Video

Video: Next Generation Broadcast Platform – ATSC 3.0

Posted on by Russell Trafford-Jones

Continuing our look at ATSC 3.0, our fifth talk straddles technical detail and basic business cases. We’ve seen talks on implementation experience such as in Chicago and Phoenix and now we look at receiving the data in open source.

We’ve covered before the importance of ATSC 3.0 in the North American markets and the others that are adopting it. Jason Justman from Sinclair Digital states the business cases and reasons to push for it despite it being incompatible with previous generations. He then discusses what Software Defined Radio is and how it fits in to the puzzle. Covering the early state of this technology.

With a brief overview of the RF side of ATSC 3.0 which itself is a leap forward, Jason explains how the video layer benefits. Relying on ISO BMMFF, Jason introduces MMT (MPEG Media Transport) explaining what it is and why it’s used for ATSC 3.0.

The next section of the talk showcases libatsc3 whose goal is to open up ATSC 3.0 to talented Software Engineers and is open source which Jason demos. The library allows for live decoding of ATSC 3.0 including MMT material.

Finishing his talk with a Q&A including SCTE 34 and an interesting comparison between DVB-T2 and ATSC 3.0 makes this a very useful talk to fill in technical gaps that no other ATSC 3.0 talk covers.

Complete slide pack

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Speakers

Jason Justman Jason Justman
Senior Principal Architect,
Sinclair Digital

Video: The ST 2094 Standards Suite For Dynamic Metadata

Posted on by Russell Trafford-Jones

Lars Borg explains to us what problems the SMPTE ST 2094 standard sets out to solve. Looking at the different types of HDR and Wide Colour Gamut (WCG) we quickly see how many permutations there are and how many ways there are to get it wrong.

ST 2094 carries the metadata needed to manage the colour, dynamic range and related data. In order to understand what’s needed, Lars takes us through the details of the HDR implementations, touching on workflows and explaining how the ability of your display affects the video.

We then look at midtones and dynamic metadata before a Q&A.

This talk is very valuable in understanding the whole HDR, WCG ecosystem as much as it is ST 2094.

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Speaker

Lars Borg Lars Borg
Principal Scientist,
Adobe

Video: WebRTC: The Future Champion of Low Latency

Posted on by Russell Trafford-Jones


With the continual quest for lower and lower latencies in streamed video, WebRTC is an attractive technology with latencies in the milliseconds rather than seconds. Limelight’s lowest latency offerings are based on WebRTC.

Alex Gouaillard from millicast explains the brief history and current status of WebRTC including which browsers are supported. After talking about optimisations that have been made, he talks about Bandwidth Adaptive Media and other use cases to be solved.

Supported codecs and, importantly, Scalable Video Coding support is discussed along with ways of implementing WebRTC. Alex also talks about the testing that’s gone in to the standard looking at bandwidth and latencies.

Lastly, a key question around WebRTC is ‘does it scale’ which is discussed before the conclusion.

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Speaker

Alex Gouaillard Alex Gouaillard
CTO,
millicast

Video: Recent Experiences with ATSC 3.0 from Seoul to Phoenix

Posted on by Russell Trafford-Jones

This talk is part of a series of talks on ATSC 3.0 we’re featuring here on The Broadcast Knowledge. ATSC 3.0 is a big change in terrestrial television transmission because even over the air, the signal is IP.

In this talk, Joe Seccia from GatesAir, a company famed for its transmission systems, talks us through where the US (and Seoul) is on its way to deploying this technology.

With major US broadcasters having pledged to be on air with ATSC 3.0 by the end of 2020, trials are turning in to deployments and this is a report back on what’s been going on.

Joe covers the history of previous tests and trials before taking us through the architecture of a typical system. After explaining the significance of the move to IP, Joe also covers other improvements such as using OFDM modulation and thus being able to use a single frequency network (SFN). This combination of technologies improves reception and coverage over the 8VSB transmissions which went before it.

We also hear about the difference between home and broadcast gateways in the system as well as the Early Alert System Augmentation features which allow a broadcaster to ‘wake up’ TVs and other devices when disasters strike or are predicted.

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Speakers

Joe Seccia Joe Seccia
Manager, TV Transmission Market and Product Development Strategy,
GatesAir