Displaying Movie Content On A TV
As movies are usually filmed at a rate of 24 frames per second, while television sets operate at different rates, some conversion is necessary. Different techniques exist to give the viewer an optimal experience.
The combination of content production, playback device, and display device processing may also give artifacts that are unnecessary. A display device producing a fixed 60 frame/s rate cannot display a 24 frame/s movie at an even, judder-free rate. Usually, a 3:2 pulldown is used, giving a slight uneven movement.
While common multisync CRT computer monitors have been capable of running at even multiples of 24 Hz since the early 1990s, recent "120 Hz" LCD displays have been produced for the purpose of having smoother, more fluid motion, depending upon the source material, and any subsequent processing done to the signal. In the case of material shot on video, improvements in smoothness just from having a higher refresh rate may be barely noticeable.
In the case of filmed material, as 120 is an even multiple of 24, it is possible to present a 24 frame/s sequence without judder on a well-designed 120 Hz display (i.e., so-called 5-5 pulldown). If the 120 Hz rate is produced by frame-doubling a 60 frame/s 3:2 pulldown signal, the uneven motion could still be visible (i.e., so-called 6-4 pulldown).
Additionally, material may be displayed with synthetically created smoothness with the addition of motion interpolation abilities to the display, which has an even larger effect on filmed material.
"50 Hz" TV sets (when fed with "50 Hz" content) usually get a movie that is slightly faster than normal, avoiding any problems with uneven pulldown.
Read more about this topic: Refresh Rate
Famous quotes containing the words displaying, movie and/or content:
“One of the grotesqueries of present-day American life is the amount of reasoning that goes into displaying the wisdom secreted in bad movies while proving that modern art is meaningless.... They have put into practise the notion that a bad art work cleverly interpreted according to some obscure Method is more rewarding than a masterpiece wrapped in silence.”
—Harold Rosenberg (1906–1978)
“All you need for a movie is a gun and a girl.”
—Jean-Luc Godard (b. 1930)
“In America the taint of sectarianism lies broad upon the land. Not content with acknowledging the supremacy as the Diety, and with erecting temples in his honor, where all can bow down with reverence, the pride and vanity of human reason enter into and pollute our worship, and the houses that should be of God and for God, alone, where he is to be honored with submissive faith, are too often merely schools of metaphysical and useless distinctions. The nation is sectarian, rather than Christian.”
—James Fenimore Cooper (1789–1851)