SMPTE 424M
SMPTE 424M is a standard published by SMPTE that extends the SMPTE 259M, SMPTE 344M, and SMPTE 292M standards. Here are bit rates of 2.970 Gbit / s and 2.970 / 1.001 Gbit s over a single-link / coax cable allows. These bit rates are sufficient for 1080p video at 50 or 60 frames per second. The original 424M standard was published in 2006, a revision was published in 2012 (SMPTE ST 424: 2012).
Within this standard there are three formats known as Level A, Level B Dual Link (B-DL) and Level B Dual Stream (B-DS).
The Level A format is the direct mapping of uncompressed 1080p video (up to 60 fps) to a serial digital interface with a nominal 3 Gbit / s, that is, a video signal, a video stream, in a cable.
The Level B-DL format is the mapping of dual-link HD-SDI / SMPTE 372M (i.e. 1080p up to 60 fps) in a single serial digital interface at nominally 3 Gbit / s. The Level B-DL format is the mapping of dual-link HD-SDI / SMPTE 372M (i.e. 1080p up to 60 fps) in a single serial digital interface at nominally 3 Gbit / s. That is, one video signal, two streams, in one cable.
The 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 nominally 3 Gbit / s. That is, one video signal, two streams in one cable. That is, two video signals, two video streams, in one cable.
This standard is part of a family of standards that define a serial digital interface; it is commonly known as 3G-SDI .
Individual evidence
- ↑ Digital Library | Society of Motion Picture & Television Engineers. Retrieved April 9, 2020 .