JP2011120041A - Intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent illegal acquisition from a mobile terminal, on which a video signal captured by a camera of an entrance slave unit can be plotted, when storing the video signal in a WEB server of an IF-BOX. <P>SOLUTION: When a call from an entrance slave unit is reported by an internal master unit 2 and mobile terminals 3a, 3b and 3c, a video signal captured by a camera of the entrance slave unit is stored through the internal master unit into a WEB server 41 of an IF-BOX 4, and a control server 42, which controls the WEB server, compares addresses of the mobile terminals stored in a first storage circuit 42a beforehand with an address added to the video request signal transmitted from a mobile terminal, which is notified of the call, to the WEB server. Only to the mobile terminal in which the addresses match, the video signal read from the WEB server is transmitted, and plotted onto a terminal monitor. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an intercom system, and in particular, when storing a video signal picked up by a camera of an entrance cordless handset in an IF-BOX WEB server, the video signal is read by a request from a portable terminal and The present invention relates to an intercom system that can display images on a monitor.

  Conventionally, an automatic display device and an automatic display device that can access and view video data in the homepage sequentially via the Internet, etc. with little effort when creating contents without burdening the homepage provider's server A display control method is disclosed (for example, see Patent Document 1).

JP 11-296536 A

  According to the access means of Patent Document 1 described in the background art, although it can be displayed on the display unit by accessing a WWW server via a network and downloading a homepage related to video information to be viewed, there is no access restriction means. Not provided.

  Therefore, in the access means of Patent Document 1, the calling from the entrance unit is notified by the living room base unit and the portable terminal, and when applying the video signal captured by the entrance unit camera as video information, When the video signal is assigned to a predetermined URL address and stored in the IF-BOX WEB server, the SIP server provided in the IF-BOX and the above-described WEB for controlling the call from the entrance terminal to the portable terminal Since the server is usually provided separately, the WEB server cannot know which mobile terminal the SIP server is calling. Therefore, the WEB server is accessed from a terminal other than the mobile terminal for which the call notification is made. As a result, the video signal may be illegally acquired.

  The present invention has been made to solve this problem, and can store the video signal picked up by the camera of the entrance cordless handset in the IF-BOX WEB server. An object of the present invention is to provide an intercom system that prevents unauthorized acquisition from a portable terminal.

  In order to achieve the above-described object, an interphone system according to a first aspect of the present invention is configured to capture an image by an entrance cordless handset having a camera and a call in response to a call from the entrance cordless handset. Data performed between the living room parent device and the portable terminal, which has a parent device monitor for displaying video signals, a portable terminal for establishing a call in response to a call from the entrance child device, and In an interphone system having an IF-BOX for controlling communication, the IF-BOX receives a SIP server for controlling a call from the entrance terminal to the mobile terminal and a video signal transmitted from the entrance terminal. A WEB server for saving and a control server for controlling the SIP server and the WEB server are provided. When the mobile terminal detects a call from the entrance cordless handset, the mobile terminal transmits an address transmission means for transmitting the address assigned to the mobile terminal to the IF-BOX and a video signal stored in the IF-BOX WEB server. And a video requesting means for generating a video request signal for reading and displaying on the terminal monitor of the portable terminal. The IF-BOX control server includes a first storage means for storing the address of the mobile terminal in advance, an address added to the video request signal transmitted from the mobile terminal to the WEB server, and the first storage means. It has a video transmission means for transmitting the video signal read from the WEB server only to the portable terminal assigned to the address where the stored addresses are compared and the coincidence is detected.

  In the intercom system according to the second aspect of the present invention, in the first aspect of the present invention, the video request signal from the video request unit of the portable terminal to the IF-BOX WEB server is transmitted at a regular timing. It is what is done.

  In the intercom system according to the third aspect of the present invention, in the first aspect or the second aspect of the present invention, the IF-BOX control server transmits the video request signal transmitted from the portable terminal to the WEB server. A second storage means for storing the address added to the first timepiece, a first timekeeping means for starting a time measurement for a fixed time starting from when the address is stored in the second storage means, and a portable terminal The first monitor for erasing the address stored in the second storage means when the end-of-call operation by the portable terminal or the time-up by the first time measuring means is detected when the video signal is displayed on the terminal monitor Erasing means.

