codecs

Video: Encoding efficiencies and techniques

Posted on by Russell Trafford-Jones

Ed Silvester heads up video R&D at Perform Group, since rebranded to DAZN (pronounced ‘dah zone’) so he’s just the man to talk us through the business aspects of encoding. Anchoring the conversation in the times that black and white TV changed to colour, Ed looks at the challenges DAZN have in creating an innovative platform with backwards compatability.

Ed considers whether the industry should DIET, shedding some older technologies (watch the talk to find out what DIET stands for). And raises some questions about how the industry should deal with platforms ending, scaling and compatibility.

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For more detail on codecs, watch Ian Trow’s talk also from the Northern Waves conference.

Speaker

Ed Silvester Ed Silvester
Head of Video R&D,
DAZN (AKA Perform Group)

Video: VP9 Transcoding for Live eSports Broadcast

Posted on 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

Yueshi Shen Yueshi Shen
Principal (Level 7) Research Engineer & Engineering Manager,
Twitch

Video: AV1 vs. HEVC: Perceptual Evaluation of Video Encoders

Posted on by Russell Trafford-Jones

Zhou Wang explains how to compare HEVC & AVC with AV1 and shares his findings. Using various metrics such as VMAF, PSNR and SSIMPlus he explores the affects of resolution on bitrate savings and then turns his gaze to computation complexity.

This talk was given at the Mile High Video conference in Denver CO, 2018.

Speakers

Zhou Wang Zhou Wang
Chief Science Officer,
SSIMWAVE Inc.

Video: The AV1 Video Codec

Posted on by Russell Trafford-Jones

AV1 implementations are still being worked on along a number of fronts and the business cases are starting to shake out. Here’s a developer-focused look at AV1 from patents to the way it works and to lessons learnt implementing it.

It was last year that the Alliance for Open Media released its next-generation video codec AV1. It achieves better compression than proprietary competitors, while its patents can be licensed via a royalty-free, open-source friendly license. With a broad array of industry support including all major browser vendors, many hardware partners, internet streaming video and conferencing providers, many think this is the best chance yet to create a successful video codec of its type that achieves wide deployment.

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Speakers

Timothy B. Terriberry Timothy B. Terriberry
Developer,
Xiph.org