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From
gigaom
Content companies including Viacom and HBO have met with folks from Comcast, Qwilt and others to discuss transparent caching as a way to solve the problem of online video. 
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MPEG DASH is hot news. Widely anticipated to become the 'de facto' delivery standard, this session is part presentation -- to bring you up to speed on what MPEG DASH is -- and part opportunity to ask questions of one of the instigators of the standard.
Nicolas Weil's insight:
Interesting speach by Alex Zambelli on Microsoft DASH roadmap, from the 26th minute. Development track to confirm at IBC... 2013...
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Because content delivery networks (CDNs) are at the heart of next-generation IP video infrastructure, they are the logical place to add personalization. With the right approach, service providers can take advantage of the CDN replication model while delivering personalized content. At the same time, they can ensure the network scales to achieve quality expectations.
There are many good reasons to personalize content, including : - Targeted ads - Emergency alerts - Blackouts - Quality adjustments
To take control of the delivery mechanism, service providers must build a server-side version of the client-based adaptive streaming concept. Introducing two new components will bring more intelligence and processing power into the CDN to improve overall HTTP behavior and performance: A session manager retrieves the contextual information needed to customize the content and tell the cache in the CDN which changes to apply to the content.A video processor in the cache generates the new content to be sent to end users based on the original content and the information delivered by the session manager.
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Partnership announcements and a session at the recent Content Delivery Summit highlight a major convergence trend.
At the 2012 Content Delivery Summit, held May 14 at the same New York City venue as the 2012 Streaming Media East conference, vendors in the transparent caching space laid out the vision for a convergence between content delivery networks (CDNs) and transparent caching technologies.
While transparent caching has been around for several years -- the acquisition of Ankeena Networks by Juniper in 2010 is one example -- the recent trend to combine transparent caching and CDNs has struck a nerve across the industry.
One example of a partnership that's intent on creating a unified delivery infrastructure is the recent announcement between Jet-Stream and Oversi. Jet-Stream provides CDN solutions for telecoms and network operators around the globe, with its primary focus in Europe and South America, while Israel-based Oversi has won a number of transparent caching projects in the same geographies.
With the intention of improving both end-user experience quality and network economics, the Jet-Stream-Oversi partnership is driven as much by customer demand as it is by the potential technological synergies.
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Today, Netflix announced that they have been actively working to build out their own network of caches inside ISP networks and have officially launched the "Netflix Open Connect Content Delivery Network". With this offering, Netflix aims to lower their CDN costs, rely less on third party CDNs, provide higher quality streaming and most importantly, give network operators more control over the video that flows through their pipes.
To support the launch of their CDN, Netflix has a new website at openconnect.netflix.com which gives ISPs more details on the hardware and software design of Netflix's caches, details on how ISPs can peer with Netflix and access to a deployment guide. While many might compare what Netflix is doing with their cache deployment to what Google has been doing for years, the big difference is that Netflix is giving ISPs control over the caches, allowing them to adjust the volume of traffic flowing through their network. This is a smart move on Netflix's part as many ISPs don't view Google caches as being friendly because once placed inside the operators network, they can only be controlled by Google.
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TV broadcasting network operators need to find better ways to increase their capacity. Charlie Baker from PeerApp explained at IPTV World that TV broadcasters need more efficient ways to use their network bandwidth as media consumption shifts from linear to on demand. A key way to get significant network bandwidth savings is to use statistical caching.
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Transparent caching specialist Qwilt has introduced Qwilt Live Stream Cache, a software solution that enhances the company's QB-Series Video Fabric Controllers. The solution replaces the existing unicast model, where each viewer has a dedicated HTTP session, and replaces it with a shared stream model. Qwilt Live Stream Cache is able to identify popular live streams on its own, then store those streams to the controller's FastCache. This dedicated storage area has been optimized to deliver live streams quickly. Next, the Qwilt Live Stream Cache creates a local live video transmission point for each area, letting a large group of viewers share a single video stream.
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Nicolas Weil's insight:
Interesting information set on the Open Connect program & appliances
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In a real deployment scenario, playback should be as robust as possible in the face of server-side problems. As our architecture stands today, playback can suffer from two problems regardless of the amount of backend redundancy that is deployed. Those problems are liveness, where a packager advertises a stale view of live, and dropout, where a packager has gaps in its fragment list.
HDS/HLS fail-over is the server side solution to solve the live-ness and dropout problems in HDS/HLS respectively.
This article describes a basic failover setup with redundant packagers and Varnish as a reverse proxy. The article further provides users a step-by-step guide to writing a basic varnish configuration script to configure Varnish for the failover solution.
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Today, Netflix announced OpenConnect, a way for Internet Access providers to extend Netflix own CDN.
This approach is very much in line with the trend that Jet-Stream predicted: Content Publishers want to be in full control of their workflow chain, right down to delivery.
Next to telco CDNs, publisher CDNs are yet another potential threat to Internet CDNs whose best effort infrastructure simply does not live up to the expectations and requirements from premium content providers.
Maybe even a bigger threat since this is a massive signal to the CDN industry that content publishers are not just technically able but also have the strategy to directly work with access providers. This is their customers saying: let's cut out the man in the middle.
READ OpenConnect webpage outside US : http://ip.fi/%7Ekajtzu/openconnect%20site%20dump.pdf
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Oversi, the leader in OTT Video and P2P caching solutions, and Jet-Stream, the award-winning market leader in Content Delivery Network (CDN) technologies, today announced a strategic collaboration to provide a converged content delivery solution for network operators.
Dan Rayburn, EVP, StreamingMedia.com said: “Carriers are desperately trying to control managed and unmanaged content on their network. A converged CDN and Transparent Caching solution allows the carrier to enable a better QoS, reduce their internal costs, and in the long run provide revenue generation and new content services.”
This new partnership brings together Jet-Stream’s best-in-class CDN technology and Oversi’s solution-of-choice Transparent Caching. Indicating a milestone in the content delivery market, this partnership provides operators a flexible solution that is easy to deploy in many different network scenarios, and a future proof architecture with the highest performance, scalability and reliability.
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