"SMPTE 424M" is a standard

Standardization

Standardization is the process of developing and implementing technical standards.The goals of standardization can be to help with independence of single suppliers , compatibility, interoperability, safety, repeatability, or quality....

 published by SMPTE which expands upon SMPTE 259M

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 , called SDI or SD-SDI....

, SMPTE 344M

SMPTE 344M

"SMPTE 344M" is a standard published by SMPTE which expands upon SMPTE 259M allowing for bit-rates of 540 Mbit/s, allowing EDTV resolutions of 480p and 576p.This standard is part of a family of standards that define a Serial Digital Interface....

, and SMPTE 292M

SMPTE 292M

SMPTE 292M is a standard published by SMPTE which expands upon SMPTE 259M and SMPTE 344M allowing for bit-rates of 1.485 Gbit/s, and 1.485/1.001 Gbit/s...

 allowing for bit-rates of 2.970 Gbit/s and 2.970/1.001 Gbit/s over a single-link coaxial

Coaxial

In geometry, coaxial means that two or more forms share a common axis; it is the three-dimensional linear analogue of concentric.Coaxial cable, as a common example, has a wire conductor in the centre a circumferential outer conductor and an insulating medium called the dielectric separating...

 cable. These bit-rates are sufficient for 1080p

1080p

1080p is the shorthand identification for a set of HDTV high-definition video modes that are characterized by 1080 horizontal lines of resolution and progressive scan, meaning the image is not interlaced as is the case with the 1080i display standard....

 video at 50 or 60 frames per second. The signal formats carried over SMPTE 424M are specified in SMPTE 425M.
This standard is part of a family of standards that define a Serial Digital Interface

Serial Digital Interface

Serial digital interface is a family of video interfaces standardized by SMPTE. For example, ITU-R BT.656 and SMPTE 259M define digital video interfaces used for broadcast-grade video...

; it is commonly known as 3G-SDI.