Low latency Archives – Page 10 of 14 – The Broadcast Knowledge

Video: An Overview of the ISO Base Media File Format

Posted on 24th May 2019 by Russell Trafford-Jones

ISO BMFF a standardised MPEG media container developed from Apple’s Quicktime and is the basis for cutting edge low-latency streaming as much as it is for tried and trusted mp4 video files. Here we look into why we have it, what it’s used for and how it works.

ISO BMFF provides a structure to place around timed media streams whilst accommodating the metadata we need for professional workflows. Key to its continued utility is its extensible nature allowing additional abilities to be added as they are developed such as adding new codecs and metadata types.

ATSC 3.0’s streaming mechanism MMT is based on ISO BMFF as well as the low-latency streaming format CMAF which shows that despite being over 18 years old, the ISO BMFF container is still highly relevant.

Thomas Stockhammer is the Director of Technical Standards at Qualcomm. He explains the container format in structure and origin before explaining why it’s ideal for CMAF’s low-latency streaming use case, finishing off with a look at immersive media in ISO BMFF.

Watch now!

Speaker

Thomas Stockhammer
Director Technical Standards,
Qualcomm

Video: Sub-Second Live Streaming: Changing How Online Audiences Experience Live Events

Posted on 10th May 2019 by Russell Trafford-Jones

There are two main modern approaches to low-latency live streaming, one is CMAF which used fragmented MP4s to allow frame by frame delivery of chunks of data. Similar to HLS, this is becoming a common ‘next step’ for companies already using HLS. Keeping the chunk size down reduces latency, but it remains doubtful if sub-second streaming is practical in real world situations.

Steve Miller Jones from Limelight explains the WebRTC solution to this problem. Being a protocol which is streamed from the source to the destination, this is capable of sub-second latency, too, and seems a better fit. Limelight differentiate themselves on offering a scalable WebRTC streaming service with Adaptive Bitrate (ABR). ABR is traditionally not available with WebRTC and Steve Miller Jones uses this as an example of where Limelight is helping this technology achieve its true potential.

Comparing and contrasting Limelight’s solution with HLS and CMAF, we can see the benefit of WebRTC and that it’s equally capable of supporting features like encryption, Geoblocking and the like.

Ultimately, the importance of latency and the scalability you require may be the biggest factor in deciding which way to go with your sub-second live streaming.

Watch now!

Speakers

Steve Miller-Jones
VP Product Strategy,
Limelight Networks

Webinar: Deliver global sub-second live streaming experiences to increase viewer engagement

Posted on 18th March 2019 by Russell Trafford-Jones

Date: Thursday March 21st, 2019
Time: 15:00 GMT

With live online viewing delayed by up to 30 seconds or more compared to broadcast TV, enriching the viewing experience with online content, while ensuring that all viewers see the action at the same time, is a significant challenge. To provide viewers with engaging online experiences that keep them coming back for more, service providers need true real-time streaming.

This webinar will cover questions such as:

How important is latency for live online streaming?
Which live streaming workflows offers the greatest opportunity to generate additional revenue?
What are the main challenges faced by online video service providers when live-streaming major events such as sports tournaments?

Being a webinar from Limelight, you will also hear

How Limelight realtime streaming minimizes latency
How to reach the widest audience with native browser support
How to enable new business models with interactivity
How to reach viewers everywhere

All this along with key findings from DTVE’s industry survey, showing that industry executives believe live streaming could ultimately supplant broadcast technology, but challenges remain.

Speakers

	Steve Miller-Jones Vice President of Product Strategy, Limelight Networks
	Stuart Thomson Editor, Digital TV Europe

Video: VP9 Transcoding for Live eSports Broadcast

Posted on 6th March 2019 by Russell Trafford-Jones

VP9 is a well-known codec, but it hasn’t seen many high-profile, live deployments which makes Twitch’s move to deliver their platform using VP9 in preference over AVC all the more interesting.

Here, Yueshi Shen from Twitch, explains the rationale for VP9 by explaining the scale of Twitch and looking at their AVC bitrate demands. He explains the patent issues with HEVC and VP9 then looks at decoder support across devices and platforms. Importantly, encoder implementation is examined leading to Twitch’s choice of FPGA to provide live encoding.

Yueshi then looks at the potential of AV1 to Switch_Frame to provide low-latency broadcast at scale.

Watch now!

Speaker