Method and apparatus for extending video content analysis to multiple channels

• US 6,985,603 B2
• Filed: 08/13/2001
• Issued: 01/10/2006
• Est. Priority Date: 08/13/2001
• Status: Expired due to Fees

• Current Assignee: Uniloc 2017 LLC (FIG LLC (d/b/a Fortress Investment Group LLC))
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Cohen-Solal, Eric, Lyons, Damian, Gutta, Srinivas, Brodsky, Tomas
• Primary Examiner(s): Miriam, Daniel
• Assistant Examiner(s): Choobin, Barry
• Application Number:
  US09/928,795
• Publication Number:
  US 20030031343A1
• Time in Patent Office: 1,611 Days
• Field of Search: 382/103, 382/107, 382/236, 382/298, 382/106, 703/8, 348/169, 348/211.5, 348/159, 348/441, 348/154, 348/153, 348/143, 342/357.07, 342/357.15, 235/411, 386/98
• US Class Current: 382/103
• CPC Class Codes: G08B 13/19602 Image analysis to detect motion of the intruder, e.g. by frame subtraction
• CPC Class Codes: G08B 13/19645 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
• CPC Class Codes: G08B 13/19693 using multiple video sources viewed on a single or compound screen

Abstract

A video content analysis system extends content analysis capability of one system to multiple channels by providing for the spatial multiplexing of the multiple channels and appropriately analyzing the spatially multiplexed video signal. The resulting system may be lower in cost that present systems and permit the system to work with ancillary equipment such as video recorders. The system also preserves the real-time information inherent in the multiple source signals.

Claims

1. A method of analyzing content in video data, comprising the acts of:

spatially multiplexing said video data such that every frame of video of multiple scenes is spatially distributed in a single composite video stream, at least part of each of said video data being apportioned to a respective part of a moving image defined by a resulting multiplexed moving image; and

performing computerized operations on the content of said multiplexed video image such that data in others of said each of said video data is ignored to produce an analysis particular to one of said multiple scenes.

2. A method as in claim 1, wherein said at least part of each of said video data is a subsampled moving image.

3. A method as in claim 1, further comprising recording said multiplexed moving image.

4. A method of analyzing multiple video channels, comprising the acts of:

non-selectively spatially multiplexing multiple video data sets at said multiplexer to produce a spatially multiplexed moving image; and

performing computerized operations on at least a first portion of said spatially multiplexed moving image, said first portion corresponding to a first of said channels;

said step of performing computerized operations include ignoring data in said multiplexed moving image corresponding to channels other than said first of said channels.

5. A method as in claim 4, further comprising recording said multiplexed moving image on a video recorder.

6. A method as in claim 5, wherein said step of performing computerized operations includes spatially demultiplexing said multiplexed moving image such as to produce multiple moving images, each corresponding to a respective one of said channels.

7. A method as in claim 6, wherein said spatially multiplexed moving image contains multiple frames, each frame comprising a spatially separate parts of said multiplexed moving image, each part corresponding to a respective one of said channels.

8. A method as in claim 4, wherein said step of performing computerized operations includes spatially demultiplexing said multiplexed moving image such as to produce multiple moving images, each corresponding to a respective one of said channels.

9. A device for analyzing video content on multiple channels, comprising:

an input adapted to receive spatially multiplexed video data;

a controller programmed to select spatially distinct portions of said multiplexed video data received from said input, each of said spatially distinct portions respective of a particular video data channel;

said controller being further programmed to perform computerized operations on said spatially distinct portions such that data from one spatially distinct portion does not interfere with the analysis of another spatially distinct portion.

10. A device as in claim 9, wherein said spatially multiplexed video data contains frames, each of which is divided into separate subframes, each of said subframes each corresponding to a different scene imaged by a respective camera.