JP6133736B2 - Intercom system - Google Patents

Description

  The present invention relates to an intercom system.

  2. Description of the Related Art Conventionally, an intercom system including a collective entrance machine provided with an entrance camera and a monitor on which an image of the entrance camera is displayed has been proposed (see Patent Document 1). In the intercom system disclosed in Patent Document 1, for example, a visitor can check his / her video by looking at a monitor of an entrance hall.

JP 2000-092223 A

  In addition to the intercom system described in Patent Document 1, for example, from the viewpoint of improving crime prevention, in order to make it easier for residents to check visitors, the entrance door is connected to a room entrance connected to the entrance hall. It is conceivable to provide a video operation unit that can zoom and pan / tilt the video obtained by the camera of the machine and displayed on the monitor of the living room machine.

  However, in the configuration in which the above-described video operation unit is added to the configuration of Patent Document 1, when the resident operates the video operation unit of the room unit to zoom or pan / tilt the image, the image is displayed on the monitor of the entrance collective machine. Similarly, the image is zoomed or pan-tilted. For this reason, even when the resident wants to confirm the visitor while staying away, for example, the visitor may notice that the resident is at home.

  An object of this invention is to provide the intercom system which can confirm a visitor without noticing a visitor.

  The intercom system of the present invention that can solve the above-mentioned problems is an entrance machine for calling a resident and making a call, and a room machine installed in the room and responding to a call from the entrance machine, The entrance machine includes an entrance camera that acquires an image around the entrance machine, and an entrance display unit that displays the image, and the room unit displays the image. And a video operation unit for performing a display change process for changing the video acquired by the entrance camera and displayed on the room display unit, and a call operation is performed on the entrance machine. In this case, an image acquired by the entrance camera is displayed on the entrance display unit and the living room display unit, and an operation on the image operation unit is invalidated within a predetermined time. After the predetermined time has elapsed since the calling operation was performed in the related machine, the video acquired by the entrance camera after the predetermined time has elapsed is stopped from being displayed on the entrance display unit, and the video operation is performed. This is characterized in that the operation on the part is made effective.

According to this aspect, even if the resident operates the video operation unit within a predetermined time, the video displayed on the entrance display unit and the room display unit does not change, and the visitor is displayed on the entrance display unit. You can't tell if a resident is at home or not.
In addition, even if a resident who is called by a visitor tries to confirm the visitor by operating the video operation unit to change the video after a predetermined time has elapsed, for example, for crime prevention, this operation is performed. The video is not displayed on the entrance display. In this way, even if the visitor looks at the entrance display section, the visitor cannot know whether the resident is at home because the state of the image displayed on the living room display section is unknown. . Therefore, the resident can confirm the visitor without noticing the visitor.

  In the intercom system of the present invention, at least one of the center position or the scale of the image displayed on the entrance display unit and the living room display unit within the predetermined time is automatically changed in a predetermined pattern. Anyway.

  According to this aspect, an image in which the center position and scale are automatically changed in a predetermined pattern is displayed on the entrance display unit. At this time, even if the visitor sees the image displayed on the entrance display section, it is not known whether the image automatically changes in a predetermined pattern due to the operation of the resident. You cannot tell if you are at home. On the other hand, since the visitor is aware that his / her video is captured in a plurality of patterns, the crime prevention performance is improved.

  In the intercom system of the present invention, when the calling operation is performed, a recording display indicating that the video acquired by the entrance camera is being recorded is displayed on the entrance display unit. Also good.

  According to this aspect, the security can be improved because the visitor can be aware that the video acquired by the entrance camera is being recorded.

  The intercom system of the present invention is an intercom system including an entrance machine for calling a resident and making a call, and an in-room unit installed in the living room and responding to a call from the entrance machine. The entrance machine includes an entrance camera that acquires an image around the entrance machine, and an entrance display unit that displays the image, and the room machine includes a room display unit that displays the image, A video operation unit for performing a display change process for changing the video acquired by the entrance camera and displayed on the room display unit, and when the call operation is started in the entrance machine, the entrance The video acquired by the camera is displayed on the entrance display unit, and after the calling operation is finished, the video acquired by the entrance camera is displayed on the room display unit and the call Operation image being acquired after completion at the entrance camera is characterized in that it is displayed on the entrance display unit is stopped.

