NYT has a story that talks about detecting even degraded quality of video and audio in the clips posted illegally at different sites on the web.
The new technological weapon is content-recognition software, which makes it possible to identify copyrighted material, even, for example, from blurry video clips.
The technology could address what the entertainment industry sees as one of its biggest problems — songs and videos being posted on the Web without permission.
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The systems being developed by companies like Audible Magic and Gracenote make use of vast databases that store digital representations of copyrighted songs, TV shows and movies.
When new files are uploaded to a Web site that is using the system, it checks the database for matches using a technique known as digital fingerprinting. Copyrighted material can then be blocked or posted, depending on whether it is licensed for use on the site.
This is a good area for research for computer vision and multimedia researchers. Several research projects tried to develop approaches to detect specific advertisements and similar parts. Now those techniques can be extended to do some ‘fingerprinting’ of each copyrighted content and could be used to for detecting presence even in degraded — intentionally or otherwis — quality copies.Â