplified signal applied from the signal amplification section 28, and a headphone stereo jack for outputting the amplified signal applied from the signal amplification section 30; And 31, a peripheral portion 32 such as an LCD, a keypad, a power supply, and the like, and a card controller 33 for interfacing various memory cards for expandability of digital audio data storage. have.

Briefly looking at the operation of the mobile phone terminal configured as described above are as follows.

First, as shown in FIG. 1, the reception operation of the telephone is input to the RF / IF sub-system unit 12 through a high frequency signal input through the antenna 11, and to the RF / IF sub-system unit 12. Control of the required frequency band of the input high frequency signal and the magnitude of the received signal is performed by the MSM unit 13, converted into an intermediate frequency through a filter and a mixer, and input to the BBA unit 14.

Accordingly, the intermediate frequency signal input to the BBA unit 14 is demodulated according to the corresponding standard and converted into a digital signal, and the converted digital signal is input to the MSM unit 13 again, and in the MSM unit 13 The digital signal is stored in the memory 16 and the related information is displayed on the LCD. Also, the CODEC in the MSM unit 13 converts the digital signal into a PCM digital audio signal. Applied to (15).

The audio codec unit 15 converts the PCM digital audio signal applied from the MSM unit 13 into an analog audio signal through a digital to analog converter (DAC), and the analog audio signal is a speaker ( Amplified through the power amplifier unit 17 for driving the 18 is output to the speaker 18.

Next, the transmission operation of the telephone is amplified via the op amp unit 19 so that the voice signal input through the microphone 20 such as a microphone is sufficient to be processed, as shown in FIG. The amplified voice signal is input to the audio codec unit 15.

Thus, the analog to digital converter (ADC) in the audio codec unit 15 converts the audio signal amplified by the op amp unit 19 into PCM digital data and applies the same to the MSM unit 13, and the MSM unit ( In 13), a digital signal converted through a modem block is input to the BBA unit 14 to be demodulated, and the demodulated digital signal is converted into a corresponding high frequency channel by the RF / IF sub-system unit 12. And output through the antenna 11.

On the other hand, the operation of the digital MPEG audio reproducing apparatus is digitally compressed from various memory cards through the flash ROM 24 or the card control unit 33 by a program recorded in the ROM 22, as shown in FIG. The MPEG audio file is read by the microprocessor unit 21 and temporarily stored in the DRAM 23 and input to the MPEG audio reproduction unit 26 through the bus interface and the control logic unit 27.

Accordingly, the digital audio data compressed by the MPEG audio playback unit 26 is restored to an audio signal of the original PCM digital format through an audio decoder and input to the audio codec unit 25. The analog voice signal is converted and output through the DAC, and the analog voice signal is amplified through the signal amplifier 28 and output to the speaker 29 or amplified through the signal amplifier 30 and the headphone stereo jack 31. Will be output as

However, in recent years, the expansion of personal mobile phones and digital audio playback devices has to be purchased from the user's point of view, so it is expensive and inconvenient to carry, and in terms of product implementation, there are redundant functions. There were many disadvantages of unnecessary parts, so the material cost was disadvantageous.

In order to solve the above-mentioned disadvantages, the present invention combines the functions of the mobile phone terminal and the digital audio playback device to reduce the duplication of the portable and easy to carry and provides information and entertainment to the user at a low cost, The purpose is.

In other words, the present invention provides a composite mobile phone terminal device capable of playing a compressed MPEG digital audio file having an extension of mpa and mp3 downloaded through a PC or an RF channel in a mobile phone terminal device. have.

1 is a block diagram showing the basic configuration of a conventional mobile telephone terminal.

Fig. 2 is a block diagram showing a conventional digital audio reproducing apparatus.

3 is a block diagram illustrating a composite mobile telephone terminal device according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

41: antenna

42: RF / IF Subsystem Part (Radio Frequency / Intermediate Frequency Subsystem)

43: BBA part (Base Band Analog) 44: peripheral device part

45: MSM part (Mobile Station Modem) 46: ROM (Read Only Memory)

47: Dynamic Random Access Memory (DRAM)

