[mythtv-users] Obama Recommends Delay in Digital TV Switch
yahoo at vapourforge.com
Mon Jan 12 00:29:21 UTC 2009
David Brodbeck wrote:
> Drew Tomlinson wrote:
>> OK, I have to ask. Now while I agree that sending "all the signal to
>> the rich neighborhoods" is silly, there certainly appears to be
>> occasions when commercials are much louder than the programming.
> My guess is the peak level is no higher, but that they're compressing
> the dynamic range so that more of the audio is at peak loudness. This
> is perceived as louder and "punchier" than uncompressed audio, because
> our idea of how loud something is is related to the average level more
> than the peak level. Also, if you're watching a movie, movie
> soundtracks often have dialog and such at a fairly low level so that
> they have room to go louder for things like explosions.
> Sometimes commercials also use Dolby Pro Logic encoding to send audio to
> the back channel speakers, if you have surround sound.
> Now, in the case of locally-inserted commercials on cable TV systems,
> there may actually be a difference in peak level. I've noticed that
> most cable TV systems do a really incompetent job equalizing the volume
> levels between channels and between locally-inserted content and network
They typically do compress the audio up to maximum volume, so they talk
at the same level as the explosions.
I believe they also spread the audio over a wider spectrum to get yet
more volume out of it.
They are trying to get you to still hear it when you leave the room.
I *heart* commercial skip ;->
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the mythtv-users