JP2005260359A - Monitoring/speech system for multiple dwelling house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring/speech system for multiple dwelling house wherein the number of pair wires in use can be reduced in the case of new installation and the existing pair wires can be utilized as they are in the case of renewal. <P>SOLUTION: In a lobby intercom unit 3, a transmission/reception circuit 10 transmits a digital video signal and a digital audio signal subjected to frequency multiplexing to a house information panel 1 through pair wires L1, and the transmission/reception circuit 10 receives the digital audio signal subjected to frequency multiplexing transmitted from the house panel 1 via the pair wires L1. Further, the transmission/reception circuit 10 receives a time division multiplex transmission signal transmitted from a terminal unit 20 via pair wires L2 to capture control data included in the transmission signal, and returns operation data or the like of an operation section 18 as monitor data for a return period. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apartment monitoring / call system.

Conventionally, in an apartment house, visitors and residents or management while monitoring the video of a visitor photographed by a camera of a lobby intercom device on a monitoring device provided on a housing information panel in a dwelling unit or an alarm monitoring panel in a manager's room There has been provided a residential monitoring / calling system capable of talking with people (for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-89391 (see FIG. 1)

  By the way, in the above-described conventional system, the video signal line, the call signal line, and the control signal line for controlling the connection of the video signal line and the call signal line are separately wired. For this reason, a three-pair wire is usually used.

  For this reason, when a new system is constructed, the number of wirings is large and the construction cost is high, and when a plurality of lobby intercom devices are installed, it is further composed of one pair for calls and one pair for video. The paired wires had to be wired, and the cost was high.

  On the other hand, when an existing system is renewed, it is required that the existing wiring can be used as it is, and therefore there has been a demand for providing a system that satisfies both.

  Also, when transmitting analog audio signals in apartment buildings, if the transmission line becomes long, the effect of inductive noise on the commercial power supply frequency must be taken into account, so it was necessary to use a large insulated transformer for the power supply section. .

  The present invention has been made in view of the above points, and the purpose of the present invention is to reduce the number of pair wires used in the case of new construction, and in the case of renewal, the existing one. The object is to provide a monitoring and calling system for collective housing that can use the paired wires as they are.

  According to the first aspect of the present invention, at least the lobby intercom device and an audio signal during an intercom call between the residential intercom device provided in the dwelling unit, and a camera for shooting a visitor of the lobby intercom device are used to capture the image. The video signal of the video displayed on the monitor device of the intercom device for a video is converted into a digital signal and transmitted onto the first pair line, and a monitoring control signal including call control is transmitted via the second pair line. Transmission is performed between the lobby intercom device and the residential intercom device.

  According to the first aspect of the present invention, since the video signal and the audio signal are transmitted on the first pair line and the monitoring control signal is transmitted through the second pair line, the respective signals are transmitted in a narrow band. Therefore, the pair wire used in the conventional intercom system can be used as the first pair wire and the second pair wire, so that the wiring cost is low at the time of new construction, and the existing When the system is renewed, two of the three-pair wires that have been used so far can be used as they are, the renewal cost is reduced, and the video signal is transmitted as a digital signal. It is possible to connect to a pair of wires without a branching device.

  According to a second aspect of the present invention, in the first aspect of the present invention, means for transmitting and receiving voice during an interphone call as an analog voice signal is added to the lobby intercom apparatus along with the digital signal via the first pair line. It is characterized by that.

  According to the second aspect of the present invention, it is possible to secure a call channel using an analog voice signal on the first pair line, and to ensure compatibility with a conventional call method using an analog voice signal.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the residential intercom apparatus switches the first pair lines from a plurality of lobby intercom apparatuses in response to a call from the lobby intercom apparatus. A means for connecting is provided.

  According to the third aspect of the present invention, since it is possible to secure two channels of physical transmission paths for digital audio signals and digital video signals, it is possible to correspond to an apartment house provided with a plurality of lobby intercom devices. .

  According to a fourth aspect of the present invention, in the first aspect of the present invention, a digital audio signal provided on the lobby intercom apparatus side for digitally modulating a digital audio signal to be transmitted and a video signal of a visitor photographing camera are digitally modulated. And a means for demodulating the received digital audio signal and a means for demodulating the digital video signal are constituted by a single demodulating means. It is characterized by that.

  According to invention of Claim 4, the structure of a lobby intercom apparatus or a house intercom apparatus can be simplified.

