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EETE JULAUG 2015

Audio & Video processing frequency-based Fourier transformation or wavelet transformation. By leveraging massively parallel processing power, the V-Nova team developed for Perseus a new mathematical transformation that can deal with “correlations in each video image properly,” according to Meardi. With the demand for high-quality images at high frame rates, “there are a lot more repetitions in the frames we are sending,” said Meardi. Without revealing details, he said that with correct correlations, Perseus has potential to do lossless video compression. Other secret ingredients incorporated in Perseus include its hierarchical nature and its ability for creating a single file that can be delivered to devices in multiple scales. Hierarchical structure is critical, because Perseus is designed to allocate data progressively, adding more details as necessary. In the past, the MPEG community also worked on scalable video coding and added that feature in 2007, Meardi explained. “But it was more of a patch bolted on top of a codec that was not originally designed for.” Peeling away an onion Perseus’ multiple-scale nature can be best explained as “peeling away an onion,” as Meardi put it. Rather than encoding video tens of times in different formats, “you can maintain a single file and stream it to different devices with different capabilities. If an end-device can only decode MPEG-2, it just decodes MPEG-2 while ignoring the rest,” Meardi said. This scalable feature becomes a huge advantage for inventory management, Achtmann said. Imagine if you have to create, say 19 different files of one single asset for multiple deliveries, and need to manage that in a library of thousands of assets, he explained. While the feature for no-need-to-save-multiple files means big savings in server space, even bigger implications lie in the bandwidth use of network infrastructure — whether satellite, cable or Content Delivery Networks for the Internet. Rather than setting aside a special bandwidth for an HDTV stream in addition to an SD stream, operators will be able to send a single stream. According to Cisco report, mobile video traffic exceeded 50 percent of total mobile data traffic for the first time in 2012 and grew to 55 percent by the end of 2014. Predicting that 75 percent of mobile data traffic will soon be occupied by video delivery, driven by only the 10 percent of subscribers who stream video, Achtmann pointed out that easing the growing network infrastructure strain is one of the biggest issues the telecommunication industry faces. Achtmann concluded that Perseus is solving three problems previously insoluble: 4K distribution, HD on mobile, and video delivery to a Third World population who have neither 3G nor 4G. Meanwhile, Perseus is also making what are already possible “more profitable” for operators, he added. Webcams move to 4K panoramic video By Julien Happich Founded in 2013 and having secured two rounds of funding, including a Series B round of $10.5M from Intel Capital back in 2014, California-based startup Altia Systems has just launched its PanaCast2 Personal Panoramic Video System. The plug-and-play USB video camera which integrates three tiny cameras boasts 3840x1080 pixels 4K resolution with a panoramic view spanning 180° horizontal for a 54° tall field of view. The high resolution and wide viewing angles make it suitable for room-sized web and video conferencing without the use of electro-mechanical pan, tilt and zoom cameras. The camera comes complete with cloud services and apps, supporting touch-enabled controls that allow all the participants to see what they want to view within the visual field in real-time — and independently of each other. For a distortion-free natural looking perspective, the 3840x1080 pixel frames are rendered onto a mathematicallycorrect cylindrical surface, yet video latency is claimed to be less than 15ms from photons to USB data output. Expected to ship early in the third quarter at USD995 with PanaCast Experience service user licenses starting at $19.99 per active user per month, the plug-and-play camera is clearly aimed at the enterprise market where it will enhances popular collaboration applications like Microsoft Skype for Business, Skype, Cisco WebEx, Google Hangouts, Citrix GoToMeeting, Vidyo, Zoom, and others without requiring any driver or software installs. As well as backing the startup company, Intel is engaged in an engineering pilot with Altia Systems’ firstgeneration Pana- Cast cameras to bring the best out of this new product on Intel Core processor-based PCs. 28 Electronic Engineering Times Europe July-August 2015 www.electronics-eetimes.com


EETE JULAUG 2015
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