Surveillance system for a video recording camera

(19)

(11)

EP 0 772 169 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	21.05.1997 Bulletin 1997/21

(43)	Date of publication A2:
	07.05.1997 Bulletin 1997/19

(21)	Application number: 96117232.7

(22)	Date of filing: 26.10.1996

(51)	International Patent Classification (IPC)⁶: G08B 15/00

(84)	Designated Contracting States:
	DE FR GB IT

(30)

Priority:

01.11.1995 US 551467

(71)	Applicant: THOMSON CONSUMER ELECTRONICS, INC.
	Indianapolis, IN 46206 (US)

(72)	Inventors:
	Mullis, Phillip Russell Indianapolis, IN 46227 (US) Tenner, Frederick William Greenfield, IN 46140 (US)

(74)	Representative: Hartnack, Wolfgang, Dipl.-Ing.
	Deutsche Thomson-Brandt GmbH Patentabteilung Göttinger Chaussee 76 30453 Hannover 30453 Hannover (DE)

(54)	Surveillance system for a video recording camera

(57) A surveillance system comprises a video camera (300) generating a video output signal (Vo) coupled to a video recorder (300A) having remote control capability. A motion detector (100) generates a signal (11) indicative of detected motion and responsive to the signal indicative of detected motion a control unit (200) generates a first control signal (21) for the video recorder (300A). The first control signal (11) initiates a recording mode in the video recorder (300A) and at cessation of the detected motion the recording mode is terminated. In the surveillance system described, battery powered operating time is extended by powering only the motion detector (100) during periods of inactivity. Recording media (300B) usage is conserved by only recording periods of detected motion and may be further conserved by recording only predetermined frames.

Search report