“SMPTE 424M”的意思、由来-开放百科全书

词条

SMPTE 424M

释义

References

SMPTE 424M 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 a single-link coaxial cable. These bit-rates are sufficient for 1080p video at 50 or 60 frames per second.^[1] The initial 424M standard was published in 2006, with a revision published in 2012 (SMPTE ST 424:2012).^[2]

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 (up to 60 fps) video into a serial digital interface at the nominal 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 the nominal 3 Gbit/s. 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 the nominal 3 Gbit/s.^[3]

This standard is part of a family of standards that define a Serial Digital Interface; it is commonly known as 3G-SDI.

References

1. ^SMPTE 292M
2. ^{{cite web|title=ST 424:2012 3 Gb/s Signal/Data Serial Interface|url=http://standards.smpte.org/content/978-1-61482-714-6/st-424-2012/SEC1|publisher=SMPTE|accessdate=1 June 2015}}
3. ^{{cite web|title=Advice on the use of 3 Gbit/s HD-SDI interfaces|url=https://tech.ebu.ch/docs/techreports/tr002.pdf|work=European Broadcasting Union (EBU) Technology & Innovation Department|accessdate=26 April 2014|location=Geneva|date=July 2011|pages=7, 17-20, 23-24, 27}}

2 : Film and video technology|SMPTE standards

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