From SDI Baseband to IP Routing: An Essential & Timely Migration

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  • 25.06.2015

Whitepaper - From SDI Baseband to IP Routing: An Essential & Timely Migration


While the Television industry has been well served by SDI Baseband technology including routers, coax cable and BNC connectors, new IP-based video/audio infrastructure and workflows are promising far more flexible and cost-effective solutions in the future. However, the new IP-based world must still interoperate with and build upon existing Baseband technology. This Lawo / Arista Networks White Paper explores a practical technology solution: A Software Defined Video IP Network using Lawo’s Encapsulators, Gateways and Edge Processors, integrated with Enterprise-level high performance IP switching from Arista. The combination promises to advance and automate Television work-flows to meet near and long term demands of production, contribution, distribution and content delivery... and do it cost effectively.

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Loudness Metering

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  • 24.05.2011

White Paper - Loudness Metering

Unfortunately, it has become normal and necessary to re-adjust the loudness when “zapping” between channels. The same variance in loudness sometimes occurs at the beginning of TV commercials. Not surprisingly, viewers have complained about these variances in TV programming repeatedly. They are caused by many factors, but there is one common denominator: until today, there is no solution to measure the subjective parameters of loudness perception objectively and precisely. Measuring equipment currently used in audio production does not allow for an assessment of the subjective parameter loudness. Rather, the devices are designed to show the peak voltage of an audio signal, making it impossible to assess the subjective loudness. Quasi Peak Programme Meters (QPPM) are very commonly used among broadcasters. However, with an integration time of 10ms (cf. ARD specifications [Pf3/6]) they are unable to display real peaks. Yet, the detection of these is essential for work involving digital signals.