JPH0231551A - Doorphone - Google Patents

Abstract

PURPOSE:To cope with visitors when the user of the title doorphone is away home for a long period or has an urgent matter to do by automatically recording the message picture of the visitor and reading out the recorded content to another telephone set through a public circuit. CONSTITUTION:A call button 9, voice input means 8, picture input means 100, and means which accumulates and sends input picture information are provided on a slave set 5 and a means which records input voice and picture information sent from the slave set 5, means which detects an incoming call from a connected public circuit 61, which is actuated by the detection of an incoming cal and responds to the circuit, and means which reads out and sends to the circuit the stored input voice and picture information from the slave set 5 after the above-mentioned means responds to the circuit are provided on a host set 1. Therefore, even when a visitor visits the house of a user while the user is absent, the user can hear the message of the visitor while watching the picture of the visitor through the public circuit 61.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a door phone that is connected to a public telephone line and allows messages and images from visitors to be read out by other telephones.

[Background Art] Due to recent advances in semiconductor technology, door intercoms have become widespread in ordinary households.

However, conventional doorbells simply press the call button on the handset to emit a chime or other ringing sound in the residence to notify the visitor that there is a visitor. This allows communication between the base unit and the slave unit.

A block diagram of this conventional door phone is shown in FIG.

In the figure, 1 is a mother machine, and 5 is a slave machine. Mother unit 1 and child unit 5
and are connected to each other via an interface signal line 16. A power supply output and an input/output signal superimposed thereon are transmitted to this interface signal line 16.

On the slave device 5 side, power from the mother device 1 is supplied to the coil 12 via the interface signal line 16, and the coil 12
The signal is sent to the power supply extraction circuit 15 via. The voltage is then made into a constant voltage by a power supply extraction circuit 15, and supplied to each amplifier section via a power supply line (not shown). When the call button 9 is input, the signal line 16 is grounded through the resistor 14, and thereby the mother machine 1 is notified of the input of the call button 9. Further, the audio signal inputted from the microphone 8 of the slave unit 5 is amplified by the amplifier 11, superimposed on the signal line 16, and sent to the base unit 1 side. The audio signal superimposed on the signal line 16 from the base unit 1 is sent to the amplifier via the coil 13, where it is amplified and output as sound from the speaker 7.

On the other hand, on the mother machine 1 side, the power output from the power supply circuit 30 is sent via a parallel circuit of a resistor 26 and a switch 25 to the collector of an NP, N)-transistor 18 for output superimposition. The collector and base of this transistor 26 are connected through a resistor 19, and the base is grounded through a Zener diode 20 and a resistor 21.

The audio signal from the microphone 24 on the mother unit 1 side is sent to the contact between the resistor 21 and the Zener diode 20 via the amplifier 23 and the capacitor 22, and is supplied to the base of the transistor 18. As a result, the audio signal is superimposed on the power output from the power supply circuit 30 and sent to the handset 5 via the coil 17 and the interface signal line 16. On the handset 5 side, the audio signal of this superimposed signal is amplified by the amplifier 10 and output as sound from the speaker 7. Further, 28 is a bell comparator for detecting a pressing operation of the call button 9 of the handset 5. A constant level reference voltage obtained by dividing the output constant voltage from the power supply circuit 30 by a resistor is applied to the reference voltage input terminal of the level comparator 28, and a resistor is applied to the other input terminal of the level comparator 28. 26 and the collector of the transistor 18 are connected to each other.

In a steady state, power is supplied from the power supply circuit 30 to the handset 5 through the resistor 26, and the power sent is a minute current. Therefore, the circuit section of each handset 5 is in a non-operating state.

At this time, when the switch 9 is turned on in response to the press operation of the call button 9, the voltage of the interface signal return line 16 is converted to the ground potential side. The level comparator 28 detects this and outputs a detection pulse. The chime generating circuit 29 is triggered by this detection signal and outputs a chime sound for a certain period of time.

