TWI408599B - Signal processing apparatus and method thereof - Google Patents

Abstract

The present invention discloses a signal processing apparatus and method thereof. The signal processing apparatus is connected between a Smartphone and a computer. It receives a first data signal and?a analog audio signal from the Smartphone, and transforms into the second data signal to the computer. Based on the second data signal, the computer plays a corresponding sound or processes the first data signal. Also, the computer sends operation commands to the Smartphone via the signal processing apparatus so the Smartphone can conduct corresponding processing actions.

Description

Signal processing device and method thereof

The present invention relates to a signal processing apparatus and method thereof, and more particularly to a signal processing apparatus and method thereof for connecting between a smart mobile phone and a computer.

According to the portable audio source playback device such as a smart mobile phone, an MP3 player, an MP4 player, etc., in order to transmit data and play music, a headphone jack and a data connector are usually provided thereon, and through the earphone socket and The data connector outputs an analog audio signal and a digital data signal respectively.

Even the related industry has designed an external audio player corresponding to the portable audio source playback device, and the portable audio source playback device can be plugged into the corresponding earphone plug of the external audio player via the earphone socket and the data connector respectively. On the data connector. The external sound player can play the sound source signal of the portable audio source playing device, receive the digital data signal from the portable audio source playing device, or transmit the digital data signal to the portable audio source playing device. However, such an external sound player is bulky and is not suitable for carrying out.

Moreover, taking a general smart mobile phone as an example, a headphone jack and a USB connector are respectively disposed around the casing of the smart mobile phone. When a smart mobile phone needs to be connected to a computer, it must occupy a microphone socket and a USB connector of the computer. The analog audio signal outputted by the headphone jack of the smart mobile phone is received by the computer's microphone socket, processed by the computer's audio processing unit (usually a sound card or a sound processing chip), and then output by the speaker connected to the computer. sound.

However, if the user needs to plug the earphone socket of other electronic device into the microphone socket of the computer, the user will need to remove the earphone socket of the smart mobile phone from the microphone socket of the computer, and then the earphone socket of the other electronic device. Plugged into the microphone socket of the computer, so that the repeated insertion and removal process will cause users to use it.

In addition, when a smart mobile phone is connected to a computer, the operating system of the computer usually displays the storage unit (such as a flash memory) inside the smart mobile phone in the operating system of the computer in the form of a storage device. In the application software of the "File Manager", if you want to play the audio electronic file stored in the smart mobile phone, the user clicks to select the audio electronic file to be played, and then activates the sound playback software (eg Windows Media Player). After processing, it is processed by the sound processing unit of the computer, and finally, the sound is played through the speaker connected to the computer.

However, the voice electronic file of the smart mobile phone must be able to play the sound through the computer's speaker through multiple application software. This operation is complicated, complicated, and inconvenient for the user.

Moreover, the user cannot issue an operation command to the smart mobile phone via the computer, and requires the smart mobile phone to perform corresponding processing, for example, issuing a command from the computer to request the smart mobile phone to play the next or next voice electronic file, and suspending. Play sound electronic files...etc. Therefore, it is necessary to improve on the above issues.

In view of the above problems of the prior art, the object of the present invention is to provide a signal processing device and a method thereof, which solve the problem of connection between the traditional portable audio source playback device and the electronic device, and the external audio player is not portable. The problem.

According to the purpose of the present invention, a signal processing apparatus is provided, which comprises a first connection end, a sound input end, a code decoding unit, a hub and a second connection end. The first connection terminal provides a connection to a smart mobile phone and receives the first data signal output by the smart mobile phone. The sound input terminal provides a connection to a smart mobile phone and receives an analog sound signal output by the smart mobile phone. The code decoding unit is connected to the sound input end, and receives the analog sound signal and generates a corresponding digital sound signal. The hub receives the digital audio signal output by the coding and decoding unit, and receives the first data signal output by the first connection end, and generates a corresponding second data signal according to the digital audio signal and the first data signal. The second connection is connected to the hub and is connected to a computer for receiving the second data signal and transmitting the second data signal to the computer. In this way, the signal processing device is connected between the smart mobile phone and the computer, so that the first data signal and the analog audio signal output by the smart mobile phone are converted by the signal processing device and transmitted to the computer through the signal processing device. .

