Theory of operation of a scalar

[bzuidgeest]

This might not be the to most usual question, but do you know of any resources I can study to understand the inner workings of a solution like this?

I understand the separate parts. analog digital conversion, processing, output. But I have difficulty understanding how the input and output are mostly kept in sync. I expect some timing tricks and such, but I cannot seem to get my head around it. I

I understand this is not a teaching project and I don't expect you to write a tutorial or make a video or something, but with all these "scalers" on the market I cannot find much using google that explains the theory in any practical way.

If you know them could you point to some resources on the topic.

[IanSB]

@bzuidgeest

But I have difficulty understanding how the input and output are mostly kept in sync. I expect some timing tricks and such, but I cannot seem to get my head around it.

The sampling clocks and HDMI video output are kept locked to the source video using software phase locked loops so I suggest you search for info on "phase locked loops" and "genlock" (which is the term used for locking one video signal to another and that also uses phase locked loops)

[bzuidgeest]

Thank you, phase locked loops are something I only know from radios and such. I will try searching for it in combination with genlock. I already searched for genlock, but I get so many results for selling hardware. Hopefully adding "phase locked loop" to it will get me some theory. Seems this is one of those things nobody has written a tutorial for. Strange thing in a time where there is a tutorial for almost anything on the net.