#23.98 timecode calculator 720p#

Raw 23.98 frame per second video has no fields. Video at 29.97fps pulled from a 23.98 source has some duplicate fields. These 23.98 progressive frames per second of video can be fed raw to HD or computer monitors, or interlaced to 59.94 fields per second and played on nearly any monitor. HD producers wanting the 'film look' will shoot in 24p, which is typically 23.98fps, so no speed adjustment is necessary before adding telecine-style pulldown to create what is usually called 30fps video. This reduces the pulldown speed to what is commonly referred to as 23.98fps, which if you happen to be following along with a calculator is actually 23.976fps.

If a video or film camera shoots a true 24.00fps, its playback must be slowed by 0.1 percent (1/1000) to simulate the effect of changing the reference from 60Hz to 59.94Hz before or during the pulldown process. Some newer equipment, such as sync generators, production switchers and high-end EFP cameras, offer a choice between 59.94 or 60.00. Therefore, everything broadcast over the air must be easily convertible to NTSC standards. These viewers and rebroadcasters represent the lowest common denominator of the video world in the U.S., which remains NTSC. There are many viewers still watching NTSC televisions by using ATSC converters for off-air reception, or using cable or satellite providers that still deliver standard NTSC signals.

#23.98 timecode calculator 720p#

Both 1080i and 720p mathematically match downconverted SD video. It delivers 59.94 progressive frames per second. The 720p format, as specified by SMPTE 296M and used by ABC, FOX and ESPN, has no fields. HDTV in the 1080i format, as fed to and rebroadcast by most NBC, CBS and PBS affiliates, is at 59.94 fields per second. SMPTE 294M specifies SDI at a 29.97 frame rate and a 59.94 field rate for SD and 1080i or p. Today's broadcast video common denominator is SDI, either SD or HD.