  In the intercom system according to the fourth aspect of the present invention, in the first aspect or the second aspect of the present invention, the IF-BOX control server transmits the video request signal transmitted from the portable terminal to the WEB server. A second storage means for storing the address added to the second storage means, a second time measurement means for starting time measurement for a fixed time starting from the time when the address is stored in the second storage means, Having a second erasing means for erasing the address stored in the second storage means when the video request signal from the portable terminal is not received by the WEB server before the time-up by the time counting means It is.

  According to the intercom system of the present invention, when the call from the entrance slave unit is notified by the room master unit and the mobile terminal, the video signal captured by the camera of the entrance unit is IF The control server stored in the BOX WEB server and controlling the WEB server is transmitted to the WEB server from the portable terminal address and the call notification that are stored in advance in the first storage means. The video signal read from the WEB server can be transmitted only to the mobile terminal whose address matches the address added to the incoming video request signal, and can be displayed on the terminal monitor. Thereby, the illegal acquisition of the video signal by the terminal other than the predetermined mobile terminal set in advance can be prevented.

  Also, according to the intercom system of the present invention, since the request timing of the video signal that is read from the IF-BOX WEB server and displayed on the mobile terminal is a periodic timing, for example, video based on the individual difference of the mobile terminal Even when the processing capabilities are different, the video signal can be output to the terminal monitor without imposing a load on the portable terminal.

  In addition, according to the intercom system of the present invention, it is possible to prevent transmission of a video signal to a mobile terminal whose video request has expired due to a call termination operation, a call time up, or the like.

  Furthermore, according to the intercom system of the present invention, it is possible to prevent transmission of a video signal to a portable terminal whose data communication has been interrupted for some reason during a call or a call.

FIG. 1 is a system explanatory diagram showing an overall configuration of an intercom system according to an embodiment of the present invention. 2A and 2B are block diagrams showing specific configurations of the portable terminal and the IF-BOX, respectively, in the intercom system according to the embodiment of the present invention. FIG. 3 is a communication sequence diagram for explaining a specific operation in the intercom system according to the embodiment of the present invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments to which an intercom system of the invention is applied will be described with reference to the drawings.

  FIG. 1 is a system explanatory diagram showing an overall configuration of an intercom system according to an embodiment of the present invention. This intercom system notifies the call from the entrance cordless handset 1 installed outside the dwelling unit, such as the entrance of the dwelling unit, and the entrance cordless handset 1 installed inside the dwelling unit and connected via the cordless handset / master unit line L1. And a mobile terminal 3a, 3b, 3c for establishing a call in response to a call from the front door 1 and a parent unit / BOX. Connected to the room master unit 2 via the line L2, and via the BOX / router line L3 and the IF-BOX 4 for controlling data communication performed between the room master unit 2 and the portable terminals 3a, 3b, 3c The router 5 is connected to the IF-BOX 4 and performs wireless or wired data communication between the portable terminals 3a, 3b, 3c and the IF-BOX 4. The router 5 can be connected to a PC terminal 6 or the Internet 7 installed in the dwelling unit.

  Further, the entrance slave unit 1 includes a slave unit operation unit 10, a camera 11, a slave unit microphone 12, and a slave unit speaker 13.

  In this entrance cordless handset 1, the handset operating unit 10 is a visitor who is outside the dwelling unit in order to call a resident in the dwelling unit that is a user of the living room master unit 2 or the mobile terminals 3 a, 3 b, 3 c. Performs a predetermined call operation, and is constituted by a call button, for example. The camera 11 is for imaging a video signal of a visitor who has performed a call operation and a video signal in the vicinity of the entrance of the dwelling unit, and is composed of various video imaging media such as a CCD and a CMOS, for example. ing. The handset microphone 12 and handset speaker 13 are used for inputting / outputting voice (transmitted voice / received voice) signals when a visitor establishes a call with the resident.

  The living room master unit 2 includes a master unit operation unit 20, a master unit monitor 21, a master unit microphone 22, and a master unit speaker 23.

