ITTC Technology Seminarcsmpte.com/download/CHAL1396264998772200/20150622/...Network Speed Delay...
Transcript of ITTC Technology Seminarcsmpte.com/download/CHAL1396264998772200/20150622/...Network Speed Delay...
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ITTC Technology Seminar
June 2015
Chuck Meyer
CTO – Production
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Migrating Live Production to IP Technology
It’s About Time
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The Last Workflow to Join
Graphics - File
NLE, NLW - File
DVB, VOD - Packets
Ingest - Packets
IPTV - Packets
OTT - Packets
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Where we have been
Color television workflows embodied a brittle,
camera-to-the-home stovepipe
Production was Directly attached to the home TV
Every business model ROI was based on 1 to many
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Color Television Time Domain
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SC/H Phase
Leader, Teleproduction Test Volume 1 Number 10
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Broadcast Spectrum
Strict Spectral Control
Tight Frequency Tolerance
Managed Signal Amplitude
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Production Switcher
Circa 1970
nsec SC/H Phase resolution
Memory does not exist
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Production Video Multiplier
Pixel Alignment Required: 64 MB RAM is 100 USD
Circa 1995
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Where we are Now
Digital television ( HD ) broke the strict connection
between the camera and the home
The requirement for nano-seconds is gone
Video production became line based
Many new ROI models are proposed, leveraging IP
technology
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Workflow Timing Model
SDI Still Used
Latency Stratum Network
Latency Human Factor
Absolute Real-
Time ~10 us Imperceptible
Pseudo Real-
Time < 1 ms
Edge of
Perceptible
Fast Non-Real-
Time 100ms Noticeable
Non-Real-Time 1s PVR
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Workflow Timing Model
Latency Stratum Network
Latency Workflow
Absolute Real-
Time ~10 us Computation
Pseudo Real-
Time < 1 ms Live Production
Fast Non-Real-
Time 100ms
Near On-
Line/Streaming
Non-Real-Time 10s File Based
SDI Still Used
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Time Relationships
Sampling time
Processing Samples and Pixels
Homogeneous
Media Time
Relative relationship between media
Audio Image, 3D
Lip Sync
Time of Day
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Live Production Technology Inflection Point
Wire Speed Routing
$ per signal per physical network
segment
Transparent, low latency CODEC
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Wire Speed Latency
Originally Presented by Meyer at Vid-Trans, March 2014
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Latency Validation Data
Courtesy
Brian Keane Aperi Corporation
Thomas Edwards Fox Networks E&O
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Jitter Validation Data
Courtesy
Brian Keane Aperi Corporation
Thomas Edwards Fox Networks E&O
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Update on Ethernet
25 GbE is here.
IEEE 802.3by
25/50/100 Standardized during 2016
QSFP28 as a package for 100 Gbps with 4
fibers
Broad Industry Support – Arista, Broadcom, CISCO, Mellanox
Image and data courtesy Arista
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Wire Speed Latency Update
Network Speed Delay Lines
2K/60 4K/60 4k/120 8K/120
Line Time usec 14.8 7.4 3.7 1.9
1 GbE 37 2.5 5 10 20
10 GbE 3.7 0.25 0.5 1 2
25 GbE 1.5 0.1 0.2 0.4 0.8
40 GbE 0.9 0.06 0.12 0.24 0.5
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Wire Speed Latency Update
Network Speed Delay Lines
2K/60 4K/60 4k/120 8K/120
Line Time usec 14.8 7.4 3.7 1.9
1 GbE 37 2.5 5 10 20
10 GbE 3.7 0.25 0.5 1 2
25 GbE 1.5 0.1 0.2 0.4 0.8
40 GbE 0.9 0.06 0.12 0.24 0.5
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Wire Speed Latency Update
Network Speed Delay Lines
2K/60 4K/60 4k/120 8K/120
Line Time usec 14.8 7.4 3.7 1.9
1 GbE 37 2.5 5 10 20
10 GbE 3.7 0.25 0.5 1 2
25 GbE 1.5 0.1 0.2 0.4 0.8
40 GbE 0.9 0.06 0.12 0.24 0.5
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Wire Speed Latency Update
Network Speed Delay Lines 2014 2017 2020
2K/60 4K/60 4k/120 8K/120
Line Time usec 14.8 7.4 3.7 1.9
1 GbE 37 2.5 5 10 20
10 GbE 3.7 0.25 0.5 1 2
25 GbE 1.5 0.1 0.2 0.4 0.8
40 GbE 0.9 0.06 0.12 0.24 0.5
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Bound the Problem
Time of Day – Only important to your PVR
Sampling time – Too fast to perceive
Nanoseconds and Microseconds
Media Time – Sets the constraint
Video: mutual to a line ( ~15 usec )
Audio Image: mutual to a sample ( ~20 usec )
Lip Sync: audio to video ( -10 msec to + 30 msec )*
* Courtesy BBC ITU-R BT.1359
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System Timing in Broadcast
Wire Speed
Multiple Paths
Delay Spread < 1 Line of Video
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System Timing Using IP Reference
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System Timing with Integrated IP
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System Timing with Integrated IP
Wire Speed
Multiple Paths
Delay Spread < 1 Line of Video
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Strategy for Timing
• Source time cameras and mics
• Data buffers exist at end-points
• Digital SDI works this way today
• Today’s facilities are Time of Flight
• IP can be managed this way as
well
– And in the future PTP enables more
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Strategy to Reduce Cabling
$ per signal per physical network
segment
UHDTV
Gamut, HDR, HFR
4K, 8K, etc…
Lite Compression
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Lite Compression Defined
Visually lossless and multi-pass
Latency measured in lines
Low cost hardware
Low power
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Mezzanine Compression 4:1
Network Speed Delay 2014 2017 2020
8 Lines 2K/60 4K/60 4k/120 8K/120
3 Gbps 12 Gbps 24 Gbps 96 Gbps
3 Gbps 6 Gbps 24 Gbps
10 GbE 3 3 1
25GbE 8 8 4 1
40 GbE 13 13 6 1
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Clean On-Air Switch
A/B Master Control
Upstream pre-select Program
Pre-set
100+ Inputs
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Clean On-Air Switch in IP
Clean Switch
Edge Switch
End-Point Switch
IGMP Leave and Join
Program
Pre-set
100+ Inputs
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3 Possible Strategies to Switch
Source Changing source ports, or IP addresses is new control paradigm
In the fabric
Mimics broadcast. Solutions will be coming to market.
End-Point
The easiest to implement
Replicates current up-stream pre-select model
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10 GbE Enables Live
Fabric delay with jitter is bounded: < ½ Video Line
Source timed, deterministic systems perform
equally with today’s SDI
Time of flight design still works just like SDI
Upstream pre-select models stay the same
Familiar control surfaces still manage the facility
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10 GbE Empowers the Future
Intelligent process flows
Multiple ROI models
Bandwidth scalability easily adapts to new formats
Sophisticated timing models
Location independence
Control Room, Sources, or both
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Thank You [email protected]