KR20060082241A - Mobile apparatus capable of data communication using earphone terminal , system and a method thereof - Google Patents

Abstract

The present invention relates to a mobile device for transmitting a data signal through an earphone terminal. The mobile device according to the present invention comprises a memory for storing a data signal; An earphone terminal for transmitting a clock signal and a data signal synchronized with the clock signal through the L-channel and the R-channel; A line-in terminal for receiving a clock signal and a data signal through the L-channel and the R-channel; And when a predetermined data signal command is input, a clock signal and a data signal are transmitted through the L-channel and the R-channel of the earphone jack. And a CPU for storing the data signal in the memory. This enables direct data signal transmission between mobile devices.

Description

Mobile apparatus capable of transmitting data signals through earphone terminals, and a method thereof

1A is a schematic diagram illustrating a system for transmitting and receiving data signals between mobile devices according to the present invention.

1B is a schematic diagram of a communication cable used in communication between mobile devices according to the present invention.

Figure 2 is a block diagram of a mobile device according to an embodiment of the present invention.

3 is a flowchart illustrating the operation of a mobile device according to an embodiment of the present invention.

Figure 4 is a block diagram of a mobile device according to another embodiment of the present invention.

5 is a flowchart illustrating operation of a mobile device according to another embodiment of the present invention.

The present invention relates to a mobile device for transmitting and receiving data signals through an earphone terminal, and more particularly, in a mobile device having an earphone terminal such as an MP3 player or a digital video camera, the L-channel and R- of the earphone terminal. By using a channel as a clock signal transmission line and a data signal transmission line, the present invention relates to a technology capable of providing direct data signal transmission and reception between mobile devices without having to provide a separate communication bridge device.

In general, a mobile device refers to an electronic device of a portable type, and corresponds to an MP3 player, a digital camcorder, a PDA, and a mobile phone terminal.

Users of mobile devices demand high portability not only using main functions of mobile devices, but also functions such as setting and transmitting and receiving data signals between mobile devices.

However, there is a problem that it is difficult to provide portability since data signal transmission and reception between conventional mobile devices must include a separate communication bridge device (PC, cradle device, etc.).

Conventionally, there is a communication method between mobile devices using infrared communication in order to overcome this problem, but in order to use this communication method, the production cost increases because a separate infrared module must be installed in each mobile device. have.

The present invention has been made to solve the above problems, by transmitting and receiving clock signals and data signals with other mobile devices through the L-channel output terminal and the R-channel output terminal of the earphone terminal provided in the mobile device, production costs It is an object of the present invention to provide a mobile device and a method for transmitting a data signal through an earphone terminal that can reduce the cost and increase portability.

The mobile device for transmitting data through the earphone terminal according to the present invention for solving the above problems is a memory for storing a data signal; An earphone terminal for transmitting a clock signal and the data signal synchronized with the clock signal through an L-channel and an R-channel; A line-in terminal configured to receive the clock signal and the data signal through the L-channel and the R-channel; And when the predetermined data transmission command is input, the clock signal and the data signal are transmitted through the L-channel and the R-channel of the earphone terminal. When the predetermined data reception command is input, the L-channel and And a CPU for storing the data signal input through the R-channel in the memory.

In this case, preferably, the D / A converter converts the data signal stored in the memory into an analog signal and outputs the analog signal to the earphone terminal; And an A / D converter converting the data signal received through the line-in terminal into a digital signal.

And preferably, communication between the CPU, the D / A converter and the A / D converter is via I2C.

And preferably, a D / A converter for converting a data signal stored in a memory into an analog signal and outputting the analog signal to the earphone terminal; A first switch for selecting an output of the D / A converter in an earphone mode for outputting sound and selecting and outputting the data signal in a digital format output from a CPU when the data transmission command is input; An A / D converter converting a data signal received through a line-in terminal into a digital signal; And a second switch for selecting an output of the A / D converter in a line-in mode in which a sound signal is input during line-input, and selecting an input signal as it is when the data receiving command is input.

Preferably, the CPU inputs and outputs the clock signal and the data signal through GPI / O, and the input and output of the clock signal and the data signal through the earphone terminal and the line-in terminal are performed by an I2C method.

