The word "Deinterlacer"

[Si]

Dear All,

I think that some of us old-timers think "Deinterlacing" is reserved for the conversion of interlaced true video (as from a old camcorder) thats meant for viewing on an interlaced display device (an old television) into something that looks OK on a progressive display (a computer display)

Some of you youngsters think it applies to removing any motion artifacts from anything whether it be orginally true video interlaced or not.

Now- language changes and we all have to roll with the times. :)

However, video work is confusing enough without us experts causing even more confusion.

So how about we use another word for removing motion artifacts from anything or we use another word for the old time "deinterlacer".

I don't want to get into a discussion about the original definition of "deinterlacer" because I was deinterlacing/decombing/PFRing before you were all born and I KNOW I'm right ;) but lets all get our act together over what we mean nowadays :)

All sensible and positive replies welcome.

regards

Simon:)

[scharfis_brain]

deinterlacing -> general removal of interlaced structures
decombing -> special case, where only fieldmatching gets applied
PFRing -> you mean progressive frame restauration?
is a special case of deinterlacing, too. Descibes restauration of blended streams...

I do not know, what to change on those words, they are okay....

[Arachnotron]

I'm a newbe on this stuff, but still..

Could I answer with a question:

You have 4 possibilities:

1.The video is processed frame by frame, and both fields represent the same point in time
2.The video is processed frame by frame, and both fields represent consecutive points in time
3.The video is processed field by field, and both fields represent the same point in time
4.The video is processed field by field, and both fields represent consecutive points in time

I think the first case is true progressive, and the fourth true interlaced.
The other two I am unsure about. Is interlaced related to the processing of a video field by field or is is related to there being only one field at any point in time?

[edit[ for me deinterlacing would be the process of getting to case 1 or 3.

As you can see, I'm confused already :D

[Arachnotron]

So how about we use another word for removing motion artifacts from anything or we use another word for the old time "deinterlacer".


How about 'frame recovery' or 'frame reconstruction' for the whole range of methods?
All methods in the end are about reconstructing a frame only containing info describing a single point in time.

[Si]

Never Mind :cool:
Forget I asked.:cool:

[trbarry]

Originally posted by Si
Dear All,

I think that some of us old-timers think "Deinterlacing" is reserved for the conversion of interlaced true video (as from a old camcorder) thats meant for viewing on an interlaced display device (an old television) into something that looks OK on a progressive display (a computer display)
.
.
.
I don't want to get into a discussion about the original definition of "deinterlacer" because I was deinterlacing/decombing/PFRing before you were all born and I KNOW I'm right ;) but lets all get our act together over what we mean nowadays :)

All sensible and positive replies welcome.

regards

Simon:)

I tend to use "deinterlacing" for the process of making progressive frames from interlaced material from interlaced video cameras. And I've always been most comfortable with "inverse telecine" or (obsolete) "pulldown removal" for reversing what the film telecine process does.

And since I wrote my first assembler language video function on a Radio Shack TRS-80 back about 1979 I'm not sure the last part of your statement is completely true for all of us.

But we learn to adjust. ;)

- Tom

[avih]

Originally posted by trbarry
...And since I wrote my first assembler language video function on a Radio Shack TRS-80 back about 1979 I'm not sure the last part of your statement is completely true for all of us....

lol, i did mine on a spectrum. about '86 ;) not a proper video function though. it was a smooth full screen scroller, synced to the v-sync signal ;)

nice to see ya tom, long time :)

avih