TWI717770B - Method for determining communication status and communication device - Google Patents

Abstract

A method for determining a communication status includes following steps. A first communication device is communicatively coupled to a second communication device. A first communication signal is sent from the first communication device to the second communication device. From a time point when the first communication device sends the first communication signal, it is determined whether a second communication signal from the second communication device is received by the first communication device in a first counting time. According to the result of determining whether the second communication signal from the second communication device is received by the first communication device, a first text message or a second text message is selected to display onto the first communication device.

Description

Method for judging communication state and communication device

The content of the disclosure relates to a method for judging a communication state and a communication device.

With the development of technology, electronic products have more and more functions. In addition to the original functions, more and more automation functions have been added to electronic products in response to the trend toward intelligence. In this regard, since the time for the electronic product to make the judgment can be shorter than the time for the general user to make the judgment, the electronic product with the automatic judgment function can simplify the operation mode. Therefore, electronic products have also begun to be designed to automatically perform specific functions in response to background environmental conditions to facilitate user operations. Therefore, how to expand the automatic judgment function of electronic products so that the electronic products can be operated more humanely has become one of the research and development focuses in related fields.

One embodiment of the disclosure provides a method for judging the communication status, which includes the following steps. Connect the first communication device to the second communication device Set. The first communication signal is transmitted from the first communication device to the second communication device. From the time point when the first communication device transmits the first communication signal, within the first timing time, it is determined whether the first communication device has received the second communication signal from the second communication device. According to whether the first communication device receives the second communication signal from the second communication device, selecting to display the first text message or the second text message on the first communication device.

One embodiment of the present disclosure provides a communication device including processing components, memory, and programs. The memory is electrically connected to the processing element. The program is stored in the memory and used to be executed by the processing component. The program includes at least the following commands. Communication connection with external communication device. The first communication signal is transmitted to the external communication device. From the point of time when the first communication signal is transmitted, within the timing time, it is determined whether the second communication signal from the external communication device is received. According to whether the second communication signal from the external communication device is received, the first text message or the second text message is selected to be displayed.

With the above configuration, when the connection is established, the first communication device as the dialer can determine whether the equipment of the second communication device as the receiver is normal, and the judgment result is superimposed on the dialer and the dialer as a text message. On the image of the receiving end, so that both the dialing end and the receiving end can know whether the conversation can be started.

100‧‧‧First communication device

102‧‧‧First communication signal

104‧‧‧First Broadcast Signal

106‧‧‧Second broadcast signal

108‧‧‧Third broadcast signal

109‧‧‧Fourth Broadcast Signal

110、210‧‧‧Processing element

120, 220‧‧‧Memory

130、230‧‧‧Display

132、234‧‧‧Dial-side image

134、232‧‧‧Receiver image

136, 236‧‧‧Video call icon

138、238‧‧‧Procedure time

140‧‧‧Timer

150, 250‧‧‧Communication unit

160、260‧‧‧Audio output device

170, 270‧‧‧Audio Input

180, 280‧‧‧audio processing unit

190、290‧‧‧Image processing unit

200‧‧‧Second communication device

202‧‧‧Second communication signal

300‧‧‧Third communication device

S‧‧‧Audio content

S10, S20, S30, S40, S50, S60, S70, S80, S90, S100, S110, S120‧‧‧Step

T1‧‧‧First text message

T2‧‧‧Second text message

T3‧‧‧Third text message

T4‧‧‧Fourth text message

FIG. 1 is a schematic diagram showing the system configuration of the first communication device according to some embodiments of the present disclosure.

FIG. 2 is a flowchart of a method for judging the communication status according to some embodiments of the disclosure.

Fig. 3 is a schematic diagram of a system for executing the judgment method of Fig. 2.

FIG. 4 is a schematic diagram of the screen presented by the display of the first communication device in step S110.

FIG. 5 is a schematic diagram of the screen presented by the display of the second communication device in step S110.

FIG. 6 is a schematic diagram of the screen presented by the display of the first communication device in step S120.

FIG. 7 is a schematic diagram of the screen presented by the display of the second communication device in step S120.

Hereinafter, multiple implementations of the disclosure will be disclosed in schematic form. For the sake of clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the content of this disclosure. In other words, these practical details are not necessary in the implementation of this disclosure. In addition, in order to simplify the drawings, some conventionally used structures and elements will be shown in a simple schematic manner in the drawings.

