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A Guide to Testing IPTV: Technologies and Challenges Par...

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High consumer expectations have put pressure on content producers, network operators and equipment manufacturers to deliver consistently high quality audio and video to their end users. The proliferation of enabling technologies has resulted in a wide variety of formats and standards adding to the complexity of the challenges faced in establishing...

Submitted by Dennis Lennie

Published 01 August 2009

Jargon Buster

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IPTV: The delivery of broadcast quality video over an IP network. Set-Top Box: The consumer equipment which acts as the interface between the user and the IPTV services provided by the network (converts signal to content which can then be displayed on the television screen) VoD: Video on Demand NDVR: Network Digital Video Recording (allows fe...

Submitted by Dennis Lennie

Published 01 August 2009

HD Camera Measurements. Getting the most out of your came...

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Recap previous Parts:While the first parts covered the theory and actual measurements of white shading, setting up colorimetry, exposure, greyscale adjustments, alignment and matching of cameras using a waveform monitor, this final part is devoted to providing a better understanding of the displays used. Interpreting a waveform monitor displayA Wav...

Submitted by Dennis Lennie

Published 01 July 2009

NAB 2009 report

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By general consensus, this year's NAB Spring Convention, or 'NABshow' as it styles itself, was one of the best ever. Wider aisles and a respectable rather than manic level of attendance made the event, in the words of one exhibitor, 'Business Class'. NAB was always the prototype show where you could sense the directions in which manufacturers were...

Submitted by Dennis Lennie

Published 01 July 2009

HD Camera Measurements. Getting the most out of your came...

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Recap previous Parts:The first parts covered the theory and actual measurements of white shading, setting up colorimetry and exposure as well as greyscale adjustments using a waveform monitor. The objective was to provide a thorough understanding of the functions and benefits of using a waveform monitor when addressing non-linear effects in the cam...

Submitted by Dennis Lennie

Published 01 June 2009

Delivering Superior Quality of Service in IPTV Networks

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To maintain differentiation in a competitive triple play market, the key operational challenge for telecommunications operators is how to efficiently deliver superior quality of service (QoS) levels. Intuitive use and simplified presentation of video quality and telecom transmission information are essential to win and keep customers. The video and...

Submitted by Dennis Lennie

Published 01 June 2009

Eye to Eye. Whats new in test and measurement 2009

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The transition from analogue to digital programme production, storage and delivery lulled some innocent folk into anticipating a world without need for test equipment. If required at all, so the thinking went, all signal analysis would be performed in software. Maybe someday. For now, the T&M sector remains alive and well. The following summary out...

Submitted by Dennis Lennie

Published 01 May 2009

HD Camera Measurements and getting the most out of your c...

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Recap Parts1 and 2:Parts 1 and 2 covered the theory and actual measurement of white shading, making sure that the camera non-linearities introduced by various different lens systems on a particular camera are compensated. In this issue, Part 3 will investigate setting up colourimetry and exposure as well greyscale adjustments using a waveform monit...

Submitted by Dennis Lennie

Published 01 May 2009

HD Camera Measurements Getting the most out of your camer...

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Recap Part 1:In part 1 of this knowledge series we discussed the requirements for making correct white shading measurements in terms of the equipment used. Part 2 now will focus on performing the actual measurements and making sure that we achieve optimum linearity and dynamic range. White shading measurementPower up the camera, waveform monitor an...

Submitted by Dennis Lennie

Published 01 April 2009

HD Camera Measurements and getting the most out of your c...

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IntroductionImage quality all starts with the correct alignment of the camera which is used to capture the scene either on location or in the studio. The conversion of light into electrical signals involves many processes which can affect the quality of the image. Understanding these various adjustments that are necessary, using a suitable camera c...

Submitted by Dennis Lennie

Published 01 March 2009