TWM669675U - Office automated seating chart communication system and automated communication device - Google Patents

Abstract

An office automated seating chart communication system is provided. The touch screen of a tablet computer displays a seating chart plan. The seating chart plan has a plurality of touchable seating blocks divided according to the seat positions of office personnel, and each seating block displays a person's information. When the tablet computer determines that one of the seating blocks is clicked, the tablet computer transmits a call request to another tablet computer corresponding to the person's information displayed in the clicked seating block through a communication server. When the tablet computer starts a voice call with another tablet computer, the tablet computer controls a directional speaker to limit the transmission range of the sound output by the tablet computer from the other tablet computer to the vicinity of the user's ear position, and the tablet computer controls a directional microphone to receive the user's audio signal and transmit it to the other tablet computer.

Description

Office automated seating chart communication system and automated communication device

The invention relates to a communication system applied to an office, and in particular to an office automated seating table communication system using an electronic office seating table as a communication operation interface.

Currently in an office environment, when one person talks to another person on the phone, they need to hold the receiver with their hands and bring it close to their ears and mouth to make the call. Even though current technology can integrate the answering and receiving functions on the same wireless headset without the need to hold it in the hand, it still needs to be worn on the user's head and close to the ear to make the call. This is not a friendly interface (tool) for people who sit in the office for a long time to answer the phone. In addition, the prerequisite for calling other people in the office is that you must know the other party's phone number or extension number, but when the company's personnel organization is large, it is not easy to quickly find the person to call from the company's employee address book of hundreds or thousands of people. Therefore, it is a topic worth studying if a more friendly communication method can be provided in the office environment to replace the traditional landline phone, so that people in the office environment can talk to other people without holding or wearing any communication devices and without disturbing others during the call.

Therefore, the object of the present invention is to provide an office automated seating chart communication system and an automated communication device, which allow users to have voice calls with other people in the office environment without holding or wearing any device and without disturbing others during the call.

Therefore, the present invention provides an office automated seating chart communication system, comprising a communication server, a tablet computer, a directional speaker and a directional microphone; the tablet computer is disposed at a user end and can communicate with the communication server, and communicate with another tablet computer through the communication server; the directional speaker is disposed at the user end and is controlled by the tablet computer; the directional microphone is disposed at the user end and is controlled by the tablet computer; wherein a touch screen of the tablet computer displays a seating chart plan, the seating chart plan has a plurality of touchable seat blocks divided according to the seat positions of the office personnel, each of the seat blocks displays a person's information; when the tablet computer determines that one of the seat blocks is clicked, the tablet computer touches the touch screen and the touch screen touches the touch screen. The tablet computer transmits a call request corresponding to the personnel information displayed in the clicked seat block to the communication server, so that the communication server transmits the call request to the other tablet computer corresponding to the personnel information; when the tablet computer learns from the communication server that the other tablet computer accepts the call request and starts a voice call, the tablet computer enables a camera to obtain a head image of one of its users, and determines the ear position of the user according to the head image, so as to control the directional speaker to limit the transmission range of the sound output by the tablet computer from the other tablet computer to the vicinity of the ear position of the user, and the tablet computer controls the directional microphone to receive the audio signal of the user so as to transmit the audio signal of the user to the other tablet computer.

Furthermore, the present invention provides an automated communication device, which communicates with another tablet computer through a communication server, and includes a tablet computer, a directional speaker, and a directional microphone; the tablet computer is disposed at a user end and communicates with the other tablet computer through the communication server; the directional speaker is disposed at the user end and is controlled by the tablet computer; the directional microphone is disposed at the user end and is controlled by the tablet computer; wherein a touch screen of the tablet computer displays a seating chart plan, the seating chart plan has a plurality of touchable seat blocks divided according to the seat positions of the office personnel, each of the seat blocks displays a person's information; when the tablet computer determines that one of the seat blocks is clicked, the tablet computer transmits A call request corresponding to the personnel information displayed in the clicked seat block is sent to the communication server, so that the communication server transmits the call request to the other tablet computer corresponding to the personnel information; when the tablet computer learns from the communication server that the other tablet computer accepts the call request and starts a voice call, the tablet computer enables a camera to obtain a head image of one of its users, and determines the ear position of the user based on the head image, so as to control the directional speaker to limit the transmission range of the sound output by the tablet computer from the other tablet computer to the vicinity of the ear position of the user, and the tablet computer controls the directional microphone to receive the audio signal of the user so as to transmit the audio signal of the user to the other tablet computer.

