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EP0554948A1 - Apparatus for remote surveillance of premises - Google Patents

Apparatus for remote surveillance of premises Download PDF

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Publication number
EP0554948A1
EP0554948A1 EP93200253A EP93200253A EP0554948A1 EP 0554948 A1 EP0554948 A1 EP 0554948A1 EP 93200253 A EP93200253 A EP 93200253A EP 93200253 A EP93200253 A EP 93200253A EP 0554948 A1 EP0554948 A1 EP 0554948A1
Authority
EP
European Patent Office
Prior art keywords
videotelephone
remote image
transmitted
image device
remote
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93200253A
Other languages
German (de)
French (fr)
Inventor
Peter Dr. Vogel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0554948A1 publication Critical patent/EP0554948A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19654—Details concerning communication with a camera
    • G08B13/19658—Telephone systems used to communicate with a camera, e.g. PSTN, GSM, POTS
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19639—Details of the system layout
    • G08B13/19645—Multiple cameras, each having view on one of a plurality of scenes, e.g. multiple cameras for multi-room surveillance or for tracking an object by view hand-over
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19665—Details related to the storage of video surveillance data
    • G08B13/19669—Event triggers storage or change of storage policy

Definitions

  • the invention relates to a system for remote monitoring of rooms with at least two remote image devices that are connected to a dial-up network.
  • Remote image devices are to be understood here as receiving or transmitting devices which either have only one video camera or only one screen or both. In the latter case it is - if audio signals are also transmitted - video telephones.
  • Room surveillance systems in which video telephones connected to a dial-up network are used are known.
  • DE-A1-3827928 describes a video telephone that is suitable for room monitoring in conjunction with some additional circuits.
  • These additional circuits include an image memory, with the aid of which the differences between successive images of the running camera of the video telephone set are checked. If the difference exceeds a predetermined level, an alarm signal is automatically issued.
  • a monitoring station can also be called automatically in parallel via the dial-up network.
  • the invention has for its object to provide a room surveillance system of the type mentioned, in which a scene analysis is omitted to detect a dangerous situation.
  • One embodiment consists of the fact that at least one remote image device contains means which are intended to convert received character combinations into control pulses for the Implement the change in the position of his camera.
  • the invention will now be explained in more detail with reference to the figure and an exemplary embodiment.
  • the figure shows schematically an intercom that is suitable for a system according to the invention.
  • the video telephone 1 shown in the figure is divided into two groups 2 and 3 of functional units.
  • the functional unit 2 contains, as sub-units, all units which are required for a video telephone device according to the prior art, namely a camera 4, a monitor 5, a control unit 6 and a transmitting and receiving part 7.
  • the operating devices for the video telephone device 1 are not entered , since such devices are of secondary importance for the invention.
  • all functional units are summarized which are still important, among other things, for the special design of the video telephone, such as a data-reducing encoder, a corresponding decoder and a network access device for both transmission directions.
  • Group 3 of functional units is activated together with control unit 6 when the video telephone set is to be used for remote monitoring.
  • Group 3 consists of two memories 8 and 10, a comparator 9 and a timer 11.
  • the dial-up network itself is an ISDN network in which, for example, the caller's number is transferred to the called party when a call is made. This fact - as will be explained in more detail below - is used for a check by the called subscriber.
  • the video telephone 1 is switched to a "ready to test” state via the control panel (not shown). If it receives a call in this state, it changes to an “input” state, which begins with the setting of a timer 11 and ends when it expires. In the "input” state, the caller's number transmitted via the ISDN network is read into the memory 8. Separately, a further combination of numbers, which the caller has to enter on his device after the call number, is also stored in the memory 8. This combination of numbers is called the input number here. The input and telephone numbers are used to check whether the caller is authorized to access or not.
  • the test is carried out by the comparator 9, to which the two numbers are fed one after the other and which compares them with the numbers read by the controller 6 from the second memory 10. If one of the numbers received does not match the stored numbers, the video telephone 1 is reset to the "ready to test” state and the connection is released. Otherwise, the video telephone set 1 is put into a "send” state in which it transmits the images recorded by the camera 5 to the caller.
  • the caller can also enter character combinations via his operating device, which are transmitted by the controller 6 as pulses to the camera 5 for changing their position. If the connection is triggered by the caller, the video telephone device 1 falls back into the "ready to test” state.
  • z. B the input and output of data from the functional units of group 3 controlled by the control unit 6.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

