Halo removal & understanding quantization matrices

[John Jay]

annoying thing about mpeg2 sd compression is that pretty much every encoder out there puts halos on your encoded footage when it was not present on the original footage.

I've tracked this down to the quantization matrices that are used. Even an advanced product like cinemacraft says nothing about how to adjust them in the supplied documentation although it has a matrix editor built-in.

so I turn to you good forum folks...

what are the magic numbers to put in the matrices to get halo-free encodings.

[Emre Safak]

That is just an artifact of sharpening. I found it objectionable on the computer, but invisible on T.V. How did you view it?

[John Jay]

Originally Posted by Emre Safak

That is just an artifact of sharpening. I found it objectionable on the computer, but invisible on T.V. How did you view it?

yes I am aware, but its the values the matrices that cause it...


I see it from pro crt's to crappy low cr lcds

[Emre Safak]

The right place to dig for such information is undoubtedly doom9.org. Here is what I found:

• HC Encoder & Matrices
• Matrices of the HC Encoder

[John Jay]

Originally Posted by Emre Safak

The right place to dig for such information is undoubtedly doom9.org. Here is what I found:

• HC Encoder & Matrices
• Matrices of the HC Encoder

thanks for diggin' around Emre. it seems not even doom people know what the matrix values should be / or their significance.