JP2007202121A - Voice transmission system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a voice transmission system for simplifying installation and attaining cost reduction by eliminating the need for incorporating a speaker or a buzzer or the like to a detector and wiring from voice terminals to the detector. <P>SOLUTION: The detector 4 includes: a detection section 40 for detecting failure a wireless signal transmission section 41 for transmitting a wireless signal through a wireless medium such as light or a radio wave; and a control section 42 that allows the wireless signal transmission section 41 to transmit a wireless signal for informing failure detection when the detection section 40 detects the failure. Since each voice terminal 2 for receiving the wireless signal transmitted from the detector 4 outputs an alarm sound from its speaker 20b, it is not required to incorporate the speaker or the buzzer or the like to the detector 4, and the wiring to the detector 4 is not needed by informing each voice terminal 2 about the failure detection notice from the detector 4 by means of the wireless signal. As a result, the voice transmission system can simplify the installation and attain cost reduction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an audio transmission system that transmits an audio signal via a signal line.

Conventionally, as an audio transmission system that transmits an audio signal through a signal line, for example, a housing information panel installed in each dwelling unit of a housing complex, a door phone slave installed at the entrance of each housing unit, It is equipped with a lobby intercom installed in the common entrance (lobby) and an alarm monitoring panel installed in the management room, and audio signals are transmitted via signal lines between the lobby intercom or the alarm monitoring panel and each house information panel. There is an intercom system (housing information board system) that can make a phone call or transmit a voice signal via a separate telephone line between the door phone slave unit and the housing information board (for example, a patent) Reference 1). Moreover, in such a housing information panel system, two types of housing information panels, a master unit and a secondary master unit, are installed in the same dwelling unit, and extension calls can be made between the master unit and the secondary master unit. One or more crime prevention sensor devices or disaster prevention sensor devices (detection devices) installed in the main unit and the master unit are connected via a communication line, and an abnormality detection signal communicates when an abnormality is detected by the crime prevention sensor device or the disaster prevention sensor device. It was transmitted to the main unit via a line, and an alarm sound was sounded in the main unit.
JP 11-219490 A

  However, in the above-described conventional system, it is necessary to connect each detection device to the housing information panel master through a communication line, and there is a problem that it is troublesome to add the detection device to the system. In addition, it is conceivable that each detection device has a built-in speaker or buzzer to sound an alarm sound. However, if a speaker or buzzer for sounding the alarm sound is provided, not only the size of the speaker or buzzer but also the opening for sounding. The size of the detection device is increased due to the necessity of providing a part. For example, it is not possible to cope with a case where a place where an abnormality is to be detected is separated from a place where an alarm sound is to be generated.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a voice transmission system in which a built-in speaker, buzzer, etc. in the detection device and wiring are not required, and the construction can be simplified and the cost can be reduced. It is in.

  In order to achieve the above object, the first aspect of the present invention provides one or more voice input terminal devices including at least voice input means for inputting voice and one or more voice output means for outputting voice at least. A voice input terminal device, a voice input terminal device, and a main device connected to the voice output terminal device via a signal line, and a voice signal is transmitted from the voice input terminal device to the voice output terminal device via the main device. An audio transmission system that performs division multiplexing transmission, and includes one or more detection devices that are installed indoors and detect an abnormality such as a fire or a suspicious person, and the detection device detects the abnormality; Wireless signal transmission means for transmitting a wireless signal for notifying abnormality detection when an abnormality is detected by the detection means, and the voice output terminal device includes the wireless signal And wireless signal receiving means for receiving, characterized by comprising a control means for outputting an alarm sound from the sound output unit when receiving a wireless signal in a wireless signal receiving means.

  According to a second aspect of the present invention, in the first aspect of the present invention, the voice output terminal device includes voice signal receiving means for receiving a voice signal transmitted in a downlink time slot via the signal line, and the signal line. A control signal transmitting means for transmitting a control signal to and from the main apparatus via the communication means, and a notification means for notifying the main apparatus by the control signal that an abnormality has been detected when the wireless signal is received by the wireless signal receiving means. The main apparatus receives the audio signal transmitted by the audio input terminal apparatus in the uplink time slot and transmits the audio signal to the audio output terminal apparatus in the downlink time slot. Control signal transmission means for transmitting a control signal between the control means and at least the voice output terminal device via the signal line, and abnormality detection is notified by the control signal. Control means for causing the audio output terminal apparatus to transmit the alarm sound to the audio signal transmitting / receiving means in a downlink time slot, and the audio output terminal apparatus receives the audio signal received by the audio signal receiving means. An alarm sound is generated from the sound output means.