  According to this aspect, after the call operation by the visitor is completed, the resident, for example, operates the video operation unit to change the video for the purpose of crime prevention and surely confirms the visitor. However, the operated image is not displayed on the entrance display section. Accordingly, even if the visitor looks at the entrance display section, the visitor display section does not know how the video displayed on the living room display section changes, and thus cannot recognize whether the resident is at home. Therefore, the resident can confirm the visitor without noticing the visitor.

  In the intercom system of the present invention, after the calling operation is finished, a recording display indicating that the video acquired by the front camera is being recorded is displayed on the entrance display unit. Also good.

  According to this aspect, the security can be improved because the visitor can be aware that the video acquired by the entrance camera is being recorded.

  The intercom system of the present invention is an intercom system including an entrance machine for calling a resident and making a call, and an in-room unit installed in the living room and responding to a call from the entrance machine. The entrance machine includes an entrance camera that acquires an image around the entrance machine, and an entrance display unit that displays the image, and the room machine includes a room display unit that displays the image, And a video operation unit for performing a display change process for changing a video acquired by the entrance camera and displayed only on the living room display unit.

  According to this aspect, since the visitor does not know the state of the change in the image displayed on the room display portion even when looking at the entrance display portion, the visitor is aware whether the resident is at home. I can't. Therefore, the resident can confirm the visitor without noticing the visitor.

  ADVANTAGE OF THE INVENTION According to this invention, the intercom system which can confirm a visitor without noticing a visitor can be provided.

It is a schematic block diagram of the intercom system which shows embodiment of this invention. It is a block diagram which shows the structure of a collective entrance machine. It is a block diagram which shows the structure of a control apparatus. It is a block diagram which shows the structure of a room machine. It is a flowchart explaining the flow of control by the control apparatus of an intercom system. It is a flowchart explaining the flow of control by the control apparatus of the intercom system which concerns on other embodiment.

Hereinafter, an example of an embodiment of an intercom system according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, an interphone system 10 according to the present embodiment is installed in an apartment house such as a condominium or a single-family house, and includes an entrance camera 1, a collective entrance machine (an example of an entrance machine) 2, a control device. 3 and living room machine 4 are provided. In this example, the case where the intercom system 10 is installed in an apartment will be described as an example. Therefore, in this embodiment, a plurality of room units 4 are provided, and each room unit 4 is installed in each dwelling unit.

  The entrance camera 1 is a camera that is installed near the entrance of an apartment house and photographs the entrance and its surroundings.

  The collective entrance machine 2 is for a visitor to perform a predetermined calling operation when calling a resident in a room in a dwelling unit. The collective entrance machine 2 includes an entrance microphone 14, an entrance speaker 15, an entrance operation unit 16, an entrance display unit 17, and an entrance camera 20. The entrance microphone 14 and the entrance speaker 15 are for inputting and outputting voice when a visitor makes a call with a resident. The entrance operation unit 16 is a part operated by a visitor when the visitor performs a call operation for calling a resident. The entrance display unit 17 displays the content of the operation at the entrance operation unit 16 and the video taken by the entrance camera 20. The entrance camera 20 is for photographing a visitor who performs a call operation and a video around the visitor.

  As shown in FIG. 2, the collective entrance machine 2 includes a communication circuit 11, a call circuit 12, a control unit 13, a camera video circuit 18, a switching circuit 19, and an entrance camera video circuit 21. The communication circuit 11, the call circuit 12, and the camera video circuit 18 are connected to the control unit 13 and controlled by the control unit 13.

  The communication circuit 11 performs communication of various signals between the control unit 13 of the collective entrance 2 and the control device 3. An entrance microphone 14 and an entrance speaker 15 are connected to the call circuit 12. The call circuit 12 transmits the audio signal from the entrance microphone 14 to the control unit 13 and outputs the audio signal from the control unit 13 to the entrance speaker 15. An entrance operation unit 16 is connected to the control unit 13, and an input signal is transmitted from the entrance operation unit 16 to the control unit 13 when operated by the entrance operation unit 16. Further, an entrance display unit 17 is connected to the control unit 13, and a video signal is output from the control unit 13 to the entrance display unit 17.

  An entrance camera 20 and a switching circuit 19 are connected to the camera video circuit 18. The camera video circuit 18 transmits the video signal from the entrance camera 20 to the switching circuit 19. The entrance camera 1 and the switching circuit 19 are connected to the entrance camera video circuit 21. The entrance camera video circuit 21 transmits the video signal from the entrance camera 1 to the switching circuit 19. The switching circuit 19 transmits either the video signal from the entrance camera 1 or the entrance camera 20 to the communication circuit 11.