48: Flash ROM

49: bus interface and control unit

50: MPEG Audio Decoder

51: Digital Multiplexor

52: Audio Coder and Decoder

53: buffer 54, 56: signal amplifier

55: Speaker

57: Headphone Stereo Jack

58: OP Amplifier 59: Mike

The present invention for achieving the above object is an antenna for transmitting and receiving a high frequency signal, an RF / IF sub-system unit for converting the high frequency signal into an intermediate frequency signal and converts the intermediate frequency signal into a high frequency signal, and the intermediate frequency A BBA unit for converting a signal into a digital signal and a digital signal into an intermediate frequency signal, a peripheral unit serving as a display, a keypad, and a power supply unit, a ROM for storing a system program, and a system processing operation. A complex mobile phone terminal device having a DRAM for temporarily storing data to be stored, and a flash ROM for storing various information data and a compressed digital MPEG audio file, wherein the digital signal of the BBA unit is converted into PCM digital audio data and output. Read compressed digital MPEG audio files from the flash ROM and temporarily store them in the DRAM. An MSM unit which stores and outputs a function selection signal and an output selection signal, converts the PCM digital audio data to be transmitted into a digital signal and applies the digital signal to the BBA unit; A bus interface and a controller for generating a control signal and inputting / outputting the compressed digital MPEG audio file according to the control of the MSM unit; An MPEG audio reproducing unit reconstructing the compressed digital MPEG audio file into PCM digital audio data according to a control signal of the bus interface and the controller; A digital multiplexer unit for selecting one of the PCM digital audio data output from the MSM unit and the PCM digital audio data reconstructed by the MPEG audio reproduction unit according to the function selection signal of the MSM unit; Converts the PCM digital audio data selected by the digital multiplexer into an analog audio signal, selects and outputs an audio output unit according to the output selection signal of the MSM unit, and receives an analog audio signal from a microphone and converts the PCM digital audio data into PCM digital audio data. A codec section; And a buffer unit for applying the PCM digital audio data converted by the audio codec unit to the MSM unit.

The flash ROM may store the compressed digital MPEG audio file from a PC serial port through a UART port of the peripheral device unit or download the RF digital channel from a base station and store the downloaded digital RF audio file. A first buffer for storing an address applied from the first buffer; A second buffer for storing data applied from the MSM unit; A third buffer for storing write, read and wait control signals applied from said MSM section; And an address decoder configured to decode an address applied from the MSM unit to generate a chip select signal and apply the chip select signal to the MPEG audio reproducing unit, wherein the MPEG audio reproducing unit applies the chip select signal from the bus interface and the controller. Reads or writes the address and data of the bus interface and the controller according to a read control signal or a write control signal applied from the bus interface and the controller, and reads or records the address and data of the bus interface and the controller. And performing data transmission arbitration with the MSM unit. Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the hybrid mobile phone device according to the embodiment of the present invention includes an antenna 41, an RF / IF sub-system unit 42, a BBA unit 43, and a peripheral unit unit 44. ), MSM unit 45, ROM 46, DRAM 47, flash ROM 48, bus interface and control unit 49, MPEG audio playback unit 50, digital multiplexer unit 51, audio codec unit 52, buffer unit 53, signal amplifiers 54 and 56, speaker 55, headphone stereo jack 57, and op amp unit 58 And the microphone 59 is provided.

Here, the antenna 41 transmits and receives a high frequency signal of the mobile telephone terminal.

The RF / IF sub-system unit 42 converts a high frequency signal received through the antenna 41 into an intermediate frequency signal and applies the intermediate frequency signal to the BBA unit 43 and the intermediate frequency signal applied from the BBA unit 43. Is converted into a high frequency signal and transmitted to the antenna 41.

The BBA unit 43 converts an intermediate frequency signal applied from the RF / IF sub-system unit 42 into a digital signal, applies the digital signal to the MSM unit 45, and applies a digital signal applied from the MSM unit 45. The signal is converted into an intermediate frequency signal and applied to the RF / IF subsystem 42.

The peripheral unit 44 serves as a display, a keypad, a power supply, etc. of the LCD under the control of the MSM unit 45.

The MSM unit 45 controls each functional block and performs a modem function. The MSM unit 45 converts a digital signal applied from the BBA unit 43 into PCM digital audio data and applies it to the digital multiplexer unit 51. The function selection signal MUX_SEL is applied to the digital multiplexer unit 51 through the input / output port GPIO, the output selection signal EAR_MUTE * is applied to the audio codec unit 52, and the buffer unit 53 is applied. The PCM digital audio data applied through the modem block is converted into a digital signal and applied to the BBA unit 43. The compressed digital MPEG audio file stored in the flash ROM 48 is read and temporarily stored in the DRAM 47. The data is stored and applied to the bus interface and the controller 49 as addresses, data, and various control signals RD *, WR *, and WAIT *.

The ROM 46 stores a system program for controlling the operation of each component part.

The DRAM 47 temporarily stores data generated in the processing operation of the MSM unit 45.

The flash ROM 48 stores various types of information data and compressed digital MPEG audio files of the telephone.