  According to a third aspect of the present invention, in the second aspect of the present invention, the control unit of the main device sends the alarm sound to one or more audio output terminal devices other than the audio output terminal device that has notified the abnormality detection. The audio signal transmission / reception means is transmitted in a directional time slot.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the control unit of the main device notifies a group of one or more audio output terminal devices including the audio output terminal device that has notified the abnormality detection, and an abnormality detection. The sound signal transmitting / receiving means transmits a different alarm sound to each of one or more other sound output terminal device groups not including the sound output terminal device.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein at least one of the plurality of voice input terminal devices or voice output terminal devices is picked up by the image pickup means and the image pickup means. Modulation means for modulating the video image, and video signal transmission means for transmitting the video signal modulated by the modulation means in a frequency band different from the frequency band of the audio signal, wherein the main device is the audio input terminal device or Video signal receiving means for receiving a video signal transmitted by the audio output terminal device; demodulating means for demodulating the video signal received by the video signal receiving means; and display means for displaying the video demodulated by the demodulating means. It is characterized by that.

  According to the first aspect of the present invention, it is not necessary to incorporate a speaker, a buzzer or the like in the detection device in order to sound an alarm sound from the audio output means of the audio output terminal device when an abnormality is detected by the detection device. By notifying abnormality detection from the detection device to the voice output terminal device with a wireless signal, wiring to the detection device becomes unnecessary, and as a result, construction can be simplified and cost can be reduced.

  According to the second aspect of the present invention, since the alarm sound that rings in the voice output terminal device is transmitted from the main device, it is not necessary to hold the alarm sound in the voice output terminal device, so the configuration of the voice output terminal device is simple. Can be

  According to invention of Claim 3, abnormality detection can be reliably notified by sounding an alarm sound from arbitrary audio | voice output terminal devices.

  According to invention of Claim 4, the alarm sound suitable for the installation place of an audio | voice output terminal device can be sounded.

  According to invention of Claim 5, the image | video imaged with the audio | voice input terminal device or the output terminal device can be displayed on the display means of a main apparatus, for example, the said audio | voice input terminal device or an output terminal device is outside a dwelling unit. In the case of a door phone slave installed at the entrance, the main device installed in the dwelling unit can check the video of the visitor, improving usability.

  Hereinafter, an embodiment in which the technical idea of the present invention is applied to an intercom system for a detached house will be described in detail.

(Embodiment 1)
As shown in FIG. 1, the audio transmission system (interphone system) of the present embodiment is connected to a plurality of audio terminal devices 2 installed indoors in a dwelling unit H, and the plurality of audio terminal devices 2 via a signal line Ls. Main device (parent device) 1, door phone sub unit 3 installed outside unit (exterior) of dwelling unit H and connected to parent device 1 via communication line Lx, and one or more installed indoors The detection device 4 is provided. In a room, the main device 1 as a main device is installed in the living room, a plurality of voice terminal devices 2 are installed in other rooms (for example, private rooms of each family), and the detection device 4 is installed in a kitchen or the like. Yes. Note that although a balanced line such as a pair line is used as the signal line Ls, an unbalanced line such as a coaxial line may be used. Further, a pair of enhanced category 5 or category 6 LAN cables or a pair of CPEV cables may be used for the signal line Ls.

  The intercom unit 3 includes a microphone 30, a speaker 31, a microphone amplifier 32a that amplifies the output of the microphone 30, a speaker amplifier 32b that amplifies the input to the speaker 31, a call button 33 that is operated by the visitor, and a visitor. A video signal output from the camera unit 34, and audio / video demultiplexing for frequency-division multiplexing of the audio signal and 2-line 4-line conversion processing of the audio signal and transmission processing of the calling signal Part 35 and a terminal part 36 to which the communication line Lx is connected. However, since the structure of the door phone sub unit 3 is well known in the art, a detailed description thereof will be omitted.

  The detection device 4 includes a detection unit 40 that detects an abnormality, a wireless signal transmission unit 41 that transmits a wireless signal using a wireless medium such as light and radio waves, and a wireless signal transmission unit 41 when an abnormality is detected by the detection unit 40. Includes a control unit 42 that transmits a wireless signal for notifying abnormality detection, and a power supply unit 43 that supplies the operation power of the units 40 to 42 using a battery as a power source. For example, the detection unit 40 can detect an intruder by an optical smoke detection function, a function to detect a temperature rise due to a fire, a function to detect the concentration of combustible gas by a gas sensor, or a human sensor using a pyroelectric element. Although it has a detection function, etc., any detection function can be realized by a conventionally well-known technique, and therefore detailed illustration and description are omitted. Note that the wireless signal transmission unit 41 is built in a base member disposed in advance on a ceiling surface or a wall surface on which the detection device 4 is disposed, and does not cause an increase in size of the detection device 4 and is a problem. Wireless communication is possible.

