Deblock QED

Latest revision as of 18:23, 22 October 2022

[edit] Description

Designed to provide 8x8 deblocking sensitive to the amount of blocking in the source, compared to other deblockers which apply a uniform deblocking across every frame.

[edit] Requirements

• AviSynth 2.5.8 or later
• Progressive input only
• Supported color formats: YV12
• Width and height need to be mod8.

[edit] Required Plugins

Latest versions of the following filters are recommended unless stated otherwise.

• DctFilter
• DeBlock
• MaskTools2

[edit] Syntax and Parameters

DeBlock_QED (clip clp, int "quant1", int "quant2", int "aOff1", int "bOff1", int "aOff2", int "bOff2", int "uv")

clip  clp =

Input clip.

int  quant1 = 24

Strength of block edge deblocking.

int  quant2 = 26

Strength of block internal deblocking.

int  aOff1 = 1

Halfway "sensitivity" and halfway a strength modifier for borders.

int  aOff2 = 1

Halfway "sensitivity" and halfway a strength modifier for block interiors.

int  bOff1 = 2

"Sensitivity to detect blocking" for borders.

int  bOff2 = 2

"Sensitivity to detect blocking" for block interiors.

• aOff and bOff controls block detection and removal strength, for quant1 and quant2 respectively. See DeBlock for more information.

int  uv = 3

Deblock chroma:

• 2 : Copy chroma from source.
• 3 : Process chroma.
• 1/-1 : Process chroma with normal/strong Deblock().

[edit] Examples

Deblock_QED with default settings:

AviSource("Blah.avi")
Deblock_QED(quant1=24, quant=26, aOff1=1, aOff2=1, bOff1=2, bOff2=2, uv=3)

[edit] Changelog

 Changes 2011-11-29: (06_taro)
     - Replaced (chroma=uv>2?"process":"ignore") by (chroma=uv>2?"process":"copy") to avoid garbage clip when uv=2.
       The formal parameter is not used by MaskTools2 any more, if ever used.
       Foxyshadis once mentioned chroma="ignore" but I had never found a document containing it.

 Changes 2010-10-16: (Bi11)
     - Replaced 'relative' with the new 'mode' parameter in mt_LutSpa(), starting from MaskTools 2.0a45
     - Changed Quant and Offset defaults to 24,26,1,1,2,2 to increase effectiveness, but still within sensible limits.
      (Details: http://forum.doom9.org/showthread.php?p=810932#post810932)

 Changes 2010-08-18: (Bi11)
     - Replaced AddBorders with PointResize
     - Changed Quant and Offset defaults to 18,19,3,4,1,1 to reduce blurring

 Changes 2010-05-25: (Bi11)
     - Explicitly specified parameters of mt_LutSpa()
      (required due to position of new 'biased' parameter, starting from MaskTools 2.0a43)
     - Non mod 16 input is now padded with borders internally

 Changes 2008-08-18: (Didée)
     - Replaced the ugly stackXXX cascade with mt_LutSpa() (requires MaskTools v2.0a35)
     - Changed Quant and Offset defaults to 24,28,2,4,4,8

 Changes 2005-10-28: (Didée)
     - Initial release

[edit] External Links

• Doom9 Forum - Discussion about the updated_Deblock_QED_MT2.

• Doom9 Forum - Didée gives a short description of Deblock_QED and some insight on how Deblock_QED works. Also a good thread for other deblocking scripts and plugins.

• VideoHelp Forum - How to correctly use Deblock_QED with interlaced footage. Originally suggested by Didée. Additional information.

• VideoProcessing Forum - Didée's original Deblock_QED post. It's a very informational thread.

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