In some implementations of the present invention, the communication server stores a voiceprint data of the user pre-registered, the tablet computer requires the user to input a voice, and converts the voice into a voiceprint and transmits it to the communication server. The communication server allows the tablet computer to log in and provides the seating chart to the tablet computer only after comparing the voiceprint with the voiceprint data stored therein.

In some implementations of the present invention, the communication server also stores an account number and a password of the user, and the tablet computer can log in to the communication server by inputting the account number and the password, and add other voiceprint data of the user to the communication server.

In some implementation forms of the present invention, each seat block in the seating chart plan corresponds to a tablet computer, and the communication server communicates with the tablet computers, and displays each seat block in the seating chart plan corresponding to each non-logged-in tablet computer with a specific background color according to the login status of the tablet computers, and the communication server displays each seat block in the seating chart plan corresponding to each logged-in tablet computer with a different background color according to the usage status of the logged-in tablet computers, and the communication server also marks a working status on each seat block in the seating chart plan according to the personal information of the office staff.

In some implementations of the present invention, when the tablet computer receives a voice input and converts the voice into text and determines that the text is consistent with the person information displayed in one of the seat blocks on the seating chart, the tablet computer highlights the seat block on the seating chart that displays the person information.

In some embodiments of the present invention, when the tablet computer determines that a multi-person call option on the seating chart is clicked, the tablet computer requests to click on multiple seat blocks on the seating chart, and adds the personnel information displayed in the multiple seat blocks clicked to a group window, and when the tablet computer determines that a call option in the group window is clicked, the tablet computer transmits a group call request corresponding to the personnel information added to the group window to the communication server, and the communication server transmits a call request to each corresponding to the personnel information according to the group call request. When the tablet computer receives the call request from the user and the tablet computer learns through the communication server that at least one of the tablet computers accepts the call request and starts the group call, the tablet computer enables the camera to obtain the head image of the user and determines the ear position of the user according to the head image, so as to control the directional speaker to limit the transmission range of the sound output by the tablet computer from each of the other tablet computers in the call to the vicinity of the ear position of the user, and controls the directional microphone to receive the audio signal of the user so as to transmit the audio signal of the user to each of the other tablet computers in the call.

The function of the present invention is that the seating positions of office personnel are electronically converted into a seating chart with a plurality of touchable seating blocks, and when the tablet computer determines that a seating block is clicked, the tablet computer transmits a call request to another tablet computer corresponding to the information displayed in the clicked seating block through the communication server, and when the tablet computer is talking to another tablet computer, the tablet computer controls the transmission range of the sound output from the other tablet computer by the directional speaker to be limited to the vicinity of the ear position of the user, and controls the directional microphone to receive the audio of the user in a concentrated manner, so that the user can have a clear voice call with other people in the office environment without holding or wearing any device and without disturbing others.

Before the present invention is described in detail, it should be noted that similar components are represented by the same reference numerals in the following description.

Referring to FIG1 , there is shown an office automated seating table communication system 100 installed in an office environment, and the main steps of its implementation are shown in FIG2 . The office automated seating table communication system 100 includes a communication server 1 and an automated communication device 2 installed on the seat desk of each person (user) in the office, and the automated communication device 2 includes a tablet computer 3, a directional speaker 4, and a directional microphone 5.

The tablet computer 3 can communicate with the communication server 1, and communicate with the tablet computer 3 of the automated communication device 2 of another person (another user end) through the communication server 1; the directional speaker 4 is arranged on the side of the tablet computer 3 (but not limited to the side, it can also be other appropriate positions) and faces the user, and is electrically connected to the tablet computer 3 to be controlled by the tablet computer 3 to output audio in a specific direction and range; the directional microphone 5 faces the user and is electrically connected to the tablet computer 3 to be controlled by the tablet computer 3 to receive sound from the user, and the directional microphone 5 only receives sound in the direction of the user, and adopts anti-noise technology to eliminate noise in the environment to improve the quality of sound reception. It is worth mentioning that the directional speaker 4 and/or the directional microphone 5 can also be integrated into the tablet computer 3.

