Type name:
video
Subtype name:
jxsv
Required parameters:
rate: The RTP timestamp clock rate. Applications using this
payload format SHALL use a value of 90000.
packetmode: This parameter specifies the configured packetization
mode as defined by the pacKetization mode (K) bit in the
payload header of Section 4.3 of RFC 9134. This value SHALL be
equal to the K-bit value configured in the RTP stream (i.e., 0
for codestream or 1 for slice).
Optional parameters:
transmode: This parameter specifies the configured transmission
mode as defined by the Transmission mode (T) bit in the payload
header of Section 4.3 of RFC 9134. If specified, this value
SHALL be equal to the T-bit value configured in the RTP stream
(i.e., 0 for out-of-order-allowed or 1 for sequential-only).
If not specified, a value 1 (sequential-only) SHALL be assumed
and the T bit SHALL be set to 1.
profile: The JPEG XS profile [ISO21122-2] in use. Any white
space Unicode character in the profile name SHALL be omitted.
Examples of valid profile names are 'Main444.12' or
'High444.12'.
level: The JPEG XS level [ISO21122-2] in use. Any white space
Unicode character in the level name SHALL be omitted. Examples
of valid levels are '2k-1' or '4k-2'.
sublevel: The JPEG XS sublevel [ISO21122-2] in use. Any white
space Unicode character in the sublevel name SHALL be omitted.
Examples of valid sublevels are 'Sublev3bpp' or 'Sublev6bpp'.
depth: Determines the number of bits per sample. This is an
integer with typical values including 8, 10, 12, and 16.
width: Determines the number of pixels per line. This is an
integer between 1 and 32767, inclusive.
height: Determines the number of lines per video frame. This is
an integer between 1 and 32767, inclusive.
exactframerate: Signals the video frame rate in frames per
second. Integer frame rates SHALL be signaled as a single
decimal number (e.g., "25") whilst non-integer frame rates
SHALL be signaled as a ratio of two integer decimal numbers
separated by a "forward-slash" character (e.g., "30000/1001"),
utilizing the numerically smallest numerator value possible.
interlace: If this parameter name is present, it indicates that
the video is interlaced, or that the video is Progressive
segmented Frame (PsF). If this parameter name is not present,
the progressive video format SHALL be assumed.
segmented: If this parameter name is present, and the interlace
parameter name is also present, then the video is a Progressive
segmented Frame (PsF). Signaling of this parameter without the
interlace parameter is forbidden.
sampling: Signals the color difference signal sub-sampling
structure.
Signals utilizing the non-constant luminance Y'C'B C'R signal
format of [BT.601-7], [BT.709-6], [BT.2020-2], or [BT.2100-2]
SHALL use the appropriate one of the following values for the
Media Type Parameter "sampling":
YCbCr-4:4:4 (4:4:4 sampling)
YCbCr-4:2:2 (4:2:2 sampling)
YCbCr-4:2:0 (4:2:0 sampling)
Signals utilizing the Constant Luminance Y'C C'BC C'RC signal
format of [BT.2020-2] SHALL use the appropriate one of the
following values for the Media Type Parameter "sampling":
CLYCbCr-4:4:4 (4:4:4 sampling)
CLYCbCr-4:2:2 (4:2:2 sampling)
CLYCbCr-4:2:0 (4:2:0 sampling)
Signals utilizing the constant intensity I CT CP signal format
of [BT.2100-2] SHALL use the appropriate one of the following
values for the Media Type Parameter "sampling":
ICtCp-4:4:4 (4:4:4 sampling)
ICtCp-4:2:2 (4:2:2 sampling)
ICtCp-4:2:0 (4:2:0 sampling)
Signals utilizing the 4:4:4 R' G' B' or RGB signal format (such
as that of [BT.601-7], [BT.709-6], [BT.2020-2], [BT.2100-2],
[SMPTE2065-1], or [SMPTE2065-3]) SHALL use the following value
for the Media Type Parameter "sampling":
RGB (RGB or R' G' B' samples)
Signals utilizing the 4:4:4 X' Y' Z' signal format (such as
defined in [SMPTE428-1]) SHALL use the following value for the
Media Type Parameter "sampling":
XYZ (X' Y' Z' samples)
Key signals as defined in [SMPTE157] SHALL use the value key
for the Media Type Parameter "sampling". The key signal is
represented as a single component:
KEY (Samples of the key signal)
Signals utilizing a color sub-sampling other than what is
defined here SHALL use the following value for the Media Type
Parameter "sampling":
UNSPECIFIED (Sampling signaled by the payload)
colorimetry: Specifies the system colorimetry used by the image
samples. Valid values and their specification are the
following:
BT601-5: [BT.601-5].
