JPH09154129A - Video interphone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a corresponding video camera slave set and to allow a master set speaker to sound a call tone when a call is received from the video camera slave set even during automatic scanning. SOLUTION: In the automatic scanning mode, intermittent control signals f1 , f2 are respectively applied to transistors(TRs) Q1 -Q8 corresponding to video camera slave sets SQ1 -SQ2 making automatic scanning and a master set controller 3 to allow display lamps D1 -D8 corresponding to the video camera slave sets SQ1 -SQ8 to be blinked. When a call comes from any of the video camera slave sets SQ1 -SQ8 , the call tone is intermittently sounded from a master set speaker 1 and the display lamps D1 -D8 are lighted via the display lights D1 -D8 and the master set controller 3 to which the intermittent control signals are applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television intercom apparatus, and in particular, even during an automatic scan, if there is a call from a TV camera slave unit, the corresponding TV camera slave unit is detected and a ringing sound is output from a master speaker. The present invention relates to a TV intercom device capable of ringing.

[0002]

2. Description of the Related Art Conventionally, a television intercom apparatus shown in FIG. 3 has been proposed. This TV intercom apparatus includes a counter intercom base unit EQ ₁₁ , a counter intercom video adapter AD ₁₁ , a plurality of intercom slave units with cameras SQ _{11 to} SQ ₁₈ (the number of intercom slave units with camera is 8) and a television. It has a monitor MQ ₁₁ , and the counter intercom base unit EQ ₁₁ and the counter intercom video adapter AD ₁₁ are cables L _{21 to} L _28.
And a call stop cable L ₂₉ , the counter intercom video adapter AD ₁₁ and the intercom slaves with cameras SQ _{11 to} SQ ₁₈ are cables L _{31 to} L ₃₈ , and the counter intercom video adapter AD ₁₁ and the TV monitor MQ ₁₁ are cable L _39. , L ₄₀ , respectively.

The counter intercom master unit EQ ₁₁ includes call indicator lights D _{21 to} D ₂₈ , a master unit speaker 51, an amplifier 52,
It has a master unit controller 53, and the anodes of the call indicators D _{21 to} D ₂₈ are connected to the control input side of the master unit controller 53. The cathodes of the call indicators D _{21 to} D ₂₈ are resistors R _{21 to} R _28.
Is connected to the terminal T ₂₁ through T ₂₈ via a terminal T ₂₁ through T ₂₈ are respectively connected to the cable L ₂₁ ~L _28.

The ring back tone control terminal T ₂₉ connected to the control input side of the master unit control device 53 is connected to the ring back tone control cable L ₂₉ . The counter intercom video adapter AD ₁₁ is a buffer drive circuit 54 provided with transistors Q _{31 to} Q ₃₈ , a call detection circuit 55, a doorphone signal line switching circuit 56, a camera power supply circuit 57, a monitor voice on / off control circuit 58, a monitor voice amplifier. The terminals T _{31 to} T ₃₈ of the counter intercom video adapter AD ₁₁ which includes a cable 58 a, a monitor speaker 58 b, a television monitor unit control circuit 59, a monitor switch K ₁₁ and an adapter control device 60 and to which cables L _{21 to} L ₂₈ are connected are Buffer drive circuit 5
4 through the resistors R _{31 to} R ₃₈ provided in the transistor Q.
The collectors of _{31 to} Q ₃₈ are respectively connected, and the emitters of the transistors Q _{31 to} Q ₃₈ are connected to the reference potential point.

[0005] base of the transistor Q ₃₁ to Q ₃₈ is connected to the call pin P ₁₁ to P1 ₈ of the adapter controller 60, ringer control pin P ₁₉ of the adapter control unit 60 is connected ringer control cable L ₂₉ is It is connected to the ring back tone control terminal T ₃₉ . The other end of the monitor switch K ₁₁ , one end of which is connected to the reference potential point, is connected to the monitor switch reception pin P ₂₆ of the adapter control device 60, and the call detection pins P 21-1 to P ₂₁
Control output side of the call detection circuit 55 is connected to the _{21-1 8.}

The intercom signal control pin P ₂₂ of the adapter controller 60 is connected to the control input side of the intercom signal line switching circuit 56, and the camera power control pin P ₂₃ is connected to the control input side of the camera power circuit 57. The monitor voice on / off control pin P ₂₄ is connected to the control input side of the monitor voice on / off control circuit 58, and the output side of the monitor voice on / off control circuit 58 is connected to the monitor speaker 58b via the monitor voice amplifier 58a. Has been done.