As shown in step S1 of FIG. 2 , when the tablet computer 3 is turned on and successfully logs into the communication server 1, the communication server 1 will provide a seating chart 6 of the office as shown in FIG. 3 to the tablet computer 3, so that a touch screen (not shown) of the tablet computer 3 displays the seating chart 6. The seating chart 6 has a plurality of touchable seat blocks 61 divided according to the seat positions of the office personnel. Each seat block 61 displays a personnel information of the user (personnel) of the corresponding seat. The personnel information mainly includes the personnel name, and may further include but not be limited to the employee number and/or extension number.

Specifically, the communication server 1 stores a voiceprint data of each person (user) in the office that is pre-registered therein and bound to the tablet computer 3 used by the user. When the user wants to use the tablet computer 3, the tablet computer 3 will require the user to input a voice. The tablet computer 3 converts the voice input by the user into a voiceprint and transmits it to the communication server 1. The communication server 1 compares the voiceprint transmitted from the tablet computer 3 with the voiceprint data stored therein and corresponding to the tablet computer 3. Only after they are consistent will the communication server 1 allow the tablet computer 3 to log in to the communication server 1 and provide the seating chart 6 to the tablet computer 3 in real time.

In addition, the communication server 1 also stores an account number and a password corresponding to the tablet computer 3 used by the user (for example, set when the user registers). Therefore, when the user cannot log in to the communication server 1 by inputting voice, for example, when the user's voice or tone changes due to throat discomfort or cold, the user can input the account number and the password to the communication server 1 through the tablet computer 3, and the communication server 1 compares the input account number and the password with the input password. When the stored account and password are the same, the communication server 1 allows the tablet computer 3 to log in, and then the user can input the current voice to the tablet computer 3, and the tablet computer 3 converts the current voice into another voiceprint and transmits it to the communication server 1, so that the communication server 1 stores the other voiceprint as a newly added voiceprint data and binds it to the tablet computer 3 used by the user; thereby, the user can log in to the communication server 1 using the current voice.

As shown in step S2 of FIG. 2 , when the tablet computer 3 determines that one of the seat blocks 61 in the seating plan 6 is clicked by its user (hereinafter referred to as user A), the tablet computer 3 transmits a call request corresponding to the personnel information displayed by the clicked seat block 61 to the communication server 1, so that the communication server 1 transmits the call request to another tablet computer 3 corresponding to the personnel information (i.e., another user B); thereby, the seating plan 6 that is visualized makes it easier for the user to find the person he wants to call more intuitively through the visualized memory.

In addition, in addition to using the user's eyes to search for the seat block 61 corresponding to the other user B who wants to call on the seating chart 6, the tablet computer 3 also accepts a voice input by the user (for example, speaking the name, extension or employee number of the person who wants to call). When the tablet computer 3 converts the voice into text and determines that the text is consistent (the same) with the person name, extension or employee number included in the person information displayed in one of the seat blocks 61 on the seating chart 6, the tablet computer 3 highlights the seat block 61 in the seating chart 6 (for example, making the seat block 61 flash or display it in a specific color), allowing the user to directly click on the highlighted seat block 61 to issue a call request to the other tablet computer 3 used by the other user B corresponding to the highlighted seat block 61.

When the other tablet computer 3 receives the call request, it will display an incoming call message containing the caller's (user A) information and ask whether to answer the call. When another user B of the other tablet computer 3 decides to answer the call and clicks an answer option (or icon), the other tablet computer 3 sends a message of accepting the call request to the tablet computer 3 of user A through the communication server 1.

Next, as shown in step S3 of FIG. 2 , when the tablet computer 3 learns through the communication server 1 that the other tablet computer 3 accepts the call request and starts a voice call, the tablet computer 3 causes a camera (built-in camera) to obtain a head image of the user A and recognize the head image to determine the ear position of the user according to the head image. The tablet computer 3 controls the directional speaker 4 to output the sound from the other tablet computer 3 (i.e., the other user B) according to the determination result. The transmission range of the directional speaker 4 at the other user B end is limited to the vicinity of the ear of the user A, so that the user A can only hear the voice of the other user B who is talking to him, and the sound source is concentratedly transmitted to the ear of the user A, just like the other user B (the interlocutor) is standing in front of the user A; similarly, the directional speaker 4 at the other user B end will only allow the other user B to hear the voice of the user A, thereby preventing the user A and the other user B from disturbing others during the conversation.

