ABSTRACT
Until the advent of digital technologies and before file-based workflow, the video industry (as NTSC or PAL) had a common denominator by which it exchanged content (i.e., picture and audio essence). The coaxial cable interface, per the SMPTE 170 standard, was the fundamental real-time interface used to move video content between one device and another. Audio would be carried on a separate interface, and the storage medium of choice was a relatively few different video (or audio) tape formats. The analog successor, SDI (SMPTE 259M and SMPTE 292M), further provided for a common, consistent, and standardized transport between devices regardless of how the original essence was stored on the medium where it was generated or transported.
