24p

In the video processing referred 24p a video format (used or typically 23,976 frames per second, based on if NTSC equipment) at 24 frames per second (Hertz ) is recorded or played back. The "p " stands for the English term progressive scan.

24p is the standard format for movies. It has been already established in the 1920s as an international standard in film recording and projection and placed compromise Flickerarmut and footage costs that also the introduction of the Tonfilmes was added, which on the one required a constant frame rate, thus the speed of the sound remained the same, on the other hand only had a frame rate of at least 24 frames per second to an acceptable sound quality. In order to reduce still visible flicker, use a lens shutter cinema projectors, the once or twice a concealed each film frame while its projection short, so that it (48 Hertz) or even three times (72 Hertz) is displayed twice.

In contrast, television images are usually transmitted in the interlaced method, which was justified by the technical possibilities when using a CRT television. Also on DVD recorded movies are so reproduce, with a few exceptions in some special players, but could not prevail on the market.

With the introduction of Blu -ray Disc ( and HD DVD ) and high-resolution system is a way been provided to store movies in their natural cadence at 24 frames per second. This is, for example, as 1080p/24, that is, a resolution of 1920 × 1080 pixels at 24 fps referred. On the packaging so coded films usually find corresponding instructions.

With the ability to 24p playback equipped Blu -ray player can output via an HDMI cable, these films directly to a playback device ( TV or video projector). If this is done depends on whether the player to receive a corresponding 1080p/24-Signals is capable and transmits corresponding called EDID information about the connection configuration of the player.

Further processing of the incoming via the HDMI cable the image signal on the playback can be done differently, with different effects on the displayed image, especially with movements in the film. Each method has advantages and disadvantages.

The " kinematografischste " approach is to increase the frame rate as in cinema projectors at 48 or 72 frames per second by two or three times one after the other displays each image (so-called 2:2 - or 3:3 pulldown ).

Another approach is to not simply display one or two follow-up images of each " original image " as repetitions, but based on the next image to be displayed to calculate an intermediate image to represent cash movements.

Finally, there are also players that make the 24p film a 60 -Hz sequence, what the normal frame rate of flat panel corresponds to (so-called 3:2 pulldown, which is also used in television stations prior to the transmission of films ).

To be able to easily integrate video in the context of movie production, video cameras have been developed that can accommodate in 24p (eg HDCAM ). This trend was later followed camcorder and digital SLR cameras. The popular from about 2008 expectant AVCHD format provides for such formats.

Directors such as Peter Jackson and James Cameron are committed to the replacement of 24p by the HFR format, which is controversial.