Audio in an All-IP Production Facility

Presenters : Andy Rayner - Nevion

Year : 2019

dlp_document_download : C U R A T E D B Y I P S H O W C A S E T H E AT E R AT N A B – A P R I L 8 -11 , 2 01 9 Audio in an all - IP production facility Andy Rayner, Chief Technologist, Nevion arayner@nevion.com +44 7711 196609 About me! 2 Audio – the most important bit! ‘Most of the complexity of a production environment is the audio’ The Audio folks did IP first! Standardized Audio interfaces Standardised IP formats Proprietary IP formats Lots of different audio interfaces and formats! Analogue AES3 SDI embedded IP 2022 -6 embedded IP - 3326 IP - AES67 AES10 MADI Livewire DANTE RAVENNA EBU 3326 AES67 ST2110 -30 AES50 AoE WheatNet Q -LAN SYSTEM -10 AUDIO -30 VIDEO -20 COMPRESSED VIDEO -22 AES3 -32 bit AUDIO -31 TIMING -21 2022 -8 COMPOSITE The expanding SMPTE ST2110 family ANCILLARY DATA -40 MULTI -PART VIDEO -23 FUTURE: FAST METADATA -41 FUTURE: FMX -42 Standardized data plane mature, control plane recently proven Audio data stream Audio data stream Controller IS -04, IS -05, IS -07, IS -08 • Keep it all -IP – don’t go back to baseband! • Gain and delay control still needed • Asynchronous (external) sources timing reconciliation (SRC) • Flexible ST2110 -30 channel density (1 – 64 channels) • Full (per mono channel) shuffling capability • Fully Orchestration (e.g. VideoIPath) configurable • NMOS compliant • All -IP processing Audio manipulation requirements Controller NMOS registry Controller NMOS registry VideoIPath NMOS registry 11 Video - associated audio format interfacing ST 2022 -6 16 Mono ST 2022 -6 16 Mono ST 2022 -6 16 Mono ST 2022 -6 16 Mono ST2110 -30 8 Mono ST2110 -30 8 Mono ST2110 -30 8 Mono ST2110 -30 8 Mono SDI 16 Mono SDI 16 Mono SDI 16 Mono SDI 16 Mono ST 2022 -6 16 Mono ST 2022 -6 16 Mono ST 2022 -6 16 Mono ST 2022 -6 16 Mono ST2110 -30 8 Mono ST2110 -30 8 Mono ST2110 -30 8 Mono ST2110 -30 8 Mono SDI 16 Mono SDI 16 Mono SDI 16 Mono SDI 16 Mono 12 Audio - only format interfacing 2110 -31 16 Mono 2110 -31 16 Mono 2110 -31 16 Mono 2110 -31 16 Mono 2100 -30 8 Mono 2110 -30 8 Mono 2110 -30 8 Mono 2110 -30 8 Mono Async in 16 Mono Async in 16 Mono Async in 16 Mono Async in 16 Mono AES3 16 stereo Analogue 16 Mono AES3 16 stereo Analogue 16 Mono AES67 64 Mono AES67 64 Mono AES67 64 Mono AES67 64 Mono MADI 64 Mono MADI 64 Mono MADI 64 Mono MADI 64 Mono 13 Audio facility interconnects Remote commentary location Event location Production Center Re - sync Re - sync 14 Moving outside campus based audio production islands • WAN connectivity involved • Longer latencies • (Potentially) Asynchronous sources • Layer 2 too limiting • Layer 3 (routed) needed for larger and multi -campus networks 14 PTP GM PTP GM From link - based IP systems to end - to - end IP systems Absolute time of origination is captured in AES67/ST2110 - 30 Media payload RTP UDP IP VLAN MAC/ PoS / GFP/MPLS …but quickly lost as it is treated as a transport timestamp Reconciling essence timings for use Processing time Processing time Processing time Origination time Use time link time link time link time link time link time Why are we in the current approach? • ST2110 doesn’t (yet) actually specify using timing for end2end  Digital media processing unit IP rx IP tx Device internal architecture tracking moments of time through a system Internal real -time timing distribution Media ingress timestamp Media egress timestamp Processing functions Analogy: PTP transparent clock handling in switches AES67 – defines link offset link time PTP holdover is capable of being very long – let’s make it so! Going off -campus – the IP facility media edge PTP TIMING DEVICE DISCOVERY & CTL MEDIA FLOW IP ADDRESSING ESSENCE FLOWS PROTECTION TERMINATION ALTERNATIVE TIMING DOMAINS RESTRICTED/PROXY DISCOVERY & CTL DIFFERENT IP ADDRESSING (NAT) ESSENCE OR COMPOSITE FLOWS PROTECTION TERMINATION Protection – on and off campus n n+1 n+2 n+4 n+5 n+6 n+8 n+9 n+10 n+3 n+7 n+11 n+12 n+13 n+14 n+16 n+17 n+18 n+20 n+21 n+22 n+15 n+19 n+23 n+24 n+25 n+26 n+27 n+28 n+29 n+30 n+31 n+32 n+33 n+34 n+35 n+36 n+37 n+38 n+39 n+40 n+41 n+42 n+43 (1,1) (L,1) (1,2) (1,D) (L,D) (2,1) (2,2) 1 L 2 flow A flow B SOURCE DESTINATION flow A flow B DESTINATION SOURCE delay Spatial Spatial + temporal FEC ST2110→WAN "To enable effective transport of ST2110 media flows and associated control data across Wide Area Networks in an interoperable manner ." 24 Plug for current VSF Activity Group Phase 1: NAB 2019 Phase 2: IBC 2019 ST2110 over WAN for inter - facility & OBs • Flow protection ✓ • Flow trunking ✓ • Essence alignment ✓ • Low latency handling • Format conversion • Compression ✓ • Protection of other data flows ✓ • Security • PTP trunking • Wan timing • Associated control (NMOS) filtering and border proxying Next topic Trunking 2110 essences 26 2110 -20 2110 -30 2110 -40 2110 -30 TRUNK OTHER STUFF Conclusions • Audio is incredibly important • Audio is often the most complex part of the system • Full standards compliance is essential • The standardised control layer is less mature – but all the parts are now there • Standards now provide capability for L3 wide -area data & control planes • Keeping the audio signal flow All -IP is crucial to gain full benefit 27 C U R A T E D B Y I P S H O W C A S E T H E AT E R AT N A B – A P R I L 8 -11 , 2 01 9 Thank You Do come and see us SU5510 We do a nice cup of tea! Andy Rayner, Chief Technologist arayner@nevion.com +44 7711 196609