  The audio terminal device 2 includes a microphone 20a and a speaker 20b, a microphone amplifier 21a that amplifies the output of the microphone 20a, a speaker amplifier 21b that amplifies the input to the speaker 20b, and modulates and demodulates the audio signal using a digital modulation method. A control signal is transmitted via the signal line Ls between the audio signal multiplex transmission processing unit 22 for time division multiplex transmission (TDMA <Time Division Multiple Access>) stored in the time slot and the downlink time slot, and the base unit 1. A control signal transmission processing unit 23 for transmission, a demultiplexing unit 24 for frequency-division multiplexing and demultiplexing of the control signal and the audio signal, a control unit 25 for controlling each unit with the CPU as a main component, an extension button described later, An operation unit 26 having an operation button (not shown) such as a response button and outputting an operation signal to the control unit 25 in accordance with the operation of the operation button, and a signal line L There comprises a terminal portion 27 connected, the wireless signal reception unit 28 for receiving a wireless signal transmitted from the detecting device 4. That is, the voice terminal device 2 according to the present embodiment is a voice input terminal device because both the voice input means (microphone 20a) for inputting voice and the voice output means (speaker 21a) for outputting voice are provided. At the same time, it is a voice output terminal device. However, the configuration of the voice terminal device 2 is not limited to this, and a voice input terminal device having voice input means and no voice output means, or having voice output means and no voice input means. It may be configured as an audio output terminal device. However, at least an audio output terminal device is necessarily required in the room in which the detection device 4 is disposed. Each voice terminal apparatus 2 is given a unique identification code (ID), and each terminal apparatus 2 can be identified by this identification code.

  The audio signal multiplex transmission processing unit 22 converts an analog audio signal output from the microphone 20a and amplified by the microphone amplifier 21a into a digital signal, and performs BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), 16QAM. (Quadrature Amplitude Modulation), a process of modulating by a digital modulation method such as 64QAM, and a process of demodulating the audio signal separated from the control signal by the demultiplexer 24 and converting it to an analog signal and outputting it to the speaker amplifier 21b . The control signal transmission processing unit 23 also modulates the control data given from the control unit 25 by a modulation scheme such as FSK (frequency shift keying) or PSK (phase shift keying), and the demultiplexing unit 24 performs audio signal processing. And a process of demodulating the separated control signal and passing control data to the control unit 25. Each voice terminal apparatus 2 is given a unique identification code (ID), and each voice terminal apparatus 2 can be identified by this identification code.

  The base unit 1 includes a terminal unit 10a to which the call line Lx is connected and a terminal unit 10b to which the signal line Ls is connected, and a video signal and an audio signal that are frequency-division multiplexed and transmitted from the doorphone sub unit 3 through the call line Lx. And a video signal separated by the demultiplexing unit 11 having a display device such as a liquid crystal display or a CRT, and a demultiplexing unit 11 for transmitting an audio signal to the doorphone sub unit 3 via the communication line Lx. The monitor unit 12 that demodulates and displays the signal, the microphone 13a and the speaker 13b, the microphone amplifier 13c that amplifies the output of the microphone 13a, the speaker amplifier 13d that amplifies the input to the speaker 13b, and echo cancellation processing (sound signal) Digital processing that suppresses unpleasant echoes) and voice switch processing (loss on the low volume side between the sending and receiving sides) A speech processing unit 14 for performing a speech direction control process that preferentially outputs an audio signal with a high volume and the like, and the audio signal is modulated and demodulated by a digital modulation method, and stored in upstream and downstream time slots. A voice signal multiplex transmission processing unit 15 that performs time division multiplex transmission, a control signal transmission processing unit 16 that transmits a control signal via the signal line Ls between each voice terminal device 2, and a frequency of the control signal and the voice signal. A demultiplexing unit 17 that performs division multiplexing and demultiplexing, a control unit 18 that controls each unit with a CPU as a main component, and a storage unit 19 that stores ringing tone data and the like to be described later.

  The call processing unit 14 includes a DSP (digital signal processor), an A / D converter, a D / A converter, a codec circuit, and the like. An analog audio signal transmitted via Lx is converted into a digital audio signal, which is caused by acoustic coupling between the microphone 30 and the speaker 31 of the door phone slave unit 3, acoustic coupling between the microphone 13a and the speaker 13b of the base unit 1, or the like. Processing is performed such as suppressing unpleasant echoes and comparing the direction of the voice by comparing the level of the voice (speech voice) input from the microphone 13a and the voice (received voice) transmitted from the doorphone slave unit 3. . Further, the call processing unit 14 generates unpleasant echoes with the voice terminal device 2 due to acoustic coupling between the microphone 20a and the speaker 20b of the voice terminal device 2, acoustic coupling between the microphone 13a and the speaker 13b of the parent device 1, or the like. Processing to suppress or switch the call direction by comparing the level of the voice (transmitted voice) input from the microphone 13a and the voice (received voice) transmitted from the voice terminal device 2 is performed. Further, when the voice terminal devices 2 talk to each other individually (extension call), the call processing unit 14 performs signal processing on the voice signals stored and transmitted from the respective voice terminal devices 2 in the uplink time slot. By doing so, unpleasant echo caused by acoustic coupling between the microphone 20a and the speaker 20b is suppressed, or the call direction is switched by comparing the level of the audio signal.