The television monitor control pin P ₂₅ is connected to the control input side of the television monitor control circuit 59, and the output side of the television monitor control circuit 59 is connected to the terminal TA ₂₀ of the counter intercom video adapter AD ₁₁ . The terminal TA ₂₀ is connected to the TV monitor MQ ₁₁ via the cable L _40, television monitor MQ ₁₁ is connected to the terminal TA ₁₉ via the cable L _39.

The terminal TA ₁₉ is connected to the video output side of the intercom signal line switching circuit 56. Cable L ₃₁ ~L ₃₈ of the camera-equipped intercom slave unit SQ ₁₁ ~SQ ₁₈ are connected is connected to the terminal TA ₁₁ to Ta ₁₈ counter interphone video adapter AD _11, terminals TA ₁₁ ~
TA ₁₈ is connected to the call detection side of the call detection circuit 55 and the slave side of the intercom signal line switching circuit 56, respectively.

[0009] In such a television interphone apparatus, for example when the call takes from camera-equipped intercom slave unit SQ _11, cable L _31, terminal TA ₁₁ counter interphone video adapter AD _11, call detection circuit 55, the adapter control unit 60 via the call detection pin P _{21 -1} indicating that there was a call from the camera-equipped intercom slave unit SQ ₁₁ to the adapter control unit 60.

When the adapter controller 60 recognizes that there is a call from the intercom slave unit with a camera SQ ₁₁ , it controls the transistor Q ₃₁ provided in the buffer drive circuit 54 via the call pin P ₁₁ . When the transistor Q ₃₁ operates by this control, the cable L ₂₁ is connected to the reference potential point via the emitter and collector of the transistor Q ₃₁ connected to the reference potential point, the resistor R ₃₁ , and the terminal T ₃₁ .

When the cable L ₂₁ is connected to the reference potential point, the call indicator light D of the counter intercom base unit EQ1 _1
21 lights up. At the same time, the adapter control device 60 provided in the counter intercom video adapter AD ₁₁ has a ring tone control pin P ₁₉ , a ring tone control terminal T ₃₉ , a ring tone control cable L _29, and a ring tone control terminal T of the counter intercom master unit EQ _{11. The} parent device control device 53 is controlled via ₂₉ . With this control, the counter intercom base unit EQ
The master device control device 53 of ₁₁ controls the amplifier 52, and the master device speaker 51 sounds.

Counter intercom video adapter AD
_When the monitor switch K ₁₁ of ₁₁ is pressed for about 2 seconds, the auto scan mode is set. When in the auto scan mode, the camera power supply circuit 57 is controlled via the camera power supply control pin P ₂₃ of the adapter control device 60. When the camera power supply circuit 57 is operated by the control, the doorphone signal line switching circuit 56 is operated by the control by the doorphone signal control pin P ₂₂ , and the intercom slave unit SQ with camera is operated via the sequentially switched cables L _{31 to} L _38. Camera power is supplied to _{11 to} SQ ₁₈ .

Intercom subunits with camera SQ _{11 to} SQ ₁₈
When the camera power is supplied to the video captured by the camera-equipped intercom slave unit SQ ₁₁ ~SQ ₁₈ it is sent from the video output side of the intercom signal line switching circuit 56 to the terminal TA _19. The TV monitor MQ ₁₁ is a TV monitor control pin P.
It is in a monitor state by the television monitor control circuit 59 controlled via ₂₅ .

Also, the monitor voice on / off control pin P ₂₄
Monitor sound on-off control circuit with a monitor speaker 58b camera through sequentially turned-on monitor sound amplifier 58a by 58 interphone handset SQ ₁₁ controlled by
~ Output the audio signal from SQ ₁₈ . Adapter controller 60 from the call pin P ₁₁ to P ₁₈ at the same time that the switched sequentially switching the intercom signal line switching circuit 56, controls the transistor Q ₃₁ to Q _38, which is provided to the buffer driver circuit 54.
At the same time, the adapter control device 60 causes the ringing tone control pin P
_{From 19} the master control device 53 of the counter intercom master EQ ₁₁ controls so as not to output the ringing tone. Check This gives some counter interphone parent device EQ camera interphone handset SQ ₁₁ is scanned in ₁₁ ～SQ call indicator D2 ₁ to D ₂₈ corresponding to the ₁₈ lights, intercom slave unit with which camera is being scanned it can.

