EP0483140B1 - Integriertes langsames abtastungs- und alarmsystem - Google Patents

Integriertes langsames abtastungs- und alarmsystem Download PDF

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Publication number
EP0483140B1
EP0483140B1 EP89912440A EP89912440A EP0483140B1 EP 0483140 B1 EP0483140 B1 EP 0483140B1 EP 89912440 A EP89912440 A EP 89912440A EP 89912440 A EP89912440 A EP 89912440A EP 0483140 B1 EP0483140 B1 EP 0483140B1
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EP
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Prior art keywords
slow scan
event
alarm
data
integral
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EP89912440A
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English (en)
French (fr)
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EP0483140A1 (de
Inventor
Jan Derek Parish
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Siemens AG
Siemens PLC
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Siemens AG
Siemens PLC
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    • 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

Definitions

  • the present invention relates to a system integrating the functions of remote alarm communication, video picture storage and slow scan picture transmission.
  • Slow scan television techniques have been used in security applications to confirm the reports provided by conventional alarm detectors and possibly identify the cause of an alarm when a remote site is being monitored over a low bandwidth channel.
  • Remote alarm communicators provide useful additional information and facilities using similar low bandwidth channels. Numerous common circuit elements can be identified between each system. Using alarms to trigger picture storage vastly increases the possibility of determining the cause of an alarm.
  • Remote alarm communicators were developped to enable the monitoring of alarm detection devices using widely available, low cost, low bandwidth communication channels. Systems have been developped that provide adequate monitoring of alarm situations but do not give an accurate timed record of the sequence of events at the protected premises. In addition when it has been required in the past to implement a remote alarm facility incorporating a slow scan capability it has been necessary to utilise separate equipments for the two functions or use a slow scan system with limited alarm capability. Further, developments of slow scan systems have traditionally concentrated on achieving improvements in picture quality and transmission times rather than ensuring useful picture content and ease of operation.
  • a surveillance system for detecting intruders in a protected area or property comprising an unmanned closed circuit television apparatus inside the area or property with a transmitter for transmitting video signals via a signal link to a mobile unit positioned temporarily adjacent the area or property.
  • the transmission of signals from the fixed apparatus can only be activated by a coded access signal fed via the link from a store in the mobile unit to a control unit in the fixed apparatus.
  • a recording divice or store records signals from cameras when triggered by a movement detector or other sensors.
  • the mobile unit includes means for causing recorded video signals in the store to be transmitted via the link to the display unit.
  • the object of the present invention is to provide a remote alarm facility incorporating an integral slow scan function thereby giving improved correlation between alarm events and the associated picture.
  • a further object is to improve and extend the remote alarm reporting to cover numerous other events associated with the remote system.
  • a further object is to provide accurate chronological record of the events at the remote site and to provide this without the need for an absolute time reference at each remote site.
  • a further object is to provide a system that can cope with a wide variety of users needs through the use of a flexible and easily accessible configuration structure.
  • a further object is to provide a system that can be used in mobile applications without the need for a wired connection.
  • Event and picture information is stored in a transmitter unit along with an associated time reference. As dictated by system configuration, the stored information can be either ignored if the events are defined as insignificant, or communicated if an event is defined as significant. Particular types of events, known as alarm events, can, as dictated by configuration, be made to cause the storage of one or more pictures in a digital memory.
  • the picture source is selected with an integral video switch. Once a significant event has been encountered a preconfigured telephone number is dialled.
  • the telephone connection can be made by normal wired means or for mobile applications via radio or other non-wired technique (eg. Cellnet (Cellular Network) or radio telephone).
  • a receiver unit on answering the call, requests the transfer of the event data from the transmitter unit via the telephone connection now established.
  • the time reference is also transferred and both this and the associated event displayed to a system operator via a standard video monitor. If the receiver detects that pictures have been stored at the transmitter this is signalled to the operator. Pictures are transferred on request over the same communication channel as used for event information. Once transferred both event and picture information is stored at the receiver unit. User specific configuration data is held in electrically eraseable none volatile memory. Configuration changes can be made using the same communication channel as used for event information.
  • integrated slow scan alarm apparatus comprising two individual units, one dedicated to the function of event and slow scan storage and transmission and the other to the function of event and slow reception and display.
  • the transmission unit will include a means for video input switching allowing the selection of one of a number of video sources.
  • the unit may also include a method of video signal digitisation control such that the video signal range is matched to that of the memory storage means.
  • the unit may also include a video sync detection means to inform the microprocessor controlling means of the condition of the selected video source.
  • the unit may also include a means for allowing the microprocessor controlling means to request the storage of a frame of video information in the memory storage means.
  • the unit will provide a mode of operation allowing the signals presented on the alarm input means to cause the storage of a frame of video information.
  • the unit may also include a queueing means such that alarms or other events detected by the unit are stored in chronological order.
  • the unit may also include a timing means such that the relative time of the alarms or events stored by the queueing means are stored alongside the associated alarm or event.
