KR20030056986A - Hands Free System of Mobile Phone Using MP3 Player - Google Patents

Abstract

PURPOSE: A hands-free system of a mobile phone using an MP3(MPEG(Moving Picture Experts Group) layer 3) player is provided to connect the mobile phone with the MP3 player, so as to automatically stop playback of the MP3 player if the mobile phone is paged while the MP3 player is used and to enable a phone call. CONSTITUTION: An MP3 player(10) includes a hands-free module providing a function to detect inputted ring signals to stop playing an MP3 file and input/output voice signals for a phone call, and includes an USB(Universal Serial Bus) port. An interface cable(60) connects a mobile phone(30) with the MP3 player(10), to deliver an inputs/outputs of the voice signals, the ring signals, and hook signals. An ear-microphone set(40) connected to an output part of the MP3 player(10) outputs audio signals of the MP3 player(10) and the mobile phone(30) and inputs voice. The interface cable(60) comprises two lines and a ring signal processor. The two lines respectively connect microphone input and output terminals, and audio output and input terminals of an output part of the mobile phone(30) and the hands-free module of the MP3 player(10). And the ring signal processor connected to a ground terminal of the mobile phone(30) and a ring signal input terminal of the hands-free module detects and delivers the ring signals and provides a ground potential.

Description

Hands Free System of Mobile Phone Using MP3 Player

The present invention relates to a hands-free system of a mobile phone using an MP3 player, and more particularly, to a hands-free system using an MP3 player having a hands-free function connected to the mobile phone.

In general, in order to use the mobile phone as a hands-free function due to driving a vehicle or other things, it is necessary to connect the hands-free to the earphone jack of the mobile phone.

The hands-free has a different function and form of hands-free according to the situation of use.

For example, use a mobile phone, hands-free with a simple hook switch and an earphone / microphone set that connects only earphones and a microphone while walking, and a built-in circuit such as a microphone and a voice amplifier when driving a vehicle. Use hands free.

In particular, the vehicle hands-free is also showing a variety of car audio functions, such as radio and cassette tape player.

On the other hand, MP3 type audio files (hereinafter referred to as MP3 files) are the most commonly used types of digital audio data types because the size of the data is very small compared to the output sound quality.

In addition, portable MP3 players capable of storing and reproducing the above MP3 files have been widely used.

However, when a mobile phone is called while carrying an MP3 player, there is an inconvenience of having to make a phone call after disconnecting the earphone used to listen to the output of the MP3 player.

Accordingly, the present invention has been made in view of the problems of the prior art, and its object is to automatically stop playback of the MP3 player and make a phone call when the mobile phone is called while using the MP3 player by connecting the mobile phone and the MP3 player to each other. To provide a hands-free system of a mobile phone using an MP3 player that enables the.

1 is a block diagram illustrating a hands-free system of a mobile telephone using an MP3 player according to the present invention.

Figure 2 is a block diagram for explaining an interface cable in the present invention.

3 is a circuit diagram illustrating an interface cable in the present invention.

Figure 4 is a block diagram for explaining an MP3 player in the present invention.

Explanation of symbols on the main parts of the drawings

10: MP3 player 25: PC

30: mobile phone 40: ear / microphone set

50: USB cable

In order to achieve the above object, the present invention is provided with a hands-free module having a function of detecting input ring signals to stop playing MP3 files and input and output voice signals for phone calls, and an MP3 player having a USB port. Wow; An interface cable connecting the MP3 player and the mobile telephone to transfer an input / output of a voice signal, a ring signal, and a hook signal; It is connected to the output terminal of the MP3 player provides a hands-free system for a mobile phone using an MP3 player, characterized in that it comprises an ear / microphone set for audio output and voice input of the mobile phone.

The interface cable includes two lines connecting the mobile phone output terminal and the microphone input terminal and the output terminal, the audio output terminal and the input terminal of the hands-free module of the MP3 player, respectively; It is connected to the ground terminal of the mobile telephone and the ring signal input terminal of the hands-free module of the MP3 player, and comprises a ring signal processing unit for detecting and transmitting a ring signal and providing a ground potential.

The ring signal processing line includes a band filter for receiving a ring signal output from the ground terminal of the mobile phone and passing only a frequency of a ring signal band, a detector for detecting a ring signal among signals transmitted through the band filter; And a comparator for recognizing and outputting only a signal of a predetermined level or more among the signals output from the detector as a ring signal, and a power processor for supplying driving power to the detector and the comparator, and providing a ground terminal. .

As described above, in the present invention, when the mobile phone and the MP3 player are connected to each other and the incoming call is made to the mobile phone while using the MP3 player, the call is automatically switched and the playback of the MP3 player is stopped and the phone call is enabled.

(Example)

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention described above in more detail.

1 is a block diagram illustrating a hands-free system of a mobile telephone using an MP3 player according to the present invention, FIG. 2 is a block diagram illustrating an interface cable according to the present invention, and FIG. 3 is an interface cable according to the present invention. 4 is a block diagram illustrating an MP3 player in the present invention.

