I don't know if you have those tiny ads called bumps
Not normally. They seem to be becoming more prevalent -- particularly on satellite and cable channels.
Often, a series of films on a particular channel will be sponsored by a particular advertiser, and they'll get a tiny ad at the beginning/end of each ad break -- Stella Artois have been doing this recently.
And the logo of the station that's omnipresent in the corner of the screen, supposedly but not really noninvasive is called a bug
Again, this is restricted to the satellite and cable channels, but I can see it becoming more prevalent.
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roger