And preferably, an operation unit having a key for inputting the data transmission command and the data reception command.

On the other hand, the mobile period data transmission method through the earphone terminal according to the present invention, in response to a predetermined data transmission command, the clock signal and the data signal synchronized to the clock signal through the L-channel and the R-channel of the earphone terminal. Transmitting a first step; And a second step of receiving the clock signal and the data signal through the L-channel and the R-channel of a line-in terminal in response to a predetermined data receiving command.

In this case, preferably, the first step includes converting the data signal into an analog signal and outputting the analog signal to the earphone terminal, and the second step includes converting the data signal received through the line-in terminal into a digital signal. Analog to digital conversion step of converting.

Preferably, the first step may digitally transmit the clock signal and the data signal according to I2C communication, and the second step may receive the digital clock signal and the data signal through I2C communication.

Preferably, the input and output of the clock signal and the data signal are made through GPI / O, and the input and output of the clock signal and the data signal through the earphone terminal and the line-in terminal are made by I 2 C method.

On the other hand, the communication system between mobile devices through the earphone terminal according to another embodiment of the present invention, a first mobile device for outputting a clock signal and a data signal synchronized with the clock signal through the earphone terminal; A second mobile device which receives the output clock signal and the data signal through a line-in terminal; And a communication line connecting the earphone terminal of the first mobile device and the line-in terminal of the second mobile device to transmit the data signal and the clock signal.

In this case, preferably, the first mobile device receives the clock signal and the data signal synchronized with the clock signal through I2C (Inter-Integrated Circuit) communication, converts the analog signal, and outputs the analog signal to the earphone terminal. and a digital / analog conversion unit, wherein the second mobile device digitally converts the clock signal inputted through the line-in terminal and a data signal synchronized with the clock signal, and then converts the clock signal to the CPU according to an I2C scheme. An output A / D (analog / digital) converter is included.

According to another aspect of the present invention, a method of communication between mobile devices through an earphone terminal includes: a first step of outputting a clock signal and a data signal synchronized with the clock signal through an earphone terminal of an eleventh mobile device; And a second step of receiving the outputted clock signal and the data signal through any one of a line-in terminal or an earphone terminal of the second mobile device.

In this case, preferably, the first step includes receiving the clock signal and a data signal synchronized with the clock signal through I2C communication, converting the analog signal, and outputting the analog signal to the earphone terminal. And digitally converting the clock signal input through the line-in terminal and a data signal synchronized with the clock signal, and outputting the digital signal to the CPU according to an I 2 C scheme.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1A is a schematic diagram illustrating a system for transmitting and receiving data signals between mobile devices according to the present invention. Referring to FIG. 1A, the first mobile device 10 and the second mobile device 20 transmit and receive data signals through a communication cable. At this time, the first mobile device 10 transmitting the data signal transmits the clock signal and the data signal through the L-channel and the R-channel of the earphone terminal 15. In addition, the second mobile device 20 receives a clock signal and a data signal transmitted through the L-channel and the R-channel through either the line-in terminal or the earphone terminal, and stores the received clock signal in a predetermined memory space.

1B is a schematic diagram of a communication cable used in communication between mobile devices according to the present invention. The communication cable is a conventional communication cable for earphone output. It is composed of three lines of L-channel line, R-channel line, and ground line, and the jacks at both ends connect L-channel, R-channel, and ground signal. It is configured to be input independently. The present invention uses the L-channel and the R-channel of three communication lines configured in the communication cable for earphones to transmit and receive clock signals and data signals, respectively, thereby transmitting and receiving data signals in synchronization with the clock signals.

2 is a block diagram of a mobile device for transmitting a data signal through the earphone terminal according to an embodiment of the present invention. Referring to FIG. 2, a mobile device for transmitting a data signal through the earphone terminal 130 may include a memory 110, a D / A converter 120, an L-channel output terminal 131, and an R-channel output terminal 136. A line-in terminal 140 including an earphone terminal 130, an L-channel input terminal 141, and an R-channel input terminal 146, an operation unit 160, an A / D conversion unit 150, And a CPU 170.