An apparatus for the remote surveillance of rooms is described. The apparatus contains at least 2 videotelephone sets which are connected to a switch network. To circumvent problems entailed by an automatic analysis of the scenes to be monitored, it is proposed that at least one videotelephone set contains a) means (8,9,10) which are provided for checking a character combination transmitted from another videotelephone set via the switch network for access authorisation, b) means (6) which are provided for placing the videotelephone set into the position of automatically transmitting current data to another videotelephone set if its transmitted character combination has resulted in an access authorisation. <IMAGE>

Description

Die Erfindung betrifft eine Anlage zur Fernüberwachung von Räumen mit mindestens zwei Bildferngeräten, die an ein Wählnetz angeschlossen sind.The invention relates to a system for remote monitoring of rooms with at least two remote image devices that are connected to a dial-up network.

Unter Bildferngeräten sollen hier Empfangs- oder Sendegeräte verstanden werden, die entweder nur über eine Videokamera oder nur über einen Bildschirm oder über beides verfügen. Im letzten Falle handelt es sich - falls auch Tonsignale übertragen werden - um Bildfernsprechgeräte.Remote image devices are to be understood here as receiving or transmitting devices which either have only one video camera or only one screen or both. In the latter case it is - if audio signals are also transmitted - video telephones.

Raumüberwachungsanlagen, bei denen an ein Wählnetz angeschlossene Bildfernsprechgeräte verwendet werden, sind bekannt. So wird zum Beispiel in der DE-A1-3827928 ein Bildfernsprechgerät beschrieben, das sich in Verbindung mit einigen Zusatzschaltungen für eine Raumüberwachung eignet. Diese Zusatzschaltungen umfassen unter anderem einen Bildspeicher, mit dessen Hilfe die Unterschiede aufeinanderfolgender Bilder der laufenden Kamera des Bildfernsprechgerätes überprüft werden. Überschreitet der Unterschied ein vorgegebenes Maß, wird automatisch ein Alarmsignal abgegeben. Ebenfalls automatisch kann parallel dazu über das Wählnetz eine überwachende Stelle angerufen werden.Room surveillance systems in which video telephones connected to a dial-up network are used are known. For example, DE-A1-3827928 describes a video telephone that is suitable for room monitoring in conjunction with some additional circuits. These additional circuits include an image memory, with the aid of which the differences between successive images of the running camera of the video telephone set are checked. If the difference exceeds a predetermined level, an alarm signal is automatically issued. A monitoring station can also be called automatically in parallel via the dial-up network.

Ein nicht unwesentlicher Nachteil dieser und ähnlicher Raumüberwachungsanlagen ist darin zu sehen, daß die Alarmauslösung an das Ergebnis einer automatischen Analyse der von der Kamera des Bildfernsprechgerätes aufgenommen Szenen gekoppelt ist.A not insignificant disadvantage of this and similar room surveillance systems can be seen in the fact that the alarm triggering is linked to the result of an automatic analysis of the scenes recorded by the camera of the video intercom.

Diese Szenenanalyse - im Beispiel der DE-A1-3827928 der Vergleich aufeinanderfolgender Bilder - kann erfahrungsgemäß zu einem sehr hohen Prozentsatz (in manchen Fällen bis zu 90 %) zu Fehlalarmen führen. Solche Fehlalarme werden z. B. durch nicht zu langsame Änderungen der Lichtverhältnisse im zu überwachenden Raum ausgelöst. Bei Tage z. B. durch Veränderung der Sonneneinstrahlung, weil plötzlich die Bewölkung aufreißt, bei Nacht z. B. weil die Straßenbeleuchtung ausgeschaltet wird. Zwischen einer wirklichen Gefahr und einer harmlosen Änderung kann durch eine automatische Szenenanalyse nur sehr schwer unterschieden werden. Besonders schwierig liegt der Fall, wenn die zu beaufsichtigende Szene selbst bewegte Bilder enthält, wie z. B. spielende Kinder oder Haustiere. Für solche Fälle sind Überwachungsanlagen wie sie in der DE-A1-3827928 beschrieben sind, unbrauchbar.Experience has shown that this scene analysis - in the example of DE-A1-3827928 the comparison of successive images - can a very high percentage (in some cases up to 90%) of false alarms. Such false alarms are e.g. B. triggered by not too slow changes in the lighting conditions in the room to be monitored. In days such. B. by changing the solar radiation, because suddenly the clouds open up, at night z. B. because the street lighting is switched off. Automatic scene analysis makes it very difficult to differentiate between a real danger and a harmless change. The case is particularly difficult if the scene to be supervised contains even moving images, such as. B. playing children or pets. For such cases, monitoring systems as described in DE-A1-3827928 are unusable.

