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Content for  TS 26.116  Word version:  16.4.0

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0  IntroductionWord‑p. 6

Linear TV services can be made available on 3GPP services, e.g., based on MBMS, PSS user services and 5GMS.
For traditional linear TV distribution, TV services accessed through Satellite, Digital Terrestrial TV (DTT), cable or IPTV obey to requirements on the video profiles to ensure a consistent quality of experience while accessing different channels within a TV bouquet.
On-demand video services, via streaming or downloading, generally obey to the same requirements.
The purpose of the present document is to specify TV distribution formats with detailed definitions of consistent video distribution formats (such as spatial and temporal resolutions, aspect ratios, random access points, etc.) for which operators can provide consistent quality of experience for TV services.
The document is not restricted to operator services, but may also be referred to and used by third-party services that expect to have consistent quality of experience for TV services on 3GPP-defined radio bearers.

1  ScopeWord‑p. 7

The present document specifies requirements and guidelines on video source formats (frame rate, resolution, aspect ratio, colorimetry, bit depth…) and encoding parameters (codec format, random access point period, SEI messages…) for different types of TV services, including linear TV, catch-up TV or on-demand services. A limited set of Operation Points (e.g. SDTV, HDTV, UHD, …) are defined to provide confidence to content providers/broadcasters on the quality of experience offered by 3GPP services when used for TV-like distribution. Operation Points define format and encoding restrictions, but may also be viewed as compatibility points for UEs.
In particular, the Operation Points defined in the present document may serve as the primary tested configurations for TV centric video distribution. The Operation Points are defined based on the analysis and findings in the technical report TR 26.949.
In addition, in the context of DASH operations, not only the main distribution formats are defined, but also a subset of spatial and temporal resolutions. In order to minimize testing for seamless switching experience, suitable lower resolutions of distribution formats are defined. Furthermore, to compensate congestion situations, a minimum service quality is defined in order to provide service continuity.

2  References

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
TR 21.905: "Vocabulary for 3GPP Specifications".
TR 26.949: "Video formats for 3GPP services".
Recommendation ITU-R BT.709-6 (06/2015): "Parameter values for the HDTV standards for production and international programme exchange".
Recommendation ITU-R BT.2020-2 (10/2015): "Parameter values for ultra-high definition television systems for production and international programme exchange".
Recommendation ITU-T H.264 (04/2017): "Advanced video coding for generic audiovisual services" | ISO/IEC 14496-10:2014: "Information technology - Coding of audio-visual objects - Part 10: Advanced Video Coding".
Recommendation ITU-T H.265 (12/2016): "High efficiency video coding" | ISO/IEC 23008-2:2015: "High Efficiency Coding and Media Delivery in Heterogeneous Environments - Part 2: High Efficiency Video Coding".
TS 26.244: "Transparent end-to-end packet switched streaming service (PSS); 3GPP file format (3GP)".
TS 26.247: "Transparent end-to-end Packet-switched Streaming Service (PSS); Progressive Download and Dynamic Adaptive Streaming over HTTP (3GP-DASH)".
ISO/IEC 14496-15:2019: "Information technology - Coding of audio-visual objects - Part 15: Carriage of network abstraction layer (NAL) unit structured video in ISO base media file format".
ISO/IEC 23001-8:2016, "Information technology -- MPEG systems technologies -- Part 8: Coding-independent code points".
Recommendation ITU R BT.2100-2 (07/2018): "Image parameter values for high dynamic range television for use in production and international programme exchange".
[12]  TS 26.511: "5G Media Streaming (5GMS); Profiles, codecs and formats".

3  Definitions and abbreviationsWord‑p. 8

3.1  Definitions

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
A media bitstream that conforms to a video encoding format and certain Operation Point.
Operation Point:
A collection of discrete combinations of different content formats including spatial and temporal resolutions, colour mapping, transfer functions, etc. and the encoding format.
The pillarbox effect occurs in widescreen video displays when black bars (mattes or masking) are placed on the sides of the image. It becomes necessary when film or video that was not originally designed for widescreen is shown on a widescreen display, or a narrower widescreen image is displayed within a wider aspect ratio.
A receiver that can decode and render any bitstream that is conforming to a certain Operation Point.

3.2  Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
5G Media Streaming
Advanced Video Coding
Coded Video Sequence
Dynamic Adaptive Streaming over HTTP
Electro-Optical Transfer Function
For Further Study
High Definition
High Dynamic Range
Hybrid Log Gamma
Hypothetical Reference Decoder
High Efficiency Video Coding
Multicast Broadcast Multimedia Service
Media Presentation Description
Opto-Electronic Transfer Function
Network Abstraction Layer
Picture Parameter Set
Perceptual Quantization
Packet Switch Streaming
Random Access Point
Standard Dynamic Range
Supplemental Enhancement Information
Sequence Parameter Set
Ultra High Definition
Video Coding Layer
Video Usability Information

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