The bus interface and the controller 49 perform host bus interface and control signal generation between the MSM unit 45 and the MPEG audio reproducing unit 50. Various control signals RD *, WR *, and WAIT * are applied to the MPEG audio reproducing unit 50 and the chip select signal CS * is decoded by decoding the address applied from the MSM unit 45. The MPEG audio player 50 is applied to the MPEG audio player 50.

The MPEG audio reproducing unit 50 restores the digital audio data compressed by the MPEG audio standard and converts the digital audio data into PCM digital audio data. The MPEG audio reproducing unit 50 receives the chip selection signal from the bus interface and the controller 49 and recognizes the operation as its own operation. And a compressed digital MPEG audio file applied through the bus interface and the controller 49 according to the read control signal RD * or the write control signal WR * applied through the bus interface and the controller 49. It restores the audio data to the digital multiplexer unit 51, and mediates data transmission with the MSM unit 45 by the wait control signal WAIT * applied through the bus interface and the controller 49. Perform.

The digital multiplexer unit 51 is applied from the MPEG audio reproduction unit 50 and the PCM digital audio data applied from the MSM unit 45 according to the function selection signal MUX_SEL applied from the MSM unit 45. The audio codec unit 52 is multiplexed to select one of the PCM digital audio data.

The audio codec unit 52 converts the PCM digital audio data applied from the digital multiplexer unit 51 into an analog voice signal using a DAC, and selects the output of the converted analog voice signal from the MSM unit 45. According to the signal EAR_MUTE * is applied to the signal amplifier 54 or the signal amplifier 56, the amplified voice transmission signal applied from the op amp 58 is converted into PCM digital audio data using an ADC The buffer is applied to the buffer 53 in synchronization with the transmission reference clock PCM_CLK and the synchronization signal PCM_SYNC applied through the digital multiplexer unit 51.

The buffer unit 53 applies the PCM digital audio data applied from the audio codec unit 52 to the MSM unit 45 with the same transmission delay time.

The signal amplifiers 54 and 56 amplify analog voice signals applied from the audio codec unit 52 and apply them to the speaker 55 and the headphone stereo jack 57, respectively.

The speaker 55 and the headphone stereo jack 57 output the amplified signals applied from the signal amplifiers 54 and 56 as voice.

The op amp 58 amplifies an electric signal applied through the microphone 59 and applies it to the audio codec 52.

The microphone 59 converts an input voice signal into an electric signal and applies the audio signal to the op amp unit 58.

The operation of the composite mobile telephone device according to the embodiment of the present invention configured as described above will be described by dividing into a mobile phone function and a compressed digital audio reproduction function.

First, referring to the operation of the mobile phone function, as shown in the configuration of FIG. 3, the operation of the conventional mobile phone terminal is similar, but the MSM unit 45 between the MSM unit 45 and the audio codec unit 52. The difference is that there is a digital multiplexer unit 51 which performs the multiplexing of the PCM digital audio data outputted from the PCM digital audio data outputted from the MPEG audio reproduction unit 50.

In detail, when receiving a high frequency signal through the antenna 41, the RF / IF sub-system unit 42 converts the corresponding high frequency signal into an intermediate frequency and inputs the BBA unit 43 to the corresponding BBA unit 43. ) Converts the intermediate frequency signal into a digital signal and inputs the converted digital signal to the MSM unit 45.

Accordingly, the MSM unit 45 stores the converted digital signal in the DRAM 47 and displays related information on the LCD, and converts the converted digital signal into PCM digital audio data using an internal vocoder to convert the digital signal. As a mobile phone selection signal applied to the multiplexer unit 51 and the function selection signal MUX_SEL is '1 (High)' through the general input / output port (GPIO), that is, to perform the operation of the mobile phone function. An output selection signal for selecting whether to apply to the digital multiplexer unit 51 and to output the output of the audio codec unit 52 through the speaker 55 or through the headphone stereo jack 57. (EAR_MUTE *) is applied to the audio codec unit 52.

Then, the digital multiplexer unit 51 selects between the PCM digital audio data applied from the MSM unit 45 and the PCM digital audio data applied from the MPEG audio playback unit 50 by the function selection signal MUX_SEL. PCM digital audio data applied from the MSM unit 45 is selected and applied to the audio codec unit 52.

The audio codec unit 52 converts PCM digital audio data applied from the digital multiplexer unit 51 into an analog voice signal using a DAC, and applies the converted analog voice signal from the MSM unit 45. The signal is applied to the signal amplifier 54 or the signal amplifier 56 according to the output selection signal EAR_MUTE *. That is, when the corresponding output selection signal is '1', the converted analog voice signal is applied to the corresponding signal amplifier 54, and when the corresponding output selection signal is '0', the converted analog voice signal is corresponding signal amplifier 56 Is applied.