The memory 110 may be variously configured as a flash type, a hard disk type, or the like, and stores a data signal to be transmitted and a received data signal.

The D / A converter 120 converts an input digital signal into an analog signal and outputs the analog signal. At this time, the analog-converted signal is a data signal synchronized with a predetermined clock signal and a clock signal.

The earphone terminal 130 has an L-channel output terminal 131 and an R-channel output terminal 132, and a signal input through the L-channel and the R-channel, that is, a clock signal and a data signal through a communication cable connected thereto. Send to the outside.

Meanwhile, the line-in terminal 140 receives a clock signal and a data signal input from a communication cable connected to the line-in terminal 140 through the L-channel input terminal 141 and the R-channel input terminal 143, respectively. do.                     

The A / D converter 150 digitally converts and outputs a signal input from the line-in terminal 140.

The operation unit 160 includes a display unit (not shown) configured as an LCD or the like to display the state of the mobile device, and a key input unit (not shown) for inputting various commands. And a key for inputting a data transmission command for transmitting a data reception command for receiving a data signal from an external mobile device.

When a data transmission command is input from the operation unit 160, the CPU 170 reads out a data signal from the memory 110, generates a clock signal to be synchronized with the read data signal, and then executes D / C through I2C communication. Transmit to A converter 120. The D / A-converted clock signal and the data signal synchronized with the clock signal are output through the L-channel output terminal 131 and the R-channel output terminal 136 of the earphone terminal 130 through a communication cable.

In addition, when a data reception command is input from the operation unit 160, the CPU 170 may clock from an external mobile device through the L-channel input terminal 141 and the R-channel input terminal 146 of the line-in terminal 140. A data signal synchronized with a signal and a clock signal is received, and the A / D converter 150 is controlled to convert the received data signal into a digital signal. Then, the digitally converted clock signal and data signal are received through I2C communication and stored in the memory 110 using a predetermined memory recording protocol.

3 is a flowchart illustrating an operation of a mobile device according to an embodiment of the present invention. 2 and 3, the CPU 170 first checks whether a data reception command or a data transmission command is input from the operation unit 160 (S200). If the data transmission command is received, the data signal to be transmitted is read from the memory 110, and a clock signal for synchronizing the data signal is generated (210). The generated clock signal and the data signal are transmitted to the D / A converter 120 through I2C communication and converted into analog signals, which are then converted into L-channel output terminal 131 and R-channel output terminal 136 of the earphone terminal 130. Transmit to an external mobile device through (S230).

On the other hand, when it is determined in step S200 that the data reception command is input, the CPU 170 is a clock signal and the clock through the L-channel input terminal 131 and the R-channel input terminal 136 of the line-in terminal 130. The data signal synchronized with the signal is received and provided to the A / D converter 120 to convert the clock signal and the data signal synchronized with the signal into a digital signal (S250). The converted clock signal and the data signal are transferred to the CPU 170 through the I2C communication, and the CPU 170 writes them to the memory (S260).

Meanwhile, the mobile device for transmitting the data signal through the earphone output according to another embodiment of the present invention may be configured to directly transmit and receive digital data signals without D / A conversion and A / D conversion. This configuration is to prevent data signal loss due to D / A conversion and A / D conversion, and is configured to directly transmit and receive digital data signals using GPI / O and I2C communication. Program codes or images that require signals can be transmitted without error.

4 is a block diagram of a mobile device according to another embodiment of the present invention. Referring to the drawings, a mobile device according to the present invention includes a memory 510, a D / A converter 520, a first switch 525, an L-channel output terminal 531, and an R-channel output terminal 536. A line-in terminal 540 including an earphone terminal 530, an L-channel input terminal 541, and an R-channel input terminal 546, an A / D converter 550, a second switch 555, and an operation unit. 560, and a CPU 570.

The memory 510, the D / A converter 520, the earphone terminal 530, the line-in terminal 540, and the A / D converter 550 may be configured as shown in FIG. 2. The description will be omitted.