  Here, in the base unit 1, the synchronization signal is sent to the signal line Ls via the demultiplexing unit 17 under the control of the control unit 18. A plurality (2n) of time slots are arranged within a period (signal transmission period) from the start of the time slot until the next synchronization signal rises. The first n time slots are in the up direction, and the second n time slots are in the down direction. Hereinafter, in order to simplify the description, an uplink time slot is referred to as an “uplink slot”, a downlink time slot is referred to as a “downlink slot”, and a combination of an uplink slot and a downlink slot is referred to as a channel. Therefore, in this embodiment, n (n channels) uplink slots and downlink slots are arranged in the signal transmission period, so that a maximum of n voice terminal apparatuses 2 can individually talk on a one-to-one basis.

  Next, the operation of this embodiment when a one-to-one call (individual call) is performed between two voice terminal apparatuses 2 will be described with reference to FIG. In the following, a case where two units of the voice terminal device 2A and the voice terminal device 2B make an individual call will be exemplified.

  First, when an extension button (not shown) of the operation unit 26 is operated in the voice terminal device 2A, an operation signal is output from the operation unit 26 to the control unit 25, and the control unit 25 that has received the operation signal receives the extension call. Request control data is generated and given to the control signal transmission processing unit 23. The control signal transmission processing unit 23 sends the control data of the extension call request and its own identification code through the demultiplexing unit 24 and the terminal unit 27 by the control signal. The signal is sent to the signal line Ls.

  On the other hand, in base unit 1, the control signal transmitted via signal line Ls is separated by demultiplexing unit 17 and received by control signal transmission processing unit 16, and the extension call request and request source included in the received control signal. Is sent to the control unit 18. The control unit 18 reads out the ringing tone data stored in the storage unit 19 and gives it to the call processing unit 14. The control unit 18 causes the speaker 13 b to ring through the call processing unit 14 and includes the identification code of the request source. A control signal including the ringing tone data with all the identification codes as destinations is transmitted by the control signal transmission processing unit 16 via the signal line Ls.

  In the voice terminal devices 2A, 2B, 2C, 2D, when the control signal transmission processing unit 23 receives the control signal transmitted from the base unit 1, and passes the ringing tone data included in the received control signal to the control unit 25, The control unit 25 converts the ringing tone data into an analog ringing tone signal, and causes the speaker 20b to ring through the voice signal multiplex transmission processing unit 22. When an extension button (not shown) of the operation unit 26 is operated in the voice terminal device 2B, an operation signal is output from the operation unit 26 to the control unit 25, and the control unit 25 that receives the operation signal receives a request. Control data of a response (extension response) indicating that the individual call with the original voice terminal apparatus 2A has been accepted is generated and given to the control signal transmission processing unit 23, and the control signal transmission processing unit 23 The self identification code is sent to the signal line Ls via the demultiplexing unit 24 and the terminal unit 27 by the control signal.

  In base unit 1, control signal transmitted from voice terminal apparatus 2 B is received by control signal transmission processing unit 16, and extension response control data and response destination identification code included in the received control signal are sent to control unit 18. Then, the control unit 18 causes the control signal transmission processing unit 16 to transmit a control signal including control data for extension response permission with the request source identification code as a destination.

  Then, in all the voice terminal devices 2 including the request source voice terminal device 2A and the response destination voice terminal device 2B, the control unit 25 stops ringing of the ringing tone by the speaker 20b. Here, it is assumed that a time slot of channel 1 is allocated to the requesting voice terminal apparatus 2A, and a time slot of channel 2 is allocated to the voice terminal apparatus 2B of the response destination. Accordingly, in the requesting voice terminal apparatus 2A, the voice (transmission voice) input from the microphone 20a is modulated by the voice signal multiplex transmission processing unit 22, and the modulated voice signal (transmission signal) is transmitted to the channel 1 upstream. The data is stored in the slot and transmitted to the base unit 1 through the signal line Ls. In base unit 1, a voice signal (transmission signal) transmitted from voice terminal apparatus 2 </ b> A is received by voice signal multiplex transmission processing unit 15, demodulated, and output to call processing unit 14. Then, the call processing unit 14 performs echo suppression processing, call direction switching processing, and the like (hereinafter referred to as “amplified call processing”) on the audio signal, and the processed audio signal is again transmitted to the audio signal multiplex transmission processing unit 15. Then, the data is modulated and stored in the downlink slot of channel 2 and transmitted to the voice terminal device 2B as the response destination.

