Why do camcorders use interlacing?
"Do you think you journal 25 frames per second when you make a movie next to your digital camcorder?
Not quite.
Your digital camcorder does the following:
Records 50 pictures per second, intermixing every 2 consecutive pictures (with partially the height) into 1 frame.
In fact, you don't give the name them pictures, but fields. So 2 field are mixed into 1 frame. This mixing is called interlacing."
So why don't camcorders freshly record 25 frames a second instead of 50 field a second? It sounds easier and there's no ugly interlacing.
Answers: Greetings,
The 50 field that you mentioned are for a interlaced PAL camcorder. In the US is NTSC. NTSC uses 60i or 60 fields per second.
Interlacing have been the mundane format for many years. In certainty, most all the TV that you own watched up until the final couple of years (if you have upgraded your TV unit) is interlaced.
Interlacing be what gave tube that "smooth" look. 30 or 24 (film) progressive mode is less smooth. You can see a big difference if you to a hurried pan contained by 24p mode on a camcorder.
But, basically the interlacing be to give a smoother statue and to make things look better to the eyeball. There have been a shift and very soon 24p or 30p are desired.
Hope that helps.
Jeff
Seattle, WA
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