  • the receiver unit will provide a method of user control allowing selection of various displays of event and slow scan information sent from the transmitter unit via the low bandwidth channel.
  • the unit may also include a serial communication interface providing listed output of all stored events at the transmitter unit. Additionally the unit may provide an interface to a P.C. to enable the local and remote upload and download of transmitter and receiver configuration details.
  • the system essentially consists of two matching equipments, a transmitter unit capable of accepting alarm and video information and sending this via a dial up telephone connection to a receiver unit for subsequent display and logging.
  • the receiver unit can have up to twenty associated transmitter units, only one of which may be connected at a time.
  • a microprocessor control and coordination subsystem (1) handles all the decision, monitoring and communication aspects of the unit.
  • Alarms are interfaced via the conditioning and protection circuit (2) to the alarm multiplexer (3).
  • Alarm scanning is performed under the control of the microprocessor (1) whereby each alarm is selected in turn and monitored using the alarm window comparator (4).
  • the status of each alarm is stored and also displayed if dictated by configuration details.
  • a separate alarm conditioning and protection circuit (5) and window comparator (6) is used for the special alarm "Tamper", whenever an intruder tries to destroy the system, its alarm sensors or wiring.
  • the event caused by an alarm signal can be made to cause one or more picture captures from one or more video sources v.
  • the video source selection switch (7) places the required video signal onto signal line (8) allowing sync separator (9) to provide synchronising pulses to pixel clock (10) and raster address counters (11). The binary address count provided by these counters changes every four pixels thus providing a count at one quarter of the fast scan rate.
  • the video signal (8) is also fed to video peak detectors (12). Under the control of the active area signal (13) the peak detectors pick out the blackest and whitest parts of the picture but only for those parts of the picture that are to be digitised.
  • the voltage output (14) from the peak white detector is then used to define the upper limit of digitisation level (corresponding to maximum digital code).
  • the voltage output from the peak black detector is used to define the lower limit of digitisation level (corresponding to minimum digital code).
  • the A/D convertor (16) uses the voltages from the peak detectors and provides a 6 bit output for each pixel. In order to interface with the video memory array at a slow enough cycle rate the digitised pixels are fed through the video shift register (17) so that the video memory storage rate is one quarter of the pixel sampling rate. Pixels are written into the video memory (18) under the control of the capture request logic (19).
  • the capture logic waits for the start of the next video field and then begins to issue write pulses to the memory (18) until the field is complete. Since the video memory can hold up to four pictures the identification of the store to be written is provided by the write store select signal (20). So that it is possible to determine exactly what area of the picture is being digitised the active area signal (13) is fed to the active area insertion circuit (21). This causes the digitised area to be shown on a monitor (M) in circuit (21). This causes the digitised area to be shown on the monitor in higher intensity and higher contrast than its surroundings.
  • the microprocessor will begin an auto calling sequence to a predefined telephone number via the telephone line interface (22).
  • data is transferred via the F.S.K. generator (23) and F.S.K. demodulator (24).
  • Dial tone detector (25) and Carrier detector (26) provide normal telephone line and modem supervision. Data is transmitted at all times except when a slow scan picture is requested by the receiver.
  • a low amplitude signal is sent from the F.S.K. generator (23) to the telephone line interface (22).
  • the telephone line interface (22) is so arranged that it's impedance partially matches that of the F.S.K. modulator when exchange battery is present and completely mismatches it when exchange battery is absent. This leads to a change in the amplitude of the reflected signal such that a low amplitude reflection occurs when partially matched and a high amplitude when not matched.
  • This signal is in turn either detected or not by the carrier detector (26). The signal from the carrier detector then gives a direct indication of the presence or absence of exchange battery voltage.
  • the microprocessor When slow scan mode is entered the microprocessor begins to read pixel data from the video memory array (18). This is achieved by the processor providing the address of the required pixel to the address selection multiplex (27). This address contains the store select identity in addition to the pixel address within the store. Once the address is set up the processor activates the pixel request logic (28) which waits for the next read access period and produces the required memory access signals to read the pixel and clock it into the pixel output latch (29). Pixels read in this way are passed through a buffer in the microprocessor to equalise timing and thence to the F.M. modulator (23). All timing and synchronisation signals are provided by the processor. To improve the ability of the receiver unit to accurately derive the slow scan timing signals from the demodulated F.M.
  • the phase of the transmitted F.M. carrier is synchronised to the leading edge of each slow scan line sync pulse. Since every line sync pulse has the same duration the phase of the F.M. carrier in relation to the trailing edge of the sync pulse will be the same irrespective of the data content of the previous line. Variation in timing for each line of slow scan caused by the high modulation index used is thus virtually eliminated.
  • an interlaced scheme is adopted. On the first slow scan field only the even memory rows are accessed. At the end of this field a second scan is started but this time the odd rows are accessed. To stop the picture at the receiver being interlaced with a previous picture the receiver writes both the odd and even rows on the first interlaced field.
  • Configuration information is maintained at the transmitter unit in an electrically eraseable PROM memory (1).
  • Data is thus non volatile but easily modified by suitable commands to the operating software. These commands are generated by a special programming software running on a standard P.C.
  • the P.C. can be connected directly to the transmitter unit or remotely via the data channel set up with a receiver unit. Remote configuration provides all the facilities of local configuration.