Meanwhile, the first switch 525 selects one of a signal input from the D / A converter 520 or a signal input through the GPI / O of the CPU 570 and outputs it to the earphone terminal 530. The second switch 555 outputs a signal input through the line-in terminal 540 to either the A / D converter 550 or the GPI / O of the CPU 570. Perform.

When a general sound reproduction command is input through the operation unit 560, the CPU 570 may include a first switch 525 to externally output the sound signal input from the D / A converter 520 through the earphone terminal 530. ), And when a data transmission command is input, the clock signal and the data signal output through the GPI / O of the CPU 570 are transferred to the L-channel output terminal 531 and the R-channel output terminal () of the earphone terminal 530. 536) to control the output.

Similarly, the CPU 570 is input from the L-channel input terminal 541 and the R-channel input terminal 546 of the line-in terminal 540 when a general line-in command is input through the operation unit 560. The second switch 555 is controlled to output the sound signal to the A / D converter 550, and when a data reception command is input, the L-channel input terminal 541 of the line-in terminal 540, and R The second switch 555 is controlled to input the clock signal and the data signal input from the channel input terminal 546 to the GPI / O of the CPU 570.

At this time, the CPU 570 performs data input / output through the earphone terminal 530 and the line-in terminal 540 in accordance with I2C communication.

On the other hand, in the configuration for performing mobile period data communication through the I2C communication method as shown in Figure 4, the terminal for receiving data may be configured as not only the line-in terminal 540 but also the earphone terminal 530. .

5 is a flowchart illustrating an operation of a mobile device according to another embodiment of the present invention. 4 and 5, the CPU 570 first checks whether the data receiving command or the data transmitting command is input by the operation unit 560 (S600).

If it is determined in step S600 that a data transmission command is input, a predetermined data signal is read from the memory 510 (S610) and output to a switch through a predetermined GPI / O (S620). At this time, the clock signal is output through GPI / O_0 and the data signal is output through GPI / O_1.

The first switch 525 outputs the clock signal and the data signal input through the GPI / O to the earphone terminal 530 (S630), and the input clock signal and the data signal connect the communication line connected to the earphone terminal 530. It is transmitted to the external mobile device through (S640). At this time, the data signal transmission and reception with the external mobile device is made through the I2C interface.

On the other hand, when it is determined in step S600 that the data transmission command is input, the clock signal and the data signal are transmitted through the L-channel input terminal 541 and the R-channel input terminal 546 of the line-in terminal 540 through the I2C interface. It receives an input (S650). In operation S660, the second switch 555 is controlled to transmit the input clock signal and the data signal to the CPU 570. The CPU 570 receives the clock signal and the data signal through the GPI / O (S670), buffers them, and writes them to the memory 510 by the memory write protocol (S680).

By the method as described above, it is possible to transmit and receive mobile period data signal without having a separate communication bridge device.

Therefore, according to the present invention, by using each of the R-channel and L-channel of the earphone terminal as a data signal line and a clock signal line, since the direct communication between the mobile devices can be performed without a separate bridge device, portability of the mobile device The advantage is that it can be increased even higher. In addition, there is no need to provide a separate bridge device, there is an advantage that can reduce the production cost of the mobile device set.

In addition, a preferred embodiment of the present invention is for the purpose of illustration, those skilled in the art will be able to various modifications, changes, substitutions and additions through the spirit and scope of the appended claims, such modifications and changes are the following claims It should be seen as belonging to a range.

Claims (17)

