[BC] IBOC AM Quality

[Goran Tomas]

--- At 23.3.2007 12:52, Robert Orban wrote: ---
>If you use exactly the same processing on the HD and FM analog 
>channels and modulate each one to its permitted peak level, the HD 
>will be 5 dB louder when the receiver crossfades. THAT would drive 
>the listener nuts. Instead, you use 5 dB less limiting on the 
>digital channel, the receiver fades smoothly from analog to digital, 
>and the digital sounds much less grungy if the analog FM is heavily procesed.

Whoever included that 5dB difference in the standard, did a service 
to everybody... It now implicitly forces digital audio to be less 
processed even if the station's CE/GM/PD prefers heavy processing, at 
least in this transition period with analog FM still alive (which may 
prove to be quite long). It is a clean start and a chance for radio 
to have better audio.


Regards,
Goran Tomas