US 5,164,979 AGranted

Security system using telephone lines to transmit video images to remote supervisory location

AssigneeGoldstar Co., Ltd.

InventorHyun J. Choi

Life of this patent

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Abstract

Supervisory alarm transmission and remote alarm receipt devices which, when an emergency event such as a burglar, a fire or the like that is being monitored by a supervisory alarm device takes place, the emergency event is transmitted through telephone lines in order for a remote supervisor to be able to directly watch a spot situation through a monitor, consisting of a supervisory alarm transmission device which comprises an alarm processing control section, a video data processing section and a data transmitting section, and a remote alarm receipt device which comprises a data receipt section, a receipt processing control section and a data processing section. By these arrangements, a user can take an instant countermeasure and the power consumption is minimized in a stand-by state because only the stand-by electric power is supplied to the supervisory alarm transmission device and the remote alarm receipt device until data is received according to event occurrence sensing by each sensing section and to a data transmission indication signal.

Claims8

Dependent claims

A supervisory alarm transmission device, comprising:

sensing means for sensing an alarming event;
an alarm processing control section responsive to said sensing means and effective for directing a camera towards said alarming event and for producing video images of said alarming event;
a control means for said alarm processing control section, said control means including operator control input means for receiving from an operator at least a first value N signifying a number of video images to be taken of a sensed alarming event and a second value T signifying a time delay between successive video images;
a video data processing section for converting said video images to video data, storing video data according to a predetermined protocol of said alarm processing control section and outputting said stored video data;
and
a data transmission section for generating and transmitting to a receiving station a dual tone multi-frequency signal carrying said stored video data in a format matched to selected telephone lines according to control information of said alarm processing control section, said data transmission section being further effective for inputting receiving-side responses and for modulating the video data from said video data processing section and transmitting the modulated video data through said telephone lines.

3 more elements

A remote alarm receiving device, comprising:

a data receiving section, including a telephone set, for detecting a ring signal and a hook switch state associated with a telephone call, for detecting a tone signal after matching the same with an amplifying transmission signal, and for generating a retransmission on request as a dual tone multifrequency signal;
a control section for controlling a ring signal, a hook state signal and a tone signal received from said data receiving section, for controlling said retransmission request, and for controlling data processing of data received by said data receiving section;
a data processing section for storing in a memory or displaying on a screen digitized video data derived from demodulated video signals received through said data receiving station according to predetermined control criteria;
and
said control section including means for determining whether said telephone call has been manually answered and for directing said video data into said memory when said telephone call has not been manually answered and for directing said video data to said screen when said telephone call has been manually answered.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/616,800Filed 21 Nov 1990
Priority: KR 16889/198921 Nov 1989
Granted: 17 Nov 1992
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04M 11/04
Telephonic communication systems specially adapted for combination with other electrical systems: with alarm systems, e.g. fire, police or burglar…
G08B 13/19634
Using television cameras: electrical details of the system, e.g. component blocks for carrying out specific functions
G08B 13/19658
Details concerning communication with a camera: telephone systems used to communicate with a camera, e.g. PSTN, GSM, POTS
G08B 13/19695
Using television cameras: arrangements wherein non-video detectors start video recording or forwarding but do not generate an alarm themselves