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Video: Scalable Video Coding in HEVC & AV1

Posted on 22nd February 2019 by Russell Trafford-Jones

While it has never played a big role in practical applications, scalable video coding has been around since the times of MPEG 2, and might actually have some advantages over the multi-rate transmission often applied today. The purpose of scalable coding is to efficiently compress multiple different versions of the same video in one “scalable” bitstream. Actually this sounds like the perfect solution for VOD and streaming applications, but unfortunately it has some downsides and few vendors ever used it. In this talk, Chrstian will review the basic idea of scalable coding, how it is enabled in modern coding standards and the pros and cons of implementing the technology in streaming applications.

Speaker

Chrisitan Feldmann
Codec Engineer,
Bitmovin

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

Posted on 12th February 2019 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
Chief Science Officer,
SSIMWAVE Inc.

Video: The AV1 Video Codec

Posted on 11th February 2019 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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