  • a microprocessor control and coordination subsystem (30) handles all the display, Man Machine Interface and communication aspects of the unit.
  • the telephone line interface (31) responds to an incoming call by passing the ringing voltage cadence to the microprocessor for assimilation. If all conditions are right then the microprocessor waits for a gap in the ring cadence and then answers the call by activating the line holding loop in the telephone line interface (31). After going on line the receiver attempts to establish data communication with the calling transmitter.
  • Serial data sent from the microprocessor is modulated for transmission by the F.S.K. modulator (32).
  • the signals thus generated are low pass filtered by filter (33) and passed to the telephone line interface (31) and thence to line.
  • band pass filter (34) to remove unwanted out of band noise and then to the F.S.K. demodulator (35).
  • the demodulated serial data is then passed to the microprocessor for error checking.
  • the carrier detect circuit (36) provides for the determination of the presence of both data and slow scan carrier tones.
  • a similar scheme is adopted for the detection of exchange battery voltage as used in the transmitter unit except that the dial tone detector is employed.
  • the dial tone detector (37) is used to confirm the presence of telephone dial tone before routing digits are sent to line when a call is initiated from the receiver. Outgoing calls are made when it is required to check a transmitter unit's operation in the absence of an alarm situation. When slow scan pictures are transferred from the transmitter unit the F.M.
  • the analogue slow scan signal is then passed to the analogue to digital converter (51) which produces a 7 bit output. Even though the transmitter unit only provides a 6 bit signal (equivalent to 64 gray shades) the extra gray scale resolution provided by the receiver's 7 bits (equivalent to 128 gray shades) provides for improved picture quality due to the analogue nature of the transmission scheme adopted.
  • the analogue slow scan signal is also fed to the sync separation circuit (52) where an accurate timing reference is obtained.
  • the Man Machine Interface on the receiver unit is provided via a dedicated keypad with integral indicators (38) for user prompting and command entry.
  • the monitor (39) provides for both a textual display (for information such as chronological event lists) and a picture display with associated textual identification at top and bottom.
  • the keypad and associated indicators (38) are driven directly from the microprocessor (30).
  • the monitor display (39) is handled as follows: Under the control of the microprocessor (30) the display controller (40) provides the required signals to access the picture and text memory (41).
  • This memory is made up of standard video DRAM (VRAM) and is thus, by nature, dual ported. The memory is arranged so that each screen pixel has one byte (i.e. 8 bits) associated with it.
  • Two serial channels are provided for connecting external data equipment.
  • One channel, the printer interface (47), provides for the connection of a standard serial printer thus allowing the hard copy logging of all event communication with the transmitter unit.
  • the second channel, the computer interface (48), provides for the connection of a configuration computer that can be used to read or write the receiver configuration memory (49) or remotely read or write the connected transmitter unit's configuration memory.
  • the receiver prompts the operator by an audible buzzer, a flashing indicator on the front panel (38) and the display of an identification message on the monitor (39).
  • the buzzer and flashing indicator are cancelled and the display changed to show a chronicological list of transmitter unit events.
  • Each event has displayed with it an absolute time of occurance.
  • the time shown for each event is not provided directly by the transmitter unit but is calculated by the receiver from a relative time sent by the transmitter unit along with each event.
  • the time reference for the events in any one communication call is the first significant event of the call (i.e. the event that initiated the call). All subsequent events are timed in relation to this first event.
  • the receiver When communication is established between the transmitter and receiver units the receiver must determine the absolute time that relates to the time of the first or reference event. This is achieved by having the transmitter unit send its current relative time reference as soon as communication is achieved. By substracting this relative time from its current absolute time (by means of a watch T e.g. provided in the Receiver Unit) the receiver determines the absolute time for the reference event. All subsequent absolute event times are the obtained by simply adding the relative time sent with the event to the absolute reference event time.
  • a full screen low definition picture can be transmitted in 8 seconds.
  • a full screen high definition picture can be transmitted in 32 seconds. If three or four pictures have been stored at the transmitter unit then a quad picture of 3 or 4 low definition pictures can be transmitted in 32 seconds.
  • Once transmitted the operator has the option to re-transmit the same picture in the same or different format. The same format may be chosen if telephone line noise has corrupted some important detail of the picture. An alternative format may be chosen if, for instance, a picture was originally transmitted in low definition and it is thought that more picture detail would be useful.
  • the receiver In addition to the event related picture capture and transmission the receiver also provides for continuous monitoring from any one or all four transmitter video sources. By pressing the relevant slow scan key the receiver instructs the associated transmitter unit to first capture and then send pictures in any one of the three formats. Re-transmission is again provided as described for eventrelated pictures.
  • the receiver unit also provides remote control and tellback of the relays at the associated transmitter.
  • the fault log maintained by the transmitter unit can be read on request as an aid to system fault location.
  • the transmitter (fig. 1, 53 fig. 3) and/or receiver units (fig. 2, 54 fig. 3) are used in conjunction with a non-wired low bandwidth connection such as Cellnet (Cellular Network) or radio telephone 56.
  • a non-wired low bandwidth connection such as Cellnet (Cellular Network) or radio telephone 56.
  • the dialled digits from either transmitter 53 or receiver 54 can be inhibited allowing a direct or presetected communication path to be used.
  • Radio transceivers 55 for wireless communication can be integrated into associated transmitter 53 or receiver 54 if required.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Alarm Systems (AREA)
  • Closed-Circuit Television Systems (AREA)

