Quantcast Anybody Tested the Bvcd Matrix? - digitalFAQ.com Forums [Archives]
  #1  
03-15-2005, 03:55 PM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by Dialhot
On a teste oui. Une matrice de plus.
La seule nouveaute c'est qu'il va bientot etre demande a VM d'arreter d'appeler son outil DIKO, le K signifiant "KDVD"...
My question is.
Does anybody here full tested that matrix?
I heard Dampos opinion and many other in VMesquita's forum, but not here.
Filesize is lesser than obtained with KVCD. Quality looks at less same than KVCD one.
Any valid opinion?
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  #2  
03-15-2005, 04:04 PM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Prodater64
Any valid opinion?
I did only one test so I can't really classify the matrix but it is as I said in french : just an other matrix.

I still use the KVCD one. And you should look more in dark areas IMHO.
(note: a lot of matrix give filesize smaller than KVCD-Notch. It is not aimed to reduce the filesize, but to reduce the artefacts).

More accurate opinion was given by Inc in moderator's section :
Quote:
Originally Posted by Incredible
I checked the Matrix, it does significantly cut more high frequencies. Thats why it results in more compression (just imho). To obtain an even more higher compression on KVCD/Bach1 etc. just replace the values of the last 2 right side columns to 99. But thats only a workflow if a simple TV set is your target or if captures are the source as a cut of highFreqs is highly visible at recent TV Sets.
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  #3  
03-15-2005, 04:12 PM
kwag kwag is offline
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Quote:
Originally Posted by Prodater64
Filesize is lesser than obtained with KVCD.
And so is the quality
Take a look on the upper left portion of the matrix, and you'll see there's no "Notch" pattern, which is what kills DCT blocks on low lit scenes and flat dark (gray ) walls with KVCD.
Not so with BVCD matrix

-kwag
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  #4  
03-15-2005, 06:30 PM
zerotype zerotype is offline
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I did'nt want so start a new thread so I decided to ask here (sorry if it is the wrong area), but what about trying certain mpeg-4 q-matrxies? I was wondering if it'd be worth to do a few test with.
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  #5  
03-15-2005, 06:54 PM
kwag kwag is offline
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Standard MPEG-4 matrixes are not very efficient, when applied to MPEG-1/2 encodings.

-kwag
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  #6  
03-15-2005, 09:09 PM
Dialhot Dialhot is offline
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And the opposite : I tried KVCD-Notch for doing Xvids... not good
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  #7  
03-15-2005, 09:21 PM
kwag kwag is offline
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Yep. You're 100% right
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