  In the present invention, since the video signal and the audio signal are transmitted on the first pair line, and the monitoring control signal is transmitted through the second pair line, each signal can be transmitted in a narrow band, For this reason, the pair wires used in the conventional intercom system can be used as the first pair wires and the second pair wires, so that the wiring cost is low at the time of new construction, and when the existing system is renewed. The two pairs of the three-pair wires used so far can be used as they are, the renewal cost is reduced, and the video signal is transmitted as a digital signal so that each home intercom device and the first pair wire are connected. There is an effect that the connection can be made without a branching device.

Embodiments of the present invention will be described below.
(Embodiment 1)
FIG. 2 shows the configuration of a collective housing call / monitoring system according to the present embodiment, which is a housing information panel 1 having a function of a house intercom device provided in each dwelling unit as a terminal of the system. As a common facility, an alarm monitoring panel 2 provided in the manager's room and a lobby intercom device 3 provided in Roby, which is a common part, are installed, and these terminals are two-pair lines constituting a transmission line in the apartment house. 4, one pair line of the two pair lines 4 constitutes a digital video signal and digital audio signal transmission path, and the other pair line constitutes a control data transmission path.

  As shown in FIG. 1A, the lobby intercom apparatus 3 includes, as video / audio circuit elements, a shooting camera 5 for shooting a visitor, a microphone 6 serving as an interphone transmitting means, and a speaker 7 serving as a receiving means. The analog audio signal amplification amplifiers 8 and 9 are connected to the pair line L1 to transmit a digital audio signal and a digital video signal, which will be described later, and digital signals sent from the housing information board 1 and the alarm monitoring board 2 A transmission / reception circuit 10 that receives an audio signal, a video digital modulation circuit 11 that digitally modulates a video signal from the photographing camera 5 by an appropriate method, and an analog audio signal that is input from the microphone 6 via an amplifier 8 are converted into a digital audio signal. A codec function that converts the received and demodulated digital audio signal into an analog audio signal and outputs the analog audio signal to the amplifier 9 An audio processing circuit 12; and a digital audio signal modulation / demodulation circuit 13 that digitally modulates and outputs a digital audio signal output from the audio processing circuit 12 using an appropriate modulation method, and receives and demodulates the received digital audio signal; The audio digital signal modulated by the audio digital modulation / demodulation circuit 13 and the digital video signal modulated by the video digital modulation circuit 11 are frequency-multiplexed in frequency bands assigned to them, and are sent from the transmission / reception circuit 10 to the pair line L1. A multiplexing / demultiplexing circuit 14 that separates the digital audio signal received by the transmission / reception circuit 10 and outputs it to the audio digital modulation / demodulation circuit 13 is provided as an audio / video circuit element.

  In addition, a transmission time slot for receiving a transmission signal from a transmission unit 15 connected to the pair line L2 and provided in an alarm monitoring panel 2 (see FIG. 3), which will be described later, is set in the transmission signal (hereinafter referred to as a reply period). When the transmission signal transmission / reception circuit 16 for transmitting the monitoring data to the transmission unit 15 and the address indicated by the address data included in the transmission signal received by the transmission signal transmission / reception circuit 16 match the preset unique address. The control data included in the transmission signal is taken in to control the circuit elements and drive control of the display unit 17 and to return the operation data of the operation unit 18 as monitoring data in the transmission signal return period. A terminal unit 2 comprising a signal processing unit 19 that performs processing and controls the circuit elements in accordance with operation data of the operation unit 18 It is equipped with a.

  Furthermore, a power supply unit 21 comprising a switching power supply for converting the commercial power supply AC100V into a predetermined DC voltage is provided as an operating power supply unit for audio / video system circuit elements and terminal unit 20 circuit elements.