At the same time, the tablet computer 3 controls the directional microphone 5 to receive the audio of the user A and transmit the audio of the user A to the other tablet computer 3 of the other user B; similarly, the tablet computer 3 of the other user B will also control the directional microphone 5 to receive the audio of the other user B and transmit the audio of the other user B to the tablet computer 3 of the user A. In this way, the user A and the other user B do not need to hold or wear a communication device (such as a handset, earphones or headphones) to conduct a two-way conversation without disturbing others.

In addition, as shown in FIG4 , during a call between user A and another user B, the communication server 1 will cause the two seat blocks 61 corresponding to user A and another user B (e.g., the seat block of “Cheng Yi Ke Chen OO” and the seat block of “9697 (extension) Lin OO” in the seating chart 6 displayed on the tablet computer 3 of other users to be marked with a striking background color (e.g., but not limited to, bright yellow) (indicated by a slash in the figure), so that other personnel in the office can know which personnel are currently on the call from the seating chart 6 displayed on the tablet computer 3 they are using.

Furthermore, the present embodiment also supports group (multi-person) calls, and the implementation method is similar to Line group calls; for example, when user A clicks on a multi-person call option on the seating chart 6 displayed on the tablet computer 3, the tablet computer 3 determines that the multi-person call option is clicked, and then the tablet computer 3 asks user A to click on multiple seat blocks 61 on the seating chart 6 (these seat blocks 61 represent multiple other users that user A wants to call), and adds the personnel information displayed in the clicked seat blocks 61 to a group window (not shown) and displays the group window, and when the tablet computer 3 determines that a call option in the group window is clicked (by user A), the tablet computer 3 sends a group call request corresponding to the personnel information added to the group window to the communication server 1, and the communication The server 1 transmits a call request to each of the tablet computers 3 corresponding to each of the personnel information (i.e., each of the seat blocks) according to the group call request. When the tablet computer 3 of user A learns through the communication server 1 that at least one of the tablet computers 3 that want to conduct a group call accepts the call request and starts the group call, as described above, the tablet computer 3 of user A allows the camera to obtain the head image of user A, and determines the ear position of user A based on the head image, so as to control the directional speaker 4 to limit the transmission range of the sound output by the tablet computer 3 from each of the other tablet computers 3 in the call to the vicinity of the ear position of user A, and control the directional microphone 5 to receive the audio signal of user A to transmit the audio signal of user A to each of the other tablet computers 3 in the call.

In addition, because each seat block 61 in the seating chart plan 6 corresponds to a user and the tablet computer 3 used by the user, and the communication server 1 communicates with the tablet computers 3, the communication server 1 can display each seat block 61 corresponding to each unlogged-in tablet computer 3 in the seating chart plan 6 with a specific background color (for example, but not limited to gray) according to the login status of the tablet computers 3 (logged-in or not logged-in), and display each seat block 61 corresponding to each logged-in tablet computer 3 in the seating chart plan 6 with a specific background color (for example, but not limited to gray) according to the usage status of the logged-in tablet computers 3 (for example, idle or on a call (busy)). The seat blocks 61 corresponding to the computer 3 are displayed with different background colors (for example, the seat block 61 displayed with a bright yellow background color indicates that the call is busy), and the communication server 1 can obtain a work status of each person in the company from the personnel data according to the company's personnel data (for example, vacation/off-site work/remote work/off-duty), and mark the work status on each seat block 61 in the seating chart plan 6, for example, mark different work statuses with different background colors or directly display the work status (vacation/off-site work/remote work/off-duty) in each seat block 61. In this way, office staff can know the work status of other personnel by simply checking the seating chart plan 6 displayed on the tablet computer 3 they use, and decide whether to (can) contact (talk to) a certain person.

In addition, the seating chart 6 of the present embodiment may be the seating chart of the personnel of one floor (or one unit) of a company's office, so if the company has multiple floors (or multiple units), the communication server 1 will provide multiple seating charts 6 corresponding to the multiple floors (or multiple units) to the tablet computer 3 for display, and the user only needs to swipe down or up (or left or right) on the touch screen of the tablet computer 3 to control the tablet computer 3 to switch to displaying the seating chart 6 of the previous floor (or previous unit) or the next floor (or next unit).