  The control device 3 performs overall control of the intercom system 10 and includes two communication circuits 31 and 32 and a CPU (Central Processing Unit) 33 as a main component as shown in FIG. . The communication circuit 31 is connected to the collective entrance machine 2 and performs communication of various signals between the collective entrance machine 2 and the CPU 33 of the control device 3. The communication circuit 32 is connected to the room machine 4 and performs communication of various signals between the room machine 4 and the CPU 33 of the control device 3.

  As shown in FIG. 1, the room unit 4 is for responding to a call by a visitor from the collective entrance 2, and is installed in each dwelling unit. Each room device 4 includes a room microphone 44, a room speaker 45, a room display unit 46, and a room operation unit (an example of a video operation unit) 47. The room microphone 44 and the room speaker 45 are used to input and output audio when a resident makes a call with a visitor. The room display unit 46 displays an image taken by the entrance camera 20 or the entrance camera 1.

  The room operating unit 47 performs a predetermined response operation when the resident makes a call in response to a call from a visitor, or performs a display change process for changing a video displayed on the room display unit 46. Is. The display change process by the room operation unit 47 may be performed in image processing or may be performed by changing the posture of the camera. For example, the display change process of this example is a process of processing a wide image captured and acquired by the entrance camera 20 including a wide-angle camera into a divided image, or processing a predetermined portion of the wide image into an enlarged image. The image processing may be performed. Further, the display change process of this example may be performed by zooming the image or performing a pan / tilt operation by changing the position or posture of the entrance camera 20.

  It is also possible to switch the input by the switching circuit 19 by operating the room operation unit 47 and to switch the image of the room display unit 46 between the image of the entrance camera 20 and the image of the entrance camera 1. Furthermore, the room operating unit 47 also includes an unlocking switch. The unlocking switch of the living room operation unit 47 is for performing a releasing operation for opening the entrance door, and the entrance is unlocked by pressing the unlocking switch.

  As shown in FIG. 4, each room unit 4 includes a communication circuit 41, a call circuit 42, and a control unit 43. The communication circuit 41 and the call circuit 42 are connected to the control unit 43 and are controlled by the control unit 43.

  The communication circuit 41 communicates various signals between the control unit 43 of the living room machine 4 and the control device 3. A room microphone 44 and a room speaker 45 are connected to the call circuit 42. The call circuit 42 transmits the audio signal from the room microphone 44 to the control unit 43 and outputs the audio signal from the control unit 43 to the room speaker 45. A room operating unit 47 is connected to the control unit 43, and an input signal is transmitted from the room operating unit 47 to the control unit 43 when operated by the room operating unit 47. In addition, a room display unit 46 is connected to the control unit 43, and a video signal is output from the control unit 43 to the room display unit 46. In the living room machine 4, the video signal subjected to the display change process by the living room operation unit 47 is transmitted to the living room display unit 46 via the control unit 43. In the intercom system 10, the video signal subjected to the display change process by the room operation unit 47 can be transmitted to the entrance display unit 17 of the collective entrance 2 via the control device 3.

  Next, control by the control device 3 of the interphone system 10 will be described with reference to a flowchart shown in FIG.

When a visitor presses the button of the entrance operation unit 16 of the collective entrance 2 to call a resident in the dwelling unit, a call operation for the resident in the dwelling unit is started (step S11).
Then, in the collective entrance machine 2, the entrance camera 20 is driven, and an image of a visitor waiting around the collective entrance machine 2 (for example, in front of the collective entrance machine) is photographed by the entrance camera 20 (step S12).

  Furthermore, in the collective entrance machine 2, the entrance display unit 17 is activated (step S13), and the entrance camera image photographed by the entrance camera 20 is displayed on the entrance display unit 17 (step S14).

  When the call operation is started by the visitor (step S11) and the call operation is terminated by the visitor pressing the call button of the entrance operation unit 16 (step S15), the room of the room unit 4 of the dwelling unit to be called. A ringing tone is emitted from the speaker 45 (step S16).

  Further, in the room unit 4, the room display unit 46 is operated (step S17), and the entrance camera image taken by the entrance camera 20 is displayed on the room display unit 46 (step S18).

  Here, when the resident operates the room operation unit 47, a display change operation determination is performed as to whether or not an operation of the display change process has been performed on the entrance camera image photographed by the entrance camera 20 (step). S19).