Hands-free system of a mobile phone using an MP3 player according to the present invention

As shown in FIG. 1, an ear / microphone set 40 for audio input / output is connected to a DAC 15, which is an input / output terminal of the MP3 player 10, centering on the MP3 player 10. In order to store the MP3 file data in the memory 12, the USB port of the PC 25 and the USB port 11 of the MP3 player are connected with the USB cable 50.

In addition, in order to connect the MP3 player 10 and the mobile phone 30, an input / output terminal of the hands-free module 16 of the MP3 player 10 and the input / output terminal of the mobile phone are configured as shown in FIG. 60).

As shown in FIGS. 2 and 3, the interface cable 60 includes a ground terminal (GND, 67a), an audio output terminal (EAR, 67b), and an audio input terminal (MIC) connected to an input / output terminal of the mobile phone 30. The audio output terminal 67b and the audio input terminal 67c are connected to the audio input terminal 68c and the audio output terminal 68d of the MP3 player, respectively.

When the incoming call is made to the ground terminal 67a of the mobile phone 30, the incoming signal RING is applied and output. Therefore, in order to separate the incoming signal, resistors R ₁ , capacitors C _{1 to} C ₄ , A band pass filter 62 composed of coils L _{1 to} L ₆ ; A detection unit 64 composed of an OP amplifier OP ₁ , resistors R ₂ to R ₁₁ , capacitors C _{5 to} C ₈ , diodes D _{1 to} D ₄ , and the like; A comparator 66 composed of an OP amplifier OP ₂ and resistors R ₁₂ to R ₁₄ ; In order to supply the operating power Vdd of the detector 64 and the comparator 66 and to separate the incoming signal RING and the ground signal, the driving power Vcc is applied to the operating power Vdd and the ground terminal. It consists of a power supply processing section 61 consisting of capacitors C ₉ and C ₁₀ and coil L ₇ separating GND).

For reference, as illustrated in FIG. 4, the MP3 player 10 connected to the mobile phone 30 includes a control unit 20, a USB port 11, a memory 12, an LCD 13, a keypad 14, The DAC 15, the hands free module 16, the battery 18, the battery monitor 18, the DC-DC converter 19, and the like, and the ear / microphone set 40 is connected to the DAC 15. The interface cable 60 is connected to the hands free module 16.

In the connected state, the user operates the MP3 player 10 so that the MP3 file can be played and listened to in the audio play state. When the hands-free module 16 of the MP3 player 10 is operated, the audio playback is stopped. And hands-free mode is entered.

In other words, an MP3 file is played through the MP3 player 10 to listen to audio, and then the incoming call is received by the mobile phone 30 so that the incoming signal is received through the ground terminal 67a of the mobile phone 30. When the signal is output, the incoming signal RING and the ground terminal are separated through the band filter 62, the detector 64, and the comparator 66, and the incoming signal RING is input to the hands free module 16. In 16), when the incoming signal RING is input, it is input to the control unit 20.

When the incoming signal RING is input, the control unit 20 outputs the incoming signal through the ear / microphone set 40 to notify the incoming call, and the user sends a send or end to the mobile phone 30. When a call is initiated by pressing a key or the like, audio reproduction of the MP3 file is stopped, and an audio signal of the mobile phone 30 input / output through the hands-free module 16 is input / output to the ear / microphone set 40. Enable the call.

When the other party ends the phone call first or the user ends the phone call by pressing the END key, the MP3 file being played is subsequently played and output.

The present invention made as described above is connected to the mobile phone and the MP3 player while using the MP3 player when the incoming call to the mobile phone is automatically switched to the call while the playback of the MP3 player and the ability to make a phone call To provide.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and the general knowledge in the technical field to which the present invention pertains without departing from the spirit of the present invention. Various changes and modifications will be made by those who possess.

Claims (3)

An MP3 player having a hands-free module having a function of detecting an input ring signal to stop playing an MP3 file and inputting and outputting a voice signal for a telephone call; An interface cable connecting the MP3 player and the mobile telephone to transfer an input / output of a voice signal, a ring signal, and a hook signal; And an ear / microphone set connected to an output terminal of the MP3 player, and including an audio signal of the MP3 player and an ear / microphone set for audio output and voice input of the mobile phone. 2. The apparatus of claim 1, wherein the interface cable comprises: two lines connecting a microphone input terminal and an output terminal, an audio output terminal and an input terminal of each of the mobile phone output terminal and the hands-free module of the MP3 player; The mobile terminal is connected to the ground terminal of the mobile phone and the ring signal input terminal of the hands-free module of the MP3 player, and includes a ring signal processing unit for detecting and transmitting a ring signal and providing a ground potential. Hands free system of the phone. 3. The ring signal processor of claim 2, wherein the ring signal processor receives a ring signal output from the ground terminal of the mobile telephone and passes only a frequency of a ring signal band, and a ring signal among signals transmitted through the band filter. A detector for detecting, a comparator for recognizing and outputting only a signal of a predetermined level or more among the signals output from the detector, and a power processor for supplying a driving power and a ground terminal by receiving driving power; Hands-free system of a mobile phone using MP3 player, characterized in that configured to include.