The signal processing device further includes a UI control unit, and the control unit is connected to the code decoding unit, the sound input terminal and the hub. When the control unit has not received the analog sound signal from the sound input end, the control unit causes the code decoding unit to enter a power saving mode, and when the control unit receives the analog sound signal via the sound input end, the control unit starts the The code decoding unit receives the analog sound signal and generates a digital sound signal according to the analog sound signal.

The second connection end receives the power provided by the computer, and the power is sequentially transmitted to the smart mobile phone via the hub and the first connection end to charge the smart mobile phone.

The button further includes a button, the button is connected to the control unit, and the button selection control unit is switched between the forced charging mode and the normal charging mode, for forcibly charging the smart mobile phone, or the power supply of the smart mobile phone. The smart mobile phone is charged when it is below a predetermined value.

The power identification unit is connected to the control unit, and receives the power output by the computer to identify whether the power output by the computer meets the charging that the smart mobile phone can receive. Specifications, when the power of the computer meets the charging specifications of the smart mobile phone, the smart mobile phone can be charged, otherwise the smart mobile phone will be suspended.

The first display unit is connected to the control unit, and the control unit generates a first display signal and transmits the first display signal to the first display unit, so that the first display unit indicates whether the first connection end and the sound input end are Send the first data signal or analog audio signal.

There is further included a second display unit, the second display unit is connected to the control unit, and the second display unit display control unit is switched to the forced charging mode or the general charging mode.

In accordance with the purpose of the present invention, a signal processing method is provided for use between a smart mobile phone and a computer, which includes the following steps. Outputting a first data signal or an analog sound signal, wherein the first data signal is outputted by a data output/input terminal provided by the smart mobile phone, and the analog sound signal is output by the sound output terminal of the smart mobile phone Receiving, by the first connection end of the signal processing device, the first data signal outputted by the data output/input terminal, and the audio input end provided by the signal processing device receives the analog audio signal output by the sound output terminal; The code decoding unit provided by the signal processing device receives the analog sound signal and converts the analog sound signal into a corresponding digital sound signal; and receives the digital sound signal output by the code decoding unit by using a hub provided by the signal processing device, and receives a first data signal outputted by the first connection end, and a second data signal corresponding to the digital audio signal and the first data signal; and the second data signal received by the signal processing device receives the second data signal, and the first Two data signals are transmitted to the computer; the second data signal is received by the computer and is based on the second data signal Respective processing line, for playing the sound corresponding to the analog audio signal, and a first operation processing corresponding to the data signal.

As described above, the signal connection processing apparatus according to the present invention may have one or more of the following advantages:
(1) The signal processing device is easy to carry and is easy to connect between the smart mobile phone and the computer, and is convenient for playing the analog audio signal of the smart mobile phone from the computer.
(2) The signal processing device is connected between the smart mobile phone and the computer, so that the computer can control the smart mobile phone through the third data signal.

Please refer to FIGS. 1 and 2, which are circuit block diagrams of the signal processing apparatus of the present invention and a schematic diagram of the use state of the signal processing apparatus of the present invention. The figure includes a first connection end 10, a second connection end 12, an audio input terminal 20, a code decoding unit 30 and a hub 40. The first connection end 10 provides a data output/input terminal connected to a smart mobile phone 2, and receives the first data signal outputted by the data output/input terminal. The sound input terminal 20 provides a sound output terminal connected to the smart phone 2 and receives an analog sound signal output from the sound output terminal. The code decoding unit 30 is connected to the sound input terminal 20, and receives the analog sound signal, and generates a corresponding digital sound signal according to the analog sound signal. The hub 40 is connected to the code decoding unit 30, and receives the digital audio signal output by the code decoding unit 30, and receives the first data signal output by the first connection terminal 10, and generates the corresponding digital audio signal and the first data signal. Two data signals. The second connection terminal 12 is connected to the hub 40 for receiving the second data signal and is connected to a computer 3 for transmitting the second data signal to the computer.

In the present invention, the computer 3 further includes an operation module, which can be installed in a working system of the computer for a resident program, or a firmware stored in a processing chip, and the operation module receives The input signal input by the input device 32 (such as a keyboard, a mouse or a touch panel, etc.) connected to the computer 3 causes the operation module to generate a corresponding control command according to the input signal, and sequentially passes through the second connection end. 12. The hub 40 and the first connection terminal 10 transmit control commands to the data output/input terminal, so that the smart mobile phone 2 performs corresponding processing according to the manipulation command.