  On the other hand, as shown in FIG. 1B, the housing information board 1 is connected to the microphone 22 and the speaker 23 as the receiving means, the amplifiers 24 and 25 for amplifying the analog audio signal, and the pair line L1. Analog audio input from a microphone 22 via an amplifier 24 and a transmission / reception circuit 26 that is connected and transmits a digital audio signal, which will be described later, and receives a digital audio signal transmitted from the lobby intercom device 3 and the alarm monitoring panel 2. A signal is output as a digital audio signal with the lobby intercom device 3, and a digital audio signal demodulated after being received is converted into an analog audio signal, and this analog audio signal is output to the amplifier 25. A voice having a voice synthesizing function for generating a voice signal for a ringing tone and outputting it to the amplifier 25 And a digital audio signal modulation / demodulation circuit that digitally modulates and outputs the digital audio signal output from the audio processing circuit 27 by the same modulation method as that of the lobby intercom device 3 and that takes in and demodulates the received digital audio signal. 28, and the digital audio signal modulated by the audio digital modulation / demodulation circuit 28 is multiplexed and transmitted / received on the digital video signal and digital audio signal transmitted from the lobby intercom device 3 in the frequency band assigned for upstream use. A demultiplexing circuit 29 for separating the digital video signal received by the transmission / reception circuit 26, a video digital demodulating circuit 30 for demodulating the digital video signal separated by the demultiplexing circuit 29 into a video signal, A monitor that displays the image by inputting the demodulated video signal A location 31 includes a circuit element of the audio and video systems.

  Similarly to the lobby intercom apparatus 3, the transmission unit 15 is connected to the pair line L2 and receives a transmission signal from a transmission unit 15 provided in an alarm monitoring panel 2 to be described later, and transmits monitoring data in a reply period set in the transmission signal. Included in the transmission signal when the transmission signal transmission / reception circuit 32 to be transmitted and the address indicated by the address data included in the transmission signal received by the transmission signal transmission / reception circuit 32 match a preset unique address. The control data is fetched to control the above-described circuit elements and drive control of the display unit 33, and perform signal processing for returning the operation data of the operation unit 34 provided as monitoring data in the transmission signal return period. A terminal unit 36 comprising a signal processing unit 35 for controlling the circuit elements corresponding to the operation data of the unit 34.

  Furthermore, a power supply unit 37 comprising a switching power supply for converting the commercial power supply AC100V into a predetermined DC voltage is provided as an operating power supply unit for the audio / video circuit elements and the circuit elements of the terminal unit 36.

  The terminal unit 36 of the house information board 1 has a function of taking in the detection output of a fire prevention sensor such as a fire detector and sending it back as monitoring data to the alarm monitoring board 2 in the transmission signal return period. Illustration and detailed description of the system configuration are omitted.

  On the other hand, as shown in FIG. 3, the alarm monitoring panel 2 basically has the same circuit structure as that of the housing information panel 1 as the audio / video system circuit elements. . However, the alarm monitoring panel 2 includes a transmission unit 15 for performing monitoring control of each of the terminal units 20 and 34 using a time division multiplexed transmission signal.

  The transmission unit 15 transmits the address data as a return signal from the terminal units 20 and 36 during the return period of the transmission signal when accessing the terminal units 20 and 36 in order to access the terminal units 20 and 34. Based on a request for monitoring data, a signal processing unit 38 having a function of determining a terminal unit to be controlled and generating control data to be passed when the terminal unit is accessed; As a baseband signal, and within a transmission period of the transmission signal, a predetermined period is established between the paired lines L2 in the transmission signal transmission / reception circuits 16 and 32 of the terminal units 20 and 36 being accessed. A transmission signal transmission / reception circuit 39 for receiving a return signal returned as a current signal by being turned on / off via an impedance element; It made.

  Thus, in the present embodiment, in a normal time, when a visitor performs a calling operation by inputting a visited house number using the operation unit 18 of the low-by interphone device 3, the signal processing unit 19 of the terminal unit 20 is operated. Takes in this operation signal and returns the operation data obtained from the operation signal to the transmission unit 15 as monitoring data when accessed by the transmission signal.

  At the same time, the signal processing unit 19 of the terminal unit 20 activates the photographing camera 5 and causes the video digital modulation circuit 11 to output a video signal that captures the photographed visitor.

  The video digital modulation circuit 11 digitally modulates the video signal, and the demultiplexing circuit 14 arranges the modulated digital video signal in the frequency band C shown in FIG. Transmission is performed from the circuit 10 onto the pair line L1.

  On the other hand, the transmission unit 15 that has received the reply signal from the lobby intercom apparatus 3 determines the call destination from the monitoring data, and controls for call control using a transmission signal that accesses the terminal unit 36 of the house information panel 1 that is the call destination. Send data.