The microphone 24 on the mother unit 1 side is detachable from the hook, and when the microphone 24 is not removed from the hook (
When on-hook), the switch 25 is in an off state, and the switch 31 is connected to the "b" side, which is the chime sound generation circuit 29 side. Therefore, when the call button 9 is pressed, the chime sound from the chime sound generation circuit 29 is output as a notification sound from the speaker 27 via the amplifier 32, and is notified to the resident. When the resident hears this chime sound and removes the microphone 24 from the hook (off-hook), the switch 25 is closed and the slave unit 5 is directly connected via the switch 25 without the resistor 26. A large current is supplied. Therefore, each circuit on the handset 5 side becomes operational. At the same time, the switch 31 is
The audio signal from the microphone 8 of the handset unit 5 is sent to the base unit 1 side from the signal line 16 via the amplifier 11, amplified by the amplifier 32, and output as audio from the speaker 27. You can check people's voices.

[Problem to be solved by the invention] However, although the above-mentioned device can respond when someone is present at home, it cannot respond at all when someone is absent. If you are away from home, record messages from visitors on magnetic tape, etc., so that you can check the messages when you return home.
There is a device configured to record the face of a visitor on a VTR 1 or semiconductor memory using a television camera, and then reproduce the recorded image after returning home to confirm the identity of the visitor.

However, in this case as well, although the visitor can be confirmed later, the user cannot know that there was a visitor at all until he or she returns home. For this reason, when people go out for a long time or when they have visitors who are nervous, they are not used properly, which can lead to serious problems.

[Means for Solving the Problems] The present invention has been made for the purpose of solving the above-mentioned problems, and as a means for solving the problems, an embodiment according to the present invention has the following configuration.

In other words, it is a doorbell consisting of a base unit connected to a public telephone line and a handset placed at a calling position. an audio output means for inputting image information, an image input means for inputting image information, an accumulation means for accumulating image information input by the image input means, and a sending means for transmitting the image information accumulated in the accumulation means to a base device. an output means that is activated by inputting a call button of the handset and outputs pre-stored specific audio information to the handset; and a record that records input audio information and image information sent from the handset. means, called detection means for detecting an incoming call from a connected public line, response means activated by the call detection means to respond to the line, and said storage means after the answering means responds. and transmitting means for transmitting the input audio information and image information from the handset stored in the slave unit to the reading line.

[Operation] With the above configuration, even if there is a visitor when you are not present, you can use the public line to view the image of the visitor who visited you when you were absent.
At the same time, you can listen to messages from visitors.

[Example] Hereinafter, an example according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment according to the present invention, and the same components as in FIG. 4 are given the same reference numerals and detailed explanations will be omitted.

The configuration of the handset 5 is the same as that shown in FIG. 4, and includes a power extraction circuit 15 and a coil 12 supplied from the base unit 1, a speaker 7, a microphone 8 that converts the visitor's voice into an electrical signal, a call button 9, Consisting of amplifiers 10 and 11, it further includes a video camera 100 that inputs visitors, an amplifier 101 that amplifies the photographing signal which is an analog image signal of the camera 100, and an A/D converter 1 that converts the analog image signal into digital.
02, memory controller 103, memory 104, D/A converter 105 for converting digital signals into analog, modulator 106 for superimposing image signals on signal lines, CPU
The controller 107 includes a controller 107, and a demodulator 108 for demodulating data superimposed on a signal line.

In the configuration of the mother machine 1 side, the configuration common to that in Fig. 4 is as follows.
Power supply circuit 3 that supplies power to each component in the base machine 1
0, a resistor 26 for supplying only a minute current from the circuit 3o to the slave unit 5, a switch 25b corresponding to the switch 25 in FIG. 4 for supplying a relatively large current to the slave unit 5, and a switch 25b on the mother unit side. A microphone 24, an amplifier 23, a transistor 18, and a resistor 19.21 that converts the voice of the person responding to the call into an electrical signal.
, a Zener diode 20, and a capacitor 22, and further includes a comparator 28, a chime sound generating circuit 29, a switch 31b corresponding to the switch 31 in FIG. 4, a speaker 27, and an amplifier 32. . The microphone 24 and speaker 27 are incorporated into an integrated handset 2, which will be described later.

