![]() ![]() Displaying these field pairs at the same time does not produce any artifacts and provides better results than television monitors do. But unlike a standard television signal where each field is 1/60th or 1/50th of a second apart many of these field pairs contain data from the same frame of film. Therefore, an interlaced video created from a film contains pairs of fields. This process is repeated so that odd and even fields are sent in the order Ao Ae Ao Be Bo Ce Co Ce. A first film frame is used to create two video fields, and then a second film frame is used to create three video fields. Conversion from PAL to NTSC is done by repeating every fifth video field with a process called 3:2 pulldown. Two sequential fields are created from the same frame and displayed 1/50th of a second apart. Conversion from NTSC to PAL is done by simply playing the film fast - at 25 fps. ![]()
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