  In this living room main unit 2, the main unit operation unit 20 responds to a call from the entrance cordless handset 1 by a visitor, and a resident in the room performs a predetermined response operation in the dwelling unit. A predetermined call end operation for ending a call is performed, and is constituted by, for example, a call button. The master monitor 21 is for outputting a video signal picked up by the camera 11 of the front door 1 and is, for example, a variety of video output media such as an LCD or an organic EL display. The parent device monitor 21 can also be configured to display a text message for notifying a call from the entrance child device 1 by a visitor. Further, the base unit microphone 22 and the base unit speaker 23 are used for inputting and outputting voice (transmitted voice and received voice) signals when the resident establishes a call with the visitor. The main unit speaker 23 can also output a ringing tone or a voice message for notifying a call from the entrance terminal 1 by a visitor.

  Furthermore, the portable terminals 3a, 3b, and 3c are each carried by a resident who is in the room with the same configuration, and are assigned individual addresses (consent with the IP address). , A terminal operation unit 30, a terminal monitor 31, a terminal microphone 32, and a terminal speaker 33 are provided.

  In the portable terminals 3a, 3b, and 3c, the terminal operation unit 20 is in progress while the resident carrying the portable terminal performs a predetermined response operation in response to a call from the entrance cordless handset 1 by a visitor. Is performed by a predetermined call end operation for ending the call, and is constituted by a call button or a numeric keypad, for example. Further, the terminal monitor 31 is for outputting a video signal that is captured by the camera 11 of the front door 1 and stored in the WEB server 41 (described later) of the IF-BOX 4. The terminal monitor 31 can be displayed with a text message for notifying the call from the entrance cordless handset 1 by a visitor. Further, the terminal microphone 32 and the terminal speaker 33 are used for inputting and outputting voice (transmitted voice and received voice) signals when a resident carrying the portable terminal establishes a call with a visitor. And this terminal speaker 33 can also output the ringing sound and voice message for alerting | reporting the call from the entrance cordless handset 1 by a visitor.

  Next, a specific configuration of the mobile terminals 3a, 3b, and 3c will be described with reference to the block diagram of FIG. The portable terminals 3a, 3b, and 3c include the terminal operation unit 30, the terminal monitor 31, the terminal microphone 32, and the terminal speaker 33, the terminal video processing unit 34, the terminal audio processing unit 35, the terminal control unit 36, And a terminal interface (hereinafter referred to as “I / F” for a similar interface) 37.

  Here, the terminal video processing unit 34 performs predetermined signal processing on the video signal read from the WEB server 41 (described later) of the IF-BOX 4 and transmitted via the router 5, and displays the image on the terminal monitor 31. It is for making it happen. The terminal voice processing unit 35 is for performing predetermined signal processing on voice (transmitted voice, received voice) signals input / output by the terminal microphone 32 and the terminal speaker 33. The terminal control unit 36 is for controlling each component of the mobile terminal. Specifically, when a call from the front door 1 is detected, the address assigned to the mobile terminal is An address transmission circuit 36a for transmitting to the IF-BOX 4 via the router 5 and a video signal stored in the WEB server 41 (to be described later) of the IF-BOX 4 are read periodically, for example, at a timing of every second, A video request circuit 36b that generates a video request signal for causing the terminal monitor 31 of the portable terminal to display an image is provided. Further, the terminal I / F 37 includes a signal transmission path from the router 5 to the terminal video processing section 34, a signal transmission path between the router 5 and the terminal audio processing section 35, and a signal between the router 5 and the terminal control section 36. And a transmission line.

  Next, a specific configuration of the IF-BOX 4 will be described with reference to the block diagram of FIG. The IF-BOX 4 stores a SIP server 40 for controlling a call from the entrance terminal 1 to the portable terminal 3 and a video signal transmitted from the entrance terminal 1 via the room base unit 2. A WEB server 41, a control server 42 for controlling the SIP server 40 and the WEB server 41, a parent-side BOX I / F 43, and a router-side BOX I / F 44.

