“An engineer explained to us that hundreds of ear impressions were gathered in the name of research, and while each one obviously boasted its own unique shape and size, one single characteristic remained uniform across the board: the entrance into the ear canal is not a perfect circle, it's an oval.”
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My bad.. DVDs are only 8 Mbps...
Here is a list of bit rate compression for different formats, streaming services, and broadcasting/cable/satellite services:
http://blogs.zdnet.com/Ou/?p=962&tag=rbxccnbzd1
Another more in depth look at bit rate and compression schemes:http://blogs.zdnet.com/Ou/?p=511
And:
http://blogs.zdnet.com/Ou/?p=959
Take a look..