New Quantization Matrices - EQM V3 series (last update: 04/02/2005 - V3ULR)

[$in0bi]

I've got an artifact by using eqm v3hr matrix. You can see it in the right top corner.
http://i29.fastpic.ru/big/2011/1030/99/fd12cc1dd55cfa0d326df266f7374699.png

[Sharktooth]

It's highly improbable a quantization matrix can result in such an artifact unless the encoder and/or the decoder used is buggy.

[$in0bi]

It's highly improbable a quantization matrix can result in such an artifact unless the encoder and/or the decoder used is buggy.
But this artifact disappears only when I change the matrix or change bitrate. But with this bitrate and output size byte to byte the only decision is to change matrix, but if you think that your matrix is perfect that's nothing to discuss. Besides I've already reinstalled every codec and the result is the same. My friends told me that they saw such artifact when they had compared the matrices (eqmv3hr with others).

The answer from xvid.org:
From your pictures, I can just see that the problem _might_ indeed be related to custom quantization.

[neveja]

Sharktooth
What do you recommend for ripping on the matrix of 1CD (low bitrate 600-700kbps) - 'v3ulr', 'v3ulr_rev2' or 'v3ulr_rev3'?
Thanks in advance.

[henryho_hk]

http://forum.doom9.org/showthread.php?p=1250770#post1250770

".... on a sidenote eqm v3 ULR is obsolete since LCD displays. ...."

(You can still compare it with Jawor's 1CD matrix and see which one looks better for you.)

[SilaSurfer]

If u want more details, u can use EQM-v2 or EQM-HR-v3-SAP-mod. Make sure that u do have sufficient bitrate because VAQ makes them more prone to blocks and rings for frame peepers. (Actually, H263+VAQ tends to give running textures @ insufficient bitrates too.)

@ henryho_hk

At what compressibility level did you notice EQM-v3HR + VAQ to show blocks and ringing? I still use Xvid when it comes to SD material and this is my favorite CQM. I was thinking of using VAQ instead of my general setup where I restrict quantizers. I think VAQ should provide more fine quantizer distribution. My compressibility is very low. With compcheck <90%, bitrate range 1800 to 2400.

[henryho_hk]

@ henryho_hk

At what compressibility level did you notice EQM-v3HR + VAQ to show blocks and ringing?

About 45.

[orion44]

Description:
This is a HIGH BITRATE matrix designed to work at full anamorphic DVD res (720x432) with bitrates over 1600kbits (for an average motion movie) and works pretty well even with Q2 encodings or extremely High bitrates. But for that target there will be an Ultra-high bitrate matrix (EMQ V3UHR).

EQM V3HR:

8 10 10 10 11 11 13 15
10 10 10 10 11 12 14 16
10 10 11 11 13 14 16 18
10 10 11 13 15 17 19 23
11 11 13 15 19 22 26 29
11 12 14 17 22 28 34 41
13 14 16 19 26 34 44 55
15 16 18 23 29 41 55 72

15 15 15 15 16 17 19 22
15 15 15 15 16 18 20 23
15 15 16 17 19 20 23 27
15 15 17 19 22 25 29 33
16 16 19 22 28 32 38 43
17 18 20 25 32 41 50 60
19 20 23 29 38 50 66 81
22 23 27 33 43 60 81 106



Can I use this matrix on a downsized video (576x432) that still requires high bitrates (I will set it to 1900 kbps)?