Claims (19)

  1. Integriertes Schmalband- und Alarmsystem mit
    - Mitteln (1) zum Empfangen von Ereignisdaten von externen Alarmvorrichtungen (2, 3, 5) und Bilddaten von einer oder mehreren Videoquellen (7) von zu überwachenden Grundstücken,
    - Mitteln (1, 18) zum Speichern der besagten Daten,
    - Mitteln (1, 18) zum Bereitstellen eines ersten Schmalband-Halbbilds durch Zugriff auf eine erste Menge der besagten gespeicherten Daten,
    - Mitteln (1, 18) zum Bereitstellen eines zweiten Schmalband-Halbbilds durch Zugriff auf eine sich von der ersten Menge der besagten gespeicherten Daten unterscheidende zweite Menge,
    - Mitteln (1, 23, 24) zum Übertragen der besagten Halbbilder nach Auftreten eines Alarmereignisses über einen vorgebbaren Kanal mit geringer Bandbreite zu einem vorgebbaren Empfänger,
    - mit dem besagten Empfänger verbundenen Mitteln (39) zur Anzeige eines auf dem besagten ersten oder besagten zweiten Halbbild beruhenden ersten Bilds und nachfolgender Vervollständigung des besagten Bilds durch ein zusätzliches auf dem entsprechenden anderen Halbbild beruhendes zweites Bild.
  2. Integriertes Schmalband- und Alarmsystem nach Anspruch 1, weiterhin mit
    - Mitteln (1, 23, 24) zur Übertragung der besagten gespeicherten Daten nach Auftreten eines Alarmereignisses über einen vorgebbaren Kanal mit geringer Bandbreite zu einem vorgebbaren Empfänger,
    - mit dem besagten Sendermittel verbundenen Mitteln (1) zur Bestimmung einer aktuellen relativen Zeit zwischen einem eine Kommunikationsverbindung zum Empfänger einleitenden Referenzalarmereignis und nachfolgenden Ereignissen,
    - mit dem Empfänger verbundenen Mitteln (30) zur Bestimmung der absoluten Zeit, die auf die Zeit des Referenzalarmereignisses bezogen ist, indem bewirkt wird, daß das Sendermittel seine aktuelle relative Zeit sendet und indem diese relative Zeit von einer am Empfänger vorliegenden aktuellen absoluten Zeit abgezogen wird,
    - mit dem Empfänger verbundenen Mitteln (30) zur Bestimmung der absoluten Ereigniszeit eines nachfolgenden Ereignisses durch Hinzuaddierung der mit dem nachfolgenden Ereignis übermittelten aktuellen relativen Zeit zur absoluten Zeit des Referenzalarmereignisses,
    - mit dem besagten Empfänger verbundenen Mitteln (39) zur Anzeige der besagten übertragenen Daten zusammen mit der Vorkommniszeit.
  3. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 oder 2, wobei die besagte erste Menge gespeicherter Daten eine erste Menge von Speicherzeilen wie beispielsweise ungerade Zeilen definiert und die besagte zweite Menge gespeicherter Daten eine zweite Menge von Speicherzeilen wie beispielsweise geradzahlige Zeilen definiert.
  4. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 3, mit Mitteln (7) zum Videoeingangsschalten, womit die Auswahl einer der besagten Videoquellen ermöglicht wird.
  5. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 oder 4, mit Warteschlangenmitteln (18, 1, 40, 30, 41) zum Speichern der besagten Ereignisdaten und besagten Bilddaten in zeitlich geordneter Reihenfolge.
  6. Integriertes Schmalband- und Alarmsystem nach Anspruch 5, mit Zeitmeßmitteln (30, 1), die so ausgelegt sind, daß die relative Zeit nach vom Warteschlangenmittel gespeicherten Ereignissen zusammen mit dem zugehörigen Ereignis gespeichert wird.
  7. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 6, mit einer oder mehreren Ereignis- und Schmalband-Speicher- und Übertragungseinheiten, die den Funktionen der Ereignis- und Schmalbandspeicherung und -übertragung zugeordnet sind, und einer oder mehreren Ereignis- und Schmalbandempfangs- und Anzeigeeinheiten, die der Funktion von Ereignis- und Schmalbandempfang und -anzeige zugeordnet sind.
  8. Integriertes Schmalband- und Alarmsystem nach Anspruch 7, wobei die besagte Speicher- und Übertragungseinheit folgendes umfaßt:
    - ein Mikroprozessor-Steuermittel (1) zum Koordinieren aller Aktivitäten der Einheit und Behandeln von Ereignisdaten und Schmalbandübertragung,
    - einen Speicher (18) zum Speichern von digitalen Videoinformationen, der vom besagten Mikroprozessorsteuermittel ausgelesen werden kann
    - ein Alarmeingabemittel (4) zum Anschließen von externen Alarmmeldevorrichtungen an das Mikroprozessorsteuermittel,
