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US 2003/0193563 A1Published application
Television door intercom apparatus
AssigneeAiphone Co., Ltd.
InventorTsuyoshi Suzuki
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AssigneeAiphone Co., Ltd.
InventorTsuyoshi Suzuki
Estimating the term…
A television door intercom apparatus improves recognition performance for a resident inside a house to recognize a visitor conducting a call operation at the entrance and security in responding to the call. A call detection circuit 31 of a residential master station 2 detects a call when a visitor pushes a call button 11 of a door intercom substation 1, activates a signal generator circuit 32 and causes a master station speaker 39 to output a call sound so that a communication can be exchanged between a substation microphone 16 and a substation speaker 17 of the door intercom substation and a master station microphone 38 and the master station speaker of the residential master station. When a picture monitor 36 of the residential master station displays a picture taken by a camera 13 of the door intercom substation, the residential master station further includes a message transmission circuit 34 activated when the call detection circuit detects the call, for causing the substation speaker to output a message content of a message storage circuit 33 storing in advance a predetermined message.
A television door intercom apparatus of a type in which a call detection circuit (31) of a residential master station (2) detects a push operation of a call button (11) of a door intercom substation (1) by a visitor, activates a signal generator circuit (32) and causes a master station speaker (39) to output a call sound so that a communication can be exchanged between a substation microphone (16) and a substation speaker (17) of said door intercom substation and a master station microphone (38) and said master station speaker (39) of said residential master station, and a picture monitor (36) of said residential master station displays a picture taken by a camera (13) of said door intercom substation, wherein said residential master station includes a message transmission circuit (34) activated when said call detection circuit detects the call, for causing said substation speaker to output a message content of a message storage circuit (33) storing in advance a predetermined message.
A television door intercom apparatus of a type in which a call detection circuit (31) of a residential master station (52) detects a push operation of a call button (11) of a door intercom substation (51) by a visitor, activates a signal generator circuit (32) and causes a master station speaker (39) to output a call sound so that a communication can be exchanged between a substation microphone (16) and a substation speaker (17) of said door intercom substation and a master station microphone (38) and said master station speaker (39) of said residential master station, and a picture monitor (36) of said residential master station displays a picture taken by a camera (13) of said door intercom substation, wherein said door intercom substation includes a passive sensor (20) for outputting an out-of-field-of-view-angle signal when the visitor is outside the range of a field-of-view angle of said camera, and said residential master station includes a sensor detection circuit (42) for detecting said out-of-field-of-view-angle signal and a message transmission circuit (34) activated when said call detection circuit detects the call, for causing said substation speaker to output a message content of a message storage circuit (33) storing in advance a predetermined message.
A television door intercom apparatus of a type in which a call detection circuit (31) of a residential master station (102) detects a push operation of a call button (11) of a door intercom substation (101) by a visitor, activates a signal generator circuit (32) and causes a master station speaker (39) to output a call sound so that a communication can be exchanged between a substation microphone (16) and a substation speaker (17) of said door intercom substation and a master station microphone (38) and said master station speaker (39) of said residential master station, and a picture monitor (36) of said residential master station displays a picture taken by a camera (13) of said door intercom substation, wherein said residential master station includes a picture amount comparison circuit (43) for outputting an out-of-field-of-view-angle signal representing that the visitor is outside the range of a field-of-view angle of said camera when a picture amount of a picture displayed by said picture monitor is smaller than a predetermined reference picture amount, and a message transmission circuit (34) activated by said out-of-field-of-view-angle signal, for causing said substation speaker to output a message content of a message storage circuit (33) storing in advance a predetermined message.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
For receiving images from a single remote source: video door telephones
Pictorial communication
Term end not estimated
This invention relates to a television door intercom apparatus. More particularly, the invention relates to a television door intercom apparatus that improves recognition performance for a resident inside a house to recognize a visitor pushing a call button at the entrance for a call operation, and security in responding to the call.
A television door intercom apparatus having a construction shown in a block diagram of FIG. 7 has been proposed in the past as a television door intercom apparatus of this kind.
The television door intercom apparatus shown in the drawing has a door intercom substation 501 installed at the entrance and including a control circuit (hereinafter called a “substation CPU) 510, a call button 511, a call detection circuit (hereinafter called a “substation call detection circuit) 512, a camera 513, a picture processing circuit 514, a picture modulation circuit 515, a substation microphone 516, a substation speaker 517, a communication circuit (hereinafter called a “substation communication circuit”) 518 and a transmission interface circuit (hereinafter called a “substation transmission I/F”) 519, and a residential master station 502 installed inside a house and including a control circuit (hereinafter called a “master station CPU) 520, a call detection circuit (hereinafter called a “master station call detection circuit) 521, a signal generator circuit 522, a picture demodulation circuit 523, a picture monitor 524, a communication on/off switch 525, a master station microphone 526, a master station speaker 527, a communication circuit (hereinafter called a “master station communication circuit”) 528 and a transmission interface circuit (hereinafter called a “master station transmission I/F”) 529. The door intercom substation 501 and the residential master station 502 are connected to each other through a transmission line L501 having two wires.
FIG. 1 is a block diagram showing a construction of a television door intercom apparatus according to a first embodiment of the invention;
FIG. 2 is a block diagram showing a construction of a television door intercom apparatus according to a second embodiment of the invention;
FIG. 3 is a block diagram showing a construction of a television door intercom apparatus according to a third embodiment of the invention;
Television door intercom apparatuses according to several preferred embodiments of the invention will be explained hereinafter with reference to the accompanying drawings.
FIG. 1 is a block diagram showing a construction of a television door intercom apparatus according to a first embodiment of the invention. This apparatus includes a door intercom substation 1 installed at the entrance and a residential master station 2 installed inside a room. The door intercom substation 1 and the residential master station 2 are connected to each other through a transmission line L1 having two wires.
The door intercom substation 1 includes a control circuit (hereinafter called “substation CPU”) 10 for controlling the door intercom substation, a call button 11 operated by a visitor at the entrance to call a resident, a call detection circuit (hereinafter called a “substation call detection circuit”) 12 for detecting the push operation of the call button 11 and outputting a call signal, a camera 13 for imaging the visitor pushing the call button 11, a picture processing circuit 14 for processing the picture taken by the camera 13 into electric signals, a picture modulation circuit 15 for modulating (for executing FM modulation of)the electric picture signals processed by the picture processing circuit 14, a substation microphone 16 for picking up a communication of the visitor to the resident, a substation speaker 17 for outputting the communication sound between the visitor and the resident and a later-appearing message content, a communication circuit (hereinafter called “substation communication circuit”) 18 for appropriately processing (4 line/2 line conversion and 2 line/4 line conversion) the communication signals constituting the communication sound of the substation speaker 17 and forming a communication path, and a transmission interface circuit (hereinafter called a “substation transmission I/F”) 19 for respectively forming signal transmission lines that connect the substation CPU 10, the picture modulation circuit 15, the substation communication circuit 18 and the transmission line L1 connected to a transmission line connection terminal P1, and executing appropriate signal processing (multiplexing and isolation) of these signals so that the signals can be transmitted and received.