BT709-2: [BT.709-2].
SMPTE240M: [SMPTE240M].
BT601: [BT.601-7].
BT709: [BT.709-6].
BT2020: [BT.2020-2].
BT2100: [BT.2100-2], Table 2 titled "System
colorimetry".
ST2065-1: Academy Color Encoding Specification (ACES)
[SMPTE2065-1].
ST2065-3: Academy Density Exchange Encoding (ADX)
[SMPTE2065-3].
XYZ: [ISO11664-1], section titled "1931 Observer".
UNSPECIFIED: Colorimetry is signaled in the payload by the
color specification box of [ISO21122-3], or it
must be manually coordinated between sender and
receiver.
Signals utilizing the [BT.2100-2] colorimetry SHOULD also
signal the representational range using the optional parameter
RANGE defined below. Signals utilizing the UNSPECIFIED
colorimetry might require manual coordination between the
sender and the receiver.
TCS: Transfer Characteristic System. This parameter specifies
the transfer characteristic system of the image samples. Valid
values and their specification are the following:
SDR: Standard Dynamic Range video streams that
utilize the Optical Electrical Transfer Function
(OETF) of [BT.709-6] or [BT.2020-2]. Such
streams SHALL be assumed to target the Electro-
Optical Transfer Function (EOTF) specified in
[BT.1886-0].
PQ: High dynamic range video streams that utilize
the Perceptual Quantization system of
[BT.2100-2].
HLG: High dynamic range video streams that utilize
the Hybrid Log-Gamma system of [BT.2100-2].
UNSPECIFIED: Video streams whose transfer characteristics are
signaled by the payload as specified in
[ISO21122-3], or that must be manually
coordinated between sender and receiver.
RANGE: This parameter SHOULD be used to signal the encoding range
of the sample values within the stream. When paired with
[BT.2100-2] colorimetry, this parameter has two allowed values,
NARROW and FULL, corresponding to the ranges specified in TABLE
9 of [BT.2100-2]. In any other context, this parameter has
three allowed values: NARROW, FULLPROTECT, and FULL, which
correspond to the ranges specified in [SMPTE2077]. In the
absence of this parameter, and for all but the UNSPECIFIED
colorimetry, NARROW SHALL be the assumed value. When paired
with the UNSPECIFIED colorimetry, FULL SHALL be the default
assumed value.
Encoding considerations:
This media type is framed in RTP and contains binary data; see
Section 4.8 of [RFC6838].
Security considerations:
See the Security Considerations section of RFC 9134.
Interoperability considerations:
None
Published specification:
See the References section of RFC 9134.
Applications that use this media type:
Any application that transmits video over RTP (like SMPTE ST
2110).
Fragment identifier considerations:
N/A
Additional information:
None
Person & email address to contact for further information:
T. Bruylants <rtp&intopix.com> and T. Richter <jpeg-xs-
techsupport&iis.fraunhofer.de>.
Intended usage:
COMMON
Restrictions on usage:
This media type depends on RTP framing; hence, it is only defined
for transfer via RTP [RFC3550].
Author:
See the Authors' Addresses section of RFC 9134.
Change controller:
IETF Audio/Video Transport Working Group delegated from the IESG.