In addition to the configurations similar to those shown in FIG. 4, this embodiment includes the following configurations.

That is, the controller 40 controls the entire embodiment according to the program stored in the built-in ROM 41, for example, as shown in FIG. 3, and stores various parameters used in the embodiment in addition to the above-mentioned program. ROM4
1. Resident comment storage unit 42 that stores resident messages to be output to visitors;
DTM that detects lti frequency) signal
F signal detector (line tone detector) 43, password storage section 44 that stores password information for reading messages recorded in the audio/image recording/playback section 47, called signals from the lines LL and L2. a called detector 45 for detecting;
The destination telephone responds, and the line L1. A response detection circuit 46 detects whether or not the polarity of L2 has been reversed, and the audio information input by the visitor through the microphone 8 of the handset 5 and the image information input from the video camera 100 are recorded and can be read out in accordance with a readout request. The audio/image recording/playback section 47 is provided.

Regarding image information, a demodulator 109 for demodulating the image information modulated and sent from the handset 5, an A/D converter 123 for converting the demodulated analog image signal into a digital signal, a memory, and a controller. Memory section 1 consisting of
24, an amplifier 121 that amplifies the image signal from the memory section 124, and a monitor 122 that outputs the image signal from the amplifier 121 for visible display. Also, a modulator 110 performs modulation processing to transmit image information from the audio/image recording/reproducing section 47. Controller 10 of slave device 5 from CPU 40
7, a modulator 111 is provided for sending out a control code.

Further, a flip-flop 48 that latches the output of the comparator 28 that detects the press input of the call button 9 of the handset 5 and notifies the controller 40 of the input of the call button 9, various mode setting switches 49, buffers 50 and 51, and a transformer. 52, Keyboard (numeric keypad) used for entering passwords, telephone number signals, etc. 53, Voice signals are transmitted to line Ll,
A switch 54 that controls whether or not to send to L2, a slave unit 5
A switch 55 that controls whether or not input audio information or image information is input to the audio/image recording/playback section 47.
, a switch 123 for selecting whether to input audio information or image information to the audio/image recording/playback section 47;
a switch 120 for selecting whether to input the audio information to the monitor 122 or to send it to the monitor 122 for display;
A switch 56 is used to select whether to output either the audio information from the resident comment storage unit 42 selected by 7 or the audio or image information from the audio/image recording/playback unit 47 to the amplifier 23. Audio information or audio/image records from the resident comment storage unit 42
A switch 57 for switching whether to output audio or image information from the reproduction section 47 or a control code from the CPU 40, a switch 58 for switching whether to output a message to be recorded in the resident comment storage section 42, and a handset 2. The hook switch 59 detects whether the hook has been taken up from the hook (off-hook).

The mode setting switch 49 includes an absent mode setting switch 49a for setting the normal doorphone mode or the absentee mode, a comment setting switch 49b for setting the mode for storing comments to be output to the resident comment storage section 42, and a keyboard 53. and a password setting switch 49c for setting a mode for registering a password in the password storage section 44.

FIG. 2 shows an external view of this embodiment having the above configuration.

In FIG. 2, 1 is a mother unit, 5 is a child unit placed outdoors, etc., and these devices are connected by an interface signal line 16.

As shown in the figure, a line 61 is connected to the base unit 1, and a handset 2 has a built-in microphone 24 and speaker 27.
is placed on the hook. The base unit 1 is provided with a pushbutton 53, an absence mode key 49a, a comment setting key 49b, and a password setting key 49c, which are mode switching keys.

The operation of this embodiment with the above configuration is shown in FIGS.
This will be explained below with reference to (E).

FIG. 3(A) is a control flowchart in the normal doorbell mode, that is, when the absence mode setting switch 49a is "off", and FIG. 3(B) is the control flowchart in the absence mode, that is, when the absence mode setting switch 40a is "on". Flowchart, FIG. 3(C) shows the audio/image recording/playback section 4 using the telephone line
FIG. 3(D) is a message read mode control flowchart for reading out the message recorded in 7, FIG. 3(D) is a comment storage mode control flowchart for updating the comment storage in the resident comment storage section 42, and FIG. 4 is a password registration mode control flowchart for performing nominal word registration processing in the unit 44;

First, the door phone mode operation will be explained with reference to FIG. 3(A).

