The frame rate ( more precisely, frame rate ) is a term used in film and video technology. It denotes the number of images or motion phases, which are recorded or played in a per unit time. A sufficiently high frame rate makes the persistence of advantage and allows the viewer to perceive a sequence of frames as a continuous sequence.
With the English expression frames per second (abbreviated fps, in German: (picture ) frame per second), the number of frames per second is called.
Current frame rates are 24 Hz (many movies ), 48 Hz (with modern and high quality produced movies and 3D cinema ), 50-60 Hz (for television and computer games).
The human brain takes from about 14 to 16 frames per second (individually different) consecutive images as moving (but not necessarily smooth ) Scene true, which is why the frame rate in the early days of motion pictures ( silent era ), in accordance with an experimental phase at 16 images was determined per second. At the second international congress of film producer from Paris 1909 1000 images were set in the minute. Many late silent films were, however, with the higher frame rate, such as 22 frames per second, recorded. With the introduction of sound, the frame rate to 24 Hz has been set.
A recording of the image sequence at a lower frame rate, as demonstrated later, is called motion. Conversely, it is called in a higher frequency of slow motion.
Even with cameras can be found nowadays to specify the frame rate as indicator for the rate can be photographed in sequence with the images. It should be noted that their digital cameras maximum frame rate often can only hold out a few photos because the image files can not be saved as soon as they are received, especially when a rather slow memory card used.