  The signal processing unit 35 of the terminal unit 36 of the house information panel 1 (alarm monitoring panel 2) accessed by the transmission signal of the transmission unit 15 controls the voice processing circuit 27 based on the control data to generate a calling voice signal. The sound is output to the speaker 23 via the amplifier 25 and a ringing tone is generated from the speaker 23. Further, the signal processing unit 35 activates the monitor device 31.

  On the other hand, the digital video signal received by the transmission / reception circuit 26 is separated by the demultiplexing circuit 29 by the housing information board 1 via the pair line L1, and then demodulated into a video signal by the video digital demodulation circuit 30 and started. It is reproduced on the monitor device 31. The resident of the dwelling unit confirming the visitor displayed on the reproduction screen presses down the call button 34a of the operation unit 34. In response to the depression, the signal processing unit 35 activates the voice processing circuit 27 to enable transmission / reception using the micro 22 and the speaker 23, and at the same time, displays on the display unit 33 that the call is in progress, and also depresses it. Monitoring data indicating that there has been an operation is returned to the transmission unit 15 during the transmission signal return period.

  Upon receiving this monitoring data, the transmission unit 15 sends control data for displaying the call state to the lobby intercom apparatus 3 at the next access. Based on the received control data, the signal processing unit 19 of the terminal unit 20 of the lobby intercom apparatus 3 displays that the telephone conversation state has been entered on the display unit 17.

  When the telephone conversation state is entered, the call voice of the visitor on the lobby intercom apparatus 3 side is output as an analog voice signal from the microphone 6 and input to the voice processing circuit 12 via the amplifier 8. The audio processing circuit 12 converts the analog audio signal into a digital audio signal and then outputs the digital audio signal to the audio digital modulation / demodulation circuit 13. The digital modulation / demodulation circuit 13 digitally modulates the digital audio signal and then outputs it to the demultiplexing circuit 14. The demultiplexing circuit 14 arranges the digital audio signal in the downstream frequency band A of FIG. 4A for multiplexing, and then transmits the digital audio signal from the transmission / reception circuit 10 onto the pair line L1.

  The digital audio signal transmitted from the calling side becomes a downstream digital audio signal. The downstream digital audio signal is received together with the digital video signal by the transmission / reception circuit 26 of the house information board 1, separated by the demultiplexing circuit 29, further demodulated by the audio digital modulation / demodulation circuit 28, and then analog by the audio processing circuit 27. It is converted into an audio signal. This analog audio signal is input to the speaker 23 through the amplifier 25 and reproduced.

  On the other hand, the call voice of the resident on the house information board 1 side is output as an analog voice signal from the microphone 22 and is input to the voice processing circuit 27 via the amplifier 24. The audio processing circuit 27 converts the analog audio signal into a digital audio signal and then outputs the digital audio signal to the audio digital modulation / demodulation circuit 28. After the digital modulation / demodulation circuit 28 digitally modulates the digital audio signal, the digital modulation / demodulation circuit 28 multiplexes the signal by arranging it in the upstream frequency band B shown in FIG. Transmit on line L1.

  Then, after being received by the transmission / reception circuit 10 of the lobby intercom apparatus 3, it is separated by the demultiplexing circuit 14, further demodulated by the audio digital modulation / demodulation circuit 8, and then converted into an analog audio signal by the audio processing circuit 12. This analog audio signal is input to the speaker 7 through the amplifier 9 and reproduced.

  As described above, a two-way communication path is established between the lobby intercom apparatus 3 and the called house information panel 1.

  Next, when the resident performs a call termination operation by depressing the call button 34a of the operation unit 34, the signal processing unit 35 of the terminal unit 36 stops the operation of the monitor device 31 and the operation of the voice processing circuit 27 and the display unit. The call status display by 33 is turned off. In addition, when accessed by the transmission unit 15, monitoring data indicating a call stop is returned during the transmission signal reply period.

  When the monitoring data indicating the call stop is returned, the transmission unit 15 sends control data corresponding to the call stop to the terminal unit 20 by a transmission signal for accessing the lobby intercom device 3. Upon receiving this control data, the terminal unit 20 stops the operation of the photographing camera 5 and the operation of the voice processing circuit 12, and turns off the call state display on the display unit 17.

  In this way, the communication path between the lobby intercom device 3 and the house information panel 1 is opened and the standby state is restored.

  FIG. 4B shows the frequency band of the transmission signal.