The communication connection mentioned in this article can be through wireless communication connection or through wired communication connection, among which wireless communication includes transmission via Bluetooth, infrared transmission, WIFI wireless network transmission, WT radio wave transmission, NFC short-range wireless communication transmission, ANT+ proximity Distance wireless communication transmission or Zigbee wireless communication (Zigbee) transmission, and wired communication includes transmission through physical cables, such as high-resolution High definition multimedia interface (HDMI), controller area network (CANbus), RS-232 or Ethernet control automation technology (etherCAT).

The method for judging the communication status of the disclosed content can determine whether the device at the receiving end is normal when the connection is established, and superimposing the judgment result on the image of the dialing end and the receiving end in the form of a text message, so that the dialing end and the receiving end You can know whether you can start a conversation, so as to improve the efficiency of the online conversation.

Please see FIG. 1 first, which is a schematic diagram illustrating the system configuration of the first communication device 100 according to some embodiments of the present disclosure. The first communication device 100 includes a processing element 110, a memory 120 electrically connected to the processing element 110, a display 130, a timer 140, a communication unit 150, an audio output 160, an audio input 170, an audio processing unit 180, and image processing Unit 190. In some embodiments, the first communication device 100 may be a portable smart electronic device, a video phone, a notebook computer or a desktop personal computer, but it is not limited to this.

The processing element 110 may include, for example, a central processing unit, a microprocessor, other types of processors, or a combination thereof, but is not limited thereto. The memory 120 may include read-only memory, flash memory, floppy disks, hard disks, optical disks, flash drives, tapes, databases accessible by the network, other computer-readable recording media with the same function, or combinations thereof , But not limited to this. The display 130 may include a liquid crystal display device or a light emitting diode display device, for example. The timer 140 can be implemented by a circuit, such as a digital circuit or an analog circuit, to provide a timing function. The communication unit 150 can be used to provide a wireless communication function or a wired communication function, so that the first communication The communication device 100 can be communicatively connected to an external communication device, and the communication unit 150 can be implemented by hardware, software or firmware of the communication device.

The audio output unit 160 may include, for example, a speaker, a speaker, or other devices suitable for outputting sound, and it may be electrically connected to the processing element 110 through wired communication or wireless communication. The audio input 170 may include, for example, a microphone, such as a dynamic microphone or a condenser microphone, which may be electrically connected to the processing element 110 through wired communication or wireless communication. The audio processing unit 180 and the image processing unit 190 can be electrically connected to the memory 120, wherein the audio processing unit 180 and the image processing unit 190 can be implemented by the hardware, software or firmware of the first communication device 100. The audio processing unit 180 can convert analog audio signals into digital audio signals, and vice versa. The image processing unit 190 can convert the analog image signal into a digital image signal, and vice versa. The above conversion can be realized by compilation or translation. Through the conversion between analog and digital, it is advantageous for the first communication device 100 to access audio-visual signals.

Please refer to FIGS. 2 and 3 at the same time. FIG. 2 is a flowchart of a method for determining a communication state according to some embodiments of the present disclosure, and FIG. 3 is a schematic diagram of a system that executes the method of determining in FIG. 2 . The aforementioned first communication device 100 can be communicatively connected with an external communication device, and through the flowchart depicted in FIG. 2 to determine whether it can start a voice dialogue with the external communication device.

As shown in Figure 2, the method for judging the communication status includes steps S10, S20, S30, S40, S50, S60, S70, S80, S90, S100, S110, and S120. Step S10 is to establish a connection. Step S20 is to generate a first communication signal. Step S30 is to transmit the first communication signal. Step S40 is timing. Step S50 is to determine whether the timing time reaches the threshold value. Step S60 is output sound News content. Step S70 is to receive audio content. Step S80 is to generate a second communication signal. Step S90 is to transmit the second communication signal. Step S100 is to determine whether the second communication signal is received. Step S110 is to output the first broadcast signal. Step S120 is to output the second broadcast signal.

The steps in the method of judging the communication status will be described below in conjunction with Figure 3. In Figure 3, the first communication device 100 and the second communication device 200 can establish a connection, wherein the second communication device 200 is an external communication device relative to the first communication device 100, and the first communication device 100 and the second communication device 200 can also be called the dialing end and the receiving end respectively.

