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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 ...
Unlike standard SMPTE timecode, MIDI timecode's quarter-frame, and full-frame messages carry a two-bit flag value that identifies the rate of the timecode, specifying it as either: 24 frame/s (standard rate for film work) 25 frame/s (standard rate for PAL video) 29.97 frame/s (drop-frame timecode for NTSC video)
In video production and filmmaking, SMPTE timecode is used extensively for synchronization, and for logging and identifying material in recorded media.During filmmaking or video production shoot, the camera assistant will typically log the start and end timecodes of shots, and the data generated will be sent on to the editorial department for use in referencing those shots.
The sync pattern in bits 64 through 79 includes 12 consecutive 1 bits, which cannot appear anywhere else in the time code. Assuming all user bits are set to 1, the longest run of 1 bits that can appear elsewhere in the time code is 10, bits 9 to 18 inclusive. The sync pattern is preceded by 00 and followed by 01.
With one exception, VITC contains the same payload as SMPTE linear timecode (LTC), embedded in a new frame structure with extra synchronization bits and an error-detection checksum. The exception is that VITC is encoded twice per interlaced video frame, once in each field, and one additional bit (the "field flag") is used to distinguish the two ...
MusicPrinter Plus contained some advanced mechanisms for its day, including playback of articulations and synchronization to SMPTE and other time code. References [ edit ]
[7] [8] Ravenna is compatible with AES67 and all relevant mechanisms, protocols and formats used for synchronization, transport and payload mandated by AES67 are fully supported. Ravenna contributed to the SMPTE 2110 standardization efforts. [a] Ravenna is compatible with the audio parts SMPTE ST 2110-30 [10] and -31.
The core constraints are specified in SMPTE ST 2067-2 (Core Constraints). [4] An example of an application is Application #2E, which is specified in SMPTE ST 2067-21 [7] and targets studio masters. One of the plugins is the Immersive Audio Bitstream Level 0 Plug-in, which is specified in SMPTE ST 2067-201 [8] and adds support for immersive sound.