[BC] DTV Audio Levels

[RichardBJohnson at comcast.net]

I don't think it would take more than a few milliseconds to process the audio. There shouldn't be an resynchronization problems because synchronized audio was delivered with the video. Synchronization problems come into play when one has multiple paths for both the video and the audio. The TV station already has synchronized audio available from the network. Extracting digital audio from the composite signal is a trivial operation, with the maximum latency determined by the dictionary length in the compression. This is all "realtime" as far as audio is concerned, consuming a few tens of audio frequency cycles, maximum. Actual signal processing is instantaneous when related to slow varying information like audio.

Cheers,
Richard B. Johnson
Book: http://www.AbominableFirebug.com/

----- Original Message -----
From: "Cowboy" <curt at spam-o-matic.net>

On Tuesday 16 June 2009 09:53 am, Jim Tonne wrote:

>  And, Richard, how would you do that without losing
>  "lip sync"?  This has been pointed out before; the video
>  would have to be delayed the same amount of time.

 And that was the whole point !
 Lip sync is not something we deal with in radio, but it
 is a very big deal in TV.