    - ein Alarmanzeige-(D)Mittel zum Anzeigen des Zustands der externen Alarmmeldevorrichtungen,
    - ein Datenmodulations- und -demodulationsmittel (23, 24) zur Übermittlung von Zustands- und Steuerinformationen über einen Kanal (22) geringer Bandbreite, und
    - ein Schmalband-Modulationsmittel (23) zur Übertragung von Schmalband- Bildinformationen.
  9. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 7 oder 8, wobei besagte Ereignis- und Schmalband-Empfangs- und Anzeigeeinheit folgendes umfaßt:
    - ein Mikroprozessorsteuermittel (30) zum Koordinieren aller Aktivitäten der Einheit und Behandeln von Ereignisdaten und Schmalbandempfang
    - einen Speicher (41) zur Speicherung von digitalen Videoinformationen, der vom Mikroprozessorsteuermittel beschrieben werden kann
    - ein Datenmodulations- und -demodulationsmittel (32, 35) zur Übermittlung von Zustands- und Steuerinformationen über einen Kanal geringer Bandbreite
    - ein Schmalband-Demodulationsmittel (50) zur Aufnahme von Schmalband-Bildinformationen und
    - ein Schnittstellenmittel (38, 47, 48) zur Bereitstellung einer Ausgabe der besagten Ereignisdaten zu externen Einrichtungen.
  10. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 9, mit
    - Mitteln (1, 23) zum genauen Ableiten der Schmalband-Taktsignale aus einer demodulierten FM-Wellenform durch Aufsynchronisieren der Phase eines übermittelten FM-Trägers auf die Vorlaufflanke jedes Schmalband-Zeilensynchronimpulses.
  11. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 10, wobei das Bilddatenspeichermittel (18) so ausgelegt ist, daß die Bilddaten stets in hoher Auflösung gespeichert werden, und das System Mittel zur Anzeige der Bilddaten in unterschiedlichen Auflösungsstufen und zur Übertragung der Bilddaten mit unterschiedlichen Geschwindigkeiten entsprechend den Auflösungsstufen umfaßt.
  12. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 11, mit Mitteln (22, 26, 37) zur Überwachung des Kanals mit geringer Bandbreite wie beispielsweise einer Telefonleitung durch Erkennung der Amtsbatteriespannung.
  13. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 12, mit Mitteln (1) zum Aufstellen einer definierbaren Folge von Bildern für jedes Alarmsignal je nach der Beschaffenheit des Alarmsignals und der Systemkonfiguration.
  14. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 13, mit Mitteln (1, 12, 51), die Video-Spitzenwertdetektoren (12) zum Definieren der oberen und unteren Digitalisierungsgrenze über einen vorbestimmten Bereich enthalten und/oder Mitteln (51) zum Umwandeln der Empfangsbilddaten in Daten mit höherer Auflösung, um maximale Bildgüte zu erreichen.
  15. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 14, mit Mitteln (36, 37) zur Bestimmung des Vorhandenseins von sowohl Daten- als auch Schmalband-Trägertönen und/oder zum Überprüfen der Funktion einer Sendereinheit bei Abwesenheit einer Alarmsituation.
  16. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 15, wobei ein einziger Kanal mit geringer Bandbreite wie beispielsweise eine Telefonleitung sowohl für Steuerdaten- als auch für SchmalbandBildinformationsübertragung benutzt wird.
  17. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 1 bis 16, wobei das System für Mobilanwendung ausgelegt ist, wo entweder das Sendermittel (Figur 1, 53) und/oder das Empfängermittel (Figur 2, 54) mit Mitteln (55) zur Bereitstellung einer drahtlosen Kommunikation verbunden sind.
  18. Integriertes Schmalband- und Alarmsystem nach Anspruch 17, wobei das besagte Mittel (55) mit dem Senderund/oder Empfängermittel (53, 54) integriert ist.
  19. Integriertes Schmalband- und Alarmsystem nach einem der Ansprüche 17 oder 18, wobei eine kleine eigengespeiste Einheit (57, 58) bereitgestellt wird, die besagte Sendermittel (53, V) oder besagte Empfängermittel (54, TV) und entsprechende Mittel (55) für die drahtlose Kommunikation umfaßt.
EP89912440A 1989-07-17 1989-10-30 Integriertes langsames abtastungs- und alarmsystem Expired - Lifetime EP0483140B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP89307232 1989-07-17
EP89307232 1989-07-17
PCT/EP1989/001294 WO1991001539A1 (en) 1989-07-17 1989-10-30 Integrated slow scan and alarm system