When the absence mode setting switch 49a is reset, the controller 40 is processing the doorphone mode.
In step S1, initial processing in doorphone mode is executed. That is, switch 31b is connected to "C", and switch 2
5b and switches 54 and 55 to “off” switch 56
are respectively set on the microphone 24 side, and the flip-flop 4
Reset 8. Next, in step S2, the call button 9 of the handset 5 is pressed, and the comparator 28 detects this pressing and waits for the flip-flop 48 to be set.

When there is a visitor and the button 9 of the handset 5 is pressed, the comparator 28 outputs an "L" level pulse as shown in FIG. 4, and the flip-flop 48 is set by this pulse output. . When the controller 40 detects that the flip-flop 48 is set and detects that the call button 9 has been pressed, the process proceeds from step S2 to step S.
Proceed to step 3, connect the switch 31b to b'', start the chime sound generation circuit 29 in the next step S4, and turn on the amplifier 32.
This chime sound is outputted from the speaker 27 via.

Then, in step S5, the resident who hears the chime sound picks up the handset 2 on the base machine side.

When a resident learns of the visitor from the speaker 27's notification sound and picks up the handset 2, the hook switch 59 switches to "
OFF”, and the process advances from step S5 to step S6.
Then, in step S6, the switch 31b is connected to the "a" side, and in step S7, the switch 25b is closed,
A drive current is supplied to the slave device 5 side, and each part of the slave device 5 side is brought into a driving state.

As a result, first, in step S8, the switches 55 and 12 are
0 is connected to the "b" side, and image information is connected to the monitor 122 side so that it can be monitored. Also, the switch 57 is connected to the "d" side, and the switch 56 is connected to the "b" side. Next step S
At step 9, a control code for image transmission from the CPU 40 to the handset 5 is modulated by the modulator 111 and sent to the signal line 16 via the switch 57, the switch 56, the amplifier 23, etc. The handset 5 receives this modulation control code from the signal line 16, demodulates it with the demodulator 108, and receives it with the controller 107. Then, in step SIO, the subject is photographed by the video camera 100 under the control of the controller 107, and the photographed image is imported into the image memory 104.
The captured image is read out by the memory 104 under the control of the memory controller 103, sent to the modulator 106 via the D/A converter 105, modulated there, and then sent to the base unit via the signal line 16. This image signal is sent to the memory unit 124 via the demodulator 109 and A/D converter 123 of the base unit and is stored therein. Note that this stored image information is automatically read out, sent to the monitor 122 via the amplifier 121, and displayed as a corresponding image. Therefore, those who are at home or the like can visually check for visitors using this monitor 122.

Then, in step Sll, the switch 55 is connected to the a'' side again, and the audio from the handset 5 is output from the speaker 27.
I can hear it with my ears, so I'll do it.

As a result, as shown in step SL2, the communication becomes possible, and the input audio signal from the microphone 24 disposed on the handset 2 is outputted as a sound from the speaker 7 of the handset 5.

On the other hand, the input audio from the microphone 8 of the handset 5 is transmitted to the speaker 27.
This will result in more output. And when the call ends,
The handset 2 is hung on the hook, and the hook switch 59 is turned on again. Therefore, this on-hook is monitored in step S13, and when the on-hook is detected, the process proceeds from step S13 to step S14, where the flip-flop 48 is reset and the process is terminated, and step S1
Return to

Next, the absent mode processing will be explained with reference to FIG. 3(B).

When the absentee mode setting switch 49a is turned on, this absentee mode processing is executed.

