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Old 11-28-2009, 04:32 PM   #14  
1080PsF
Compression Sucks
 

Join Date: Jan 2006
Location: Monrovia, CA.
Posts: 737
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Quote:
Originally Posted by electrictroy View Post
I found this interesting table - http://broadcastengineering.com/mag/...atsc_standard/ - It's based upon 10 bits of luma and 10 bits of chroma:

- 720 480 x 30 interlaced == 207 Mbit/s (270 with overhead)
1280 720 x 30 progressive == 553 Mbit/s (742)
1920 1080 x 30 interlaced == 1244 Mbit/s (1485)

And those numbers have to be squeezed down to 19 Mbit/s or less.
SD is

858 * 525 * 29.97 * 20 = 269,999,730 bits or 270Mbps

720 HD is

1650 * 750 * 59.94 * 20 = 1,483,515,000 or 1.4835Gbps

1080 30 frame HD is

2200 * 1125 * 29.97 * 20 = 1,483,515,000 or 1.4835Gbps

1080 60 frame HD is

2200 * 1125 * 59.94 * 20 = 2,967,030,000 or 2.967Gbps
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