The second communication device 200 may include the same components as the first communication device 100, such as a processing component 210, a memory 220, a display 230, a communication unit 250, an audio output 260, an audio input 270, an audio processing unit 280, and an image Processing unit 290. The component configuration and function of each component of the second communication device 200 can be similar to those of the first communication device 100, and will not be repeated here. In addition, in this embodiment, the second communication device 200 omits the timer 140 of the first communication device 100, that is, there may be differences between the first communication device 100 and the second communication device 200. However, the content of the present disclosure is not limited thereto. In other embodiments, the first communication device 100 and the second communication device 200 may be completely the same without any difference.

In the following description, each step can be written in a program, where the program is stored in the corresponding memory (ie, memory 120 or 220) and used by the corresponding processing element (ie, processing element 110 or 210) Executed. That is, the steps described below can be regarded as instructions written in the program, and these instructions are executed by the corresponding processing element (ie, the processing element 110 or 210).

In step S10, the first communication device 100 may be communicatively connected to the second communication device 200 to establish a connection, where the connection includes making a video call or other audio-visual communication activities. After the connection is established, the first communication device 100 and the second communication device 200 can exchange information via network signals, for example, can transmit network packets in both directions. In this regard, when a connection is established, the first communication device 100 can receive the connection signal transmitted from the communication unit 250 of the second communication device 200 through the communication unit 150, so that the first communication device 100 can determine that the connection has been established . In some embodiments, the connection signal transmitted from the communication unit 250 can be driven and generated when the second communication device 200 changes its state. For example, when a user at the receiving end hears an incoming call ringtone from the second communication device 200 and presses the answer button, the processing element 210 can drive the communication unit 250 to send a connection signal. In the following steps, the data transmission method or the data exchange method between the first communication device 100 and the second communication device 200 may be through a network packet, which is described first.

In step S20, when the first communication device 100 receives the connection signal transmitted from the second communication device 200, the first communication device 100 may generate a first communication signal 102, where the first communication signal 102 may include the first audio signal .

In step S30, the first communication device 100 can transmit the first communication signal 102 to the second communication device 200 through the communication unit 150, and when the first communication signal 102 is transmitted to the second communication device 200, step S40 can be entered. In step S40, from the time point when the communication unit 150 transmits the first communication signal 102, the timer 140 can start timing, and then step S50 is entered. In step S50, the timing time can be set first as the threshold value. For example, the timing time can be greater than 200 milliseconds and less than or equal to 300 milliseconds, and such a time setting interval can be compatible with the acceptable delay time range of network packets. When the timer 140 is running When the time reaches the threshold, a signal can be sent to the processing element 110 to make the processing element 110 perform the next step (for example, step S100, which will be described later).

After the first communication signal 102 is transmitted to the second communication device 200, step S60 can be entered again. In step S60, when the second communication device 200 receives the first communication signal 102 through the communication unit 250, the audio processing unit 280 can convert the first audio signal of the first communication signal 102 into a format that can be output by the audio output 260. Then the first audio signal of the first communication signal 102 can be output by the audio output 260, for example, the marked audio content S is output.

In step S70, the audio content S can be received by the audio input 270. The audio content S output by the audio output unit 260 may have an audio range beyond what is perceivable by the human ear. For example, in some embodiments, the audio content S corresponding to the first audio signal may have audio below 20 Hz or above 20000 Hz. , So as to avoid human ear detection. Alternatively, it may also be presented as a short prompt tone. For example, in some embodiments, the duration of the audio content S corresponding to the first audio signal may be 100 ms. In addition, the audio content S corresponding to the first audio signal can be divided into five to ten stages, and the duration of each stage can be 10 milliseconds to 20 milliseconds. With such a design, the user experience can be prevented from being damaged.

In step S80, when the audio input 270 receives the audio content S, the audio processing unit 280 can convert and generate the second communication signal 202 according to the audio content S. In other words, the second communication signal 202 can be regarded as being generated through the feedback of the first communication signal 102. Therefore, the second communication signal 202 may include the second audio signal, and the second audio signal corresponds to the first audio file, for example, the respective spectrums will have the same characteristic value. Then, in step S90, the second communication signal 202 can be transmitted to the communication list of the first communication device 100 through the communication unit 250 Yuan 150.

In step S100, determining whether the second communication signal 202 is received can be performed by determining the feedback of the first communication signal 102. Through the foregoing steps, after the connection is established, when the equipment of the second communication device 200 is normal, the first communication device 100 can receive the second communication signal 202. Conversely, if the device of the second communication device 200 is abnormal (for example, the audio output device 260 or the audio input device 270 is abnormal) after the connection is established, the first communication device 100 cannot receive the second communication signal 202. In other words, the first communication device 100 can use the second communication signal 202 as a judgment basis, and each judgment result will be described below.

The first communication device 100 can determine whether the second communication signal 202 from the second communication device 200 is received within the time set in step S50. If the first communication device 100 does not receive the second communication signal 202 within the timing time, it is determined that the equipment of the second communication device 200 is abnormal. For example, when the timing time is set to 100 milliseconds, if the first communication device 100 does not receive the second communication signal 202 within 100 milliseconds from the time point of step S30, it is determined that the second communication device 200 The device is abnormal.

If the first communication device 100 receives the second communication signal 202 within the timing time, it will then determine whether the second communication signal 202 is generated through the feedback of the first communication signal 102. For example, since the second audio signal of the second communication signal 202 corresponds to the first audio file of the first communication signal 102, they will have the same characteristic value in their respective spectrums. Therefore, the first audio signal and the Whether the two audio signals have the same characteristic value is used as a judgment basis to determine whether the second communication signal 202 is generated through the feedback of the first communication signal 102. In some embodiments, Fast Fourier Transform (Fast Fourier Transform) Transform; FFT) or other spectrum conversion methods to transform the first audio signal and the second audio signal into frequency domain signals for comparison.

When the first audio signal and the second audio signal are judged to have the same characteristic value, it can be regarded that the second communication signal 202 is generated by the feedback of the first communication signal 102, and it is determined that the first communication device 100 and the second communication The connection between the devices 200 can talk. Conversely, when the first audio signal and the second audio signal are judged not to have the same characteristic value, it can be regarded that the second communication signal 202 is not generated by the feedback of the first communication signal 102, and it is determined that the second communication device 200 The device is abnormal. In addition, in some implementations, the amplitude ratio of the second audio signal to the first audio signal can be added to the judgment basis. For example, when the amplitude ratio of the second audio signal to the first audio signal is in the interval greater than 0.8 and less than 1, It is further determined that the second communication signal 202 is generated by the feedback of the first communication signal 102.

According to the judgment result of the first communication device 100 in step S100, it is possible to choose to enter step S110 or S120. Furthermore, if it is determined that the established connection can be called, then step S110 is entered. If it is determined that the equipment of the second communication device 200 is abnormal, step S120 is entered.

Please see FIG. 2 and FIG. 4 at the same time. FIG. 4 is a schematic diagram of the screen displayed by the display 130 of the first communication device 100 in step S110. In FIG. 4, the display screen of the display 130 may at least include a dialing end image 132, a receiving end image 134, a video call icon 136, and a progress time 138. In step S110, when it is judged that the connection is available for a call, a first text message T1 can be displayed, where the first text message T1 is displayed on the receiving end image 134, and may include the semantics of "call available" to notify the caller Users can start to enter Line dialogue. For example, the first text message T1 can be "Able to start a conversation with a new participant", and the "new participant" of the first text message T1 can also be replaced with the IP location of the receiver. In addition, the way of displaying the first text message T1 may be to directly superimpose the first text message T1 on the receiving end image 134.

Please see FIG. 2 and FIG. 5 at the same time. FIG. 5 is a schematic diagram of the screen presented by the display 230 of the second communication device 200 in step S110. In FIG. 5, the display screen of the display 230 may at least include the receiving end image 232, the dialing end image 234, the video call icon 236, and the progress time 238. On the other hand, in step S110, the first broadcast signal 104 can be transmitted from the communication unit 150 to the communication unit 250, so that the second communication device 200 can display a second text message T2 corresponding to the first broadcast signal 104, wherein the second text The message T2 is displayed on the image 234 of the dialing end, and may include the meaning of "calling available" to inform the user at the receiving end that the conversation can be started. For example, the second text message T2 can be "Able to have a conversation with conference participants", and the "Conference participant" of the second text message T2 can also be replaced by the IP location of the dialer. In addition, the method of displaying the second text message T2 may be to directly superimpose the second text message T2 on the dial-end image 234.

Please see FIG. 2 and FIG. 6 at the same time. FIG. 6 is a schematic diagram of the screen displayed by the display 130 of the first communication device 100 in step S120. The presentation screen of Figure 6 is similar to that of Figure 4, so it will not be repeated here. In step S120, when it is determined that the equipment of the second communication device 200 is abnormal, a third text message T3 can be displayed, where the third text message T3 is displayed on the receiving end image 134, and can contain the semantic meaning of "equipment abnormality". Notify the user at the originating end that there is not yet Have a conversation. For example, the third text message T3 can be "New participant equipment abnormality", and the "New participant" of the third text message T3 can also be replaced with the IP location of the receiver. In addition, the way of displaying the third text message T3 may be to directly superimpose the third text message T3 on the receiving end image 134.

Please see FIG. 2 and FIG. 7 at the same time. FIG. 7 is a schematic diagram of the screen presented by the display 230 of the second communication device 200 in step S120. The presentation screen of Fig. 7 is similar to that of Fig. 5, so it will not be repeated. In step S120, the second broadcast signal 106 can be transmitted from the communication unit 150 to the communication unit 250, so that the second communication device 200 can display the fourth text message T4 corresponding to the second broadcast signal 106, where the fourth text message T4 is displayed The image 234 on the dialing end may include the meaning of "device abnormality" to notify the user at the receiving end that a conversation can be started. For example, the fourth text message T4 can be "the audio device detects an abnormality and cannot communicate with the other party", and the "conference participant" of the fourth text message T4 can also be replaced by the IP location of the dialer. In addition, the way of displaying the fourth text message T4 may be to directly superimpose the fourth text message T4 on the dial-end image 234.

The duration of the text message on the display 130 or 230 is greater than 0 seconds and less than or equal to 3 seconds. That is, the above text message will not be displayed after a short period of time in the dialogue, which is helpful to improve the user's operating experience. On the other hand, it can also be caused by the user's action through the input device and disappear immediately. For example, when the above-mentioned text message appears on the display 130 or 230, the user can click the corresponding menu to make the above-mentioned text message disappear. ; Alternatively, the first communication device 100 (or the second communication device 200) can also be designed as when the user operates the input device (such as moving the mouse, clicking the mouse button or clicking the keyboard button Key), the above text message will disappear accordingly. With the above configuration, when it is judged that the connection is available for a call, the users at the dialing end and the known receiving end can know whether they can directly speak, thereby omitting the additional confirmation steps of both parties to improve the dialogue efficiency. When judging that the device is abnormal, the user at the dialing end can know that the other party is not yet able to participate in the conversation, while the user at the receiving end can know that his own device is abnormal to benefit The user at the receiving end performs repairs.

In addition, although the above steps are described in terms of a dialogue between two parties, the content of this disclosure is not limited to this. In some implementations, a third party can also be added to the company during the dialogue between the two parties. In the line, and the dial-up terminal will still judge whether the third party has equipment abnormality. For example, in Figure 3, the first communication device 100 as a dial-up terminal can be connected to the third communication device 300 during the connection, and the steps S10 to S100 will also be performed as described above. Repeat.

If it is determined that the connected third communication device 300 can make a call, the display 130 of the first communication device 100 can be superimposed on the receiving end image 134 to notify the originating end by superimposing the text message "You can start a conversation with a new participant" Users (for example, as shown in Figure 4). The first communication device 100 can then transmit the broadcast signal to the second communication device 200, so that the display 230 of the second communication device 200 can be superimposed on the dialing end image 234 by superimposing the text message "You can start a conversation with a new participant" To notify the user at the dialing end (for example, as shown in Figure 5). For the third communication device 300 that joins the connection, the third broadcast signal 108 sent from the first communication device 100 is used to superimpose the text message "Able to have a conversation with conference participants" to notify the new connection The user who is calling.

Conversely, if it is determined that the third communication device 300 added to the connection is equipment abnormal, the display 130 of the first communication device 100 can superimpose the text message "The new participant's audio equipment is abnormal, and the dialogue cannot be conducted" on the receiver image 134. To notify the user at the originating end (for example, as shown in Figure 6). The first communication device 100 can then transmit broadcast signals to the second communication device 200, so that the display 230 of the second communication device 200 can be superimposed on the dialing end image 234 by superimposing the text message "New participant’s audio equipment is abnormal and unable to proceed. Dialogue" to notify the user at the dialing end (for example, as shown in Figure 7). For the third communication device 300 that joins the connection, the fourth broadcast signal 109 sent from the first communication device 100 is used to notify the new addition by superimposing the text message "The audio equipment has detected an abnormality and cannot talk to the other party." Connected users.

