[BC] Radio audio delay for TV

[Bernie Courtney]

Some of that delay comes from the local affiliate in what they are doing in
house, looping through coord rooms to do inserts/news promos, tossing delays
in the mix to correct lip sync issues in their plant, etc, and then of
course the transmission path involved (digital STL/uplink = more delay).

in short it'd be dam near impossible to ever pinpoint the delay since its a
constantly changing value, even during a program.

Some cable systems also take feeds (Cablevision and Time Warner do in this
area as does DirecTV) whereas others take stuff off the bird or OTA and then
bounce it back up to one of their own birds (Dish Network) tossing another
variable in the mix if you are getting your feed via cable or DBS.

bern


On 6/1/06, WFIFeng at aol.com <WFIFeng at aol.com> wrote:
>
> In a message dated 06/01/2006 02:03:42 AM Eastern Daylight Time,
> radiotech at bellsouth.net writes:
>
> >  It seemed that most
> >  of the shifting occurred around the commercial breaks. I was unable to
> >  confirm if it was creeping inside the program segments.
>
> They're probably using the TV equavalent to the "CA$H" audio box... based
> on
> user settings, it looks for and "secretly" snips-out silences in a
> program,
> with the purpose of giving the broadcaster more time for spots. Adding :60
> seconds to an hour is quite undetectable, because the bits it drops are
> rather
> small. Start cranking it up to drop more, and it becomes noticable.
>
> I noticed this a couple years back when "Who wants to be a Millionaire"
> was
> popular, and they had an online version you could play as the show aired.
> When
> I tuned in to the local UHF station on my portable (next to the computer)
> I
> noticed a considerable time-shift from what was coming through the Cable
> System
> that my wife was watching. It also varied when the spots aired. If memory
> serves, the Cable version was in sync with the online, but the local was
> not... it
> may have been the other way around, I don't quite remember. It sure did
> seem
> odd, though.
>
> Now, we just have to deal with the very annoying pixellation on the YES
> channel, every time the scene changes quickly. The codec is a tad slow, it
> seems.
>
> Willie...
>
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