Der Erfindung liegt die Aufgabe zugrunde, eine Raumüberwachungsanlage der eingangs genannten Art anzugeben, bei der eine Szenenanalyse entfällt, um eine Gefahrensituation zu erkennen.The invention has for its object to provide a room surveillance system of the type mentioned, in which a scene analysis is omitted to detect a dangerous situation.

Diese Aufgabe wird dadurch gelöst, daß mindestens ein Bildferngerät

  • a) Mittel enthält, die dafür vorgesehen sind, eine von einem anderen Bildferngerät über das Wählnetz übertragene Zeichenkombination auf eine Zugangsberechtigung hin zu überprüfen,
  • b) Mittel enthält, die dafür vorgesehen sind, das Bildferngerät in die Lage zu versetzen, automatisch aktuelle Daten an ein anderes Bildferngerät zu senden, sofern dessen übertragene Zeichenkombination eine Zugangsberechtigung ergeben hat.
This object is achieved in that at least one remote image device
  • a) contains means which are provided for checking a combination of characters transmitted from another remote image device via the dial-up network for access authorization,
  • b) Contains means which are intended to enable the remote image device to automatically send current data to another remote image device, provided that the combination of characters transmitted has given access authorization.

Eine Ausgestaltung besteht darin, daß mindestens ein Bildferngerät Mittel enthält, die dafür vorgesehen sind, empfangene Zeichenkombinationen in Steuerimpulse für die Änderung der Position seiner Kamera umzusetzen. Anhand der Figur und anhand eines Ausführungsbeispiels soll die Erfindung nun näher erläutert werden.One embodiment consists of the fact that at least one remote image device contains means which are intended to convert received character combinations into control pulses for the Implement the change in the position of his camera. The invention will now be explained in more detail with reference to the figure and an exemplary embodiment.

Die Figur zeigt schematisch ein Bildfernsprechgerät, das sich für eine Anlage nach der Erfindung eignet.The figure shows schematically an intercom that is suitable for a system according to the invention.

Das in der Figur abgebildete Bildfernsprechgerät 1 gliedert sich in zwei Gruppen 2 und 3 von Funktionseinheiten. Die Funktionseinheit 2 enthält als Untereinheiten alle Einheiten, die für ein Bildfernsprechgerät nach dem Stand der Technik erforderlich sind, nämlich eine Kamera 4, einen Monitor 5, eine Steuereinheit 6 und einen Sende- und Empfangsteil 7. Nicht eingetragen sind die Bedieneinrichtungen für das Bildfernsprechgerät 1, da solche Einrichtungen für die Erfindung von untergeordneter Bedeutung sind. Im Sende- und Emfangsteil 7 sind alle Funktionseinheiten zusammengefasst, die unter anderem für die spezielle Ausgestaltung des Bildfernsprechgerätes noch von Bedeutung sind, wie z.B. ein datenreduzierender Codierer, ein entsprechender Decodierer sowie ein Netzzugangsgerät für beide Übertragungsrichtungen.The video telephone 1 shown in the figure is divided into two groups 2 and 3 of functional units. The functional unit 2 contains, as sub-units, all units which are required for a video telephone device according to the prior art, namely a camera 4, a monitor 5, a control unit 6 and a transmitting and receiving part 7. The operating devices for the video telephone device 1 are not entered , since such devices are of secondary importance for the invention. In the transmitting and receiving section 7, all functional units are summarized which are still important, among other things, for the special design of the video telephone, such as a data-reducing encoder, a corresponding decoder and a network access device for both transmission directions.

Die Gruppe 3 von Funktionseinheiten wird zusammen mit der Steuereinheit 6 aktiviert, wenn das Bildfernsprechgerät zur Fernüberwachung eingesetzt werden soll. Die Gruppe 3 besteht aus zwei Speichern 8 und 10, einem Vergleicher 9 und einem Zeitglied 11.Group 3 of functional units is activated together with control unit 6 when the video telephone set is to be used for remote monitoring. Group 3 consists of two memories 8 and 10, a comparator 9 and a timer 11.