  In this display change operation determination (step S19), when a display change operation is performed on the entrance camera image (step S19: YES), a predetermined time has elapsed since the calling operation was performed on the collective entrance machine 2. Whether or not a predetermined time has elapsed is determined (step S20). Note that the starting point of the predetermined time in this example may be a point in time when the calling operation is started, a point in time when the calling operation is completed, or a point in time several seconds after the calling operation is started. In addition, the predetermined time in this example is preferably shorter than the call time described later.

  If the predetermined time elapse determination (step S20) and the predetermined time has not been reached since the calling operation is performed on the collective entrance 2 (step S20: NO), the process proceeds to the display change operation determination (step S19). . Then, after the calling operation is performed on the collective entrance machine 2, the operation on the room operation unit 47 is invalidated within a predetermined time.

  When it is determined that a predetermined time has elapsed since the calling operation was performed on the collective entrance machine 2 (step S20: YES), the image was taken by the entrance camera 20 performed by the resident operating the room operation unit 47. A display change process for the entrance camera image is executed (step S21). That is, after a predetermined time has elapsed since the calling operation is performed on the collective entrance machine 2, the operation on the room operation unit 47 is validated. Simultaneously with the execution of the display change process (step S21), the video display on the entrance display unit 17 of the collective entrance 2 is stopped (step S22), and the process proceeds to step S23 described later.

  In addition, when the display change operation determination (step S19) indicates that the display change operation is not performed on the entrance camera image (step S19: NO), a predetermined time has elapsed since the calling operation is performed on the collective entrance machine 2. Whether or not a predetermined time has elapsed is determined (step S25).

  If the predetermined time elapse determination (step S25) does not reach the predetermined time since the calling operation is performed on the collective entrance 2 (step S25: NO), the process proceeds to the display change operation determination (step S19). . Then, after the calling operation is performed on the collective entrance machine 2, the operation on the room operation unit 47 is invalidated within a predetermined time.

  When it is determined that a predetermined time has elapsed since the calling operation is performed on the collective entrance machine 2 (step S25: YES), the video display on the entrance display unit 17 of the collective entrance machine 2 is stopped (step S26). ), The process proceeds to step S23 described later.

  After the call operation by the visitor ends (step S15), a call state transition determination as to whether or not the call state has been changed or a call time elapse determination as to whether or not the call time has elapsed is performed (step S23).

  Here, if it is determined that the resident has operated the room operation unit 47 and the call state with the visitor is permitted and the call state has been entered (step S23: YES), a call between the visitor and the resident is made. It is possible (step S24). When a resident invites a visitor after a call with the visitor, the resident presses the unlocking switch of the room operation unit 47 to unlock the entrance. This allows visitors to pass through the entrance of the dwelling unit. If it is determined that the calling time has not elapsed and the calling time has elapsed (step S23: YES), the collective entrance 2 and the room 4 are set in a standby state (step S24).

  If the call between the visitor and the resident is not permitted (step S23: NO) and it is further determined that the calling time has not elapsed (step S23: NO), the display change operation determination (step S19). Migrate to

  As described above, according to the intercom system 10 according to the present embodiment, when a visitor performs a call operation on the collective entrance 2, an image acquired by the entrance camera 20 is displayed on the entrance display unit 17. And the room display unit 46. For this reason, the visitor can confirm his / her video by looking at the entrance display unit 17, and the resident can confirm the visitor by looking at the room display unit 46. Further, when a visitor performs a call operation on the collective entrance 2, the operation on the room operating unit 47 of the room 4 is invalidated within a predetermined time. For this reason, even if the resident operates the room operation unit 47 within a predetermined time, the images displayed on the entrance display unit 17 and the room display unit 46 do not change, and the visitor is displayed on the entrance display unit 17. You can't tell if a resident is at home or not.

  In addition, after a predetermined time has elapsed after a visitor performs a call operation on the collective entrance 2, the video acquired by the front camera 20 is stopped from being displayed on the entrance display unit 17 after the predetermined time has elapsed. In addition, the operation on the living room operation unit 47 is validated. For this reason, a resident who has been called by a visitor operates the living room operation unit 47 after a predetermined time has elapsed, for example, to perform display change processing such as changing the center position or scale of the video. Even if the visitor is surely confirmed, the operated image is not displayed on the entrance display unit 17. Thus, since the visitor does not know how the video displayed on the room display unit 46 changes even when looking at the entrance display unit 17, the visitor notices whether the resident is at home. I can't. Therefore, the resident can confirm the visitor without noticing the visitor.

  It should be noted that the video of the entrance camera 20 displayed on the entrance display unit 17 and the room display unit 46 during a predetermined time after the calling operation is performed on the collective entrance machine 2 has at least one of the center or scale of the video. It is also possible to automatically change the pattern.

