670 reputation
57
bio website careers.stackoverflow.com/rsp
location Warsaw, Poland
age 33
visits member for 1 year, 10 months
seen 41 mins ago

Rafał Pocztarski
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My Stack Exchange flair

I've been fixing code for fun and profit - since 1986 and 1996, respectively - today most of my time I am a fanatic JavaScript programmer and a full-stack Web developer for hire focused on DevOps, who allegedly mumbles “lambda calculus” while sleeping.

Me online:

Profiles on Stack Exchange:


Jun
28
awarded  Autobiographer
Apr
14
awarded  Guru
Sep
23
awarded  Yearling
Jan
2
awarded  Good Answer
Jan
1
awarded  Necromancer
Nov
4
awarded  Quorum
Oct
27
revised What is the difference between 1080p, 1080P and 1080i?
more info on how to choose the right format
Oct
27
revised What is the difference between 1080p, 1080P and 1080i?
adding clarification of the time of pixel capturing
Oct
27
revised What is the difference between 1080p, 1080P and 1080i?
better explanation and better language
Oct
27
comment What is the difference between 1080p, 1080P and 1080i?
@techie007 I actually agree that progressive scanning is more desirable in almost every case, and in fact I hate the fact that interlaced video is still being used today for HDTV just because some 90 years ago people couldn't build a mirror drum-based television fast enough for progressive scanning of 64 lines of resolution. Though I'm not sure if specifically 1080p is more desirable in almost every case than 1080i. In any case, the "serious inaccuracies" was not really meant to describe your comment in particular and I think I really have to change my answer to make it more clear. Thanks. :)
Oct
27
comment What is the difference between 1080p, 1080P and 1080i?
@Les But you are right that on a CRT screen where every pixel is actually flashing at a slightly different time they should also be captured at a slightly different time to perfectly reproduce the reality (but it would be less than 1/60 s because there is some time for vertical retrace). I believe that it was true for first TV cameras that had no memory and could only capture "pixels" at the exact time when they were being broadcast (I put "pixels" in quotes because for analog video you only really have lines with no clear pixel boundaries.)
Oct
27
comment What is the difference between 1080p, 1080P and 1080i?
@Les Every pixel of a frame in progressive video is captured at the same time (all have the same timestamp). That is why you can take a pause and you don't have skewed objects that are in fast motion. (Also, every pixel of a field in interlaced video is captured at the same time.) The term "progressive scanning" is a little bit misleading, it used to be called "sequential scanning" which is maybe better, but all it means that it is just noninterlaced with no reference to the actual time of capturing every pixel. Maybe I'll update my answer to make it more clear.
Oct
26
awarded  Nice Answer
Oct
26
revised What is “Interlacing” when referring to a computer monitor or display?
add relevant tags
Oct
26
awarded  Necromancer
Oct
26
suggested suggested edit on What is “Interlacing” when referring to a computer monitor or display?
Oct
26
awarded  Organizer
Oct
26
revised What is the difference between 1080p, 1080P and 1080i?
adding relevant tags
Oct
26
revised What is “Interlacing” when referring to a computer monitor or display?
more info
Oct
26
suggested suggested edit on What is the difference between 1080p, 1080P and 1080i?