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Forum: Avisynth Usage 26th July 2023, 20:15
Replies: 21
Views: 5,108
Posted By Dogway
A bit busy today but will have a look tomorrow. I...

A bit busy today but will have a look tomorrow. I also made a shader to blur luma/chroma given the signal bandwidth so maybe I can correlate a few things. Mainly to start of I would only change the...
Forum: Avisynth Usage 6th July 2023, 04:36
Replies: 21
Views: 5,108
Posted By Dogway
First of all, sorry for the wrong figures since...

First of all, sorry for the wrong figures since the YUVtoYIQ is wrong in many places, including the Wikipedia. I double checked and added the proper derivations. The post above was edited with the...
Forum: Avisynth Usage 4th July 2023, 19:32
Replies: 21
Views: 5,108
Posted By Dogway
I guess it's right? You can try to demodulate it...

I guess it's right? You can try to demodulate it to check if it passes the roundtrip test. The Crosstalk matrix is defined here...
Forum: Avisynth Usage 4th July 2023, 18:29
Replies: 21
Views: 5,108
Posted By Dogway
You have an example here...

You have an example here (https://github.com/libretro/slang-shaders/blob/master/ntsc/shaders/maister/ntsc-pass1-encode-demodulate.inc) or this one...
Forum: Avisynth Usage 4th July 2023, 15:56
Replies: 21
Views: 5,108
Posted By Dogway
For modulation and demodulation you have to...

For modulation and demodulation you have to rotate the signal 90º, for that you use sin and cos, for QAM specifically read over here...
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