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Content for  TR 26.805  Word version:  17.0.1

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1  Scopep. 7

The present document identifies standardization needs and potential standards gaps when using 5G Systems for media production. More specifically the following aspects are addressed in this document:
  • To identify the relevant media production use cases (professional, semi-professional, production, contribution), based on existing use-cases from TR 22.827 as well as requirements from TS 22.263, that may benefit from 5G System functionalities. This includes collaboration use cases between media producers and 5G System operators.
  • To develop one or several reference media production architectures and to map the variety of different media and control flows (such as uplink video, return video, tally, etc) involved in media production onto 5G System delivery components.
  • To identify relevant QoS requirements for media production workflows, including required bit rates, loss rates, formats, latencies and jitter, and to identify their impact on the relevant KPIs for media production workflows (reliability, mean-time-between failure, service-level agreements, etc.).
  • To identify relevant 5G System features like NPNs, Network Slicing, QoS classes, network event reporting and assistance, etc. that are useful for media production, and to clarify their usage for media production.
  • To identify the suitability of existing media production content delivery protocols, codecs and service layers for 5G System usage, evaluate benefits and gaps, and recommend profiles or extensions in collaboration with organizations that develop and deploy existing protocols and codecs.
  • To study media device and network orchestration solutions (such as AMWA NMOS), and their integration/interactions with the 5G exposure framework.
  • To collaborate with relevant other 3GPP groups and external organizations (VSF, 5G-MAG, EBU, etc.) on media-related aspects of Media Production use cases.
  • To identify potential normative work on media level for media production use cases in 5G Systems.
The document primarily focuses on the usage of 5G Systems including NPNs (both Standalone NPN and Public Network Integrated NPN).
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2  Referencesp. 7

