Deblock QED

Revision as of 15:36, 16 October 2013

Introduction

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.

Required Filters

• DeBlock
• MaskTools2 2.0a48+
• DCTFilter

Parameters

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

quant1 int = 24

Strength of block edge deblocking.

quant2 int = 26

Strength of block internal deblocking.

aOff1 int = 1

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

aOff2 int = 1

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

bOff1 int = 2

"Sensitivity to detect blocking" for borders.

bOff2 int = 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.

uv int = 3

Deblock chroma:

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

Examples

AviSource("Blah.avi")
Deblock_QED(25, uv=false)

Changelog

 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 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 2010-08-18: (Bi11)
     - Replaced AddBorders with PointResize
     - Changed Quant and Offset defaults to 18,19,3,4,1,1 to reduce blurring
 Changes 2010-10-16: (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.
      (see for details: http://forum.doom9.org/showthread.php?p=810932#post810932)
 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.

Links

• Doom9 Forum - Discussion about the updated_Deblock_QED_MT2.

• Doom9 Forum - Didée's 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.

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