MPEG4 vs MPEG2 explanation

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rrob311

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SatelliteGuys Pro
Nov 25, 2010
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New England
I am confused as to the difference between mpeg2 and 4. I have a channel on cband that says telever mpeg4 and I am not sure what the difference is supposed to be. If somebody can put this in layman's terms it would help me out a lot. The quality on this channel doesn't seem any different. Does it have something to do with how compressed the signal is?
 

oblio

SatelliteGuys Family
Oct 24, 2011
92
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the cloud
Does it have something to do with how compressed the signal is?

Essentially...yes but not just the level of comperession but how the signal is compressed. Requires different and faster hardware/software to decode compared to Mpeg 2. With HD signals using up so much band width they had to go the next step to Mpeg 4. If your receiver isn't mpeg 4 capable you can't decode the mpeg 4 signal.
 

FaT Air

HOA Free Zone
Feb 27, 2010
6,668
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97W 48N
Simplified simply - for a given bandwidth, mpeg4 will result in less degradation, higher quality, than mpeg2.
 

Mr Tony

SatelliteGuys Pro
Supporting Founder
Nov 17, 2003
442
179
Mankato, MN
also in a transponder you can put more channels in the same bandwidth

as example MPEG2 HD is 2 channels (think the PBS mux on 125W)
MPEG4 HD I think you can get 4 or even 5 channels on a TP
 

Tron

SatelliteGuys Master
May 6, 2005
6,599
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Metro New Orleans, LA
MPEG4 is far more efficient, but requires faster processing power to decode.

DVD uses MPEG2, Blu-Ray uses mostly MPEG4, however some older titles are MPEG2.
 
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