Other details of adding a third party to the connection can be the same as the details of the aforementioned Figures 4 to 7, for example, the user's IP location can be added to the text message, which will not be described here.

In summary, the method for judging the communication status of the disclosed content can determine whether the device at the receiving end is normal when the connection is established, and superimposing the judgment result on the images of the dialing end and the receiving end in the form of text messages, so that Both the dialing end and the receiving end can know whether the conversation is currently available. In addition, when the device is abnormal, the receiver can also learn from the text message that it cannot communicate with the dialer due to the device's abnormality, so that the user at the receiver can make repairs. On the other hand, during the connection dialogue between the two parties, the third party can be added to the connection, and the judgment result of the third party’s equipment will be displayed on the image of the third party, so that the three parties can know whether the third party is Can already participate in the conversation. Therefore, the method for judging the communication status of the disclosed content can be adapted to be applied to the meeting and improve the progress of the meeting. effectiveness.

Although the content of this disclosure has been disclosed in a variety of ways as above, it is not intended to limit the content of this disclosure. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of the content of this disclosure. Therefore, The scope of protection of the contents of this disclosure shall be subject to those defined by the attached patent scope.

100‧‧‧First communication device

130‧‧‧Display

132‧‧‧Dial-side image

134‧‧‧Receiver image

136‧‧‧Video call icon

138‧‧‧Procedure time

T1‧‧‧First text message

Claims (8)

A method for judging a communication state, comprising: connecting a first communication device to a second communication device; transmitting a first communication signal from the first communication device to the second communication device, wherein the first communication signal includes a A first audio signal; within a first timing time from the time point when the first communication device transmits the first communication signal, it is determined whether the first communication device has received a second communication device from the second communication device Communication signal, wherein the second communication signal includes a second audio signal; and comparing the first audio signal with the second audio signal to determine whether the first audio signal and the second audio signal have the same characteristic value, When it is judged to have the same characteristic value, a first broadcast signal is transmitted from the first communication device to the second communication device, so that the second communication device displays a text message corresponding to the first broadcast signal, and selects the The first communication device displays a first text message or a second text message. For example, the method for judging the communication status described in item 1 of the scope of patent application further includes: communicating the first communication device to a third communication device; transmitting a third communication signal from the first communication device to the third communication Device; from the time point when the first communication device transmits the third communication signal, within a second timing time, determine whether the first communication device has received a fourth communication signal from the third communication device; And according to whether the first communication device receives the fourth communication signal from the third communication device, select to transmit a third broadcast signal from the first communication device Signal or a fourth broadcast signal to the second communication device and to the third communication device, so that the second communication device and the third communication device display a text message corresponding to the third broadcast signal or the fourth broadcast signal . According to the method for judging the communication status described in item 1 of the scope of patent application, the duration of displaying the first text message or the second text message on the first communication device is greater than 0 seconds and less than or equal to 3 seconds. For example, the method for judging the communication status described in item 1 of the scope of patent application further includes: generating the first communication signal when the first communication device receives a connection signal transmitted from the second communication device. According to the method for judging the communication status described in item 1 of the scope of patent application, the first timing time is greater than 0 milliseconds and less than or equal to 100 milliseconds. Such as the method for judging the communication status described in item 1 of the patent application, wherein the first communication signal includes an audio signal, and the second communication device that receives the first communication signal outputs the audio signal through an audio output device, And the second communication signal is formed by receiving and converting the output audio signal through an audio input device. The method for judging the communication status as described in item 6 of the scope of the patent application, wherein the audio signal has a duration of 100 milliseconds and has an audio frequency below 20 Hz or above 20000 Hz. A communication device includes: a processing element; a memory, which is electrically connected to the processing element; and a program, stored in the memory and used to be executed by the processing element The program includes at least the following instructions: communicating with an external communication device; transmitting a first communication signal to the external communication device, wherein the first communication signal includes a first audio signal; self-transmitting the first communication signal From the point of time, within a timing period, it is determined whether a second communication signal from the external communication device is received, wherein the second communication signal includes a second audio signal; and the first audio signal is compared with the The second audio signal is used to determine whether the first audio signal and the second audio signal have the same characteristic value. When it is determined to have the same characteristic value, a first broadcast signal is transmitted from the communication device to the external communication device, so that The external communication device displays a text message corresponding to the first broadcast signal, and selects to display a first text message or a second text message.

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