  Here, the control server 42 includes a first storage circuit 42a for storing addresses of the mobile terminals 3a, 3b, and 3c in advance, and a mobile server 3a, 3b, and 3c to the WEB server 41 via the router 5. A second storage circuit 42b for storing an address added to the transmitted video request signal, and a video request signal transmitted from the mobile terminals 3a, 3b, 3c to the WEB server 41 via the router 5 The video transmission for transmitting the video signal read from the WEB server 41 only to the portable terminal assigned to the address detected as a match by comparing the address added to the address stored in the first storage circuit 42a. First and second timings for starting time counting for a certain time, which will be described later, starting from when the above-mentioned address is stored in the circuit 42c and the second storage circuit 42b. When a video signal is output on the terminal monitors 31 of the time-counting circuits 42d and 42e and the mobile terminals 3a, 3b, 3c,..., The call-ending operation by the terminal operation unit 30 of the mobile terminal or the first time-counting circuit When the time-up by 42d is detected, the first erasure circuit 42f for erasing the address stored in the second memory circuit 42b, and the portable terminals 3a, 3b, A second erasure circuit 42g for erasing the address stored in the second storage circuit 42b when the video request signal from 3c is not received by the WEB server 41; Each of the first and second storage circuits 42a and 42b is composed of, for example, a RAM or an EEPROM.

  The master unit side I / F 43 is for forming a data transmission path between the master unit / BOX line L2 and the control server 42. Further, the router side I / F 44 is for forming a signal transmission path between the BOX / router line L3, the WEB server 41, and the control server 42.

  In the intercom system according to the embodiment of the present invention configured as described above, a specific operation will be described below with reference to the communication sequence diagram of FIG. In this embodiment, it is assumed that the first storage circuit 42a of the IF-BOX 4 stores in advance the addresses of the mobile terminals 3a and 3b among the mobile terminals 3a, 3b and 3c. It is assumed that the addresses of 3c and the PC terminal 6 are not stored.

  In FIG. 1, when a visitor outside the dwelling unit performs a predetermined calling operation using the slave unit operation unit 10 of the entrance slave unit 1, the call is made to the living room master unit 2 via the slave unit / master unit line L1. A signal is transmitted. Upon receiving this call signal, the room master unit 2 detects that a visitor has called from the entrance slave unit 1, and outputs a ringing sound or voice message to that effect from the master unit speaker 23. The imaging of the video signal by the camera 11 of the machine 1 can be started, and this video signal can be displayed on the master monitor 21. The master monitor 21 has a call from the entrance slave unit 1 by the visitor. A text message to that effect can also be displayed. The living room master unit 2 controls the call signal and video signal from the entrance slave unit 1 via the master unit / BOX line L2, the master unit side BOX I / F 43 of the IF-BOX 4 shown in FIG. Send to server 42.

  Here, the control server 42 of the IF-BOX 4 converts the call signal out of the call signal and the video signal transmitted from the front door unit 1 via the room base unit 2 into the SIP call signal by the SIP server 40. Signal processing and adding an address stored in advance in the first memory circuit 42a, then the router side BOX I / F 44, the BOX / router line L3, the router 5, the portable terminal 3a shown in FIG. 3b, 3c,... Are transmitted to the terminal control unit 36 via the terminal I / F 37, and the video signal is assigned to a predetermined URL address and periodically transmitted to the WEB server 41, for example, 1 second. Save every time. Thereby, the web server 41 can store, for example, video signals captured by the camera 11 of the entrance cordless handset 1 as continuous video signals without frame dropping for each frame.

  When the terminal control unit 36 of the portable terminals 3a, 3b, and 3c receives the SIP call signal transmitted from the IF-BOX 4 via the router 5, the terminal controller 36 preliminarily sends the address added to the SIP call signal and its own terminal. Compared with the assigned address, only when the address matches, it is detected that there is a call from the entrance cordless handset 1 by the visitor, and a ringing sound or voice message to that effect is output from the terminal speaker 33 At the same time, a text message indicating the same can be displayed on the terminal monitor 31. Furthermore, the address transmission circuit 36 generates an address (hereinafter referred to as an address data signal) assigned to the portable terminal. . This address data signal is transmitted to the control server 42 of the IF-BOX 4 via a signal transmission path opposite to the SIP call signal described above.

  That is, in this embodiment, among the terminal control units 36 of the mobile terminals 3a, 3b, and 3c, only the terminal control unit 36 of the mobile terminals 3a and 3b has the same address, and the call notification operation described above is performed. The address data signal transmission operation from the address transmission circuit 36a is performed.