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.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 22.261: "Service requirements for the 5G system".
[3]
TS 22.263: "Service requirements for Video, Imaging and Audio for Professional Applications (VIAPA)".
[4]
TR 22.827: "Study on Audio-Visual Service Production".
[5]
M.P. Sharabayko, M.A. Sharabayko, J. Dube, JS. Kim, JW. Kim: "The SRT Protocol", draft-sharabayko-mops-srt-01
[6]
Video Sercices Forum (VSF): "Reliable Internet Stream Transport (RIST) Activity Group",
[7]
VSF TR 06-1:2020 "Reliable Internet Stream Transport (RIST) Protocol Specification - Simple Profile", https://vsf.tv/download/technical_recommendations/VSF_TR-06-1_2020_06_25.pdf
[8]
VSF TR 06-2, "Reliable Internet Stream Transport (RIST) Protocol Specification - Main Profile", https://www.vsf.tv/download/technical_recommendations/VSF_TR-06-2_2020_03_24.pdf
[9]
[10]
[11]
David Aleksandersen: "What is NDI® (Network Device Interface)?", https://newsandviews.dataton.com/what-is-ndi-network-device-interface
[12]
Kieran Kunhya and Ciro Noronha: "RIST and SRT: What's the difference?", https://www.tvbeurope.com/ip-migration/rist-and-srt-whats-the-difference
[13]
Tofik Sonono: "Interoperable Retransmission Protocols with Low Latency and Constrained Delay: A Performance Evaluation of RIST and SRT", Masters Thesis, KTH Stockholm, 2019.
[14]
EBU: "Minimum User Requirements to Build and Manage an IP-Based Media Facility", 15 July 2020, https://tech.ebu.ch/files/live/sites/tech/files/shared/tech/tech3371.pdf.
[15]
AMWA: "NMOS Overview", https://www.amwa.tv/nmos-overview.
[16]
EBU: "The Technology Pyramid For Media Nodes", .
[17]
EBU: "Technology Pyramid Media Node Maturity Checklist", September 2021, https://tech.ebu.ch/publications/technology-pyramid-media-node-maturity-checklist?rec=1.
[18]
[19]
AMWA: "Networked Media Systems - the Big Picture", https://static.amwa.tv/networked-media-systems-big-picture-2021-03-05.pdf.
[20]
AMWA: "NMOS specification repository", https://specs.amwa.tv/nmos.
[21]
SMPTE ST 2110: "Professional Media over Managed IP".
[22]
IEEE 1588-2008: "Precision Time Protocol".
[23]
SMPTE ST 2022-1:2007: "Forward Error Correction for Real-Time Video/Audio Transport Over IP Networks".
[24]
SMPTE ST 2022-6:2012: "Transport of High Bit Rate Media Signals over IP Networks (HBRMT)",
[25]
SMPTE ST 2022-7:2019: "Seamless Protection Switching of RTP Datagrams".
[26]
SMPTE ST 2059-2:2015: "SMPTE Profile for Use of IEEE-1588 Precision Time Protocol in Professional Broadcast Applications".
[27]
SMPTE ST 2110-10:2017: "Professional Media Over Managed IP Networks: System Timing and Definitions".
[28]
SMPTE ST 2110-20:2017: "Professional Media Over Managed IP Networks: Uncompressed Active Video".
[29]
SMPTE ST 2110-22:2019: "Professional Media Over Managed IP Networks: Constant Bit-Rate Compressed Video".
[30]
SMPTE ST 2110-30:2017: "Professional Media Over Managed IP Networks: PCM Digital Audio".
[31]
SMPTE ST 2110-31:2018: "Professional Media Over Managed IP Networks: AES3 Transparent Transport".
[32]
RFC 4585:  "Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF)".
[33]
RFC 8086:  "GRE-in-UDP Encapsulation".
[34]
Ember+ control protocol.
[35]
SMPTE ST 259:2008: "For Television - SDTV Digital Signal/Data - Serial Digital Interface".
[36]
SMPTE ST 292-1:2012: "1.5 Gb/s Signal/Data Serial Interface".
[37]
TR 26.925: "Typical traffic characteristics of media services on 3GPP networks".
[38]
Wikipedia: "MADI", last modified 19th April 2021, https://en.wikipedia.org/wiki/MADI
[39]
Wikipedia: "Time-Sensitive Networking", last modified 23rd June 2021, https://en.wikipedia.org/wiki/Time-Sensitive_Networking
[40]
[41]
RFC 5104:  "Codec Control Messages in the RTP Audio-Visual Profile with Feedback (AVPF)".
[42]
RFC 4585:  "Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF)".
[43]
ISO/IEC 13818 1: "Information technology - Generic coding of moving pictures and associated audio information - Part 1: Systems".
[44]
RFC 3550|STD  64: "RTP: A Transport Protocol for Real-Time Applications".
[45]
RFC 8086:  "GRE-in-UDP Encapsulation".
[46]
RFC 2250:  "RTP Payload Format for MPEG1/MPEG2 Video".
[47]
RFC 7798:  "RTP Payload Format for High Efficiency Video Coding (HEVC)".
[48]
OASIS: "MQTT Version 5.0", 7th March 2019, https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html
[49]
RFC 6416:  "RTP Payload Format for MPEG-4 Audio/Visual Streams".
[50]
RFC 9134:  "RTP Payload Format for ISO/IEC 21122 (JPEG XS)".
[51]
SMPTE ST 2110-40:2018 "Professional Media Over Managed IP Networks: SMPTE ST 291-1 Ancillary Data".
[52]
SMPTE ST 291-1:2011: "Ancillary Data Packet and Space Formatting".
[53]
ITU-R BS.2076-2: "Audio Definition Model".
[54]
SCTE-104 2019a: "Automation System to Compression System Communications Applications Program Interface (API)".
[55]
SMPTE ST 2020-1:2014: "Format of Audio Metadata and Description of the Asynchronous Serial Bitstream Transport".
[56]
ITU-R BS.2125-0: "A serial representation of the Audio Definition Model".
[57]
AES67-2018: "AES standard for audio applications of networks - High-performance streaming audio-over-IP interoperability".
[58]
[59]
[60]
GSMA Intelligence: "The economics of mmWave 5G", January 2021, https://data.gsmaintelligence.com/research/research/research-2021/the-economics-of-mmwave-5g
[61]
TR 38.900: "Study on channel model for frequency spectrum above 6 GHz".
[62]
[63]
RFC 9000:  "QUIC: A UDP-Based Multiplexed and Secure Transport", May 2021.
[64]
draft-ietf-quic-datagram-08:  "An Unreliable Datagram Extension to QUIC", 14th January 2022, https://www.ietf.org/archive/id/draft-ietf-quic-datagram-08.html.
[65]
draft-gruessing-moq-requirements-00:  "QUIC Encapsulation for Media over RTP - Requirements and Use Cases", October 2021, https://www.ietf.org/id/draft-gruessing-moq-requirements-00.html.
[66]
draft-hurst-quic-rtp-tunnelling-01:  "QRT: QUIC RTP Tunnelling", 28th January 2021, https://datatracker.ietf.org/doc/html/draft-hurst-quic-rtp-tunnelling-01.
[67]
draft-engelbart-rtp-over-quic-01:  "RTP over QUIC", 25th October 2021, https://www.ietf.org/archive/id/draft-engelbart-rtp-over-quic-01.html.
[68]
draft-ietf-quic-http-34:  "Hypertext Transfer Protocol Version 3 (HTTP/3)", February 2021, https://www.ietf.org/archive/id/draft-ietf-quic-http-34.html.
[69]
RFC 2543:  "SIP: Session Initiation Protocol", March 1999.
[70]
draft-dawkins-avtcore-sdp-rtp-quic-00:  "SDP Offer/Answer for RTP using QUIC as Transport", 28th January 2022, https://www.ietf.org/archive/id/draft-dawkins-avtcore-sdp-rtp-quic-00.html.
[71]
RFC 4588:  "RTP Retransmission Payload Format", July 2006.
[72]
RFC 8888:  "RTP Control Protocol (RTCP) Feedback for Congestion Control", January 2021.
[73]
RFC 8698:  "Network-Assisted Dynamic Adaptation (NADA): A Unified Congestion Control Scheme for Real-Time Media", February 2020.
[74]
RFC 8298:  "Self-Clocked Rate Adaptation for Multimedia", December 2017.
[75]
draft-ietf-rmcat-gcc-02:  "A Google Congestion Control Algorithm for Real-Time Communication", 8th July 2016, https://datatracker.ietf.org/doc/html/draft-ietf-rmcat-gcc-02.
[76]
RFC 8382:  "Shared Bottleneck Detection for Coupled Congestion Control for RTP Media", June 2018.
[77]
draft-ietf-quic-multipath-00:  "Multipath Extension for QUIC", February 2022, https://www.ietf.org/archive/id/draft-ietf-quic-multipath-00.html.
[78]
ITU-R BT.2069-7, "Tuning ranges and operational characteristics of terrestrial electronic news gathering (ENG), television outside broadcast (TVOB) and electronic field production (EFP) systems", October 2017, https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BT.2069-7-2017-PDF-E.pdf.
[79]
BBC White Paper WHP 277, "BBC halfRF MIMO Radio-camera Programme Trial", February 2014, http://downloads.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP277.pdf.
[80]
AES-R16-2021: "AES Standards Report - PTP parameters for AES67 and SMPTE ST 2059-2 interoperability", October 2021, https://www.aes.org/publications/standards/search.cfm?docID=105
[81]
ETSI TS 103 589: "Higher Order Ambisonics (HOA) Transport Format".
[82]
[83]
ITU-R BS.1548-7: "User requirements for audio coding systems for digital broadcasting".
[84]
TS 23.501: "System architecture for the 5G System (5GS)".
[85]
RFC 7950:  "The YANG 1.1 Data Modeling Language".
[86]
RFC 6241:  "Network Configuration Protocol (NETCONF)".
[87]
IEEE Std 802.1Q-2018: "IEEE Standard for Local and metropolitan area networks--Bridges and Bridged Networks".
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3  Definitions of terms, symbols and abbreviationsp. 11

