In Broadcast - December 2011/January 2012 - 91

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InFILE
H.264 Encoding And Delivery For Mobile
By Peter Maag, Chief Marketing Officer Haivision
As broadcasters increasingly target mobile devices for video delivery, they’re embracing H.264 compression technologies to ensure a top-quality video experience. Selecting the right encoder and methodologies throughout the entire media delivery ecosystem is critical in delivering the best video experience to users. Not all mobile devices support all formats; however, most mobile video transports support the H.264 codec (also known as MPEG-4 AVC or MPEG-4 Part 10). Firstgeneration mobile devices relied heavily on Adobe® Flash®, QuickTime® or Windows® Media, but all of these transports now support H.264. H.264 is now the accepted standard for communications, broadcast, and streaming applications, and is embedded within Flash, Silverlight®, QuickTime, iPhone®, iPOD®, PlayStation™, Nero®, HD DVD, and Blu-ray™ Disc technologies. Bandwidth and storage savings is perhaps the strongest driver for H.264’s acceptance. The codec can reduce bandwidth costs by up to 60%. H.264 can stream higher quality with low latency and less bandwidth consumption compared to other compression standards – ideal for transmission over 3G cellular networks.
Peter Maag

No.1 for monitors
streams of the same content but at different bandwidths (and other encoding parameters such as resolution, frame rate, etc.).

Encoding Systems

When evaluating encoding systems using H.264, one thing to keep in mind is the complexity of the standard, which requires eight times the processing power for encoding and three times the processing power for decoding. Encoding systems can be either hardware or software based. While hardware based systems typically have a performance edge overcoming latencies, software systems typically have higher quality and flexibility. Software systems also have the advantage of scaling over time with rapid advances in open platform computing power. Although bulky (being server platform based) and sometimes difficult to setup and keep running (for Windows platform based systems), software system do achieve higher quality, bandwidth efficiency, and output flexibility with regard to the number of streams and formats.

In the world of picture monitors, all may not be as it might seem. The metrics of an LCDs performance can be a blur and even products from global brands may not live up to expectations. At Oxygen DCT, we are number 1. We specialise in monitors and have the largest range with 105 product choices. With our advice, guidance and wide selection, you are assured of the best monitoring solutions, from simple quad racks and low cost displays right through to grade 1 reference monitors. We also supply multiviewer systems and even build turnkey monitor walls, making life simpler for our clients.

91

Delivery Topology

Mobile Delivery

For mobile delivery the biggest challenge lies in the bandwidth and decoding capabilities of the device itself – since each device has different capacities and different resources to work with. Because of that, the streams need to be prepared or preformatted accordingly based on the target audience, which determines which mobile device is being used. This task is greatly simplified with H.264, since it’s the one compression type that can be decided by most devices on the market today. To accommodate variances in network and device capabilities two common techniques have emerged – Dynamic (for RTMP Flash) and Adaptive (for HTTP Live Streaming on Apple iOS and other systems) streaming. Both techniques rely on providing synchronised H.264

When establishing internet streams from event sites the optimal configuration is to send 10 streams to the “cloud” – five varying bitrate streams for Dynamic Flash and five varying bitrate streams for adaptive HLS. This is clearly not the most optimal use of bandwidth – 10 streams of the same source. Technologies such as MPEG SVC (Scalable Video Coding) have promised to eliminate this inefficiency but the distribution challenges remain. Instead the market is turning rapidly to cloud transcoding to optimise contribution bandwidth and take advantage of the computing power available in the cloud. With cloud transcoding a single optimised high resolution stream can be sent from the event to the cloud and at that point transcoded to multiple bitrates and formats for onward delivery. It is these efficiencies that the combination of Haivision’s KulaByte encoders and HyperStream cloud transcoders deliver.