First, in step S20, initial processing in the absence mode is executed. That is, the switch 55 is set to the "a" side and the switch 31b is
is connected to the "C" side, and the switch 25b and switch 54 are connected to the "C" side.
．． 58 is controlled "off". Then, in step S21, the system waits for the visitor to press the call button 9. When a visitor comes and presses the call button 9, the flip-flop 48
is set, the process proceeds from step S21 to step S22, where the switch 25b is turned on, and in the following step S23, the switch 31b is connected to "b". Then, the chime sound generation circuit 29 is energized for a certain period of time (for example, several seconds to several tens of seconds), and the speaker 27 outputs a chime sound. This is because even if the home mode is set, there may be someone in the home, so in such a case, the user can directly interact with the visitor.

After a certain period of time has elapsed, the process proceeds to step S25, where the controller 40 controls the switches 55, 123, 56, and 316 to connect them to the "b" side, and sets the switch 120 to the "b" side.
a" side, and the switch 57 to the "d" side. Then, in step S26, the CPU 4'9 sends out an image input code, and in the following step S27, the demodulator 109 demodulates the image from the handset 5. , is input to the image section of the audio/image recording/playback section 47 and stored.The access speed of the memory 104 that stores the image information photographed by the handset 5 is 100.
The speed is Kbps. For this reason, for example 100X96
In the case of an image of the size of a pixel, it takes about one second at most to capture the image information associated with photographing with the handset 5 and to record it in the audio/image recording/playback unit 47.

Next, in step S28, the switch 57 is controlled to connect to the “C” side, which is the resident comment storage unit 42 side, and in step S29, the resident comment storage unit 42 is activated, and the information from the resident comment storage unit 42 is The read information is sent to the handset 5 side and output from the speaker 7 of the handset 5. This resident comment storage unit 42 can store comments desired by the resident in advance through the process described later. Please let me record this message.'' Next, in step S30, the switch 56 is connected to the "b" side, which is the microphone 24 side, and in step S3
1 to connect the switch 55 to the a'' side. As a result, the input audio information from the handset 5 is transferred to the audio/image recording/playback section 47.
This means that it is input to the audio section of .

Therefore, in the subsequent step S32, the message recording/reproducing section 47 is activated for a predetermined period of time and kept in a recording state.
This predetermined time is preferably several seconds to several tens of seconds. During this time, the visitor inputs the desired communication through the microphone 8 of the handset 5, and the audio/video from the base unit 1 is automatically changed.
The image will be recorded in the image recording/reproducing section 47.

This audio/image recording/playback section 47 includes a semiconductor memory, A
It consists of a /D converter, a D/A converter, a memory controller, etc. When the message recording is finished, the flip-flop 48 is reset in step S33, and the controller 40 controls the audio/image recording/playback unit 4 in step S34.
The number of messages and images recorded in 7 is counted and retained. Then, the process returns to step S20 to prepare for recording the next visitor.

Next, referring to FIG. 3(C), we will explain the process of reading messages and images from visitors recorded in the audio/image recording/playback unit 47 via the telephone line when the resident is absent. do.

The called detection circuit 45 constantly monitors whether or not a called signal is received from the lines L1 and L2. When a called signal is detected, the controller 40 is notified that there is a called signal, and the controller 40 executes this process.

That is, when there is a call from another telephone on the lines Ll and L2, and a ringing tone at a predetermined interval of 16 Hz is sent from the lines Ll and L2, the called detector 45 detects this and notifies the controller 40. . Then, in step S51, the controller 40 checks whether this called signal has been received a predetermined number of times. If the read signal has not arrived a predetermined number of times, it waits until a predetermined number of called signals are detected. Here, when a predetermined number of called signals are detected consecutively, step S
The process proceeds from step S51 to step S52, and if a predetermined number of called signals are not detected consecutively, it is assumed that the call was a mistake and the process returns to the initial state.

In step S52, the switch 500 is switched and the line L
1, L2 are connected to the transformer 52 side, and the line L1.L2 is connected to the transformer 52 side. It responds by generating a DC loop in L2. And step S53
starts the DTMF signal detector 43, detects the DTMF signal sent from the lines Ll and L2 via the transformer 52 and the buffer 51, and sends the detected signal to the controller 4.
Send to 0. The controller 4o stores this detection signal in a temporary buffer in step S54, and checks whether the end of input has been detected in step S55. If the input is not completed here, in step S56 the DTMF signal detector 5
3 checks whether or not a line release sound has been detected, and if no line release sound has been detected, the process returns to step S53 and the next DTMF signal is detected.

