Rec. ITU-R BT.1120-9 1
RECOMMENDATION ITU-R BT.1120-9
*
Digital interfaces for studio signals with 1 920 × 1 080 image formats
(Question ITU-R 130/6)
(1994-02/1998-11/1998-2000-2003-2004-2005-2007-2012-2017)
Scope
This Recommendation defines serial digital interfaces operating at two nominal clock frequencies, 1.485 GHz
and 2.97 GHz, for studio signals with 1 920 × 1 080 pixel arrays, at various frame frequencies up to 60 Hz,
4:4:4 and 4:2:2 sample structures defined in Recommendations ITU-R BT.709 and ITU-R BT.2100. The
interface may also be used for carrying packetized data.
Keywords
Serial Interface, HD-SDI, Real-Time, SDR-TV, HDR-TV, HLG, PQ
The ITU Radiocommunication Assembly,
considering
a) that Recommendation ITU-R BT.709 provides the image format parameters and values for
HDTV production and international programme exchange and contains the following HDTV studio
standard to cover a wide range of applications:
– 1 125 total lines and 1 080 active lines;
– picture rates of 60
, 50, 30
1
, 25 and 24
1
Hz, including progressive, interlaced and segmented
frame transport;
b) that Recommendation ITU-R BT.2100 defines image parameter values for high dynamic
range television for use in production and international programme exchange and contains the
following image formats having the same pixel counts and frame frequencies as those defined in
Recommendation ITU-R BT.709:
– wide colour gamut as defined in Recommendation ITU-R BT.2020;
– transfer functions of the perceptual quantization (PQ) and the Hybrid Log-Gamma (HLG);
– luminance and colour difference signal representations of the non-constant luminance (NCL)
Y'C'
B
C'
R
and the constant intensity (CI) IC
T
C
P
;
c) that a wide range of equipment based on the above systems has been developed and is
commercially available;
d) that many programmes are being produced in the above systems;
e) that serial digital interconnection has been developed to provide reliable transparent digital
interconnections,
*
Radiocommunication Study Group 6 made editorial amendments to this Recommendation in the
year 2018 in accordance with Resolution ITU-R 1.
Frame rates of 60/1.001, 30/1.001 and 24/1.001 Hz are also included.
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