  In the above description of the operation, the call between the lobby intercom device 3 and the house information panel has been described. However, when calling the house information board 1 from the alarm monitoring board 2, the signal processing unit 35 of the transmission unit 15 Upon receiving operation data of the operation unit 34, control data for calling is sent to the house information board 1 by a transmission signal. In addition, the frequency band A of the digital audio signal transmitted from the alarm monitoring panel 2 is set to the same frequency band A as when the digital audio signal from the lobby intercom device 3 is transmitted.

  In the present embodiment configured as described above, since the video signal and the audio signal are digitized and transmitted on the pair line L1, and the transmission signal for monitoring control is transmitted via the pair line L2, each signal is narrowed. Therefore, it is possible to use the pair line used in the conventional intercom system as the pair line L1 and the pair line L2, so that the wiring cost is low at the time of new construction, and the existing system When renewing the cable, two of the three-pair wires that have been used up to that point can be used as they are, and the renewal cost is reduced. Further, since the audio signal is digitized, it is not necessary to consider the influence of inductive noise, and a small switching power supply that converts the commercial power supply AC100V to a predetermined DC voltage can be used as the power supply unit 21.

(Embodiment 2)
In the lobby intercom apparatus 3 of the first embodiment, the digital audio signal and the digital video signal are modulated by separate modulation circuits (the audio digital signal modulation / demodulation circuit 13 and the video digital modulation circuit 11). In FIG. 5, the received digital audio signal and digital video signal are demodulated by separate demodulation circuits (audio digital signal modulation / demodulation circuit 28, video digital demodulation circuit 30), but in this embodiment, as shown in FIG. In the lobby intercom apparatus 3, the compressed audio signal output from the audio processing circuit 12 and the video signal from the photographing camera 5 are multiplexed by the multiplexing circuit 40, and then digitally modulated by the audio / video digital modulation circuit 41. As shown in FIG. Further, the demultiplexing circuit 13 frequency-multiplexes the frequency band B ′ of the digital audio signal on the pair line L1, and transmits the frequency band B ′ from the transmission / reception circuit 10 onto the pair line L1. On the other hand, the received digital audio signal is separated by the demultiplexing circuit 14 and then demodulated by the audio digital demodulation circuit 42. In the housing information board 1, the digital video signal and the digital audio signal received by the transmission / reception circuit 26 are separated by the demultiplexing circuit 29 as shown in FIG. Demodulate. The demodulated audio signal is separated from the demodulated video signal by the separation circuit 44 and then taken into the audio processing circuit 27. On the other hand, the digital audio signal transmitted from the house information board 1 is converted from the digital audio signal output from the audio processing circuit 27 by the audio digital modulation circuit 45 and then paired from the transmission / reception circuit 26 via the demultiplexing circuit 29. Sent on L1.

  Since the system configuration is the same as that of the first embodiment and the configuration of the alarm monitoring panel 2 is the same as that of the house information panel 1, illustration and description are omitted. Since the frequency band of the transmission signal is the same, the illustration is omitted.

  As described above, in the present embodiment, the video signal and the analog audio signal are digitally modulated by the same modulation circuit in the lobby intercom device 3, and the received digital audio signal and the video signal are demodulated in the house information panel 1 and the alarm monitoring panel 2. By demodulating with the same demodulation circuit, the video and audio are modulated or demodulated with the same modulation circuit or demodulation circuit, thereby reducing the cost compared to the case where the audio modulation and demodulation is performed with one circuit. Yes.

(Embodiment 3)
In this embodiment, as shown in FIGS. 7A and 7B, two sets of transmission / reception circuits 10a, 10b and 26a, 26b are provided in the lobby intercom device 3 and the house information panel 1, respectively, and one connection end is paired. The other connection end is connected to the line L 1 and the pair line L 3, and is connected to the demultiplexing circuit 29 by changeover switches 51 and 50. That is, the changeover switches 51 and 50 are set to one of L1 and L3 as the first pair line used also as a transmission line. Of course, the alarm monitoring panel 2 has the same configuration as the housing information panel 1. The lobby intercom apparatus 3 is the same as that of the first embodiment. The wiring in the apartment house is performed using a three-pair line 4 ′ composed of pair lines L1 to L3.