Accordingly, the analog voice signal is amplified by the signal amplifier 54 or the signal amplifier 56 and output through the speaker 55 or the headphone stereo jack 57.

On the other hand, when transmitting a voice transmission signal input through the microphone 59 and the operational amplifier unit 58, the audio codec unit 52 applies the audio transmission signal amplified through the operational amplifier unit 58 A transmission reference clock which converts the corresponding amplified voice transmission signal into PCM digital audio data by using an internally configured ADC and applies the PCM digital audio data from the MSM unit 45 through the digital multiplexer unit 51. It is applied to the buffer unit 53 in synchronization with (PCM_CLK) and the synchronization signal PCM_SYNC.

Accordingly, the buffer unit 53 is a block for equalizing the data transmission delay time according to the addition of the digital multiplexer unit 51, and transmits the same PCM digital audio data applied from the audio codec unit 52. The delay is applied to the MSM unit 45.

Then, the MSM unit 45 inputs the digital signal converted through the modem block to the BBA unit 43 to be demodulated. Accordingly, the demodulated digital signal is converted into a high frequency channel by the RF / IF sub-system unit 42 and output through the antenna 41.

In the above, the input method of the PCM digital audio data input to the audio codec unit 52 uses a synchronized serial port (SSP) and consists of four signal lines. Is a transmission reference clock (PCM_CLK) that is a reference for bit transmission of the PCM digital audio data, a synchronization signal (PCM_SYNC) for distinguishing each frame information of the PCM digital audio data, and the MSM unit (45) received. The audio signal outputted through the output signal PCM_DOUT of the PCM digital audio data outputted to the audio codec unit 52 and the microphone 59 and the operational amplifier unit 58 includes the audio codec unit ( And an input signal PCM_DIN of the PCM digital audio data inputted to the MSM unit 45 via 52).

In addition, when the operation of the digital multiplexer unit 51 related to transmission control of the PCM digital audio data is described in more detail, the operation may include a function selection signal MUX_SEL using a general input / output port GPIO of the MSM unit 45. That is, when the telephone function is operated, the function selection signal MUX_SEL is set to '1' so that the PCM digital audio data applied from the MSM unit 45 passes through the audio codec unit 52. When the compressed digital audio reproduction function is to be operated, the function selection signal MUX_SEL is set to '0 (Low)', that is, the compressed digital audio reproduction function is performed. A selection signal is applied to the digital multiplexer section 51 to block PCM digital audio data applied from the MSM section 45 and from the MPEG audio playback section 50. It was passed through a PCM digital audio data that is applied to the audio codec unit 52. The

The important thing here is that the function selection signal MUX_SEL is always '1' except for the operation of the compressed digital audio playback function, so that the call can be received at any time. The MSM unit 45 converts the function selection signal MUX_SEL from the '0' state to the '1' state to enable the transmission / reception function of the telephone, that is, the operation of the telephone function rather than the operation of the compressed digital audio reproduction function. The MSM unit 45 controls the operation to be a priority.

Second, referring to the operation of the compressed digital audio reproduction function, digitally compressed MPEG audio file data is applied from the PC serial port through the universal asynchronous receive transceiver (UART) port of the peripheral unit 44 or from the telephone base station. It is downloaded to the channel and stored in flash ROM 48.

Then, the compressed digital MPEG audio file stored in the flash ROM 48 is read by the MSM unit 45 and temporarily stored in the DRAM 47, and then the MPEG audio reproduction unit through the bus interface and the controller 49. It is entered as (50). That is, the MSM unit 45 transmits the address, data, and various control signals RD *, WR *, and WAIT * through the buffer provided in the bus interface and the controller 49, and the MPEG audio playback unit 50. The chip select signal CS * is set to '0' by decoding the address used by the MPEG audio reproducing unit 50 by the address decoder provided in the corresponding bus interface and the control unit 49. It is generated and applied to the MPEG audio player 50.