In summary, the above embodiment electronically converts the office staff seat positions into a seating plan with a plurality of touchable seating blocks, and the tablet computer 3 displays the seating plan and determines that one of the seating blocks is clicked or receives a voice related to the information displayed by the clicked seating block. The tablet computer transmits a call request to another tablet computer corresponding to the information displayed by the clicked seating block (e.g., a staff member's information) through the communication server 1, so that the user can free his hands and dial the telephone (or extension) of the person to be contacted without picking up the telephone receiver; and the tablet computer When the computer 3 starts a voice call with another tablet computer 3, the tablet computer 3 controls the directional speaker 4 to limit the transmission range of the sound output by the tablet computer 3 from the other tablet computer 3 to the vicinity of the ear position of the user, and the tablet computer 3 controls the directional microphone 5 to receive the audio of the user and resist noise to improve the sound reception quality, so as to transmit clear user audio to the other tablet computer 3. In this way, the user can have a clear voice call with other people in the office environment without holding or wearing any device and will not disturb others during the call, which truly achieves the effect and purpose of the present invention.

However, the above is only an example of the implementation of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the present patent.

100: Office automated seating chart communication system 1: Communication server 2: Automated communication device 3: Tablet computer 4: Directional speaker 5: Directional microphone 6: Seating chart plan 61: Seating area S1~S3: Steps

Other features and functions of the present invention will be clearly shown in the implementation method with reference to the drawings, in which: Figure 1 is a schematic diagram of the hardware device blocks included in an embodiment of the present invention's automated seating chart communication system; Figure 2 is a schematic diagram of the main process steps of the present embodiment; Figure 3 is a schematic diagram of the seating chart plan of the present embodiment; and Figure 4 is a schematic diagram illustrating that the seating chart plan will display the seat block corresponding to the tablet computer on the call with a striking background color (indicated by diagonal lines in the figure).

100: Office automated seating chart communication system

1: Communication server

2: Automated communication device

3: Tablet computer

4: Directional speaker

5: Directional microphone

Claims (12)