  Then, in the response destination voice terminal apparatus 2B, the voice signal stored in the downlink slot of channel 2 is taken in, demodulated by the voice signal multiplex transmission processing unit 22 and the received voice is sounded from the speaker 20b, and the microphone 20a. Is modulated by the audio signal multiplex transmission processing unit 22, the modulated audio signal (transmission signal) is stored in the upstream slot of channel 2, and the master unit 1 is connected via the signal line Ls. Transmit to. In base unit 1, a voice signal (transmission signal) transmitted from voice terminal apparatus 2 B is received by voice signal multiplex transmission processing unit 15, demodulated and output to call processing unit 14. Call processing is performed, and the processed audio signal is again modulated by the audio signal multiplex transmission processing unit 15 and stored in the downlink slot of channel 1 and transmitted to the audio terminal device 2A. Then, in the voice terminal device 2A, the voice signal stored in the downlink slot of channel 1 is taken in, demodulated by the voice signal multiplex transmission processing unit 22, and the received voice is sounded from the speaker 20b. 2A and B can transmit and receive audio signals using the time slots of channels 1 and 2 to enable individual calls. Note that the assignment of channels to be used for all voice terminal apparatuses 2A, 2B, 2C, and 2D may be determined in advance, or the assignment is notified by a control signal from the master unit 1 when actually performing an extension call. You may make it.

  In any of the detection devices 4, when the detection unit 40 detects an abnormality (for example, the occurrence of a fire), the control unit 42 controls the wireless signal transmission unit 41 to transmit a wireless signal for notifying abnormality detection. . In the voice terminal device 2 (for example, the voice terminal device 2A installed in the same room as the detection device 4) that has received the wireless signal, the content (abnormality detection) of the wireless signal received by the control unit 25 at the wireless signal reception unit 28 Notification) is obtained, and if the extension call is in progress, the extension call is forcibly terminated, and an alarm sound is generated from the speaker 20b via the voice signal multiplex transmission processing unit 22. However, this alarm sound may be a voice message informing the content of the detected abnormality (for example, fire occurrence).

  Thus, according to the present embodiment, when an abnormality is detected by the detection device 4, an alarm sound (voice message) sounds from the speaker 20 b of the voice terminal device 2. In addition, it is unnecessary to perform wiring to the detection device 4 by notifying the abnormality detection from the detection device 4 to the voice terminal device 2 by a wireless signal. As a result, the construction can be simplified and the cost can be reduced. .

(Embodiment 2)
Since the basic configuration of this embodiment is the same as that of the first embodiment, the same reference numerals are given to the same components as those of the first embodiment, and illustration and description thereof are omitted.

  In the first embodiment, a warning sound (voice message) is held in the voice terminal device 2 and a voice message held when a wireless signal is received from the detection device 4 is sounded from the speaker 20b. . Therefore, since a plurality of types of alarm sounds (voice messages) corresponding to the type of the detection device 4 must be held, the configuration (for example, memory capacity) of the voice terminal device 2 becomes complicated, resulting in an increase in cost. End up.

  Therefore, in the present embodiment, an alarm sound (voice message) corresponding to the detection device 4 is stored in the storage unit 19 of the parent device 1, and the voice terminal device 2 that has received the wireless signal from the detection device 4 is stored in the parent device 1. The transmission of the alarm sound is requested, and the alarm sound is transmitted from the parent device 1 to the voice terminal device 2 in response to the request.

  The operation of this embodiment will be described below with reference to FIG.

  When the detection unit 40 detects an abnormality in any of the detection devices 4, the control unit 42 controls the wireless signal transmission unit 41 to notify the abnormality detection (the content of the detected abnormality, for example, the occurrence of a fire). Send a signal. In the voice terminal device 2 that has received this wireless signal, the control unit 25 generates control data for notifying abnormality detection and gives it to the control signal transmission processing unit 23, and the control signal transmission processing unit 23 controls the abnormality detection notification. Data and its own identification code are sent to the signal line Ls via the demultiplexing unit 24 and the terminal unit 27 by the control signal.

