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SpHeRe31459
Premium Member
join:2002-10-09
Sacramento, CA

SpHeRe31459 to sofakng3

Premium Member

to sofakng3

Re: Does Comcast use 3 or 4 channels per QAM? (MPEG2 bitrates)

said by sofakng3:

In general, Dish is using around 4 - 6 Mbps (MPEG-4) and the last I checked Comcast is around 12 Mbps (MPEG-2).

In general, I'd think that Comcast should have a slight edge due to the 2x - 3x bitrate but I'm not sure...?

That's faulty logic, MPEG2 is an older and far less efficient compression algorithm than MPEG4/AVC (H.264). So you cannot directly compare bitrates.
sofakng3
join:2007-08-25
Kingston, PA

sofakng3

Member

Oh, I know that MPEG-4 can't be compared to MPEG-2 directly but in general I would think that MPEG-2 at 3x the bitrate should look better than MPEG-4. MPEG-4 completely beats MPEG-2 at low bit-rates though.

Although, MPEG-2 over-the-air (ATSC) is 19 Mbps and looks much, much better than MPEG-4 at 5 Mbps (i.e. Dish Network).

Therefore, I'm wondering how MPEG-2 at 12-14 Mbps would look against MPEG-4 at 4-6 Mbps...