In an embodiment of the present invention, the manipulation command is to select one of the sound electronic files pre-stored in the smart mobile phone 2, so that the smart mobile phone 2 processes the sound electronic file into an analog sound signal and outputs the sound signal to the sound input terminal. 20, or choose to play a sound electronic file or the next sound electronic file on the sound electronic file that is currently playing, or pause the sound electronic file that is already playing, or terminate the sound electronic file that is already playing, or Turn off/on the power of the smart phone, or force the smart phone...etc. In other words, the corresponding control of the functions set by the computer 3 for the smart mobile phone 2 is a control command referred to in the present invention.

According to the above, between the smart mobile phone and the computer, the signal processing device is connected to each other, so that the first data signal and the analog audio signal output by the smart mobile phone are converted by the signal processing device and simultaneously passed through the signal. Transferring the processing device to the computer will reduce the use of the sound input to the computer.

Referring to FIG. 1, the signal processing device further includes a UI control unit 50. The control unit 50 is connected to the code decoding unit 30, the sound input terminal 20, and the hub 40. When the control unit 50 has not received the analog audio signal from the sound input terminal 20, the control unit 50 issues a power saving command to the code decoding unit 30, so that the code decoding unit 30 enters a power saving mode, and when the control unit 50 When the analog audio signal is received through the voice input terminal 20, the control unit 50 sends a start command to the code decoding unit 30, and the control unit 50 activates the code decoding unit 30, and the code decoding unit 30 enters a startup mode and receives An analog sound signal, and a digital sound signal is generated according to an analog sound signal.

Referring to Figures 1 and 2, the second connection terminal 12 receives the power provided by the computer 3, and the power is sequentially transmitted to the smart mobile phone 2 via the hub 40 and the first connection terminal 10 for wisdom. The type of mobile phone 2 is charged. Furthermore, the present invention includes a power recognition unit 60, and the power recognition unit 60 is connected to the 50 control unit, and receives power output from the computer 3 for identifying the power output of the computer 3, whether it conforms to the smart mobile phone 2 The charging specification can be received. When the power of the computer 3 meets the charging specification of the smart mobile phone 2, the control unit turns on the charging circuit between the first connecting end and the hub to charge the smart mobile phone 1. Otherwise, when the power output from the computer 3 does not meet the charging standard of the smart mobile phone 2, the charging circuit of the first connection terminal 10 and the hub 40 is cut off, and charging of the smart mobile phone 2 is stopped.

Moreover, the present invention further includes a button 70, the button 70 is connected to the control unit 50, and the button 70 inputs a selection signal to the control unit 50 for switching the control unit 50 between the forced charging mode and the normal charging mode. In the charging mode, the smart phone 2 is charged by the computer 3 directly and sequentially via the hub 40 and the first connection terminal 10. In the normal charging mode, only when the power supply of the smart mobile phone 2 is lower than a predetermined value, the computer 3 starts to supply power to sequentially charge the smart mobile phone 2 via the hub 40 and the first connection terminal 10.

Moreover, the present invention further includes a first display unit 80, the first display unit 80 is connected to the control unit 50, and the analog signal transmitted by the control unit 50 according to the first connection terminal 10 or the analog sound transmitted by the sound input terminal 20 The signal generates a first display signal and transmits it to the first display unit 80, so that the first display unit 80 indicates whether the first data terminal 12 and the sound input terminal 20 transmit the first data signal or the analog sound signal. Furthermore, the present invention further includes a second display unit 82. The second display unit 82 is connected to the control unit 50. The control unit 50 generates a second display signal according to whether it is switched to the forced charging mode or the normal charging mode, and transmits the second display signal to the first display signal. The second display unit 82 causes the second display unit 82 to indicate that the control unit 50 is switched to the forced charging mode or the normal charging mode.

Referring to FIG. 3, it is a schematic diagram of an embodiment of the present invention. In the figure, the code decoding unit 30, the hub 40, the control unit 50, and the power recognition unit 60 are respectively a chip, or are integrated into a chip group. The first display unit 80 and the second display unit 82 can be a light-emitting diode, and the button 70 can be a capacitive switch. The above components are disposed in a circuit board and are provided by a casing. Wrapped. Moreover, the first connection end 10 and the second connection end 12 of the present invention may be a universal serial bus bar connector, but the present invention is not limited thereto.

