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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 ...
A timecode (alternatively, time code) is a sequence of numeric codes generated at regular intervals by a timing synchronization system. Timecode is used in video production , show control and other applications which require temporal coordination or logging of recording or actions.
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 .
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 Society of Motion Picture and Television Engineers (SMPTE) (/ ˈ s ɪ m p t iː /, rarely / ˈ s ʌ m p t iː /), founded in 1916 as the Society of Motion Picture Engineers or SMPE, [1] is a global professional association of engineers, technologists, and executives working in the media and entertainment industry.
Control track longitudinal timecode, or CTL timecode, developed by JVC in the early 1990s, is a unique technique for embedding, or striping, reference SMPTE timecode onto a videotape. Similar to the way VITC timecode is embedded in the vertical interval area of a video signal, CTL timecode embeds SMPTE timecode in the control track area of ...
With the introduction of SMPTE timecode in the early 1970s, engineers began to use computers to perfectly synchronize separate audio and video playback, or multiple audio tape machines. In this system, one track of each machine carried the timecode signal, while the remaining tracks were available for sound recording.
The DVCAM SDTI has video data at the top, control data in the middle (Timecode, etc.) and audio at the bottom just like it is organised on the tape. Because SDTI is used for compressed data the area used is less than a full screen; this allows for faster than realtime transfers. SDTI is standardized as SMPTE 305M.