Das Wählnetz selbst ist im Beispiel ein ISDN-Netz, in dem z.B. bei einem Anruf die Rufnummer des Anrufers mit an den Gerufenen übertragen wird. Dieser Umstand wird - wie weiter unten noch ausführlicher dargestellt wird - für eine Überprüfung durch den gerufenen Teilnehmer ausgenutzt.In the example, the dial-up network itself is an ISDN network in which, for example, the caller's number is transferred to the called party when a call is made. This fact - as will be explained in more detail below - is used for a check by the called subscriber.

Zur Aktivierung für die Fernüberwachung wird das Bildfernsprechgerät 1 über das nicht gezeigte Bedienfeld in einen Zustand "Prüfbereit" geschaltet. Empfängt es in diesem Zustand einen Anruf, geht es in einen Zustand "Eingabe" über, der mit dem Setzen eines Zeitgliedes 11 beginnt und mit dessen Ablauf wieder endet. Im Zustand "Eingabe" wird die über das ISDN-Netz übertragene Rufnummer des Anrufers in den Speicher 8 eingelesen. Getrennt hiervon wird eine weitere Ziffernkombination, die der Anrufer auf seinem Gerät nach der Rufnummer einzugeben hat, ebenfalls im Speicher 8 abgelegt. Diese Ziffernkombination wird hier Eingabenummer genannt. Eingabe- und Rufnummer dienen der Prüfung, ob der Anrufer zugangsberechtigt ist oder nicht. Die Prüfung erfolgt nach Ablauf des Zeitgliedes 11 durch den Vergleicher 9, dem die beiden Nummern nacheinander zugeführt werden und der sie mit den Nummern vergleicht, die von der Steuerung 6 aus dem zweiten Speicher 10 ausgelesen werden. Stimmt eine der empfangenen Nummern mit den gespeicherten Nummern nicht überein, wird das Bildfernsprechgerät 1 wieder in den Zustand "Prüfbereit" zurückgesetzt und die Verbindung ausgelöst. Anderenfalls wird das Bildfernsprechgerät 1 in einen Zustand "Senden" versetzt, in dem es die von der Kamera 5 aufgenommenen Bilder an den Anrufer überträgt.To activate the remote monitoring, the video telephone 1 is switched to a "ready to test" state via the control panel (not shown). If it receives a call in this state, it changes to an “input” state, which begins with the setting of a timer 11 and ends when it expires. In the "input" state, the caller's number transmitted via the ISDN network is read into the memory 8. Separately, a further combination of numbers, which the caller has to enter on his device after the call number, is also stored in the memory 8. This combination of numbers is called the input number here. The input and telephone numbers are used to check whether the caller is authorized to access or not. After the timer 11 has elapsed, the test is carried out by the comparator 9, to which the two numbers are fed one after the other and which compares them with the numbers read by the controller 6 from the second memory 10. If one of the numbers received does not match the stored numbers, the video telephone 1 is reset to the "ready to test" state and the connection is released. Otherwise, the video telephone set 1 is put into a "send" state in which it transmits the images recorded by the camera 5 to the caller.

Während des Zustandes "Senden" kann der Anrufer über seine Bedieneinrichtung auch Zeichenkombinationen eingeben, die von der Steuerung 6 als Impulse an die Kamera 5 zur Änderung ihrer Position weitergegeben werden. Wird die Verbindung durch den Anrufer ausgelöst, fällt das Bildfernsprechgerät 1 wieder in den Zustand "Prüfbereit" zurück.During the "send" state, the caller can also enter character combinations via his operating device, which are transmitted by the controller 6 as pulses to the camera 5 for changing their position. If the connection is triggered by the caller, the video telephone device 1 falls back into the "ready to test" state.

Wie der bisherigen Beschreibung zu entnehmen ist, wird z. B. die Ein- und Ausgabe von Daten aus den Funktionseinheiten der Gruppe 3 von der Steuereinheit 6 gesteuert.As can be seen from the previous description, z. B. the input and output of data from the functional units of group 3 controlled by the control unit 6.

