What is MacroBlocking? - AVS Forum
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post #1 of 13 Old 09-20-2004, 01:50 PM - Thread Starter
 
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Sorry if this is a dumb question, but....what is MacroBlocking? I've seen it mentioned in conjunction with several upconverting DVD players but have not been able to find a clear explanation of what it is.
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post #2 of 13 Old 09-20-2004, 01:53 PM
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Its an MPEG artifact when the bitrate is insufficient for the fast motion scenes that results in relatively large square blocks appearing.
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post #3 of 13 Old 09-20-2004, 02:22 PM
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OK, how about a simple explanation like that for the chroma bug.

Thanks

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post #4 of 13 Old 09-20-2004, 03:56 PM
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If macroblocking is the result of insufficient bit rate, how is this the fault of the player?
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post #5 of 13 Old 09-20-2004, 05:33 PM
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Quote:
If the player is optimized to reveal more details than are really there
Isn't this a good thing?
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post #6 of 13 Old 09-20-2004, 06:31 PM
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That's not really it.

If you look on pg 7 or 8 of the 3910 macroblocking thread, there are pictures posted by vetboy and rider that show it perfectly.

Basically, a player that has the "macroblocking problem", exagerates a specific type of MPEG2 compression artifact.

All players have this to some degree, and there are DVDs out there that are mastered with more compression that are more susceptible, but for some reason, the 3910 and 5900 tend to exhbit this "problem" more. It is very specific to certain displays and DVDs.

If it's not worth waiting until the last minute to do, then it's not worth doing.

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post #7 of 13 Old 09-20-2004, 06:58 PM
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Kevin, thanks. Those pictures show the macroblocking problem perfectly. I have seen this before on my setup (Z2/cheap Sony DVD), but wasn't sure what it was until now.
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post #8 of 13 Old 09-20-2004, 11:40 PM
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Yuppers. I have seen it on Pioneer, Panasonic, and Sony players too (the first Blade DVD). Just that for some DVDs and displays, it shows up more often with those two Denon players. Although... Expletive who had a 5900, and when he perfectly calibrated his display, the 3910 didn't have the problem to the extent the 5900 did:

http://www.avsforum.com/avs-vb/showt...69#post4374569

But then later on here's what Rider has to say:

http://www.avsforum.com/avs-vb/showt...30#post4380230

Me? I have a CRT HDTV with only component input, so I'm still leaning to get the 3910. :)

If it's not worth waiting until the last minute to do, then it's not worth doing.

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post #9 of 13 Old 09-21-2004, 04:24 AM
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Is macroblocking the same thing as "black ghosting"?

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post #10 of 13 Old 09-21-2004, 05:28 AM
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Is macroblocking the same thing as "snowballing"?
























































j/k :D
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post #11 of 13 Old 09-21-2004, 06:15 AM
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After seeing the movie "Clerks", I'd have to say no. :D

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post #12 of 13 Old 09-21-2004, 07:58 AM
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Quote:
Originally posted by Eddie Horton
After seeing the movie "Clerks", I'd have to say no. :D

I am glad you didn't say "from experience"! :D
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post #13 of 13 Old 09-21-2004, 08:00 AM
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No worries there!

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