  In addition, each of the terminal control units 36 of the mobile terminals 3a and 3b on which the call notification operation as described above is performed receives the video signal stored in the WEB server 41 of the IF-BOX 4 (at a regular timing). The SIP image request signal for reading out and displaying on the terminal monitor 31 is generated by the image request circuit 36b at a regular timing, for example, every 1 second. This SIP video request signal has an address assigned to its own portable terminal added, and the WEB via the terminal I / F 37, the router 5, the BOX / router line L3, and the router side BOX I / F 44 of the IF-BOX4. It is transmitted to the server 41.

  Next, when the WEB server 41 of the IF-BOX 4 receives the SIP video request signal transmitted from the mobile terminals 3a and 3b via the router 5 (at a regular timing), it is added to the SIP video request signal. The stored address data is stored in the second storage circuit 42b of the control server 42, and the control server 42 counts a predetermined time, for example, 3 minutes, starting from the storage timing in the second storage circuit 42b. The first timer circuit 42d starts the operation. Similarly, the WEB server 41 controls to compare the address data added to the SIP video request signal transmitted from the mobile terminals 3a and 3b with the address stored in advance in the first storage circuit 42a. The server 42 is controlled, and the control server 42 can read the video signal stored in the WEB server 41 only when the addresses match.

  That is, the control is performed only when the SIP video request signal from the portable terminal notified of the call from the front door 1 is received by the WEB server 41 of the IF-BOX 4 as in the portable terminals 3a and 3b described above. The server 42 performs signal processing for reading the video signal stored in the WEB server 41 and converting it into a JPEG video signal. This video signal is transmitted to the terminal video processing unit 34 via the router side BOX I / F 44, the BOX / router line L3, the router 5, and the terminal I / F 37 of the portable terminals 3a and 3b.

  The video processing unit 34 of the mobile terminals 3a and 3b processes the JPEG video signal transmitted from the IF-BOX 4 via the router 5 into a format for image output, so that the camera of the entrance terminal 1 11 can output the video signal picked up at the terminal monitor 31. In addition, since the transmission timing of the above-mentioned SIP video request signal is a regular timing, for example, every 1 second, the video processing is based on the individual difference between the mobile terminals 3a, 3b, and 3c. Even when the video processing capabilities of the unit 34 are different, it is possible to output a video signal to the terminal monitor 31 without imposing a load on the portable terminal.

  On the other hand, a video request signal from the mobile terminal 3c or the PC terminal 6 (see FIG. 1) having an address not stored in advance in the first storage circuit 42a constituting the control server 42 of the IF-BOX 4 passes through the router 5. If the address is not transmitted, the control server 42 that has detected the address does not read out the video signal from the WEB server 41, generates an error display screen data signal, and the router 5. Is transmitted to the portable terminal 3c and the PC terminal 6 via. Thereby, since the video signal imaged by the camera 11 of the front door 1 is not displayed on the terminal monitor 31 of the portable terminal 3c or the monitor of the PC terminal 6, only the error screen is displayed. It is possible to prevent illegal acquisition of a video signal by a terminal other than a predetermined mobile terminal set in advance. Specifically, illegal acquisition of video signals due to virus infection via the PC terminal 6 can be prevented.

  Next, the call notification that there is a call from the front cordless handset 1 as described above is performed together with the image signal picked up by the camera 11 on the master monitor 21 and the terminal monitor 31. For example, when a resident in a residence unit performs a predetermined response operation using the terminal operation unit 30 of the portable terminal 3a among the living room base unit 2 and the portable terminals 3a and 3b, the operation is detected. The terminal control unit 36 generates a SIP response signal and transmits the SIP response signal to the control server 42 of the IF-BOX 4 via a signal transmission path similar to the SIP call signal described above.

  The control server 42 of the IF-BOX 4 converts the SIP response signal transmitted from the mobile terminal 3a via the router 5 into the other terminal response request signal for intercom, and uses a signal transmission path opposite to the call signal described above. It transmits to the living room master unit 2 and the entrance slave unit 1 via.