Broadcasters, post houses and location crews around the world have chosen our monitors for live global events, programme production and grading. Contact us today for your free Guide to LCDs or to discuss how we may help you. Only Oxygen DCT gives you a choice of 105 different monitors so that you get precisely what you need. tel: +44 (0)8707 4 62062 fax: +44 (0)8707 4 62063 email info@oxygendct.com


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In Broadcast - December 2011/January 2012

Table of Contents for the Digital Edition of In Broadcast - December 2011/January 2012

In Broadcast - December 2011/January 2012
Content
Immortal Images: Nuoda & Film Factory
Film Tails Out
IABM Report Revieals New Insights
Masstech Emerald 7.5 LE Preserves Vital Assets
Sneak Peek
Robotics in the Newsroom
Sislive America's World Cup
Expo World Travel Comments on Services
Transcoding: Getting There Faster
In Broadcast - December 2011/January 2012 - In Broadcast - December 2011/January 2012
In Broadcast - December 2011/January 2012 - 2
In Broadcast - December 2011/January 2012 - Content
In Broadcast - December 2011/January 2012 - Immortal Images: Nuoda & Film Factory
In Broadcast - December 2011/January 2012 - 5
In Broadcast - December 2011/January 2012 - 6
In Broadcast - December 2011/January 2012 - 7
In Broadcast - December 2011/January 2012 - 8
In Broadcast - December 2011/January 2012 - 9
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In Broadcast - December 2011/January 2012 - 16
In Broadcast - December 2011/January 2012 - 17
In Broadcast - December 2011/January 2012 - 18
In Broadcast - December 2011/January 2012 - 19
In Broadcast - December 2011/January 2012 - Film Tails Out
In Broadcast - December 2011/January 2012 - IABM Report Revieals New Insights
In Broadcast - December 2011/January 2012 - 22
In Broadcast - December 2011/January 2012 - 23
In Broadcast - December 2011/January 2012 - 24
In Broadcast - December 2011/January 2012 - 25
In Broadcast - December 2011/January 2012 - 26
In Broadcast - December 2011/January 2012 - Masstech Emerald 7.5 LE Preserves Vital Assets
In Broadcast - December 2011/January 2012 - Sneak Peek
In Broadcast - December 2011/January 2012 - 29
In Broadcast - December 2011/January 2012 - 30
In Broadcast - December 2011/January 2012 - 31
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In Broadcast - December 2011/January 2012 - 51
In Broadcast - December 2011/January 2012 - 52
In Broadcast - December 2011/January 2012 - 53
In Broadcast - December 2011/January 2012 - 54
In Broadcast - December 2011/January 2012 - Robotics in the Newsroom
In Broadcast - December 2011/January 2012 - 56
In Broadcast - December 2011/January 2012 - 57
In Broadcast - December 2011/January 2012 - 58
In Broadcast - December 2011/January 2012 - 59
In Broadcast - December 2011/January 2012 - 60
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In Broadcast - December 2011/January 2012 - 66
In Broadcast - December 2011/January 2012 - 67
In Broadcast - December 2011/January 2012 - Sislive America's World Cup
In Broadcast - December 2011/January 2012 - 69
In Broadcast - December 2011/January 2012 - 70
In Broadcast - December 2011/January 2012 - 71
In Broadcast - December 2011/January 2012 - 72
In Broadcast - December 2011/January 2012 - 73
In Broadcast - December 2011/January 2012 - Expo World Travel Comments on Services
In Broadcast - December 2011/January 2012 - 75
In Broadcast - December 2011/January 2012 - 76
In Broadcast - December 2011/January 2012 - 77
In Broadcast - December 2011/January 2012 - 78
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In Broadcast - December 2011/January 2012 - 89
In Broadcast - December 2011/January 2012 - 90
In Broadcast - December 2011/January 2012 - 91
In Broadcast - December 2011/January 2012 - Transcoding: Getting There Faster
In Broadcast - December 2011/January 2012 - 93
In Broadcast - December 2011/January 2012 - 94
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