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- 01-24-2012 09:42 AM #1
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MPEG4 vs MPEG2 explanation
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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?
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- 01-24-2012 10:13 AM #2
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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.
Originally Posted by rrob311 
- 01-24-2012 10:27 AM #3
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Here
is a comparison between Mpeg2 and Mpeg4.
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- 01-24-2012 11:00 AM #4
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Simplified simply - for a given bandwidth, mpeg4 will result in less degradation, higher quality, than mpeg2.
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- 01-24-2012 01:15 PM #5
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Proud Staff Memberalso 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 TPWinegard 76cm dish, SG2100 motor, Sadoun dual KU LNB..... Directv Slimline SWM 3 LNB.... GeoSatPro 36" dish with Sadoun dual KU LNB... Coolsat 5000 on motorized.... Manhattan RS1933....Directv HR34 (yes the 5 tuner monster) GeoSatPro 200 to aim dishes.... few receivers not set up yet
Two 6 foot Fortec dish with GeoSatPro dual C-Band LNB "ghetto moved" to various C-Band satellites
- 01-25-2012 05:00 AM #6
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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.Current systems: 2X Visionsat IV-200 PVRs; Pansat 2700; Digitrans DTE-7150 DVB/Digicipher II; Twinhan and Nexus-S PC DVB cards; SiliconDust HDHomeRun ATSC/QAM networked tuners; fixed 1 meter Channel Master dish with Eagle Aspen P870 FSS Ku-Band stacked LNB; 2X 3ABN 36" dishes with Invacom QPH-031 Ku/DBS-Band LNBFs on Moteck SG-2100 H-H motors; fixed Sadoun SD180G 1.8 meter dish with Eagle Aspen B1SAT STACK C-Band stacked LNBF; Winegard Square Shooter OTA DTV antenna
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