Methods and apparatus for use in surveillance systems
US7508941B1 · kind B1 · utility
112Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2003 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Jun 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/181
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A control signal is provided to a video data acquisition system that generates video data. In response to receiving the control signal, the video data acquisition system modifies at least a portion of the video data to produce an output signal. Authenticity of the output signal from the video data acquisition system is verified by checking that the video data includes modifications according to the control signal. If the video data does not include such modifications, it is known that the video data acquisition system needs to be checked for tampering or system failures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.