On Thu, 22 Apr 2010, Michael Havens wrote:

> when you watch and it goes to commercial sometimes they show less than one
> second of a commercial and then go to another one... anyone know why?

local 'drop in' adverts run on top of (in place of) the 
national feed; additionally one can buy differnt drop in's for 
different customers, as is a commonly pitched 'advanage' of 
placing adverts through a Cable operator.

Obviously clock synchronization down to the sub second is not 
attained as to 'cuts' between content feeds; when this 
happens, the 'blips' appear

You can see this kind of 'missed switching timing' a lot on 
CNBC and so forth

-- Russ herrold
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