• PDX Video Tech 2019 (1)

    Alchemy Code Lab

    Please join us down at Alchemy Code Labs for an exciting night of discussions around video technology. Alchemy is right across 10th Ave, from Powell's Books Store. We will be upstairs. Follow the signs for PDX Video Tech. This will be our group’s second meetup and first 2019 meeting! If you are interested in presenting at this meetup, please email us at [masked] with topic and details. *************************************** Schedule: Doors open 6:30 pm 6:30 - 6:45 - Networking and Introductions 6:45 - 7:15 - Talk 1 - Non-Reference Picture Quality Assessment 7:15 - 7:30 Break/Change Speakers 7:30 - 8:00 - Talk 2 - Adaptive Streaming Series 1 of 3 After the event we plan to go to a local bar to keep the conversation going. Please feel free to join the group! *************************************** Presenter 1: Andrew Scott Application Engineer, Video Product Line @ Tektronix Topic Non-Reference Picture Quality Assessment Summary An objective picture quality measurement is an extremely useful tool in the video engineer’s toolbox, to assist making encoding and network optimizations that improve the viewer’s experience. Traditional PQ measurements have required a reference video from which a comparison measurement can be made. This presentation describes a machine learning algorithm that produces a model from which a non-reference measurement can be made in real-time. Presenter 2: Dan Sparacio Senior Software Engineer @ CBS Interactive Topic Adaptive Streaming Series 1 of 3 Summary This will be a three part series building from basic concepts in Adaptive bitrate switching/how streaming media works today, to advance concepts and discussion around award winning ABR heuristics, industry standards and publications. We will dive into how encoding, players, and CDNs work together to make broadcast quality streaming possible.

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  • PDX Video Tech 2018 (1)

    Alchemy Code Lab

    Alchemy is right across 10th from Powell's Books in a brick exterior building. No code will be needed! Doors open at 6:30pm This will be our group’s first and only 2018 meetup! Please join us down at Alchemy Code Labs for an exciting night of discussions around video technology. *************************************** Schedule: Doors open 6:30 pm 6:30 - 6:45 - Networking 6:45 - 7:00 - Introduction to the Group (Hosts) 7:00 - 7:30 - Towards Measuring Perceptual Video Quality & Why 7:30 - 8:00 - Low Latency Over HTTP After the event we plan to go to a local bar to keep the conversation going. Please feel free to join the group! *************************************** Speakers: 1. Vasavee Vijayaraghavan, Cloud Media Solutions Engineer (Intel) 2. Nicolas Weil, Senior Solutions Architect (AWS Elemental) *************************************** Topic 1: Towards Measuring Perceptual Video Quality & Why - Vasavee Vijayaraghavan Video quality measurement is an essential step in any media pipeline. There are quite a few objective metrics available today including well known SSIM & PSNR. These objective metrics are not real time to be used in a live encoder workflow, but fast enough to do quick offline video quality analysis. The challenge with such objective metrics though, is that they are not truly representative of video quality as our human eyes perceive it, thus making it hard for optimizations such as bitrate reduction. To make decisions such as adding or reducing a certain amount of bitrate while maintaining the same subjective video quality, we need to rely on alternative methods. This talk will thus focus on understanding perceptual video quality and evaluating such alternative methods to make reliable decisions. Among many insights that will be shared, some of them will include: BD-Rate curves, existing rate control methods, gaps in using objective video quality metrics, perceptual video quality evaluation tools & benefits, using alternative methods. *************************************** Topic 2: Low Latency Over HTTP - Nicolas Weil With OTT video streaming, reducing end-to-end latency is a timely topic. Hearing neighbors cheer for a goal, or reading results on Twitter before seeing them live is a compromised viewing experience. In this presentation, Nicolas will go through why latency for streaming video is a challenge, how it is measured, what viewer expectations are for broadcast and faster-than-broadcast, how latency can be improved in existing workflows and how new technologies like Chunked CMAF are coming to help.

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