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Old 20th May 2020, 01:33   #12  |  Link
user58
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Join Date: May 2020
Posts: 6
i appreciate your help (yes bobbing would be my first choise having the current information)

"motion detection" vs "others"
https://youtu.be/YczLRshnxQ8?t=236

"progressiv scan" vs "deinterlacing Interpolation"
https://upload.wikimedia.org/wikiped...lacingani3.gif

there is a lot information on the internet saying different things
or rather they both right depending on what question is made, some information seems to be missleading

for example there is info that the "pixelrate/sample rate/frequency modulated"is 3 mhz (or precise 3,375 MHz)
but then saying thats useally not the case and and it is common to use use 13,5 mhz for this (ITU-R BT 601)
on some other website it says DVCAM (DV SDL) from sony use 12 MHz for this

then there is the 50 hz or 50 frames question
getting a "pixel momentum" would lead to a higher amount of pixels/colors

the most internet sources also say 4:2:0 is MPG and JPEG compression

the most internet sources claim 4:4:4 to be the best to give 1 example would be this 1:
https://en.wikipedia.org/wiki/File:Colorcomp.jpg


sure the picture is progressed by all of this stuff somehow
that might lead to the open the question to read the data/waves that are being processed directly from the tape heads
and emulate them together as an image
this would make certain the data was read 1:1

having equivalent 335×576 pixels comes with a new question why do i record the image in 720 x 576?
the chroma going 40*576 (i assume 576 is vertical/y?)
then the pixels would be some like 4:0,5:4 "pixel chroma information?"


i dont know much about vhs i not even know if the 50 frames are full pictures
if i assume they are lines and not full pictures that raise new questions

some information say they are frames called "even field/odd field" are they lines are they full frames ? are the 50 or 60 lines or fullframes ?

the pictures i took dont look different from the example i repostet
progressiv made the best quality (interlacing looked very smooth but lower resolution and lagging)
progressiv had the line artefacts

it looks like the colorcomb.jpg example from above
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