24 A Word About 4:2:2 Screen Pixel Ratio
Description
This article is from the TeleVision Receive Only Satellite-TV FAQ, by TVRO Hobbyists drlev@hotmail.com with numerous contributions by others.
24 A Word About 4:2:2 Screen Pixel Ratio
Most DVB/MPEG-2 receivers receive what is called 4:2:0 screen ratio
for picture resolution. But certain DVB/MPEG-2 channels, usually
network and/or studio feeds, use what is called 4:2:2 screen
ratio. This involves the ratio of video data to vertical pixel and
horizontal pixel color. 4:2:2 is NOT part of the standard DVB
specifications but is used mainly by studios that need better picture
quality than standard DVB offers. This is the standard currently used
for in-the-clear reception of NBC, as well as Warner Brothers and Fox
network feeds. Most consumer FTA receivers cannot receive signals with
the 4:2:2 ratio; a more expensive receiver is required. Note that
4:2:2 is NOT a type of encryption; however, like certain types of
encryption, it does force the TVRO viewer to make certain
considerations when purchasing receiving equipment.
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