An office automated seating chart communication system includes: a communication server; a tablet computer, which is located at a user end and can communicate with the communication server, and communicate with another tablet computer through the communication server; a directional speaker, which is located at the user end and controlled by the tablet computer; and a directional microphone, which is located at the user end and controlled by the tablet computer; wherein a touch screen of the tablet computer displays a seating chart plan, the seating chart plan has a plurality of touchable seat blocks divided according to the seat positions of office personnel, and each seat block displays a person's information; When the tablet computer determines that one of the seat blocks is clicked, the tablet computer transmits a call request corresponding to the personnel information displayed in the clicked seat block to the communication server, so that the communication server transmits the call request to the other tablet computer corresponding to the personnel information; When the tablet computer learns from the communication server that the other tablet computer accepts the call request and starts a voice call, the tablet computer allows a camera to obtain a head image of one of its users, and determines the ear position of the user based on the head image, so as to control the directional speaker to limit the transmission range of the sound output from the other tablet computer by the tablet computer to the vicinity of the ear position of the user, and the tablet computer controls the directional microphone to receive the audio signal of the user to transmit the audio signal of the user to the other tablet computer. The office automated seating chart communication system as described in claim 1, wherein the communication server stores a voiceprint data of the user pre-registered, the tablet computer requires the user to input a voice, and converts the voice into a voiceprint and transmits it to the communication server. The communication server allows the tablet computer to log in and provides the seating chart plan to the tablet computer only after comparing the voiceprint with the voiceprint data stored therein. An office automated seating chart communication system as described in claim 2, wherein the communication server also stores an account number and a password of the user, and the tablet computer can log in to the communication server by inputting the account number and the password, and add other voiceprint data of the user to the communication server. An office automated seating chart communication system as described in claim 2, wherein each seat block in the seating chart plan corresponds to a tablet computer, and the communication server communicates with the tablet computers, and displays each seat block in the seating chart plan corresponding to each unlogged-in tablet computer with a specific background color according to the login status of the tablet computers, and the communication server displays each seat block in the seating chart plan corresponding to each logged-in tablet computer with a different background color according to the usage status of the logged-in tablet computers, and the communication server also marks a working status on each seat block in the seating chart plan according to the personal information of the office personnel. An office automated seating chart communication system as described in claim 1, wherein the tablet computer receives a voice input, converts the voice into text, and when it is determined that the text is consistent with the person information displayed in one of the seat blocks on the seating chart plan, the tablet computer highlights the seat block on the seating chart plan that displays the person information. The office automated seating chart communication system as described in claim 1, wherein when the tablet computer determines that a multi-person call option on the seating chart plan is clicked, the tablet computer requests to click on multiple seat blocks on the seating chart plan, and adds the personnel information displayed in the multiple clicked seat blocks to a group window, and when the tablet computer determines that a call option in the group window is clicked, the tablet computer transmits a group call request corresponding to the personnel information added to the group window to the communication server, and the communication server transmits a call request to each of the communication servers according to the group call request. When the tablet computer corresponding to the personnel information is learned through the communication server that at least one of the tablet computers accepts the call request and starts the group call, the tablet computer enables the camera to obtain the head image of the user, and determines the ear position of the user according to the head image, so as to control the directional speaker to limit the transmission range of the sound output by the tablet computer from each of the other tablet computers in the call to the vicinity of the ear position of the user, and controls the directional microphone to receive the audio signal of the user so as to transmit the audio signal of the user to each of the other tablet computers in the call. An automated communication device communicates with another tablet computer through a communication server, and includes: a tablet computer, which is arranged at a user end and communicates with another tablet computer through the communication server; a directional speaker, which is arranged at the user end and controlled by the tablet computer; and a directional microphone, which is arranged at the user end and controlled by the tablet computer; wherein a touch screen of the tablet computer displays a seating chart plan, the seating chart plan has a plurality of touchable seat blocks divided according to the seat positions of office personnel, and each seat block displays a person's information; When the tablet computer determines that one of the seat blocks is clicked, the tablet computer transmits a call request corresponding to the personnel information displayed in the clicked seat block to the communication server, so that the communication server transmits the call request to the other tablet computer corresponding to the personnel information; When the tablet computer learns from the communication server that the other tablet computer accepts the call request and starts a voice call, the tablet computer allows a camera to obtain a head image of one of its users, and determines the ear position of the user based on the head image, so as to control the directional speaker to limit the transmission range of the sound output from the other tablet computer by the tablet computer to the vicinity of the ear position of the user, and the tablet computer controls the directional microphone to receive the audio signal of the user to transmit the audio signal of the user to the other tablet computer. An automated communication device as described in claim 7, wherein the communication server stores a voiceprint data of the user pre-registered, the tablet computer requires the user to input a voice, and converts the voice into a voiceprint and transmits it to the communication server. The communication server allows the tablet computer to log in and provides the seating chart to the tablet computer only after comparing the voiceprint with the voiceprint data stored therein. The automated communication device as described in claim 8, wherein the communication server also stores an account number and a password of the user, and the tablet computer can log in to the communication server by inputting the account number and the password, and add other voiceprint data of the user in the communication server. An automated communication device as described in claim 8, wherein each seat block in the seating chart corresponds to a tablet computer, and the communication server communicates with the tablet computers and displays each seat block in the seating chart corresponding to each unlogged-in tablet computer with a specific background color according to the login status of the tablet computers, and the communication server displays each seat block in the seating chart corresponding to each logged-in tablet computer with a different background color according to the usage status of the logged-in tablet computers, and the communication server also marks a working status on each seat block in the seating chart according to the personal information of the office staff. An automated communication device as described in claim 7, wherein the tablet computer receives a voice input, converts the voice into text, and when it is determined that the text is consistent with the person information displayed in one of the seat blocks on the seating chart, the tablet computer highlights the seat block on the seating chart that displays the person information. The automated communication device as described in claim 7, wherein when the tablet computer determines that a multi-person call option on the seating chart is clicked, the tablet computer requests to click on a plurality of seat blocks on the seating chart, and adds the personnel information displayed in the plurality of clicked seat blocks to a group window, and when the tablet computer determines that a call option in the group window is clicked, the tablet computer transmits a group call request corresponding to the personnel information added to the group window to the communication server, and the communication server transmits a call request to each of the personnel information according to the group call request. When the tablet computer receives the corresponding tablet computer of the communication, and the tablet computer learns through the communication server that at least one of the tablet computers accepts the call request and starts the group call, the tablet computer enables the camera to obtain the head image of the user, and determines the ear position of the user according to the head image, so as to control the directional speaker to limit the transmission range of the sound output by the tablet computer from each of the other tablet computers in the call to the vicinity of the ear position of the user, and controls the directional microphone to receive the audio signal of the user so as to transmit the audio signal of the user to each of the other tablet computers in the call.