  Here, when the front handset 1 receives the other terminal response request signal transmitted from the IF-BOX 4 via the room base 2, the handset microphone 12 and the handset speaker 13 used by the visitor A signal transmission path can be formed between the slave unit / base unit line L1. On the other hand, when detecting the other terminal response request signal from the IF-BOX 4, the living room base unit 2 does not use the base unit microphone 22 and the base unit speaker 23, but the handset / base unit line L1 and the base unit / BOX line L2. The other terminal response request acceptance signal is generated, and the other terminal response request signal is transmitted to the control server 42 of the IF-BOX 4 via the reverse signal transmission path.

  The control server 42 of the IF-BOX 4 performs signal processing for converting the terminal response request acceptance signal from the living room master unit 2 into the SIP terminal response request acceptance signal at the SIP server 40. This SIP terminal response request acceptance signal passes through the same signal transmission path as the SIP call signal described above after an address for designating the portable terminal 3a (read out from the second storage circuit 42b) is added. Then, it is transmitted to the terminal control unit 36 of the mobile terminals 3a, 3b, 3c.

  When the terminal control unit 36 of the portable terminals 3a, 3b, 3c receives the SIP terminal response request acceptance signal transmitted from the IF-BOX 4 via the router 5, it is added to the SIP terminal response request acceptance signal. By comparing the address and the address assigned to the terminal in advance and controlling the terminal voice processing unit 35 only when the address matches, the terminal microphone 32 and the terminal speaker 33 used by the resident A signal transmission path is formed between the terminal I / F 37 and the terminal voice processing unit.

  That is, in this embodiment, from the handset microphone 12 of the entrance handset 1 to the handset / base unit line L1, the room base unit 2, the base unit / BOX line L2, the IF-BOX4 base unit side BOX I / F 43, control A signal transmission path to the terminal speaker 33 via the server 42, the router side BOX I / F 44, the BOX / router line L3, the router 5, the terminal I / F 37 of the portable terminal 3a, the terminal voice processing unit 35, and the portable terminal 3a From terminal microphone 32 to terminal voice processing unit 35, terminal I / F 37, router 5, BOX / router line L3, router side BOX I / F 44 of IF-BOX 4, control server 42, base unit side BOX I / F 43, base unit / BOX line A signal transmission path is formed through L2, the living room master unit 2, and the slave unit / main unit line L1 to the slave unit speaker 13 of the entrance unit 1. Call is established by transmitting and receiving voice (transmitted voice, the received voice) signals and. Note that a voice (transmitted voice, received voice) signal transmitted and received between the IF-BOX 4 and the mobile terminal 3 a via the router 5 is a SIP signal converted by the SIP server 40 or the terminal control unit 36. Signal format.

  Next, when the above-described call is established (during a call), for example, when a resident in a room performs a predetermined call end operation using the terminal operation unit 30 of the mobile terminal 3a, this operation is performed. The terminal control unit 36 that has detected the signal generates a SIP end signal and transmits it to the control server 42 of the IF-BOX 4 via the same signal transmission path as the SIP response signal described above. By controlling, the signal transmission path between the terminal microphone 32 and the terminal speaker 33 used by the resident and the terminal I / F 37 via the terminal voice processing unit is blocked.

  The control server 42 of the IF-BOX 4 converts the SIP end signal transmitted from the mobile terminal 3a via the router 5 into the other terminal end signal for intercom, and is similar to the above-mentioned other terminal response request signal. It transmits to the living room main unit 2 and the entrance unit 1 via the signal transmission path.

  Here, when the front handset 1 receives the other terminal end signal transmitted from the IF-BOX 4 via the room base 2, the handset microphone 12 and the handset speaker 13 used by the visitor The signal transmission path between the slave unit / master unit line L1 can be cut off. On the other hand, when the room master unit 2 receives the other terminal end signal transmitted from the IF-BOX 4 via the room base unit 2, it is between the slave unit / base unit line L1 and the master unit / BOX line L2. The signal transmission path can be cut off, so that the call between the visitor and the resident carrying the mobile terminal 3a is terminated.

  Next, in the portable terminal 3a in which the call notification that there is a call from the front door unit 1 as described above is performed together with the output of the video signal captured by the camera 11 to the terminal monitor 31. When the terminal operation unit 30 is used, a predetermined call end operation is performed, and the IF-BOX4 control server 42 or the first time-counting circuit 42d that has received the above SIP call end signal, for example, increases the time by 3 minutes. The control server 42 that has detected this can control the first erasure circuit 42f and erase the address stored in the second storage circuit 42b. Thereby, it is possible to prevent the transmission of the video signal to the mobile terminal 3a that has passed the video request due to the end-of-call operation or the call time up.

