You're getting too technical for jp, snee:no:
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Indeed and it's not ideal. However it does seem to do a decent job.
Some tellies stretch evenly right across the image. Other leave the middle pretty much alone and stretch more as the get further from the middle. On the basis that people will be looking at the middle of the image most of the time and will see the rest in their peripheral vision.
Like I said it's really not ideal but it does a decent job, in my opinion.
Ewe mite notice some static or blobs, or whateva' wot aren't supposed to be there due to the mucking about with converting signals :unsure:
Depends a bit on how the stuff that goes through the converter is treated and so on.