[0015]

In the conventional TV intercom apparatus, the auto scan mode (the master speaker 51 of the counter intercom master EQ ₁₁ does not ring).
Even if the intercom slaves with cameras SQ _{11 to} SQ ₁₈ are called, the ringing tone does not ring because the adapter controller 60 controls the parent unit controller 53 so as not to output the ringing tone.

Although the call indicators D _{21 to} D ₂₈ are turned on by calling, it cannot be distinguished whether they are turned on by automatic scanning or by calling. The present invention has been made in order to eliminate such a conventional defect, and even if a call is made from a camera-equipped intercom handset even during an automatic scan, the corresponding TV camera handset is detected and a base unit is detected. An object of the present invention is to provide a TV intercom device capable of emitting a ringing sound with a speaker and displaying a display of a ringing indicator light by lighting or blinking, and distinguishing whether a call is made from a camera-equipped intercom handset or is automatically scanned. .

[0017]

In order to achieve such an object, a TV intercom apparatus according to the present invention connects a plurality of TV camera slave units to a counter intercom master unit and a TV monitor unit via an adapter, and the adapter is , When there is a call from any of a plurality of TV camera slaves via the call detection circuit, it corresponds to a plurality of TV camera slaves by a call display / ring sound drive circuit. The video signal line switching circuit when the auto scan switch is pressed when the call indicator light is turned on via the master unit control device and the call tone is emitted from the master unit speaker via the call indicator light and the master unit control device. To switch the multiple TV camera slave units to the TV monitor unit and monitor the video from the TV camera slave units. A TV intercom device equipped with an adapter control device, the adapter control circuit is compatible with TV camera slave units that are automatically scanning when the auto scan switch is pressed to automatically scan multiple TV camera slave units. Call display / ring sound A intermittent control signal is applied to the drive circuit and master unit control device to display the flashing call indicator lamp for the TV camera slave unit that is auto-scanning, and multiple auto scan switches are pressed. When a call is made from any of a plurality of TV camera slaves via the call detection circuit during automatic scanning of the TV camera slaves, the call indicator light corresponding to the called TV camera slave And the intermittent control signal is applied to the master unit to intermittently make a ringing sound from the master speaker. And it includes a control signal generating means.

In this television intercom apparatus, when there is a call from any of a plurality of TV camera slave units via the call detection circuit, the corresponding call display / ring tone drive circuit causes the corresponding call display lamps to operate. Lights up under the control of the machine controller. At the same time, a ringing tone is emitted from the master unit speaker via the ringing indicator light and the master unit controller. When the auto scan switch is pressed, the video signal line switching circuit is driven to sequentially switch the plurality of television camera slave units to the television monitor unit and monitor the image from the television camera slave unit.

In this auto scan mode, the call display / ring tone drive circuit corresponding to the TV camera slave unit and the call control corresponding to the TV camera slave unit automatically scanning by applying the intermittent control signal to the master unit control device, respectively. The indicator light blinks, and when there is a call from any of the TV camera slave units via the call detection circuit, the intermittent control signal generation circuit turns on the call indicator light of the corresponding TV camera slave unit, and A ringing tone is intermittently emitted from a master unit speaker via the master unit control device.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a television intercom apparatus according to the present invention will be described in detail below with reference to the drawings. The television intercom apparatus according to the present invention, as shown in FIG.
A plurality of TV camera slave units slave units SQ _{1 to} SQ ₈ are connected via a counter intercom image adapter AD ₁ to a counter intercom master unit EQ ₁ and a television monitor unit MQ _1.
Connect to the counter intercom video adapter AD ₁
Is set to the buffer drive circuit 4 corresponding to each of the plurality of television camera slave units SQ _{1 to} SQ ₈ when there is a call from any of the plurality of television camera slave units SQ _{1 to} SQ ₈ via the call detection circuit 5. the call indicator D ₁ to D ₈ of the transistor Q ₁ to Q ₈ which are provided corresponding each of the plurality of Terebikamerako machine SQ ₁ ~SQ ₈ lights via the base unit controller 3,
In addition, a ringing sound is emitted from the master speaker 1 via the call indicator and the master controller 3, and when the auto scan switch K ₁ is pressed, the video signal line switching circuit 9 is driven to drive a plurality of television camera slave units. SQ _{1 to} SQ ₈ are sequentially switched to the TV monitor unit MQ ₁ , and the TV camera slave unit SQ ₁
~ The monitor audio on / off control circuit 8 for monitoring the video from SQ ₈ is provided.
Buffer drive provided with transistors Q ₁ to Q ₈ corresponding to the television camera slave unit is depressed auto scan switch K ₁ is auto scan while auto scan multiple Terebikamerako machine SQ ₁ ~SQ ₈ Intermittent control signals f ₁ and f ₂ are applied to the circuit 4, the monitor voice on / off control circuit 8 and the master unit control device 3, respectively, so that the ringing indicator light corresponding to the TV camera slave unit which is automatically scanning is displayed in a blinking manner. , When the auto scan switch is pressed to automatically scan a plurality of TV camera slave units SQ _{1 to} SQ ₈ , when a call is made from any of the plurality of TV camera slave units via the call detection circuit 5. The ringing sound from the master unit speaker 1 via the master unit control device to which the ringing indicator light corresponding to the called TV camera slave unit and the intermittent control signal are applied. Intermittent control signal generation circuit 1 for intermittently ringing
9 is provided.