  Further, the control server 42 of the IF-BOX 4 receives a video request signal transmitted from the mobile terminal 3a via the router 5 before the detection of a time-up of, for example, 10 seconds by the second timing circuit 42b. When not received at 42, the second erase circuit 42g can be controlled to erase the address stored in the second storage circuit 42b. As a result, it is possible to prevent transmission of a video signal to the mobile terminal 3a in which data communication is interrupted for some reason during a call or a call.

  The intercom system of the present invention has been described with a specific embodiment. However, the present invention is not limited to this embodiment, and any interphone system having any known configuration can be used as long as the effect of the present invention is achieved. It goes without saying that can also be adopted.

  Specifically, according to the embodiment of the present invention, as the configuration of the IF-BOX 4, the first and second storage circuits 42a and 42b and the first and second timing circuits 42d are arranged in the circuit of the control server 42. Although the aspect provided for is described, it is not limited to this aspect. For example, the IF-BOX 4 can be provided independently of the control server 42.

DESCRIPTION OF SYMBOLS 1 ... Entrance cordless handset 11 ... Camera 2 ... Living room master device 3a, 3b, 3c ... Portable terminal 31 ... Terminal monitor 36a ... Address transmission circuit (address transmission means)
36b …… Video request circuit (video request means)
4 ... IF-BOX
40... SIP server 41... WEB server 42... Control server 42 a... First storage circuit (first storage means)
42b... Second storage circuit (second storage means)
42c: Video transmission circuit (video transmission means)
42d... First clock circuit (first clock means)
42e ....... second timing circuit (second timing means)
42f... First erase circuit (first erase means)
42g... Second erasing circuit (second erasing means)

Claims (4)

An entrance slave (1) having a camera (11) and a master monitor (21) for establishing a call in response to a call from the entrance slave and displaying a video signal captured by the camera Between the portable terminal (3a, 3b, 3c) for establishing a call in response to a call from the entrance child machine, and the portable parent terminal and the portable terminal. In an intercom system having an IF-BOX (4) for controlling data communication to be performed,
The IF-BOX includes a SIP server (40) for controlling a call from the entrance device to the portable terminal, and a WEB server (41) for storing a video signal transmitted from the entrance device. And a control server (42) for controlling the SIP server and the WEB server,
When the mobile terminal detects a call from the entrance cordless handset, an address transmission means (36a) for transmitting an address assigned to the mobile terminal to the IF-BOX, and a web server of the IF-BOX A video requesting means (36b) for reading a video signal stored in the mobile terminal and generating a video request signal for causing the terminal monitor (31) of the portable terminal to display an image,
The IF-BOX control server is attached to the first storage means (42a) for storing the address of the portable terminal in advance and the video request signal transmitted from the portable terminal to the WEB server. A video transmission means (42c) for comparing the address and the address stored in the first storage means, and transmitting the video signal read from the WEB server only to the mobile terminal assigned to the address where the match is detected; An intercom system characterized by comprising:   The intercom system according to claim 1, wherein a video request signal from the video request means of the portable terminal to the IF-BOX WEB server is transmitted at a regular timing.   The IF-BOX control server includes a second storage means (42b) for storing an address added to the video request signal transmitted from the portable terminal to the WEB server, and a second storage means. A first time measuring means (42d) for starting time counting for a predetermined time starting from the time when the address is stored; and a terminal by the portable terminal when the video signal is output on the terminal monitor of the portable terminal. And a first erasure means (42f) for erasing an address stored in the second storage means when a time-up by a speech operation or the first time measurement means is detected. The intercom system according to claim 1 or 2.   The IF-BOX control server includes a second storage means (42b) for storing an address added to the video request signal transmitted from the portable terminal to the WEB server, and the second storage means. A second time measuring means (42e) for starting time counting for a predetermined time starting from the time when the address is stored, and a video request signal from the portable terminal before time-up by the second time measuring means. 3. A second erasure unit (42g) for erasing an address stored in the second storage unit when not received by the WEB server. The listed intercom system.

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