Through the above process, the destination telephone calls this device, and when the device answers, press and input the telephone switch, for example, press the "buttock" button of the telephone, and then input the desired password. Just input it using the numeric keypad, and then press the "bone" button again when you're done. For example, if the last word “Yu” is input, this can be sent to the DTM.
The F signal detector 43 detects and sends it to the controller 40,
The information is sent to the controller 40, and the controller 40 proceeds from step S55 to step S57 as the end of the input.

In step S57, the received password information stored in the buffer is compared with the password information stored in the password storage section 44.

Here, if the two values are equal, it is determined that the passwords match, and the process proceeds to step 358, where the switch 57 is turned on for audio/image recording.
Connected to the image section "b" side of the reproduction section 47, followed by step S
At 59, the switch 56 is connected to the "b" side which is the switch 57 side.

Further, in step S60, the switch 54 is turned on (closed connection).
Next, in step S61, the audio/image recording/playback section 4
The image unit 7 is activated, and the images recorded by the visitor in the process shown in FIG. 3(b) are read out in the order in which they were stored, and
switch 57, switch 56, amplifier 23, transistor 18, switch 54, buffer 50, transformer 52,
The signal is sent to the lines LL and L2 via the switch 500, and in the subsequent step S62, the switch 57 is connected to the "a" side, which is the audio section side of the audio/image recording/playback section 47, and step 3
In step 63, audio is transmitted in the same way as images. Therefore, by simply calling the device of this embodiment from a desired telephone via a public line and entering a preset password, only the user can read the recorded contents of the audio/image recording/playback section 47. I can do it.

Then, in step S64, the controller 40 monitors whether the response detector 46 detects that the call has ended and the called party has opened the line, or the DTMF signal detector 43 detects inter-line sound. , when the line is released, the process advances to step S65, and the switch 500 is controlled to open the line Ll.
, L2 to the telephone 60 side. At this time, phone 6
0 is an on-hook state, the DC loop formed on the lines Ll and L2 is opened, and the lines Ll and L2 are restored. In the following step 866, each switch is set to the initial state, that is, in the same manner as step S20 in FIG. 3(B), and all processing is completed.

On the other hand, if line disconnection is detected in step S56, and if the passwords do not match in step S57, the process advances to step S65.

Furthermore, in this embodiment, the recorded comments in the resident comment storage section 42 can be rewritten.

The details of this process will be explained below with reference to the flowchart in FIG. 3(D).

The controller 40 is a comment setting switch 4 of the mother machine 1.
When 9b is pressed and input, the comment storage mode process shown in FIG. 3(D) is executed.

First, in step S80, the switch 57 is connected to the "C" side, which is the resident comment storage section 42 side, and in step S81, the switch 58 is closed, and in the next step S82, the handset 2 is picked up and the hook switch 59 is turned off. to monitor. When the handset 2 is picked up here, the process proceeds to step S83, where the switch 56 is connected to the microphone 24 side (a'' side) so that the input voice from the microphone 24 is input to the resident comment recording section 42.Then, step In S84, the resident comment recording section 42 is activated to be in a recording state, and in step S85, it waits for comments to be input from the microphone 24.

Here, when a comment is input, it is sequentially sent to the resident comment recording section 42 and recorded, and the above-mentioned comment is input. Then, when the input of the comment is completed, the handset 2
set on the hook and turn on the hook switch 59.

When the controller 40 detects this in step S86, it ends recording in the resident comment storage section 42 and ends the process. Note that the recording time of the resident comment recording section 42 may be controlled so that the recording ends automatically when a predetermined time has elapsed, instead of when the handset 2 is set on the hook.

Further, when the password setting switch 49c is turned on, the password stored in the password recording section 44 can be updated, and in this case, the control shown in FIG. 3(E) is executed. The details of this password registration process will be explained below with reference to FIG. 3(E).

