Video frame signature capture
US5862150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1997 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Oct 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/277
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for performing signature analysis of video data being output by a RAMDAC so that starting and stopping the sampling of data is made precise so that the data sampled is a known set. The invention uses a timing generator and signature analysis hardware integrated with a RAMDAC to start and stop the sampling and signature calculation of video data on frame boundaries. A signature capture request bit is used to request that the next frame be sampled and a signature calculated. The hardware waits until the beginning of the next frame starts, and then samples data until the frame ends. The calculated signature is made available in a signature analysis result register for reading. The resulting signature is held in the signature analysis result register until cleared or another signature capture request is made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.