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25p over 50i

25p over 50i



Frage von tillsen:
Oktober 2009

The Panasonic HPX-500 for example, can record 1080p over 50i.
What does this mean? Are not they clean 25 frames? Be joined to 25p from 50 fields in the camera ...?

Would be very glad if someone can give me an exact answer.

Thank you!



Antwort von pailes:

If I'm not mistaken it is called the "progressive segmented frame (s)". That means the current is outwardly not one of 50i signal to differentiate, but are not coded per frame, two fields but a full screen. In your NLE You must therefore take into account.

http://de.wikipedia.org/wiki/Progressive_Segmented_Frame



Antwort von TheBubble:

Most of the time meant that 25 (to include progressive) bitmaps, but these are recorded as 25 interlaced bitmap.








Antwort von marwie:

In simple terms that simply means that one frame is divided into 2 fields, which have the same time index during the recording process, the interlaced fields have a time delay. (ie, first is the 1st and then added the 2nd field). Hence we see on the PC with pure interlaced format one comb effect because (both staggered fields are displayed simultaneously) is not seen in over 50i to 25p.

Quote:
Are not they clean 25 frames?

However, the frames are clean, but they are not stored halt due to technical reasons rather than full frames as fields.

Quote:

Be joined to 25p from 50 fields in the camera ...?

No. conversely, the 25 frames are divided into 50 fields and for example stored on tape.




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