SMPTE 424M is a standard published by

SMPTE The Society of Motion Picture and Television Engineers (SMPTE) (, rarely ), founded by Charles Francis Jenkins in 1916 as the Society of Motion Picture Engineers or SMPE, is a global professional association of engineers, technologists, and e ...

which expands upon

SMPTE 259M SMPTE 259M is a standard published by SMPTE which "describes a 10-bit serial digital interface operating at 143/270/360 Mb/s." The goal of SMPTE 259M is to define a serial digital interface (based on a coaxial cable), called SDI or SD-SDI. ...

SMPTE 344M SMPTE 344M is a standard published by SMPTE which expands upon SMPTE 259M allowing for serial digital interface bit-rates of 540 Mbit/s,SMPTE 344M allowing EDTV resolutions of 480p and 576p. This standard is part of a family of standard ...

, and

SMPTE 292M SMPTE 292 is a digital video transmission line standard published by the Society of Motion Picture and Television Engineers (SMPTE). This technical standard is usually referred to as HD-SDI; it is part of a family of standards that define a serial ...

allowing for bit-rates of 2.970 Gbit/s and 2.970/1.001 Gbit/s over a single-link coaxial cable. These bit-rates are sufficient for

1080p 1080p (1920 × 1080 progressively displayed pixels; also known as Full HD or FHD, and BT.709) is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the sc ...

video at 50 or 60 frames per second.SMPTE 292M The initial 424M standard was published in 2006, with a revision published in 2012 (SMPTE ST 424:2012). This standard is part of a family of standards that define a

serial digital interface Serial digital interface (SDI) is a family of digital video Interface (computing), interfaces first standardized by SMPTE (The Society of Motion Picture and Television Engineers) in 1989. For example, ITU-R BT.656 and SMPTE 259M define digital ...

(SDI); it is commonly known as 3G-SDI.

Formats

Within this standard, there are three formats: *Level A format is the direct mapping of uncompressed 1080p (up to 60 fps) video into a serial digital interface at the nominal 3 Gbit/s. That is, one video signal, one video stream, in one cable. *Level B-DL format is the mapping of dual-link HD-SDI/

SMPTE 372M SMPTE 372M is a standard published by SMPTE which expands upon SMPTE 259M, SMPTE 344M, and SMPTE 292M allowing for bit-rates of 2.970 Gbit/s, and 2.970/1.001 Gbit/s over two wires. These bit-rates are sufficient for 1080p video at 50 ...

(i.e.: 1080p up to 60 fps) in a single serial digital interface at the nominal 3 Gbit/s. That is, one video signal, two streams, in one cable. *Level B-DS format is the dual-stream carriage of two independent HD-SDI/SMPTE 292M signals (720p up to 60 fps or 1080i/1080p up to 30 fps) in a single serial digital interface at the nominal 3 Gbit/s. That is, two video signals, two video streams, in one cable.

References

Film and video technology SMPTE standards {{Tv-tech-stub