The counter intercom base unit EQ ₁ and the counter intercom video adapter AD ₁ are connected to the cables L ₁ to
L ₈ and ringing tone control cable L ₉ are connected, and the counter intercom video adapter AD ₁ and the TV camera slave unit S are connected.
Q ₁ ~SQ ₈ (and 8 a number of television cameras handset for explanation) cable L ₁₁ ~L _18, counter interphone video adapter AD ₁ and the television monitor MQ ₁ cable L _19,
They are connected by L ₂₀ respectively.

Counter intercom base unit EQ₁Call
Output indicator D₁~ D₈, Base unit speaker 1, amplifier 2, base unit system
It has a control device 3 and a call indicator₁~ D₈The anode of the base unit
It is connected to the control input side of the control device 3. Call indicator light
D₁~ D₈The cathode of the resistor R ₁~ R₈Through terminal T₁~
T₈Connected to the terminal T₁~ T₈Is the cable L₁~ L₈Toso
It's connected.

The ring back tone control terminal T ₉ connected to the control input side of the master unit control device 3 is connected to the ring back tone control cable L ₉ . Counter intercom video adapter AD
₁ is a buffer drive circuit 4 provided with transistors Q _{1 to} Q ₈ , a call detection circuit 5, an intercom signal line switching circuit 6,
Camera power circuit 7, monitor audio on / off control circuit 8,
The terminal T of the counter intercom video adapter AD ₁ which has the monitor audio amplifier 8 a, the monitor speaker 8 b, the television monitor unit control circuit 9, the monitor switch K ₁ and the adapter control device 11 and to which the cables L _{1 to} L ₈ are connected.
_{11 to} T ₁₈ are resistors R ₁₁ to R provided in the buffer drive circuit 4.
Through R ₁₈ are respectively connected to the collector of the transistor Q ₁ to Q _8, the emitter of the transistor Q ₁ to Q ₈ is connected to the reference potential point.

The bases of the transistors Q _{1 to} Q ₈ are connected to the ringing pins P _{1 to} P ₈ of the adapter controller 11, and the ringing tone control pin P ₉ of the adapter controller 11 is connected to the ringing tone control cable L _9. It is connected to the ringing tone control terminal T ₉ . The monitor switch receive pin P ₁₆ of the adapter control unit 11 is connected the other end of the monitor switch K ₁ whose one end is connected to a reference potential point, call detection circuit for call detection pin P _{11 over 1} to P _{11 over 8} The control output side of 5 is connected.

The intercom signal control pin P ₁₂ of the adapter controller 11 is connected to the control input side of the intercom signal line switching circuit 6, and the camera power control pin P ₁₃ is connected to the control input side of the camera power circuit 7. The control output side of the camera power supply circuit 7 is connected to the power supply input side of the intercom signal line switching circuit 6. The control input side of the monitor voice on / off control circuit 8 is connected to the monitor voice on / off control pin P _14, and the output side of the monitor voice on / off control circuit 8 is connected to the monitor speaker 8 via the monitor voice amplifier 8a.
b is connected.

The control input side of the TV monitor control circuit 9 is connected to the TV monitor control pin P _15, and the output side of the TV monitor control circuit 9 is connected to the terminal TA ₁₀ of the counter intercom video adapter AD ₁ . This terminal TA
₁₀ is connected to the TV monitor MQ ₁ via the cable L _20, terminal T via the television monitor MQ ₁ cable L ₁₉
It is connected to A ₉ .