  On the other hand, in the base unit 1, the control signal transmitted via the signal line Ls is separated by the demultiplexing unit 17 and received by the control signal transmission processing unit 16, and the abnormality detection notification and the notification source included in the received control signal are received. Is sent to the control unit 18. The control unit 18 generates control data for instructing the start of transmission of an alarm sound (voice message) and gives the control data to the control signal transmission processing unit 16, and the control signal transmission processing unit 16 issues an alarm to the voice terminal device 2 that is the notification source. A control signal including control data for starting sound transmission is transmitted. Further, the control unit 18 reads out an alarm sound corresponding to the detected content of the abnormality (for example, a voice message with a content such as “A fire has occurred in the grandfather's room”) from the storage unit 19 and performs a voice signal multiplex transmission process. The alarm sound (audio signal) modulated by the unit 15 and modulated in the downlink slot of channel 1 is stored and transmitted.

  Then, in the voice terminal device 2 that is the notification source, the control data of the alarm sound transmission start included in the control signal received by the control signal transmission processing unit 23 is passed to the control unit 25, and the control unit 25 starts the alarm sound transmission. When notified, the audio signal stored in the downlink slot of channel 1 is taken in, demodulated by the audio signal multiplex transmission processing unit 22, and an alarm sound (audio message) is sounded from the speaker 20b.

  As described above, according to the present embodiment, since it is not necessary to hold an alarm sound in the voice terminal device 2, the configuration of the voice terminal device 2 can be simplified. The same alarm sound may be generated not only from the voice terminal device 2 that has notified the abnormality detection, but also from other voice terminal devices 2. Specifically, the control data for starting the alarm sound transmission is transmitted to other voice terminal devices 2, and in the voice terminal device 2 that has received the control data, the control unit 25 is stored in the downlink slot of channel 1. What is necessary is just to take in the audio | voice signal currently received, and to demodulate with the audio | voice signal multiplex transmission process part 22, and to sound an alarm sound (voice message) from the speaker 20b. In this way, if an alarm sound is sounded from an arbitrary voice terminal device 2, abnormality detection can be reliably notified.

Further, different alarm sounds are transmitted in the downlink slots of different channels. For example, in the voice terminal device 2 as the notification source, the alarm sound ("fire has occurred. Evacuated immediately." Please send a voice message with the content of "Please speak." From the speaker 20b, and the other audio terminal device 2 is an alarm sound transmitted in the downlink slot of channel 2 (the content "The fire has occurred in the grandfather's room.") It is also possible to ring the voice message) from the speaker 20b. In this way, an alarm sound suitable for the installation location of the voice terminal device 2, for example, the voice terminal device 2 installed in the fire room and the voice terminal device 2 installed in another room, respectively. Alarm sound (voice message) suitable for the sound can be sounded. The selection of which alarm sound is to be sounded by which voice terminal device 2 may be performed by individually assigning the downlink slots of channels 1 and 2 with a control signal transmitted from base unit 1. Further, one alarm sound is transmitted to a group of a plurality of voice terminal devices 2 including the notification source voice terminal device 2, and the other is sent to a group of the plurality of voice terminal devices 2 not including the notification source voice terminal device 2 You may send an alarm sound. In the above-described first and second embodiments, voice transmission is performed using a total of 2n slots, that is, an uplink slot and a downlink slot. However, if the signal amount of a signal to be transmitted is large, the total of 2n slots It is also possible to perform signal transmission continuously for m cycles, with 1 cycle.
(Embodiment 3)
A system configuration diagram of this embodiment is shown in FIG. The present embodiment is characterized in that a voice terminal device 2E connected to the master unit 1 via a signal line Ls is installed at the outside entrance of the dwelling unit H instead of the door phone slave unit 3. However, since the basic configuration of the present embodiment is the same as that of the first or second embodiment, common components are denoted by the same reference numerals, and illustration and description thereof are omitted as appropriate.

  A voice terminal device (hereinafter referred to as a “door phone terminal device”) 2E installed at the outside entrance includes a camera unit 29a and a video signal multiplex transmission processing unit in addition to the same components as the other voice terminal devices 2A to 2D. 29b. The camera unit 29a is configured by an optical system such as an individual image sensor or a lens, and images a visitor. The video signal multiplex transmission processing unit 29b converts the analog video signal output from the camera unit 29a into a digital signal and modulates the modulated video signal (video) in a frequency band different from the frequency band for transmitting the audio signal. Data) is stored in the upstream slot and transmitted. In the demultiplexing unit 24, the video signal output from the video signal multiplex transmission processing unit 29b is frequency division multiplexed with the audio signal and the control signal.

  On the other hand, in the base unit 1 in the present embodiment, the video signal transmitted via the signal line Ls is separated by the demultiplexing unit 17, and the separated video signal is demodulated by the video signal processing unit 11 and from the digital signal. An image is displayed on the monitor unit 12 by converting it into an analog signal.