  In this way, an image in which the center position and scale are automatically changed in a predetermined pattern is displayed on the entrance display unit 17. At this time, even if the visitor sees the image displayed on the entrance display unit 17, it is not known whether the image automatically changes in a predetermined pattern due to the operation of the resident. I can't tell if is at home. On the other hand, since the visitor is aware that his / her video is captured in a plurality of patterns, the crime prevention performance is improved.

In addition, after the calling operation on the collective entrance machine 2 is completed, a recording display (for example, “recording” character display, An icon display with a graphic indicating that recording is in progress) may be displayed until the collective entrance 2 and the room 4 are in a standby state.
In this way, the visitor can be made aware that the video acquired by the entrance camera 20 is being recorded, thus improving the crime prevention.

  In the above embodiment, after a predetermined time has elapsed after a visitor performs a call operation on the collective entrance 2, an image acquired by the front camera 20 after the predetermined time has elapsed is displayed on the entrance display unit 17. However, after a predetermined time has elapsed, a still image recorded by the entrance camera 20 before the predetermined time may be displayed on the entrance display unit 17.

  Next, control by the control device 3 of the intercom system 10 according to another embodiment will be described with reference to the flowchart shown in FIG.

  When a visitor presses the button of the entrance operation unit 16 of the collective entrance 2 to call a resident in the dwelling unit, a call operation for the resident in the dwelling unit is started (step S31).

  Then, in the entrance hall 2, the entrance camera 20 is driven, and an image of a visitor waiting around the entrance hall 2 (for example, in front) is taken by the entrance camera 20 (step S <b> 32).

  Furthermore, in the collective entrance machine 2, the entrance display unit 17 is activated (step S33), and the entrance camera image captured by the entrance camera 20 is displayed on the entrance display unit 17 (step S34).

  When a visitor starts a call operation (step S31) and the visitor presses the call button on the entrance operation unit 16 to terminate the call operation (step S35), the entrance display unit 17 of the collective entrance 2 displays the call operation. Is stopped (Step S36), and the entrance display unit 17 of the collective entrance 2 displays a recording display (for example, “Recording”) indicating that the image acquired by the entrance camera 20 is being recorded. Character display and icon display with a graphic indicating that recording is in progress) are displayed until the collective entrance 2 and the room 4 are in a standby state (step S37).

  When the visitor presses the call button of the entrance operation unit 16 to terminate the call operation (step S35), a ringing tone is emitted from the room speaker 45 of the room unit 4 of the call target dwelling unit (step S38). ).

  Further, in the room unit 4, the room display unit 46 is activated (step S39), and the entrance camera image photographed by the entrance camera 20 is displayed on the room display unit 46 (step S40).

  In this state, when the resident operates the room operating unit 47 and the display change process is performed (step S41), the entrance camera image captured by the entrance camera 20 displayed on the room display unit 46 is displayed. The display change process is executed for (Step S42).

  After the call operation by the visitor is completed (step S35), a call state transition determination as to whether or not the call state has been changed or a call time passage determination as to whether or not the call time has elapsed is performed (step S43).

  Here, if it is determined that the resident has operated the room operation unit 47 and the call state with the visitor is permitted and the state is shifted to the call state transition (step S43: YES), the call between the visitor and the resident Is possible (step S44). When a resident invites a visitor after a call with the visitor, the resident presses the unlocking switch of the room operation unit 47 to unlock the entrance. This allows visitors to pass through the entrance of the dwelling unit. If it is determined that the calling time has not elapsed and the calling time has elapsed (step S43: YES), the collective entrance 2 and the room 4 are set in a standby state (step S44).

  If the call between the visitor and the resident is not permitted (step S43: NO) and it is further determined that the calling time has not elapsed (step S43: NO), the display change operation (step S41) is performed. Transition.

  As described above, according to the embodiment shown in FIG. 6, when a calling operation is started on the collective entrance machine 2, an image acquired by the entrance camera 20 is displayed on the entrance display unit 17. Therefore, the visitor can check his / her video by looking at the entrance display unit 17. Further, after the call operation is finished, the video acquired by the entrance camera 20 is displayed on the living room display unit 46, and the video acquired by the entrance camera 20 after the call operation is finished is displayed on the entrance display unit 17. Being stopped. For this reason, after the call operation by the visitor is completed, the resident, for example, for the purpose of crime prevention, operates the living room operation unit 47 to change the center position and scale of the video to surely check the visitor. Even so, the operated image is not displayed on the entrance display unit 17. Therefore, the visitor cannot recognize whether the resident is at home or not because he / she does not know how the video displayed on the living room display unit 46 changes even when he / she looks at the entrance display unit 17. Therefore, the resident can confirm the visitor without noticing the visitor.