In addition, the sound input terminal 20 is one of a headphone plug or a headphone jack, but the present invention is not limited thereto in practice. The first connecting end 10 and the sound input end 20 extend outward from the top end of the housing, and the second connecting end 12 extends outward from the bottom end of the housing. Thus, the signal processing device of the present invention can be made into a compact portable product, which is convenient for carrying.

Please refer to FIG. 4, which is a circuit block diagram of another embodiment of the signal processing apparatus of the present invention. As shown in the figure, the first connector 10 and the voice input terminal 20 are integrated into a connector 61 for connecting to a smart mobile phone. The connector 61 is further connected to a detector 62. The detector 62 is connected to the hub 40. Whether the detection signal processing device is connected between the smart mobile phone and the computer.

Furthermore, a first transmission interface 63 is disposed between the first connection end 10 and the hub 40. A second first transmission interface 64, a first transmission interface 63 and a second transmission are disposed between the code decoding unit 30 and the hub 40. The interfaces 64 are respectively connected to the control unit 50, and the control unit 50 controls the first transmission interface 63 and the second transmission interface 64 to respectively play sounds or transmit manipulation commands.

Furthermore, the first transmission interface 63 and the second transmission interface 64 can be a universal serial interface (USB interface), the power identification unit 60 can also be a universal serial bus interface, and the hub 40 is a universal The serial bus hub (USB Hub), the second connection terminal 12 is also a universal bus connector (USB Connector), so that the first data signal and the analog audio signal are converted into the second data signal, which can be universal The specifications of the serial bus are output to the computer, or the power specifications of the smart mobile phone are recognized.

Moreover, the codec unit 30 is provided with a switch 71 between the power supply terminal Vcc, and the switch 71 is controlled by the control unit 50 to enable the power supply to be input to the code decoding unit 30, or to stop the power supply terminal Vcc from supplying power to the code translation. The code unit 30 is connected between the sound input terminal 20 and the code decoding unit 30, so that the control unit 50 can detect whether the sound input terminal 20 inputs the analog sound signal to the code decoding unit 30. When the control unit 50 detects the analog sound signal, the control unit 50 controls the switch 71 to turn on the power terminal Vcc and the code decoding unit 30, so that the power terminal Vcc can supply power to the code decoding unit 30. On the other hand, when the control unit 50 does not detect the analog audio signal, the control unit 50 controls the switch 71 to make the power supply terminal Vcc and the code decoding unit 30 non-conductive, so that the code decoding unit 30 does not operate, thereby saving power.

Please refer to FIG. 5, which is an embodiment of another different type of signal processing device of the present invention. The first connector 10 and the voice input terminal 20 are integrated into a 30-pin connector 61 that matches the smart phone of the Apple model iphone. The first display unit 80 and the second display unit 82 are respectively a light emitting diode for displaying the state of use of the signal processing device. The second connection terminal 12 is still a universal serial bus connector for the purpose of the signal processing device and its method.

Please also refer to FIG. 6, which is a different embodiment of the signal processing device of the present invention. The difference between the first display unit 80 and the second display unit 82 is integrated into a light-emitting diode for displaying the state of use of the signal processing device.

Please refer to FIG. 7 , which is a flow chart of the operation of the signal processing method of the present invention. In the figure, the signal processing method is applicable to a smart mobile phone, a signal processing device and a computer, and includes the following steps:
(S40) outputting a first data signal by one of the data output/input terminals of a smart mobile phone, or outputting an analog sound signal by one of the sound output terminals of the smart mobile phone;
(S41) receiving, by a first connection end of the signal processing device, the first data signal outputted by the data output/input terminal, and receiving, by the sound input end of the signal processing device, the analog sound signal output by the sound output end;
(S42) one of the signal processing devices of the code decoding unit receives the analog sound signal, and converts the analog sound signal into a corresponding digital sound signal according to the analog sound signal;
(S43) one of the signal processing devices receives the digital audio signal output by the coding and decoding unit, and receives the first data signal output by the first connection end, and generates a corresponding digital audio signal and a second data signal of the first data signal. ;
(S44) the second connection end of one of the signal processing devices receives the second data signal and transmits the second data signal to the computer;
(S45) receiving the second data signal by the computer, and performing corresponding processing according to the second data signal, for directly playing the sound corresponding to the analog sound signal by the speaker of the computer, and performing the operation processing corresponding to the first data signal.