Accordingly, the MPEG audio reproduction unit 50 restores the compressed digital MPEG audio file applied through the bus interface and the controller 49 to the digital multiplexer unit 51 by restoring the compressed digital MPEG audio file to the original PCM digital audio data format. . That is, the MPEG audio reproducing unit 50 recognizes its operation by receiving the chip selection signal of the '0' state from the bus interface and the control unit 49, and is applied through the bus interface and the control unit 49. Read or write addresses and data applied through the bus interface and the controller 49 according to the read control signal RD * or the write control signal WR *, and are applied through the bus interface and the controller 49 Data transmission arbitration with the MSM unit 45 is performed as a wait control signal WAIT * indicating whether the operation is ready, and the compressed digital MPEG audio file applied through the bus interface and the control unit 49 is MPEG audio. Restore to the original PCM digital audio data format by the specification, and transfer reference clock (PCM_CLK), sync signal (PCM_SYNC) and PCM digital audio data. Using the output signal (PCM_DOUT) is applied to the digital multiplexer (51).

At this time, the MSM unit 45 performs a compressed digital audio reproduction for performing a function of a compressed digital audio reproduction function in a state where the function selection signal MUX_SEL is '0 (Low)' through the general input / output port GPIO. The selection signal is applied to the digital multiplexer unit 51, and the output selection signal EAR_MUTE * is applied to the audio codec unit 52.

Then, the digital multiplexer unit 51 passes the PCM digital audio data applied from the MPEG audio reproduction unit 50 to the audio codec unit 52 according to the compressed digital audio reproduction selection signal.

The audio codec unit 52 converts PCM digital audio data applied through the digital multiplexer unit 51 into an analog voice signal using a DAC, and converts the converted analog voice signal from the MSM unit 45. The signal is applied to the signal amplifier 54 or the signal amplifier 56 according to the applied output selection signal EAR_MUTE *.

That is, when the output selection signal is '1', the converted analog voice signal is applied to the signal amplifier 54 and amplified and output through the speaker 55. When the output selection signal is '0', The converted analog voice signal is applied to the signal amplifier 56 and amplified and output through the headphone stereo jack 57.

As described above, by combining the digital audio reproduction function with the mobile telephone terminal according to the present invention, the audio codec unit, the microprocessor unit, the memory and various peripheral devices generated when the mobile telephone terminal and the digital audio player are respectively configured are duplicated. The elimination of components can reduce material cost loss and provide portability and ease of use for users who want to use both mobile phones and digital audio players.

Claims (4)

An antenna for transmitting and receiving a high frequency signal, an RF / IF sub-system unit for converting the high frequency signal into an intermediate frequency signal and converting the intermediate frequency signal into a high frequency signal, and converting the intermediate frequency signal into a digital signal and converting the digital signal into an intermediate frequency signal A BBA unit for converting a signal, a peripheral unit serving as a display, a keypad, and a power supply unit, a ROM storing a system program, a DRAM temporarily storing data generated during a system processing operation, and various kinds of information A composite mobile phone terminal device having a flash ROM for storing data and compressed digital MPEG audio files, comprising: Converts the digital signal of the BBA unit into PCM digital audio data and outputs or reads the compressed digital MPEG audio file from the flash ROM, temporarily stores and outputs the function selection signal and output selection signal in the DRAM, An MSM unit converting the PCM digital audio data to be transmitted into a digital signal and applying the digital signal to the BBA unit; A bus interface and a controller for generating a control signal and inputting / outputting the compressed digital MPEG audio file according to the control of the MSM unit; An MPEG audio reproducing unit reconstructing the compressed digital MPEG audio file into PCM digital audio data according to a control signal of the bus interface and the controller; A digital multiplexer unit for selecting one of the PCM digital audio data output from the MSM unit and the PCM digital audio data reconstructed by the MPEG audio reproduction unit according to the function selection signal of the MSM unit; Converts the PCM digital audio data selected by the digital multiplexer into an analog audio signal, selects and outputs an audio output unit according to the output selection signal of the MSM unit, and receives an analog audio signal from a microphone and converts the PCM digital audio data into PCM digital audio data. A codec section; And a buffer unit for applying the PCM digital audio data converted by the audio codec unit to the MSM unit. The method of claim 1, And the flash ROM receives the compressed digital MPEG audio file from a PC serial port through a UART port of the peripheral unit or downloads and stores an RF channel from a base station. The method of claim 1, The bus interface and the control unit includes a first buffer for storing an address applied from the MSM unit; A second buffer for storing data applied from the MSM unit; A third buffer for storing write, read and standby control signals applied from the MSM unit; And an address decoder which decodes an address applied from the MSM unit, generates a chip select signal, and applies it to the MPEG audio reproducing unit. The method of claim 1, The MPEG audio reproducing unit recognizes its operation by receiving the chip selection signal from the bus interface and the controller, and recognizes the address and data of the bus interface and the controller according to a read control signal or a write control signal applied from the bus interface and the controller. And reading out and recording, and performing data transmission arbitration with the MSM unit in accordance with the bus control signal and the standby control signal of the control unit.