Also known as frame frequency, it is the number of frames or images that are projected or displayed per second. The term applies equally well to film and video cameras, computer graphics, and motion capture systems. For film, television, or video frame rates are used in synchronizing audio and pictures. Frame rate is most often expressed in frames per second (FPS) and is also expressed in progressive scan monitors as hertz (Hz). The higher the frame rate, the smoother the animation will appear but the more processing power and system bandwidth is required. The frame rate for video is related to the number of electrical current cycles per second. Mean current in most of the Americas runs at 60 Hz, while current in Europe and much of Asia runs at 50 Hz. In 60 Hz systems, frame rate for video typically runs in factors of 60, making 30 and 60 FPS the most common video frame rates. In 50 Hz systems, 25 and 50 FPS are most common. In motion pictures and television, the frame rates are standardized by the Society of Motion Picture and Television Editors (SMPTE). SMPTE Time Code frame rates of 24, 25 and 30 frames per second are common, each having uses in different portions of the industry.

back to F

  • Править страницу