Referring to FIG. 8, the present invention is a flow chart of the operation of the smart phone by the signal processing device. In the figure, it is suitable for use between computers, signal processing devices and smart mobile phones, including the following steps:
(S50) an operation module of the computer receives an input signal input by one of the input devices of the computer;
(S51) the operation module generates a corresponding operation command according to the input signal;
(S52) the computer transmits the operation command to the data output/input of the smart mobile phone sequentially through the second connection end, the hub and the first connection end;
(S53) The smart mobile phone performs corresponding processing according to the operation command.

In an embodiment of the present invention, the manipulation command is to select one of the pre-stored audio electronic files in the smart mobile phone, or to select the previous or next audio electronic file (or may be collectively referred to as a music selection), or to pause. Play, or terminate playback, or turn the power on/off, or force charging. What needs to be emphasized here is that although the computer outputs control commands to the smart mobile phone, the smart mobile phone is played or selected. However, all processed analog audio signals of the smart mobile phone are processed by the signal processing device, and then processed by other sound processing chips or components, and directly transmitted to the speaker connected to the computer to output a corresponding sound.

In summary, the signal processing apparatus and method of the present invention can integrate the digital first signal and the analog analog audio signal of the smart mobile phone, and transmit the second data signal to the computer, so that the present invention It will save the purpose of using the sound input corresponding to the computer. Moreover, the signal processing device of the present invention can be made into a compact portable product, which is convenient for carrying, and solves the problems caused by the conventional products. Furthermore, the analog audio signal of the smart mobile phone is directly transmitted to the speaker connected to the computer through the signal processing device to output the corresponding sound, and the operation module (resident program or firmware) preset in the computer will utilize the foregoing. The method is played, so that the user can listen to the sound without having to perform any corresponding settings on the computer, thereby achieving convenience in use.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

10‧‧‧First connection

12‧‧‧second connection

20‧‧‧Sound input

30‧‧‧Code Decoding Unit

40‧‧‧ hub

50‧‧‧Control unit

60‧‧‧Power Identification Unit

61‧‧‧Connector

62‧‧‧Detector

63‧‧‧First transmission interface

64‧‧‧Second transmission interface

70‧‧‧ button

80‧‧‧First display unit

82‧‧‧Second display unit

2‧‧‧Smart mobile phone

as well as

3‧‧‧ computer

1 is a circuit block diagram of a signal processing device of the present invention;
Figure 2 is a schematic view showing the state of use of the signal processing device of the present invention;
Figure 3 is a schematic view showing an embodiment of the present invention;
Figure 4 is a block diagram of another embodiment of the signal processing apparatus of the present invention;
Figure 5 is a schematic diagram of another embodiment of the signal processing device of the present invention;
Figure 6 is a schematic diagram of still another embodiment of the signal processing device of the present invention;
Figure 7 is a flow chart showing the operation of the signal processing method of the present invention; and Figure 8 is a flow chart showing the operation of the smart phone in the computer of the present invention via the signal processing device.

10‧‧‧First connection

12‧‧‧second connection

20‧‧‧Sound input

70‧‧‧ button

80‧‧‧First display unit

82‧‧‧Second display unit

Claims (12)

