SMPTE timecode

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The SMPTE time code (Time Code) is one of the Society of Motion Picture and Television Engineers introduced (SMPTE) time code synchronized in television, radio and studio area that devices from different manufacturers and any video and audio techniques together that support this standard. It is defined in documents ST 12-1 and ST 12-2 of the SMPTE, which were last updated in 2014. He is required to, for example, in synchronization to run exactly the same time as film, music and Geräuschmix and the eventual synchronous recording or any record to.

SMPTE timecode diagram

The time is given in the format of an eight-digit absolute time, which is also divided into frames (hh: mm: ss: ff). There is always a master and subordinate slaves (slaves). The master specifies the SMPTE timecode position. One device controls the playback (and thus the position on a tape or in computer-aided hard disk recording systems), which all connected devices follow.

Today the SMPTE time code in the recording studio is often controlled by the computer as the master (in sequencers ). This is usually done via special interfaces , but there are now also inexpensive complete solutions that offer this connection in addition to audio or MIDI inputs. The signal is transmitted, for example, with a cinch cable .

With this standard, the SMPTE in 1967/69 succeeded in clearing up the chaos of various competing timecodes. This standard is still of great practical importance today.

Individual evidence

  1. ST 12-1: 2014 : Time and Control Code
  2. ST 12-2: 2014 : Transmission of Time Code in the Ancillary Data Space

Web links