Sorry - I was using the same definition of compression, dynamic range, as you. It came to mind when I noticed a similar result on CTV's feed during Tuesday's SVU episode, though knowing their occasionally iffy level control (apply proper dialnorm to all ads plznthx) it's just as likely the episode was mixed that way.

If Global's analog feed sounds just as crunched as their digital feed, then my guess is that they're applying compression and limiting necessary for keeping audio within NTSC limits to the audio signal before it is routed to the analog and digital encoders. If the analog feed is remarkably better, then Global is doing something very wrong on their digital feed. I won't speculate any further for the moment, but I will ask some folks at work how we're handling output levels.