A signal processing device comprising:
The first connection end provides a data output/input connected to a smart mobile phone and receives a first data signal output by the data output/input terminal;
a sound input end, which is connected to one of the sound output terminals of the smart mobile phone, and receives an analog sound signal output by the sound output terminal;
The ㄧ code decoding unit is connected to the sound input end and receives the analog sound signal to generate a digital sound signal corresponding to one of the analog sound signals;
The hub is connected to the first connection end and the code decoding unit, and receives the first data signal and the digital audio signal, and generates a second data signal corresponding to the first data signal and the digital audio signal; And the second connection end is connected to the hub, receives the second data signal, and provides connection to a computer to transmit the second data signal to the computer. The signal processing device of claim 1, wherein the second connection end receives a manipulation command sent by the computer, and the manipulation command sequentially passes the second connection end, the hub, and the first connection. The control command is transmitted to the data output/input, and the smart mobile phone performs corresponding processing according to the manipulation command. The signal processing device of claim 2, wherein the manipulation command is generated by an operation module provided by the computer receiving an input signal input by an input device connected to the computer. The signal processing device of claim 1, further comprising: a control unit connected to the code decoding unit, the sound input terminal and the hub;
Wherein, when the control unit does not receive the analog audio signal by the sound input end, the control unit sends a power saving command to the code decoding unit, so that the code decoding unit enters a power saving mode;
When the control unit receives the analog sound signal from the sound input end, the control unit sends a start command to the code decoding unit, and the code decoding unit enters a startup mode and receives the analog sound signal. And generating the digital sound signal. The signal processing device of claim 4, wherein the second connection end receives the power provided by the computer, and sequentially charges the smart mobile phone via the hub and the first connection end. The signal processing device of claim 5, further comprising a button connected to the control unit to input a selection signal to the control unit, so that the control unit is in a forced charging mode and a general charging mode Switch between;
The forced charging mode is that the smart phone is directly powered by the computer and sequentially charges the smart mobile phone via the hub and the first connection end;
In the normal charging mode, when the power supply of the smart mobile phone is lower than a predetermined value, the computer starts to supply power to sequentially charge the smart mobile phone via the hub and the first connection end. The signal processing device of claim 6, further comprising a power identification unit connected to the control unit and receiving power output by the computer, and identifying whether the power output by the computer is Compliance with the charging specifications that the smart mobile phone can receive;
Wherein, when the power output by the computer meets the charging specification that the smart mobile phone can receive, the control unit turns on a charging circuit between the first connection end and the hub, and charges the smart mobile phone;
When the power output of the computer does not meet the charging specification that the smart mobile phone can receive, the charging circuit between the first connection end and the hub is cut off, and charging of the smart mobile phone is stopped. The signal processing device of claim 7, further comprising a first display unit, the first display unit is connected to the control unit, and the control unit is configured according to the first data signal transmitted by the first connection end, Or the analog signal transmitted by the sound input end generates a first display signal and transmits the first display signal to the first display unit, so that the first display unit indicates whether the first connection end and the sound input end transmit the first A data signal or analog signal. The signal processing device of claim 8, further comprising a second display unit connected to the control unit, the control unit being generated according to whether it is switched to the forced charging mode or the normal charging mode a second display signal is transmitted to the second display unit, so that the second display unit indicates that the control unit is switched to the forced charging mode or the normal charging mode. A signal processing method is applied between a smart mobile phone, a signal processing device and a computer, and includes the following steps:
Outputting a first data signal or an analog sound signal, wherein the first data signal is output by one of the data output/input terminals of the smart mobile phone, and the analog audio signal is used by the smart mobile phone One of the output of the sound output;
Receiving, by a first connection end of the signal processing device, the first data signal output by the data output/input terminal, and receiving, by the sound input end of the signal processing device, the output of the sound output end Analog signal
Receiving the analog audio signal by using a code decoding unit provided by the signal processing device, and converting the analog audio signal into a corresponding one-bit audio signal;
Receiving, by the hub of the signal processing device, the digital audio signal output by the code decoding unit, and receiving the first data signal output by the first connection end, and generating the corresponding digital audio signal and the first a second data signal of a data signal;
Receiving, by the second connection end of the signal processing device, the second data signal, and transmitting the second data signal to the computer; and receiving, by the computer, the second data signal, and according to the second data The signal is processed accordingly to directly play the sound corresponding to the analog sound signal from the speaker of the computer, and perform the operation processing corresponding to the first data signal. The method for processing a signal according to claim 10, wherein the computer, the signal processing device and the smart mobile phone further comprise the following steps:
Receiving an input signal input by an input device provided by the computer by an operation module provided by the computer;
And generating, by the operation module, a corresponding operation command according to the input signal;
And transmitting, by the computer, the operation command to the data output/input terminal via the second connection end, the hub and the first connection end; and causing the smart mobile phone to perform corresponding processing according to the operation command. The signal processing method of claim 11, wherein the manipulation command at least selects to play one of the pre-stored audio electronic files in the smart mobile phone or select to play the previous or next audio electronic file or pause playing. Sound electronic file or stop playing the sound electronic file or turn on/off the power or force charging.