  Thus, in the present embodiment, for example, as shown in FIG. 8, when two lobby intercom devices 3 are installed, if any lobby intercom device 3 calls the house information panel 1, the lobby intercom device 3 The data of the paired line (L1 or L3) connected from the terminal unit 20 is sent as a return signal to the transmission unit 15 together with the operation data. When the transmission unit 15 receives this data, the data of the called house information panel 1 is received. Control data for controlling the changeover switch 50 is sent to the terminal unit 36 so as to select a pair line L1 or L3 that is not used by another lobby intercom apparatus 3, and to the terminal unit 20 of the lobby intercom apparatus 3 Even if the changeover switch 51 is switched to the corresponding pair line L1 or L3, the control data is sent. It has become the jar.

  That is, when two lobby intercom apparatuses 3 are installed, the called house information board 1 and the calling lobby intercom apparatus 3 are automatically connected to an empty pair line (L1 or L3). As a result, a call can be made between the lobby intercom device 3 and the house information board 1, and a visitor photographed by the photographing camera 5 of the lobby intercom device 3 can be monitored by the monitor device 31.

  By the way, in the case where three or more lobby intercom devices 3 are installed, the three pair wires 4 ′ are wired and the transmission / reception circuits 10a and 10b of each lobby intern device 3 are switched and connected to the pair wires L1 or L3. Two lobby intern devices 3 can be used simultaneously.

  Note that the frequency band arrangement configuration for frequency multiplexing is the same as that of the first embodiment regardless of which of the pair lines L1 and L3 is used, and is not shown. Further, since the arrangement of the frequency band of the transmission signal is the same, it is not shown. By the way, the configuration of the present embodiment may be added to the configuration of the second embodiment. In this case, the configurations of the lobby intern device 3 and the housing information board 1 are as shown in FIGS. Of course, the configuration of the alarm monitoring panel 2 is the same as that of the housing information panel 1. The lobby intercom apparatus 3 is the same as that of the second embodiment.

(Embodiment 4)
The present invention is based on the premise that digital audio signals are used, but in the case of renewal, this embodiment corresponds to a request from an owner who wants to use an existing intercom device for homes that uses analog audio.

  That is, this embodiment is characterized in that the following analog audio system configuration is added to the lobby intercom apparatus 3 having basically the same configuration as that of the first embodiment as shown in FIG.

  That is, an upstream analog audio signal inserted between the transmission / reception circuit 10 and the pair line L1 and transmitted in the frequency band E of about 300 to 3.4 KHz as shown in FIG. A demultiplexing circuit 61 that multiplexes and transmits a downstream analog audio signal to the line L1 with respect to the upper and lower digital audio signals and the digital video signal, an analog audio signal separated by the demultiplexing circuit 61, and a pair An analog audio transmission / reception circuit 62 for inputting / outputting an analog audio signal for transmission to be transmitted on the line L1 via a two-line signal path, and a call audio input from the microphone 6 via an amplifier 8 The analog audio signal received by the analog audio transmission / reception circuit 62 is sent to the transmission / reception circuit 62 via the signal line of two lines. Inclusive, via the amplifier 9 are added to the configuration of Embodiment 1 and a two-wire four-wire conversion circuit 63 to be output to the speaker 7. On the other hand, the housing information board (and alarm monitoring board 2) is the same as that of the first embodiment.

  Thus, in the case where the existing interphone devices 1 ′ corresponding to analog voice are mixed as shown in FIG. 12, when the interphone device 1 ′ is called from the lobby intercom device 3 side, the signal processing unit 19 of the terminal unit 20 is used. By operating the analog audio system circuit elements under the control of the above, the lobby intercom apparatus 3 and the intercom apparatus 1 ′ can talk.

  Further, when a call is made between the intercom device 1 ′ and the alarm monitoring panel 2, a similar analog voice system circuit element may be added to the alarm monitoring panel 2.

  In addition, if the structure of this embodiment is added to the structure of Embodiment 2 as shown in FIG. 13, the advantage of Embodiment 2 is also acquired. The frequency band arrangement configuration for frequency multiplexing in this case is as shown in FIG.

  Furthermore, if the configuration of the present embodiment is added to the configuration of the third embodiment, the interphone physical speech path is set to 2 channels, and an analog audio system is added to each channel, so that the interphone call channel is 4 channels. In addition, the advantages of the third embodiment are also obtained. In this case, the frequency band arrangement configuration for frequency multiplexing on the pair line L1 is as shown in FIG. 15A, and the frequency band arrangement configuration for frequency multiplexing on the pair line L3 is shown in FIG. 15B. As shown.