Daher muß auch die Steuereinheit 6 über Funktionen verfügen, die bei einem Bildfernsprechgerät nach dem Stand der Technik nicht vorhanden sind. Da Steuereinheiten in der Nachrichtenverarbeitung in der Regel durch programmierbare Prozessoren realisiert werden, sind auch die Zusatzfunktionen der Steuereinheit 6 durch ein entsprechendes Zusatzprogramm realisiert. Über das Bedienfeld des Bildfernsprechgerätes 1 wird dieses Zusatzprogramm wirksam geschaltet. Das Durchlaufen unterschiedlicher Zustände des Bildfernsprechgerätes 1 ist gleichbedeutend mit dem Durchlaufen unterschiedlicher Programmteile dieses Zusatzprogrammes. Ein solches Zusatzprogramm soll im folgenden skizziert werden; diese Skizzierzung ist zu einem Flußdiagramm äquivalent. Soweit die Skizzierung bedingte Anweisungen erhält, werden diese Anweisungen übergangen, wenn die Bedingung nicht erfüllt ist.

  • 1. Ist die Eingabe "Prüfbereit" erfolgt? Falls nein, springe nach 1.
  • 2. Wird das Gerät angerufen? Falls nein, springe nach 2. Starte das Zeitglied 11.
  • 3. Lies die Rufnummer des Anrufers in eine Speicherstelle des Speichers 8 ein.
  • 4. Warte auf eine vom Anrufer gewählte Ziffer der Eingabenummer. Falls eine solche Ziffer übertragen worden ist, lies sie in eine zweite Speicherstelle des Speichers 8 ein. Ist das Zeitglied abgelaufen? Falls nein, springe nach 4.
  • 5. Lies die Rufnummer aus Speicher 8 aus und übertrage sie an den ersten Eingang des Vergleichers 9. Lies nacheinander alle im Speicher 10 gespeicherten Nummern aus und übertrage sie an den zweiten Eingang des Vergleichers 10. Prüfe, ob sich während des Auslesens der Nummern aus dem Speicher 10 einmal ein Signalwert am Ausgang des Vergleichers 9 ergeben hat, der Übereinstimmung bedeutet. Falls das nicht der Fall ist, löse die Verbindung aus und springe nach 1.
  • 6. Lies den Inhalt der zweiten Speicherstelle des Speichers 8 aus und übertrage ihn an den ersten Eingang des Vergleichers 9. Lies nacheinander alle im Speicher 10 gespeicherten Nummern aus und übertrage sie an den zweiten Eingang des Vergleichers 10. Prüfe, ob sich während des Auslesens der Nummrn aus dem Speicher 10 einmal ein Signalwert am Ausgang des Vergleichers 9 ergeben hat, der Übereinstimmung bedeutet. Falls das nicht der Fall ist, löse die Verbindung aus und springe nach 1.
  • 7. Übertrage die von der Kamera aufgenommenen Bilder und prüfe, ob weitere, vom Anrufer kommende Ziffernkombinationen eingehen. Falls ja, setze diese in Steuerdaten um und übertrage sie an die Kamera.
Therefore, the control unit 6 must also have functions that are not available in a video telephone device according to the prior art. Since control units in message processing are generally implemented by programmable processors, the additional functions of control unit 6 are also implemented by a corresponding additional program. This additional program is activated via the control panel of the video telephone 1. Going through different states of the video telephone set 1 is equivalent to going through different program parts of this additional program. Such an additional program will be outlined below; this sketch is equivalent to a flow chart. As far as the sketch receives conditional instructions, these instructions are ignored if the condition is not met.
  • 1. Has the entry "Ready for inspection" been made? If no, jump to 1.
  • 2. Is the device called? If no, jump after 2. Start timer 11.
  • 3. Read the caller's number into a memory location in memory 8.
  • 4. Wait for a digit of the input number dialed by the caller. If such a number has been transmitted, read it into a second memory location in memory 8. Has the timer expired? If no, jump to 4.
  • 5. Read the number from memory 8 and transfer it to the first input of comparator 9. Read all the numbers stored in memory 10 one after the other and transmit them to the second input of the comparator 10. Check whether a signal value at the output of the comparator 9 has occurred during the reading of the numbers from the memory 10, which means agreement. If this is not the case, trigger the connection and jump to 1.
  • 6. Read the content of the second memory location in memory 8 and transfer it to the first input of comparator 9. Read all the numbers stored in memory 10 one after the other and transfer them to the second input of comparator 10. Check whether there is any reading during the reading the number from memory 10 once gave a signal value at the output of comparator 9, which means agreement. If this is not the case, trigger the connection and jump to 1.
  • 7. Transfer the pictures taken by the camera and check whether additional number combinations coming from the caller are received. If so, convert this into control data and transfer it to the camera.