The terminal TA ₉ is connected to the video output side of the intercom signal line switching circuit 6. TV camera slave S
Cables L _{11 to} L to which Q _{1 to} SQ ₈ are respectively connected
₁₈ is connected to the terminals TA _{1 to} TA ₈ of the counter intercom video adapter AD _{1, and} the terminals TA _{1 to} TA ₈ are the call detection side of the call detection circuit 5 and the intercom signal line switching circuit 6
It is connected to the intercom side of each.

The adapter control device 11 includes a master unit call indicator light control circuit 12, a calling slave unit number input circuit 13, a slave unit line switching circuit 14, a camera power ON / OFF control circuit 15, and a monitor voice ON / OFF control circuit 16. , Counter master ringing tone on / off control circuit 17, monitor unit on / off control circuit 18, auto scan control circuit 19, monitor switch on time detection circuit 20 are provided, and control output of master unit ringing indicator light control circuit 12 is provided. The sides are connected to calling pins P _{1 to} P ₈ , respectively.

The input side of the Yobidashiko machine number input circuit 13 call detection pin P _{11 over 1} to P _{11 over 8} is connected, the output side of the Yobidashiko machine number input circuit 13 and the base unit calls the display lamp control circuit 12 It is connected. The control output side of the auto-scan control circuit 19 is a master unit call indicator light control circuit 12 and a slave unit line switching circuit 1.
4, camera power ON / OFF control circuit 15, monitor voice ON / OFF control circuit 16, counter master ringer ON / OFF control circuit 17 and monitor unit ON / OFF control circuit 18
Is connected to the control input side thereof, and the output side of the slave unit line switching circuit 14 is connected to the intercom signal control pin P ₁₂ .

The output side of the camera power ON / OFF control circuit 15 is connected to the camera power control pin P ₁₃ , and the monitor audio ON / OFF control circuit 16 is connected to the monitor voice ON / OFF control pin P _14. There is. The output side of the monitor unit ON / OFF control circuit 18 is connected to the TV monitor control pin P _15, and the counter master unit ringing tone ON / OFF control circuit 17 is connected.
The output side of is connected to the ring control pin P ₉ .

The monitor switch receiving pin P ₁₆ is connected to the control input side of the auto scan control circuit 19 via the monitor switch on-time detection circuit 20. The operation of the terminal in such a TV intercom apparatus is shown in FIG. When the monitor switch K ₁ shown in FIG. 1 is pressed for about 2 seconds, the monitor switch on-time detection circuit 20 operates and the autoscan control circuit 19 starts the autoscan control to enter the autoscan mode.

For example, when the intercom signal line switching circuit 6 is switched to the terminal TA ₁ and the television camera slave unit SQ ₁ is in the auto scan mode, the base unit calling indicator lamp control circuit 12 causes the transistor Q provided in the buffer drive circuit 4. ringer stops intermittently control signals f ₂ to intermittently control signal f ₁ to ₁ is outputted is synchronized with the intermittent control signal f ₁ at the same time is sent from the counter base unit ringer on. oFF control circuit 17 to the counter intercom master unit EQ ₁ . Call indicator D ₁ of the counter intercom master unit EQ ₁ in this state has become a flash. (FIG. 2) At this time, the intermittent control signal f ₁ and the ringing tone stop intermittent control signal f ₂
Are synchronized with each other, the master unit control device 3 determines that the call indicator D ₁
The ringing stop control is performed while the
_{While 1} is off, the ringing tone is controlled to be ringable. Therefore, the ringing tone generated by the intermittent control signal f ₁ is not transmitted.

When a call is made from another TV camera slave unit SQ ₂ during the automatic scan (FIG. 2), the call detection circuit 5
Then, the caller handset number input circuit 13 informs the base unit call indicator light control circuit 12 that there is a call from the television camera handset SQ ₂ . The base unit call indicator light control circuit 12 of the adapter controller 11 outputs a lighting control signal to the transistor Q ₂ provided in the buffer drive circuit 4 (in FIG. 2), and the call indicator light D ₂ is turned on.