When the password setting switch 49c is set to "on", the process enters the execution mode, and first, in step S90, it is checked whether there is any key force on the keyboard 53. If there is no key input from the keyboard 53, it is checked in step S91 whether the password setting switch 49c is turned off, and if it is not turned off, the process returns to step S90.
It waits until the keyboard 53 is pressed or the password registration switch 49c is turned off.

If there is any key input from the keyboard 53, the process advances from step S90 to step S93, and the data input using the key input is temporarily stored in a buffer in the controller 40. Then, the process returns to step S90 to prepare for the next key manpower.

When the password registration is completed, the password registration switch 49c is turned off. When this password registration switch 49c is turned off and registration is completed, step S9
1, the process proceeds to step S92, and the password temporarily stored in the buffer is stored in the password storage section 44. In the registration here, the input while the password registration switch 49c is on is considered as a valid password, but this process starts when the password registration switch 49c is input once, and the password input range is, for example, a specific password of the keyboard 53. It is also possible to register the password within the range enclosed by the key “diamond”.

[Other Embodiments] In the present embodiment described above, a function is added in which even if a visitor presses the call button 9 continuously, only the first call will be answered, and the call will be ignored for a certain period of time. It's also easy to do.

In addition, in the above explanation, an example of password input when the connection line is a DTMF line was explained, but if password input from a telephone connected to the dial line is also valid, dial signals from lines Ll and L2 can be used. It is also possible to provide a mechanism for receiving and detecting the telephone number information, so that the dial signal sent here can be detected and the telephone number information can be detected.

It is also possible to configure resident comments to be changeable from outside. In this case, for example, a function selection key code may be added after the above-mentioned password and integrated, and various operation controls may be performed using the combination of the password and the function selection key code.

[Effects of the Invention] As explained above, according to the present invention, even if there is a visitor when you are not present, messages and images of the visitor can be automatically recorded, and the recorded contents can be transmitted to others via public telephone lines. It can be read out from any telephone, allowing you to respond appropriately when you are away for a long time or when there is an urgent matter.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment according to the present invention, Fig. 2 is an external view of this embodiment, Figs. 3 (A) to (E) are operation control flowcharts of this embodiment, and Fig. 4 is a conventional one. FIG. 2 is a block diagram of a doorbell. In the diagram, 1... Mother unit, 2... Handset, 5...
Handset, 10.11, 23.32...Amplifier, 8.24
... Microphone, 7, 27 ... Speaker, 9 ... Call button, 15 ... Power supply extraction circuit, 29 ... Chime sound generation circuit, 30 ... Power supply circuit, 40 ...
Controller, 41... ROM, 42... Resident comment storage unit, 43...-DTMF signal detector, 44...
... Password storage unit, 45... Called detector, 46.
...Response detector, 47...Audio/image recording/playback section,
52...Trance, 53...Keyboard, 100.
...Video camera, 102, 123...A/D converter, 103...Memory controller, 105...D/
A converter, 104--memory, 106, 110. l
11--Modulator, 108.109--Demodulator, 10
7... Controller, 124... Memory section, 122
...It's a monitor. Patent applicant Canon Co., Ltd. 2nd W! A Figure 3 (E) Figure 3 (D)

Claims (2)

[Claims] (1) A doorbell consisting of a base unit connected to a public line and a handset placed at a calling position, wherein the handset has a call button, audio input means for inputting audio, and audio signals. an audio output means for outputting sound; an image input means for inputting image information; an accumulation means for accumulating image information input by the image input means; and a transmission for sending the image information accumulated in the accumulation means to the base unit. output means for outputting pre-stored specific audio information to the slave unit that is activated by inputting a call button of the slave unit to the base unit; and input audio information and images sent from the slave unit. a recording means for recording information; a called detection means for detecting an incoming call from a connected public line; a response means for responding to the line activated by the detection of a call by the called detection means; and the response means and a transmission means for reading and transmitting the input voice information and image information from the handset stored in the storage means to a reading line after a response to the handset. (2) The door intercom according to claim 1, wherein the sending means reads the recorded content from the storage means only when predetermined specific information is sent from the line.