[mythtv] Test (crude) patch for commercial skipping
matt.jarvis at philips.com
matt.jarvis at philips.com
Tue Feb 18 17:07:14 EST 2003
On terrestrial UK television, there is a small black and white square
which appears in the top right hand corner of the frame briefly before an
advertisement, called a cue dot in tv production speak. This is used to
signal to certain equipment and personnel in the production chain that an
advertisement is approaching in 30 seconds I believe. There used to be
VCR's on the market which could detect the cue dot and pause. I don't know
if this helps, or even if it is used in digital broadcasting, I'll check
when watching TV tonight and see if it used on Sky's satellite service.
Detecting this dot in the frame would be a much more reliable method than
using blank frames, if it used everywhere, as it is always in the same
position and always contains the same number of pixels etc. since it is
machine generated and used to automate other equipment.
Matt Jarvis
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