At this time, since the ringing indicator light D ₂ is lit while the ringing tone stop / intermittent control signal f ₂ is transmitted, the master unit control device 3 operates the amplifier 2 to intermittently ring the speaker 1. . (In Figure 2)

[0035]

As is apparent from the above description, according to the TV intercom apparatus of the present invention, a plurality of TV camera slave units are connected to the counter intercom master unit and the TV monitor unit via the adapters, and the adapters are: When there is a call from any of a plurality of TV camera slaves via the call detection circuit, a call display / ring tone drive circuit corresponding to each of the plurality of TV camera slaves corresponds to each of the plurality of TV camera slaves. When the auto scan switch is pressed down, the video signal line switching circuit is activated when the call indicator light is turned on via the master unit control device and the call tone is output from the master unit speaker via the call indicator light and master unit control device. Driven to sequentially switch a plurality of TV camera slave units to a TV monitor unit to monitor the video from the TV camera slave units. In the television intercom device including the projector control device, the adapter control device corresponds to the television camera slave device that is automatically scanning when the auto scan switch is pressed to automatically scan a plurality of television camera slave devices. Intermittent control signals are applied to the ringing display / ringing tone drive circuit and the master unit control device, respectively, and the ringing indicator light corresponding to the TV camera slave unit that is auto-scanning is displayed in blinking. When auto-scanning a TV camera slave unit, when there is a call from any of the TV camera slave units via the call detection circuit, a call indicator light corresponding to the called TV camera slave unit and An intermittent control signal that causes a ringing sound to be intermittently emitted from the master unit speaker via the master unit control device to which the intermittent control signal is applied. Since it is equipped with a generator, if a call is made from a TV camera slave unit even during automatic scanning, the corresponding TV camera slave unit can be detected and a ringing sound can be sounded from the master unit speaker. Is displayed by lighting or blinking, and it can be distinguished whether the TV camera slave unit is calling or is being automatically scanned.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a television intercom apparatus according to the present invention.

FIG. 2 is an operation diagram of the TV intercom apparatus according to the present invention.

FIG. 3 is a block diagram of a conventional television intercom apparatus.

[Explanation of symbols]

1 ・ ・ Parent speaker 3 ・ ・ ・ ・ ・ ・ Parent controller 5 ・ ・ ・ ・ Call detection circuit 9 ・ ・ ・ ・ Video signal line switching circuit 11 ・ ・ ・ ・ ・ ・Adapter control device 19 --- Auto scan control circuit (intermittent control signal generating means) SQ _{1 to} SQ ₈ --- TV camera slave unit EQ ₁ --- counter intercom master unit MQ ₁ ··· TV monitor unit AD ₁ ··· Counter intercom video adapter (adapter) Q _{1 to} Q ₈ ··· Transistor (ring display / ring tone drive circuit) D _{1 to} D ₈・ ・ ・ ・ Ring indicator K ₁・ Auto-scan switch f ₁・ ・ Intermittent control signal f ₂・ ・ Interruption control signal for ringing tone stop (intermittent control signal)

Claims (1)

[Claims] 1. A plurality of Terebikamerako machine (SQ ₁ ~SQ ₈₎
Is connected to a counter intercom master unit (EQ ₁ ) and a TV monitor unit (MQ ₁ ) via an adapter (AD ₁ ), and the adapter detects a call detection circuit (5) from any one of the plurality of TV camera slave units. When there is a call via the call display / ring tone drive circuits (Q _{1 to} Q ₈ ) respectively corresponding to the plurality of TV camera slave units, the call indicator lights (Q _{1 to} Q ₈ ) respectively corresponding to the plurality of TV camera slave units are provided. D
_{1 to} D ₈ ) are turned on via the master unit control device (3), and a ringing tone is sounded from the master unit speaker (1) via the call indicator lamp and the master unit control device, and an auto scan switch ( When K ₁ ) is pressed, the video signal line switching circuit (9) is driven to sequentially switch the plurality of TV camera slave units to the TV monitor unit and monitor the video from the TV camera slave unit. (11) A television intercom device including: a television camera slave device, wherein the adapter control device is automatically scanning when the auto scan switch is pressed to automatically scan the plurality of television camera slave devices. auto scan by applying respectively the intermittent control signal (f _1, f ₂₎ in the call display and ring tone driving circuit and the base unit controller corresponding to One of the plurality of TV camera slave units when the call indicator light corresponding to the TV camera slave unit is blinkingly displayed and the auto scan switch is pressed to automatically scan the plurality of TV camera slave units. When a call is made via the call detection circuit, a call indicator light corresponding to the called TV camera slave unit and the master unit control device to which the intermittent control signal is applied A television intercom device comprising an intermittent control signal generating means (19) for intermittently emitting a ringing sound from a speaker.