Search results
Results from the WOW.Com Content Network
Newer video standards support 120, 240, or 300 frames per second, so frames can be evenly sampled for standard frame rates such as 24, 48 and 60 FPS film or 25, 30, 50 or 60 FPS video. Of course these higher frame rates may also be displayed at their native rates.
This frame rate derives from the PAL television standard of 50i (or 50 interlaced fields per second). Film and television companies use this rate in 50 Hz regions for direct compatibility with television field and frame rates. Conversion for 60 Hz countries is enabled by doing 2:2:3:2:3 pulldown. [5]
In the color standard, this becomes rounded to the integer 286, which means the color standard's line rate is 4.5 MHz ⁄ 286 ≈ 15,734 + 266 ⁄ 1,001 Hz. Maintaining the same number of scan lines per field (and frame), the lower line rate must yield a lower field rate.
The standards support 1080p at 50, 59.94 and 60 frames per second; such frame rates require H.264/AVC High Profile Level 4.2, while standard HDTV frame rates only require Levels 3.2 and 4, and SDTV frame rates require Levels 3 and 3.1. [dubious – discuss]
3 Non-standard video. 4 In digital television only environments. 5 See also. ... Commonly used Frame rate = 30 frame/s black and white, 29.97 interlaced frame/s color;
No proposed or existing broadcast standard permits 720 interlaced lines in a video frame at any frame rate. [4] ... S=standard A/R=aspect ratio [7] [full citation needed]
CIF (Common Intermediate Format or Common Interchange Format), also known as FCIF (Full Common Intermediate Format), is a standardized format for the picture resolution, frame rate, color space, and color subsampling of digital video sequences used in video teleconferencing systems. It was first defined in the H.261 standard in 1988.
A frame or field rate can also be specified without a resolution. For example, 24p means 24 progressive scan frames per second and 50i means 25 progressive frames per second, consisting of 50 interlaced fields per second. Most HDTV systems support some standard resolutions and frame or field rates. The most common are noted below.