3.1  Termsp. 11

For the purposes of the present document, the terms 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.
Non-Public Network:
See definition in TS 22.261.
Tier 1, 2, 3:
Different categories of media production with differences in importance and usage characteristics.
Production link:
A connection, usually bidirectional with strict QoS and latency requirements, between one or more devices used in a production environment to carry audio, video or other data.
Contribution link:
A connection between a production location and a broadcast centre that is usually a single path for tier 3 production but may be a dual path for Tier 1 events.
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3.2  Symbolsp. 11

Void

3.3  Abbreviationsp. 11

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.
AES
Audio Engineering Society
AIMS
Alliance for IP Media Solutions
AMWA
Advanced Media Workflow Association
ARQ
Automatic Repeat Query
CCU
Camera Control Unit
DNS
Domain Name System
FEC
Forward Erasure Correction, Forward Error Correction
HDCP
High-bandwidth Digital Content Protection
HDR
High Dynamic Range
HFR
Higher Frame Rates
HOA
Higher Order Ambisonics
HTF
HOA Transport Format
IPMX
IP Media eXperience
mDNS
Multicast DNS
MADI
Multichannel Audio Digital Interface
MQTT
Message Queuing Telemetry Transport
NDI
Network Digital Interface
NMOS
Networked Media Open Specifications
NPN
Non-Public Network
PA
Public Address
PLMN
Public Land Mobile Network
PTP
Precision Time Protocol
PTZ
Pan, Tilt, Zoom
QRT
QUIC RTP Tunnelling
RIST
Reliable Internet Stream Transport
SDI
Serial Digital Interface
SMPTE
Society of Motion Picture and Television Engineers
SRT
Secure Reliable Transport
VSF
Video Service Forum
WAN
Wide Area Network
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