A memory for storing a data signal; An earphone terminal for transmitting a clock signal and the data signal synchronized with the clock signal through an L-channel and an R-channel; A line-in terminal configured to receive the clock signal and the data signal through the L-channel and the R-channel; and When a predetermined data transmission command is input, the clock signal and the data signal are transmitted through the L-channel and the R-channel of the earphone terminal. When a predetermined data reception command is input, the L-channel and the And a CPU for storing the data signal input through the R-channel in the memory. The method of claim 1, A D / A converter converting the data signal stored in the memory into an analog signal and outputting the analog signal to the earphone terminal; And And an A / D converter for converting the data signal received through the line-in terminal into a digital signal. The method of claim 2, And the communication between the CPU, the D / A converter, and the A / D converter is performed via I2C. The method of claim 1, A D / A converter converting a data signal stored in a memory into an analog signal and outputting the analog signal to the earphone terminal; A first switch for selecting an output of the D / A converter in an earphone mode for outputting sound and selecting and outputting the data signal in a digital format output from a CPU when the data transmission command is input; An A / D converter converting a data signal received through a line-in terminal into a digital signal; And And a second switch for selecting an output of the A / D converter when the line-in mode receives an audio signal during line-input, and selecting the input signal as it is when the data receiving command is input. Mobile device that transmits data through the earphone jack. The method of claim 4, wherein The CPU inputs and outputs the clock signal and the data signal through GPI / O, and the input and output of the clock signal and the data signal through the earphone terminal and the line-in terminal are performed by an I2C method. A mobile device that transmits data over the internet. The method of claim 1, And a control unit having a key for inputting the data transmission command and the data reception command. A first step of transmitting a clock signal and the data signal synchronized with the clock signal through an L-channel and an R-channel of an earphone terminal in response to a predetermined data transmission command; And And a second step of receiving the clock signal and the data signal through the L-channel and the R-channel of a line-in terminal in response to a predetermined data receiving command. Transmission method. The method of claim 7, wherein The first step may include converting the data signal into an analog signal and outputting the analog signal to the earphone terminal. The second step may include an analog-to-digital conversion step of converting a data signal received through the line-in terminal into a digital signal. The method of claim 7, wherein In the first step, the clock signal and the data signal are digitally transmitted in accordance with I2C communication. The second step, the mobile period data transmission method through the earphone terminal, characterized in that for receiving the clock signal and the data signal in digital form through I2C communication. The method of claim 9, The input and output of the clock signal and the data signal are made through GPI / O, and the input and output of the clock signal and the data signal through the earphone terminal and the line-in terminal are made through an I2C method. Mobile period data transmission method. A first mobile device for outputting a clock signal and a data signal synchronized with the clock signal through an earphone terminal; A second mobile device which receives the output clock signal and the data signal through a line-in terminal; And And a communication line connecting the earphone terminal of the first mobile device and the line-in terminal of the second mobile device to transmit the data signal and the clock signal. The method of claim 11, The first mobile device receives the clock signal and the data signal synchronized with the clock signal through I2C (Inter-Integrated Circuit) communication, converts the analog signal, and outputs the analog signal to the earphone terminal (D / A). Including a conversion unit, The second mobile device digitally converts the clock signal inputted through the line-in terminal and the data signal synchronized with the clock signal, and then outputs to the CPU according to an I2C method (analog / digital). Communication system between mobile devices using the earphone terminal, characterized in that it comprises a conversion unit. The method of claim 11, The first mobile device outputs the clock signal in digital format and the data signal synchronized with the clock signal through a general purpose input / output (GPI / O), The second mobile device receives the clock signal in digital format and the data signal synchronized with the clock signal through a GPI / O. And the first mobile device and the second mobile device input and output data through I2C communication. The method of claim 11, wherein the communication line, A communication system between mobile devices using an earphone terminal, characterized in that the L-channel, R-channel, and ground to the line. Outputting a clock signal and a data signal synchronized with the clock signal through the earphone terminal of the eleventh mobile device; And And a second step of receiving the outputted clock signal and the data signal through any one of a line-in terminal or an earphone terminal of a second mobile device. The method of claim 15, The first step includes receiving the clock signal and a data signal synchronized with the clock signal through I2C communication, converting the analog signal, and outputting the analog signal to the earphone terminal. The second step may include digitally converting the clock signal inputted through the line-in terminal and a data signal synchronized with the clock signal, and outputting the digital signal to the CPU according to an I2C scheme. Communication method between mobile devices using earphone terminal. The method of claim 15, The first step may include outputting the clock signal and the data signal synchronized with the clock signal in a digital format through GPI / O, In the second step, the digital signal receives the clock signal and the data signal synchronized with the clock signal through a GPI / O. And the first mobile device and the second mobile device input and output data through I2C communication.

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