Claims (3)

Anlage zur Fernüberwachung von Räumen mit mindestens zwei Bildferngeräten, die an ein Wählnetz angeschlossen sind,
dadurch gekennzeichnet,
daß mindestens ein Bildferngerät a) Mittel (8,9,10) enthält, die dafür vorgesehen sind, eine von einem anderen Bildferngerät über das Wählnetz übertragene Zeichenkombination auf eine Zugangsberechtigung hin zu überprüfen, b) Mittel (6) enthält, die dafür vorgesehen sind, das Bildferngerät in die Lage zu versetzen, automatisch aktuelle Daten an ein anderes Bildferngerät zu senden, sofern dessen übertragene Zeichenkombination eine Zugangsberechtigung ergeben hat. System for the remote monitoring of rooms with at least two remote image devices connected to a dial-up network,
characterized by
that at least one remote camera a) contains means (8, 9, 10) which are intended to check a combination of characters transmitted by another remote image device via the dial-up network for access authorization, b) contains means (6) which are intended to enable the remote image device to automatically send current data to another remote image device, provided that the combination of characters transmitted has given access authorization. Anlage nach Anspruch 1,
dadurch gekennzeichnet,
daß mindestens ein Bildferngerät Mittel (6) enthält, die dafür vorgesehen sind, empfangene Zeichenkombinationen in Positionen seiner Kamera umzusetzen.System according to claim 1,
characterized by
that at least one remote image device contains means (6) which are intended to convert received character combinations into positions of its camera. Anlage nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß Zeichenkombinationen, die nach Ablauf eines Zeitgliedes (11) übertragen werden, nicht mehr berücksichtigt werden oder die Verbindung nach Ablauf dieses Zeitgliedes (11) ausgelöst wird.System according to claim 1 or 2,
characterized by
that combinations of characters that are transmitted after a timer (11) has expired are no longer taken into account or the connection is triggered after this timer (11) has expired.
EP93200253A 1992-02-06 1993-02-01 Apparatus for remote surveillance of premises Withdrawn EP0554948A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4203388 1992-02-06
DE19924203388 DE4203388A1 (en) 1992-02-06 1992-02-06 SYSTEM FOR REMOTE MONITORING OF ROOMS

Publications (1)

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EP0554948A1 true EP0554948A1 (en) 1993-08-11

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EP93200253A Withdrawn EP0554948A1 (en) 1992-02-06 1993-02-01 Apparatus for remote surveillance of premises

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DE19634778A1 (en) * 1996-08-28 1998-03-05 Sel Alcatel Ag Device for connecting a door intercom with video camera to an integrated digital network
DE19818707A1 (en) * 1998-04-21 1999-10-28 Holger Gumprecht Auxiliary apparatus especially for video conference and video telephone equipment
DE19826087C2 (en) * 1998-06-12 2000-08-17 Alcatel Sa Establishment of a terminal of a telecommunications network
DE19961497A1 (en) * 1999-12-20 2001-06-21 Guenther Sonderwald Device for monitoring room for acoustic signals has sensor unit designed to automatically establish connection via telecommunications unit to telephone unit when acoustic signal detected
DE10033652A1 (en) * 2000-07-11 2002-01-24 Messer Griesheim Gmbh Monitoring system for remote controlled inventory, has head office with evaluation unit that processes signal sequence of data from receiver to obtain actual state of inventory
DE102004040941A1 (en) * 2004-08-24 2006-03-09 Macrosystem Digital Video Ag Imaging security surveillance device

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Cited By (4)

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DE19624542A1 (en) * 1996-06-20 1998-01-02 Siegenia Frank Kg Intruder detection system using video camera
EP0920210A1 (en) * 1997-11-21 1999-06-02 Kazuya Deguchi Remote monitoring and security system and method
EP1139661A3 (en) * 2000-03-28 2002-11-20 Omnivision Technologies Inc. A remote video telephone system
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DE4203388A1 (en) 1993-08-12

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