SMPTE 292M
HD -SDI, the "High Definition Serial Digital Interface ", according to the standard SMPTE 292M, is the predominant connection for the transmission of uncompressed video signals for HD, digital intermediate and digital cinema in the studio and production environment.
When two HD-SDI connections are interconnected by two cables, according to the SMPTE 372M standard, and 2K data may be transmitted from digital cinema cameras. The setting of two SMPTE 292M connections on a single cable summarizes the SMPTE 424M standard together.
About all HD -SDI connections image metadata and sound can be transmitted. HD -SDI is mainly found in professional video equipment; for consumers to lower performance interfaces have been established. HD -SDI devices are found mostly only in studios, rental houses and cinemas.
A relatively new field of application is the use of video surveillance systems, where images can be transferred from special HD cameras over existing coaxial cable installations on this standard. Thus enables HD -SDI in this sector high-resolution images without complete conversion to IP video.
Standards
Metadata
SMPTE 292M HD -SDI supports transmission of metadata, in addition to the picture and sound information. Examples are text information, time code or coded signals in EDH, VPID and SDTI.
Color models
Single Link HD -SDI SMPTE 292M offers
- YCbCr 4:2:2 with 10 bits per channel.
Dual Link HD -SDI SMPTE 372M provides additional
- Higher frame rates for 1080p formats: 50, 60 /1, 001 and 60
- YCbCr 4:4:4 and RGB 4:4:4 10 bit per channel, with optional alpha channel
- YCbCr 4:4:4 and RGB 4:4:4 with 12 bit per channel without alpha channel
- YCbCr 4:2:2 with 12 bit per channel, with optional alpha channel
3D development
The Digital Cinema Initiatives uses HD -SDI transmission to display 3D content in the cinema with 48P.
See also
Serial Digital Interface (SDI )