  Next, the operation of the present embodiment will be described by taking as an example a case in which a video image captured by the door phone terminal device 2E is displayed on the parent device 1 at the same time that a call is made between the parent device 1 and the door phone terminal device 2E.

  First, when a call button (not shown) provided on the operation unit 26 is operated in the door phone terminal device 2E, the control unit 25 generates a call notification for calling the base unit 1 and sends it to the control signal transmission processing unit 23. Then, the control signal transmission processing unit 23 sends the call notification and its own identification code to the signal line Ls via the demultiplexing unit 24 by the control signal. Further, the control unit 25 activates the camera unit 29a to image a person (visitor) who operates the call button, and converts an analog video signal output from the camera unit 29a into a digital signal by the video signal multiplex transmission processing unit 29b. And modulate. The modulated video signal is stored in the uplink slot (for example, the uplink slot of channel 5) assigned to the intercom terminal device 2E by the demultiplexing unit 24 and transmitted to the signal line Ls.

  On the other hand, in the base unit 1, the control unit 18 that has received the control signal for the call notification via the signal line Ls causes the speaker 13 b to ring and uses all the identification codes including the identification code of the request source as the destination. A control signal including ringing tone data is transmitted by the control signal transmission processing unit 16 via the signal line Ls. Also, a video signal transmitted from the door phone terminal device 2E via the signal line Ls is taken into the video signal processing unit 11 via the demultiplexing unit 17, demodulated by the video signal processing unit 11, and converted into an analog signal, An image is displayed on the monitor unit 12. Then, when a resident who has viewed the video on the monitor unit 12 operates a response button (not shown) of the base unit 1, the control unit 18 activates the call processing unit 14 to enable a call, and further the door phone terminal device 2E. The control signal transmission processing unit 16 causes the control signal transmission processing unit 16 to transmit the control signal including the control data including the control data to the notification that the telephone call is started (call start notification).

  In the intercom terminal device 2E, when the control signal of the call start notification is received by the control signal transmission processing unit 23, the control unit 25 activates the audio signal multiplex transmission processing unit 22 to enable a call, and the collected sound is collected by the microphone 20a. The audio signal output from the multiplex transmission processing unit 22 is multiplexed with the video signal by the demultiplexing unit 24 (frequency division multiplexing), stored in the assigned channel 5 uplink slot, and transmitted to the base unit 1. Further, the audio signal stored and transmitted from the base unit 1 in the downlink slot of channel 5 is separated by the demultiplexing unit 24, and the separated audio signal is input to the audio signal multiplex transmission processing unit 22 and is transmitted from the speaker 24b. Ring.

  In the base unit 1, the audio signal (received signal) and the video signal transmitted from the door phone terminal device 2E are separated by the demultiplexing unit 24, received by the audio signal multiplex transmission processing unit 15, and demodulated to be processed by the call processing unit 14. Output to. Then, the call processing unit 14 performs loudspeaking call processing on the voice signal (received signal) and causes the speaker 13b to ring with the processed voice signal (analog signal). Further, the voice signal (transmission signal) output from the microphone 13 a is subjected to the voice call processing by the call processing unit 14, and then converted and modulated by the voice signal multiplex transmission processing unit 15. Store and transmit to door phone terminal apparatus 2E. The video signal separated by the demultiplexing unit 17 is demodulated by the video signal processing unit 11, converted from a digital signal to an analog signal, and output to the monitor unit 12. In this way, a video signal is transmitted from the door phone terminal device 2E to the parent device 1, and a voice signal is transmitted bidirectionally between the door phone terminal device 2E and the parent device 1, thereby making a call. Note that the case where one of the other voice terminal devices 2A to 2D answers the call from the door phone terminal device 2E is basically the same as the extension call between the voice terminal devices 2A to 2D described in the first embodiment. Since this is an operation, the description is omitted.

  Thus, in this embodiment, since the voice terminal device (door phone terminal device) 2E is installed at the outside entrance of the dwelling unit H in place of the door phone slave unit 3, it is used only for calls with the door phone slave unit 3. Since the demultiplexing unit 11 and the terminal unit 10a are not required, the configuration of the base unit 1 can be simplified, and further, a telephone call (intercom call) inside and outside the dwelling unit H and a call (extension call) inside the dwelling unit H can be performed simultaneously. This has the advantage of improving usability. For example, in a so-called two-family house, assuming that a doorphone child unit is individually installed at the outside entrance of the parent household and the outside entrance of the child household, in Embodiment 1, during a call with one doorphone child unit, the other Although it is not possible to make a call with the door phone slave unit and to view an image captured by the other door phone slave unit, in the present embodiment, an image that is individually and simultaneously communicated and captured by each door phone terminal device 2E. Can be seen. Moreover, as described in the first and second embodiments, also in the door phone terminal device 2E that is the voice terminal device 2, when a wireless signal is received from the detection device 4, an alarm sound (voice message) can be sounded from the speaker 20b. it can.