Normative References:
[ISO21122-2]
ISO/IEC, "Information technology - JPEG XS low-latency
lightweight image coding system - Part 2: Profiles and
buffer models", ISO/IEC IS 21122-2.
[ISO21122-3]
ISO/IEC, "Information technology - JPEG XS low-latency
lightweight image coding system - Part 3: Transport and
container formats", ISO/IEC IS 21122-3.
Informative References:
[BT.1886-0]
ITU-R, "Reference electro-optical transfer function for
flat panel displays used in HDTV studio production", ITU-R
Recommendation BT.1886-0, March 2011,
<https://www.itu.int/rec/R-REC-BT.1886-0-201103-I/en>.
[BT.2020-2]
ITU-R, "Parameter values for ultra-high definition
television systems for production and international
programme exchange", ITU-R Recommendation BT.2020-2,
October 2015,
<https://www.itu.int/rec/R-REC-BT.2020-2-201510-I/en>.
[BT.2100-2]
ITU-R, "Image parameter values for high dynamic range
television for use in production and international
programme exchange", ITU-R Recommendation BT.2100-2, July
2018,
<https://www.itu.int/rec/R-REC-BT.2100-2-201807-I/en>.
[BT.601-5] ITU-R, "Studio encoding parameters of digital television
for standard 4:3 and wide screen 16:9 aspect ratios",
ITU-R Recommendation BT.601-5, October 1995,
<https://www.itu.int/rec/R-REC-BT.601-5-199510-S/en>.
[BT.601-7] ITU-R, "Studio encoding parameters of digital television
for standard 4:3 and wide screen 16:9 aspect ratios",
ITU-R Recommendation BT.601-7, March 2011,
<https://www.itu.int/rec/R-REC-BT.601-7-201103-I/en>.
[BT.709-2] ITU-R, "Parameter values for the HDTV standards for
production and international programme exchange", ITU-R
Recommendation BT.709-2, October 1995,
<https://www.itu.int/rec/R-REC-BT.709-2-199510-S/en>.
[BT.709-6] ITU-R, "Parameter values for the HDTV standards for
production and international programme exchange", ITU-R
Recommendation BT.709-6, June 2015,
<https://www.itu.int/rec/R-REC-BT.709-6-201506-I/en>.
[ISO11664-1]
ISO/CIE, "Colorimetry - Part 1: CIE standard colorimetric
observers", ISO/CIE IS 11664-1:2019, June 2019,
<https://www.iso.org/standard/74164.html>.
[SMPTE157] SMPTE, "SMPTE Recommended Practice - Key and Alpha
Signals", SMPTE RP 157:2012,
DOI 10.1109/ICPST.1998.729044, November 2012,
<https://ieeexplore.ieee.org/document/7290447>.
[SMPTE2065-1]
SMPTE, "SMPTE Standard - Academy Color Encoding
Specification (ACES)", SMPTE ST 2065-1:2021,
DOI 10.5594/SMPTE.ST2065-1.2021, January 2021,
<https://ieeexplore.ieee.org/document/9343931>.
[SMPTE2065-3]
SMPTE, "SMPTE Standard - Academy Density Exchange Encoding
(ADX) - Encoding Academy Printing Density (APD) Values",
SMPTE ST 2065-3:2020, DOI 10.5594/SMPTE.ST2065-3.2020,
November 2020,
<https://ieeexplore.ieee.org/document/9286953>.
[SMPTE2077]
SMPTE, "SMPTE Recommended Practice - Full-Range Image
Mapping", SMPTE RP 2077:2013,
DOI 10.5594/SMPTE.RP2077.2013, November 2013,
[SMPTE428-1]
SMPTE, "SMPTE Standard - D-Cinema Distribution Master -
Image Characteristics", SMPTE ST 428-1:2019,
DOI 10.5594/SMPTE.ST428-1.2019, March 2019,
<https://ieeexplore.ieee.org/document/8709077>.