  In addition, after the calling operation is finished, the entrance display unit 17 displays a recording display indicating that the video acquired by the entrance camera 20 is being recorded. This makes it possible to recognize that the video acquired in is being recorded, and the security is improved.

  In the above-described other embodiment, after the call operation by the visitor to the collective entrance machine 2 is finished, the video acquired by the entrance camera 20 is not displayed on the entrance display unit 17, but the call operation is finished. Thereafter, a still image recorded by the entrance camera 20 before the end of the calling operation may be displayed on the entrance display unit 17.

  In addition, this invention is not limited to embodiment mentioned above and other embodiment, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  In addition, the video displayed on the entrance display unit 17 and the room display unit 46 in the above embodiment and other embodiments is not limited to a moving image, and a continuous still image may be displayed.

  Moreover, the intercom system of the present invention can be used not only for each dwelling unit of an apartment house such as a condominium, but also for a building having an entrance such as a single dwelling unit. For example, the function of the collective entrance machine 2 can be given to the entrance machine of a detached house.

  Moreover, in the said embodiment and other embodiment, it was comprised so that the display change operation by the room operation part 47 could be reflected in the display content of the room display part 46 and the entrance display part 17, but in this example Not limited. For example, the display change operation by the room operation unit 47 may be reflected only in the display contents of the room display unit 46 regardless of whether or not the visitor performs a call operation.

2: Collective entrance machine (entrance machine), 4: Office room machine, 10: Intercom system, 17: Entrance display unit, 20: Entrance camera, 46: Office display unit, 47: Room operation unit (video operation unit)

Claims (6)

An intercom system comprising an entrance machine for calling and calling a resident, and a room machine installed in the room and responding to a call from the entrance machine,
The entrance machine is
An entrance camera for acquiring images around the entrance machine;
An entrance display unit for displaying the video;
Have
The room machine is
A room display unit for displaying the video;
A video operation unit for performing a display change process for changing the video acquired by the entrance camera and displayed on the room display unit;
Have
When a call operation is performed at the entrance machine, an image acquired by the entrance camera is displayed on the entrance display unit and the living room display unit, and an operation on the image operation unit is invalidated within a predetermined time. ,
After the predetermined time has elapsed since the calling operation was performed in the entrance machine, the video acquired by the entrance camera after the predetermined time has elapsed is stopped from being displayed on the entrance display unit, and the video An intercom system characterized in that an operation on an operation unit is effective.   The center position or the scale of the image displayed on the entrance display unit and the living room display unit within the predetermined time is automatically changed in a predetermined pattern. Intercom system.   3. When the call operation is performed, a recording display indicating that an image acquired by the entrance camera is being recorded is displayed on the entrance display unit. The intercom system described in. An intercom system comprising an entrance machine for calling and calling a resident, and a room machine installed in the room and responding to a call from the entrance machine,
The entrance machine is
An entrance camera for acquiring images around the entrance machine;
An entrance display unit for displaying the video;
Have
The room machine is
A room display unit for displaying the video;
A video operation unit for performing a display change process for changing the video acquired by the entrance camera and displayed on the room display unit;
Have
When a call operation is started in the entrance machine, an image acquired by the entrance camera is displayed on the entrance display unit, and after the call operation is finished, an image acquired by the entrance camera is An intercom system that is displayed on a living room display unit and that an image acquired by the entrance camera after the call operation is terminated is stopped from being displayed on the entrance display unit.   5. The intercom according to claim 4, wherein after the calling operation is finished, a recording display indicating that an image acquired by the entrance camera is being recorded is displayed on the entrance display unit. system. An intercom system comprising an entrance machine for calling and calling a resident, and a room machine installed in the room and responding to a call from the entrance machine,
The entrance machine is
An entrance camera for acquiring images around the entrance machine;
An entrance display unit for displaying the video;
Have
The room machine is
A room display unit for displaying the video;
Of the image acquired by the entrance camera and displayed on the entrance display unit and the image acquired by the entrance camera and displayed on the room display unit, only the image displayed on the room display unit is changed. A video operation unit for performing display change processing to be performed;
An intercom system characterized by comprising:

Images