  A camera unit 28 that outputs a digital video signal may be used as the camera unit 28 of the door phone terminal device 2E, and a monitor unit 12 that can input a digital signal may be used as the monitor unit 12 of the base unit 1. Since the imaging to display can be performed by so-called full digital, there is an advantage that deterioration due to analog and digital signal conversion is eliminated.

  Here, as shown in FIG. 5, by simply connecting the connector of the functional module 108 to the connection port of the gate device 103, the power path and the information path of the functional module 108 can be secured at the same time. There is a wiring system that can be connected also to the gate device 103 and is excellent in workability. In this wiring system, one or a plurality of switch boxes 102 embedded and disposed at appropriate positions in a building are provided, and a power line 110 and an information line 111 that are wired in advance in a wall surface between the switch boxes 102 are sent and wired. At the same time, with respect to the switch box 102 at the starting end, a field line 110 drawn indoors through the main breaker MB and the branch breaker BB drawn into the wiring board 101, and a gateway 120 ( Information line 111 connected via a router and a hub is connected. It is also possible to incorporate the audio transmission system according to the present invention into such a wiring system.

1 is a system configuration diagram showing Embodiment 1 of the present invention. It is operation | movement explanatory drawing at the time of the extension call in the same as the above. It is operation | movement explanatory drawing at the time of abnormality detection in Embodiment 2 of this invention. It is a system block diagram which shows Embodiment 3 of this invention. It is a system configuration diagram of a wiring system incorporating the same.

Explanation of symbols

1 Master unit (main unit)
2 Voice terminal device 4 Detection device 25 Control unit 28 Wireless signal reception unit 40 Detection unit 41 Wireless signal transmission unit

Claims (5)

One or more voice input terminal devices provided with at least voice input means for inputting voice, one or more voice output terminal devices provided with voice output means for outputting at least voice, voice input terminal devices, and voice output terminals A voice transmission system comprising: a main device connected to the device via a signal line; and a time division multiplexing transmission of a voice signal from the voice input terminal device to the voice output terminal device via the main device,
It has one or more detection devices installed indoors to detect abnormalities such as fires and intruders,
The detection apparatus includes detection means for detecting the abnormality, and wireless signal transmission means for transmitting a wireless signal for notifying abnormality detection when the abnormality is detected by the detection means,
The voice output terminal device includes wireless signal receiving means for receiving the wireless signal, and control means for outputting an alarm sound from the voice output means when the wireless signal receiving means receives the wireless signal. Voice transmission system. The voice output terminal device transmits a control signal between a voice signal receiving means for receiving a voice signal transmitted in a downlink time slot via the signal line and a main device via the signal line. A control signal transmission means, and a notification means for notifying the main device by a control signal that an abnormality has been detected when the wireless signal is received by the wireless signal receiving means,
The main apparatus receives an audio signal transmitted by an audio input terminal apparatus in an uplink time slot and transmits an audio signal to an audio output terminal apparatus in a downlink time slot; and the signal Control signal transmission means for transmitting a control signal to at least the voice output terminal device via a line, and when the abnormality detection is notified by the control signal, the warning sound is transmitted to the voice output terminal device. Control means for causing the audio signal transmitting / receiving means to transmit in a time slot of the direction,
2. The voice transmission system according to claim 1, wherein the voice output terminal device sounds the warning sound received by the voice signal receiving means from the voice output means.   The control unit of the main device causes the audio signal transmitting / receiving unit to transmit the warning sound in a downlink time slot to one or a plurality of audio output terminal devices other than the audio output terminal device that has notified the abnormality detection. The voice transmission system according to claim 2.   The control unit of the main device includes a group of one or more voice output terminal devices including the voice output terminal device that has notified the abnormality detection, and one or more other ones that do not include the voice output terminal device that has notified the abnormality detection. 4. The voice transmission system according to claim 3, wherein said voice signal transmitting / receiving means transmits a different alarm sound to each of said voice output terminal device groups. At least one of the plurality of audio input terminal devices or audio output terminal devices includes an imaging unit, a modulation unit that modulates video captured by the imaging unit, and a video signal modulated by the modulation unit as an audio signal Video signal transmitting means for transmitting in a frequency band different from the frequency band of
The main apparatus is a video signal receiving means for receiving the video signal transmitted by the audio input terminal apparatus or the audio output terminal apparatus, a demodulating means for demodulating the video signal received by the video signal receiving means, and demodulated by the demodulating means. The audio transmission system according to claim 1, further comprising display means for displaying an image.

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