  Further, when the configuration of the third embodiment and the configuration of the second embodiment are combined with this embodiment, the number of call channels for intercoms can be changed to four, and the advantages of the third embodiment and the second embodiment can be obtained. Will be. In this case, the frequency band arrangement configuration for frequency multiplexing on the pair line L1 is as shown in FIG. 16 (a), and the frequency band arrangement configuration for frequency multiplexing on the pair line L3 is shown in FIG. 16 (b). As shown.

(A) The block diagram of the lobby intercom apparatus used for Embodiment 1, (b) is the block diagram of the housing information board used for the same as the above. It is a system block diagram same as the above. It is a block diagram of the alarm monitoring board used for the same as the above. (A) is a frequency band arrangement explanatory diagram of the digital audio signal and digital video signal in the above, and (b) is a frequency band arrangement explanatory diagram of the transmission signal in the above. (A) is a block diagram of the lobby intercom apparatus used for Embodiment 2, (b) is a block diagram of the housing information board used for the same as the above. It is arrangement | positioning explanatory drawing of the frequency band of a digital audio signal and a digital video signal in the same as the above. (A) is a block diagram of the lobby intercom apparatus used for Embodiment 3, (b) is a block diagram of the housing information board used for the same as the above. It is a system block diagram same as the above. (A) is a block diagram of the lobby intercom apparatus of another example same as the above, (b) is a block diagram of the housing information board of another example of the same above. It is a block diagram of the lobby intercom apparatus of Embodiment 4. It is arrangement | positioning explanatory drawing of the frequency band of a digital audio signal and a digital video signal in the same as the above. It is a system block diagram same as the above. It is a block diagram of the lobby intercom apparatus of another example same as the above. It is arrangement | positioning explanatory drawing of the frequency band of the digital audio | voice signal and digital video signal in another example same as the above. (A) Arrangement explanatory drawing of the frequency band of one pair line digital audio signal and digital video signal in another example of the above, (b) is one pair line digital audio signal and digital of the other example in the above It is arrangement | positioning explanatory drawing of the frequency band of a video signal. (A) Arrangement explanatory drawing of the frequency band of the digital audio signal and digital video signal of one pair line of the other example in the same as above, (b) Digital audio signal and digital of one pair line of the other example of the above same It is arrangement | positioning explanatory drawing of the frequency band of a video signal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Residential information board 3 Lobby intercom apparatus 4 2 pair line 5 Shooting camera 6,22 Microphone 7,23 Speaker 8,9,24,25 Amplifier 10,26 Transmission / reception circuit 11 Image | video digital modulation circuit 12,27 Audio processing circuit 13,28 Audio digital modulation / demodulation circuit 14, 29 Demultiplexing circuit 16, 32 Transmission signal transmission / reception circuit 17, 33 Display unit 18, 34 Operation unit 19, 35 Signal processing unit 20, 36 Terminal unit 21, 37 Power supply unit 30 Video digital demodulation circuit 31 Monitor Device L1, L2 Pair wire

Claims (4)

At least an audio signal during an interphone call between the lobby intercom device and the home intercom device provided in the dwelling unit, and an image taken by a shooting camera for shooting a visitor of the lobby intercom device, and a monitor device of the home intercom device The video signal of the video to be displayed is converted into a digital signal and transmitted onto the first pair line, and a monitoring control signal including call control is transmitted to the lobby intercom apparatus and the house via the second pair line. Monitoring / communication system for collective housing, characterized in that it is transmitted to and from an intercom device. 2. The set according to claim 1, wherein means for transmitting and receiving voice during an interphone call as an analog voice signal is added to the lobby intercom apparatus along with the digital signal via the first pair line. Residential monitoring and calling system. The said intercom apparatus for houses is provided with the means to switch and connect the said 1st pair line from the several lobby intercom apparatus according to the call from the said lobby intercom apparatus, or 1 characterized by the above-mentioned. 2. A monitoring and calling system for collective housing as described in 2. Provided on the lobby intercom device side, the means for digitally modulating the digital audio signal to be transmitted and the means for digitally modulating the video signal of the visitor photographing camera are composed of one modulation means, and provided on the house intercom device side. 4. A monitoring system for an apartment house according to claim 1, wherein the demodulating means for demodulating the received digital audio signal and the means for demodulating the digital video signal comprise a single demodulating means.・ Call system.

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