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SMPTE timecode on a clapperboard. SMPTE timecode (/ ˈ s ɪ m p t iː / or / ˈ s ɪ m t iː /) is a set of cooperating standards to label individual frames of video or film with a timecode. The system is defined by the Society of Motion Picture and Television Engineers in the SMPTE 12M specification. SMPTE revised the standard in 2008, turning ...
Standards documents may be purchased by the general public. Significant standards promulgated by SMPTE include: All film and television transmission formats and media, including digital. Physical interfaces for transmission of television signals and related data (such as SMPTE timecode and the serial digital interface) (SDI) SMPTE color bars
Vertical Interval Timecode (VITC, pronounced "vitsee") is a form of SMPTE timecode encoded on one scan line in a video signal. These lines are typically inserted into the vertical blanking interval of the video signal.
The SMPTE family of timecodes are almost universally used in film, video and audio production, and can be encoded in many different formats, including: Linear timecode (LTC), in a separate audio track; Vertical interval timecode (VITC), in the vertical blanking interval of a video track; AES-EBU embedded timecode used with digital audio
A digislate is a clapperboard with an inbuilt electronic box displaying SMPTE time codes. The timecode displayed on the clapperboard will have been jam synced with the internal clock of the camera, so that in theory it should be easy for the film editor to pull the timecode metadata from the video file and sound clip and synchronize them ...
A special bit in the linear timecode frame, the biphase mark correction bit, ensures that there are an even number of AC transitions in each timecode frame. The sound of linear timecode is a jarring and distinctive noise and has been used as a sound-effects shorthand to imply telemetry or computers .
SMPTE time code dates back to 1969, when the film and video tape timing standard proposed by the Society of Motion Picture and Television Engineers (SMPTE) was accepted by the American National Standards Institute (ANSI). SMPTE time code, usually a variant called LTC (linear time code), is an analog recording of a bi-phase modulated square wave ...
MIDI time code (MTC) embeds the same timing information as standard SMPTE timecode as a series of small 'quarter-frame' MIDI messages. There is no provision for the user bits in the standard MIDI time code messages, and SysEx messages are used to carry this information instead. The quarter-frame messages are transmitted in a sequence of eight ...