XDS contains codes as to a shows content: sports, news, etc. There is a code for "advertisement", but after looking at a few hours of tape (US broadcasts: NBC news, Wheel of Fortune, then various prime-time shows), decoding the XDS, I never saw an ad actually have that code set - the broadcasters are not dumb. Also, the XDS info is not continuous; the show is identified only every minute or so, or less. So even if the ads identified themselves in XDS, they would not do so for seconds to minutes into them, and by then you've watched too much of them already - a few seconds would be far too much. Automatic ad detection is ultimately doomed to fail, much like the US "Star Wars" missle defense: the counter-measures will always be easier to implement than the initial measures. However, the broadcasters won't bother with implementing the counter-measures until the "measures" are widely used, so early-adopter hackers could enjoy commercial-free viewing for a while, until everyone starts doing it. Consider "web page scrubbers" that remove those annoying ads (particularly if flashing) from web pages. They work mostly based on the size of the ads, which tend to be standard. Varying the size a few pixels in either direction without changing the original image would be trivial, but I don't think anyone is doing that yet. The reason: hardly anybody runs the scrubbers. I don't, although I guess I would if there was one for Linux. When scrubbers become common, then the owners of pages displaying ads will care, and then scrubbers will be easily defeated. A previous posting of mine suggests one way (the only way?) to remove commercials: use a web-based data base with the start/stop times of all commercials, on all channels, maintained by volunteers who want to watch TV and do the world a service at the same time. Or maybe they can be paid, if anyone can figure out how to make a (legal) business out of it. Peter K "Marco A. Sousa" wrote: > Peter Lohmann (Peter.Lohmann@xxxxxxx) wrote: > > > > > > > In your list of 'hints' that a commercial is playing (for analog TV) you > > could include some analysis of VBI data. For example, most commercials > > in the US do not display CC data (some do). You can also look at XDS > > Could U elaborate more on this? > Do u know some place we can find more info about XDS/close caption? > I've tried cc programs that come with xawtv , but it only show random data. > > Regards, > Marco > > _______________________________________________ > Video4linux-list mailing list > Video4linux-list@xxxxxxxxxx > https://listman.redhat.com/mailman/listinfo/video4linux-list