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EP0483140A1 EP0483140A1 (de) 1992-05-06
EP0483140B1 true EP0483140B1 (de) 1995-02-08

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EP (1) EP0483140B1 (de)
AT (1) ATE118286T1 (de)
AU (1) AU4513189A (de)
DE (1) DE68921079T2 (de)
WO (1) WO1991001539A1 (de)

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GB2288300A (en) * 1994-04-05 1995-10-11 Christopher Robert Turner Video surveillance system using spread spectrum radio communication
WO2005027068A1 (en) * 2003-09-12 2005-03-24 Canon Kabushiki Kaisha Streaming non-continuous video data

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AU520219B2 (en) * 1978-08-25 1982-01-21 Commercial Data Processing Ltd. Video security alarm system
EP0028933A3 (de) * 1979-11-09 1981-06-03 Ascotts Ltd. Überwachungssystem
FR2593309B1 (fr) * 1986-01-23 1990-02-16 Gestion Inf Nle Et Dispositif et procede de surveillance a distance de sites comportant des moyens de detection d'evenements anormaux, des moyens d'ecoute phoniques et des moyens d'observation video
EP0290548B1 (de) * 1986-11-25 1994-05-04 ZONE TECHNOLOGY PTY. Limited Digitales bilderfassungssystem

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ATE118286T1 (de) 1995-02-15
DE68921079T2 (de) 1995-08-10
AU4513189A (en) 1991-02-22
WO1991001539A1 (en) 1991-02-07
DE68921079D1 (de) 1995-03-23
EP0483140A1 (de) 1992-05-06

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