Purpose of Deadzone?

[Sagekilla]

As the topic name suggests, what's the purpose of deadzone? I've pretty much modified most of the settings with the exception of deadzone.

Here's my commandline:
x264.exe --crf 20 --ref 4 --mixed-refs --no-fast-pskip --bframes 16 --b-pyramid --weightb --b-rdo --bime --direct auto --filter -3:0 --partitions all --8x8dct --subme 7 --me umh --hadamard --trellis 0 --aq-strength 0.5 --aq-sensitivity 15 --progress --threads auto --thread-input --cqm "H:\Matrices\prestige.cfg" --output "H:\Movies\300\Video.264" "source.avs"

It's the hadamard patched version that Dark Shikari put up, and I was wondering if tweaking the Deadzone settings could help me out at all.

[check]

deadzone controls the level of high prequency noise that is simply dropped before encoding. High deadzone means you get rid of expensive data to remove. Generally people modify the deadzone by reducing it because they are aiming to increase grain retention.

[krusty999]

-cqm "H:\Matrices\prestige.cfg"

For what tipe of content is this matrix, and where I can find?

Saludos.

[Sharktooth]

:search: