IP Test and Measurement for ST 2110 Systems

Presenters : Kevin Salvidge - Leader

Year : 2019

dlp_document_download : AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 1 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 C U R A T E D B Y IP Test and Measurement for ST 2110 Systems Kevin Salvidge – European Regional Development Manager Leader Europe LimiteT Your Logo Here (see note on Slide 3) I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Traditional SDI Video and Audio Test and Measurement 2 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 2 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 3 These displays are traditionally used by Engineers and Technical Production staff for testing SDI signals I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 4 These displays are traditionally used by Engineers and Technical Production staff for testing SDI signals But they are not actually testing the integrity of the SDI signal, they are testing the integrity of the colour signal forms AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 3 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 5 Status, Eye and Jitter and timing are used to measure the integrity of the SDI signal I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 6 Status, Eye and Jitter and timing are used to measure the integrity of the SDI signal But are they relevant when it comes to measuring ST 2110 sources? AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 4 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Comparing SDI and IP Compare SDI and IP infrastructure test and measurement requirements SDI IP Connectivity Physical Layer Coding Baseband Video 7 Layer OSI model Essence Single essence per BNC • 1X 1080p50 unidirectional Multiple essence per fibre • 100GbE > 75x 1080p50 bi -directional Measurement Direct Measurement Indirect Measurement Transport Synchronous Transport Asynchronous Transport Cause of Error - Occurrence Cable loss Connector contact failure Impedance mismatch Jitter Signal rise and fall time Packet loss due to network overload • Excess network traffic • Bandwidth restrictions due to compensation technologies like FEC, ARQ and hitless protection (1+1) Error frame discard Measurement Methods Monitoring Cyclic Redundancy Check (CRC) and Timing Reference Signal (TRS) errors Monitoring Frame Check Sequences (FCS) and Cyclic Redundancy Check (CRC) I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 IP Video and Audio Test and Measurement 8 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 5 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 IP Video and Audio Test and Measurement PacketStorm IP Analyser BridgeTech VB440 IP Test and Measurement Analyser Monitoring Generator Emulato r I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9  SMPTE ST 2110 (Professional Media Over Managed IP Networks)  ST 2110 -10 (System Timing and Definitions)  ST 2110 -20 (Uncompressed Active Video)  ST 2110 -21 (Traffic Shaping and Delivery Timing for Video)  ST 2110 -30 (PCM Digital Audio)  ST 2110 -31 (AES3 Audio ）  ST 2110 -40 (Ancillary Data) ST2110 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 6 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9  Factors that can impact broadcast operation  Packet loss due to network overload, error frame discard  Bandwidth restrictions due to compensation technologies like Forward Error Correction (FEC) and Automatic Repeat Query (ARQ) and hitless protection (1+1).  When the packet is excessively delayed, the buffer will underflow and it becomes impossible to reproduce the stream  PTP is not transmitted stably  Measuring method  Frame Check Sequence (FCS), Cyclic Redundancy Check (CRC) monitoring  Measure the packet arrival interval and check whether the packet is being transmitted stably  Monitoring the stability of PTP  Measures  Review of network system, QoS setting of switch etc. Antenna Grand Master IP Switch Transparent Clock Edge Master Boundary Clock . . . Slave BB W CLK TC Sync Generator GNSS Master 1 Master 2 IP Measurement I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Packet Arrival Interval Time 12 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 7 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 •Confirm the protocol, rate, address etc. of the received packet Monitoring traffic on each input IP port, as variations might indicate a network issue Monitor whether errors in packets occur IP Header UDP Header RTP Header Ethernet Header Data FCS Max 1,500 byte IP Measurement  As the IP network system becomes more complicated, it is important to monitor each service because of separation at the time of failure PTP Master Video Audio PTP Source 10.0.0.71 Destination 239.192.0.100 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 There is the possibility that an excessive packet delay occurs due to the network system and therefore the stream can not be reproduced due to the buffer shortage of the receiver. By measuring the packet arrival interval, this checks whether the packet is stably transmitted. Packet arrival interval Stable packet transmission Excessive packet transmission PTP Master Video Audio PTP Packet arrival interval time Packet Jitter Measurement AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 8 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 • P1 is the instantaneous latency from transmission to reception of datagrams on path number 1. • P2 is the instantaneous latency from transmission to reception of datagrams on path number 2. • P1 and P2 are inclusive of any network jitter. • PT is the latency from transmission to the final reconstructed output. It is also the latest time that a packet could arrive at the receiver to be part of the reconstructed output. • EA is the earliest time that a packet could arrive at the receiver to ensure seamless reconstruction. • MD is the maximum differential and is the difference of PT and EA. MD = (PT -EA) • PD is the instantaneous path differential and is always equal to the absolute value of ( P1 – P2 ). PD = (P1 -P2) ST 2022 -7 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Path 1 Path 2 Path Differential ST 2022 -7 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 9 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 ST 2022 -7 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Loss of one path ST 2022 -7 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 10 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Precision Time Protocol 19 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Sync (Event) Follow up (General) Delay Request (Event) Delay Response (General) t1 t2 t3 t4 T-ms (t2 – t1) T-sm (t4 – t3) Master Slave PTP synchronization  Time synchronization of PTP is done by Sync, Follow up, Delay Request, Delay Response.  Calculate the time difference offset assuming that the message is transmitted from the master to the slave and from the slave to the master at the same time.  An asymmetric packet delay time occurs due to packet retention time in the switch, path change of the network, etc., so that the average transmission time fluctuates.  Is time synchronization accuracy of less than 1 us maintained?  Phase of PTP and video, Phase of PTP and audio are stable Time Offset = ( (t 2-t1) – (t4-t3) ) /2 Time Offset Delay Time = ( (t 2-t1) + (t4-t3) ) /2 Delay Time PTP Measurement AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 11 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 •PTP(Gen) – General (port 320) •PTP( Evt ) – Event (port 321) Delay Response FOLLOW -UP PTP Measurement – Protocol - Messages I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Sync (Event) Follow up (General) Delay Request (Event) Delay Response (General) t1 t2 t3 t4 Master Slave Time Offset = ( (t 2-t1) – (t4-t3) ) /2 T-ms (t2 – t1) T-sm (t4 – t3) As SMPTE ST.2110 -20 contains a large volume of asynchronous data, if the network switch cannot handle this data rate, it can impact upon the propagation delay of the PTP announcements. The Time Offset and Time Delay graph display the stability of the PTP announcements. →In order to obtain stable PTP synchronization it is necessary to set PTP compatible network switch or QoS PTP Measurement PTP 　Master PTP 　Slave t1 t2 t3 t4 Path Delay Path Delay SYNC Delay Req AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 12 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Message type Message class Value (hex) Sync Event 0 Delay_Req Event 1 Pdelay_Req Event 2 Pdelay_Resp Event 3 Reserved — 4-7 Follow_Up General 8 Delay_Resp General 9 Pdelay_Resp_Follow_Up General A Announce General B Signaling General C Management General D Reserved — E-F Sync (Event) Follow up (General) Delay Request (Event) Delay Response (General) t1 t2 t4 Master Slave t3 Display count of PTP messages per second → Confirm what message rate is being sent from the master of PTP Port Number 319 Port Number 320 PTP Measurement I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9  PTP and RTP timing measurement •It can be confirmed whether video, audio and ANC signals are synchronized with PTP by comparing the time information of PTP and the time stamp ※AIMS white paper The transmitting side transmits the stream according to the time of the PTP, and the receiving side reproduces in accordance with the time of the PTP PTP and RTP Measurement AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 13 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Timing Comparisons 25 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 HANC VANC Active Pixels EAV SAV Mbit V Phase Delay of 21 lines is the delay between EAV and SAV H Phase Delay of 4.152us RTP / PTP Timing - ST 2110 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 14 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 RTP / PTP Timing - ST 2110 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 ST 2110 -20 – Timing Comparison AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 15 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 ST 2110 -20/30 – Timing Comparison I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Packet Header Information 30 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 16 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 For packets selected in blue Display header information in MAC / IP / UDP / RTP / PAYLOAD. Packet Header Information I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 For packets selected in blue Display header information in MAC / IP / UDP / RTP / PAYLOAD. Packet Header Information AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 17 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Packet Header Information For packets selected in blue Display header information in MAC / IP / UDP / RTP / PAYLOAD. I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Display information of SFP + transceiver module (IP 1/2) SFP Information AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 18 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Event Name Content FCS Frame Check Sequence (FCS) Error IP CS IP Checksum Error UDP CS UDP Checksum Error Los Stream 1 IP Stream 1 Packet Los Error Los Stream 2 IP Stream 2 Packet Los Error Los Stream 3 IP Stream 3 Packet Los Error Los Stream 4 IP Stream 4 Packet Los Error PTP Unlock PTP Unlock Error Regarding the display colors in the frame, gray is not counted, white is no event occurrence, red is an event occurrence, green is an event in the past, it means that it has not occurred at present. IP Event Log I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 IP Status PTP Status Packet Status IP Phase with PTP Combined IP Measurement AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 19 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Hybrid IP and SDI Video and Audio Test and Measurement 37 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9  With ST -2110, the timing information has been removed from the underlaying hardware layer making the distribution asynchronous.  With current broadcast formats, video must be frame synchronous at the camera’s sensor and at the viewers television screen.  The intermediate IP distribution network is asynchronous but the variance in packet jitter directly affects latency leading to potentially longer video and audio delays than we have come to expect from SDI infrastructures.  Although uncompressed video such as that provided by ST -2110 does map to the active video parts of SDI, two major changes have occurred;  The PTP and SPG may or may not be the same device  Signal distribution in IP is asynchronous and multiplexed.  The only way to make any meaningful comparisons between SDI and IP signals in a broadcast facility transitioning to IP is to use SDI and IP monitoring and analysis equipment that resides within the same unit . Why do we need Hybrid Operation ? AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 20 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Hybrid Operation I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Hybrid Operation AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 21 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Multi Channel - IP Operation I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Questions 42 •Recommended Reading •Broadcast Bridge - Essential Guide - Hybrid IP and SDI Test and Measurement AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 22 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Thank you Thank you to our Media Partners Kevin Salvidge, Leader Europe Limited Salvidge@leadereurope.com Tel : +44 7826 178 752 43