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

Before we can go on to look at testing IPTV systems, it would be useful to provide an overview of the technologies involved. Network ArchitecturesFigure 3 shows an example of a typical IP network structure. Content is first delivered into the video headend; this can be done in a variety of formats over a number of different delivery mechanisms (e.g...

Submitted by Dennis Lennie

Published 01 October 2009

Automation in Uncertain Times

In light of the unfavourable economic outlook broadcasters need to protect their investment in technology like never before. There is a high chance that some products designed to make the broadcast environment more efficient will become obsolete and this in turn will have a knock-on and negative effect on workflow in transmission suite. Although br...

Submitted by Dennis Lennie

Published 01 September 2009

Converting for displays

Behind every great display there’s a great converter. Ever since television started to go digital in studios and post production, the number of digital formats has grown. For a while the television standards bodies got a grip and succeeded in pulling nearly everyone along the ‘SDI’ track; now itself expanded to HD-SDI and 3G-SDI – carrying a multit...

Submitted by Dennis Lennie

Published 01 September 2009

Ask the experts. Eye & Jitter

Why should TV broadcast engineers be interested in adding Eye and Jitter measurement to their T & M facilities?The call for Eye and Jitter as part of overall video test and measurement lies in the widespread adoption of serial digital interface (SDI) standards for broadcast. Unlike analog transmission in which the image quality gradually degrades a...

Submitted by Dennis Lennie

Published 01 September 2009

Eye to eye Picture displays and multiviewers 2009

The transition from cathode-ray tubes to flat-panel display devices for broadcast picture monitoring was a long time coming but is now almost complete. Grade 1 CRTs from suppliers such as Ikegami and Sony are still purchased in small numbers for monitoring in quality-conscious playout centres and post-production houses. For every other broadcast ap...

Submitted by Dennis Lennie

Published 01 September 2009

Diversify - the key to success

Most business could survive the recession if they adapt what they do, or how they do it, explains Peter SavageIn the current economic climate, with the market shrinking, every business has to look at ways of growing or developing – if they are to survive. And sometimes you have to think outside the box. There is, as they say, only so much blood you...

Submitted by Dennis Lennie

Published 01 September 2009

Ancillary Data Monitoring in Multiviewers

The broadcast environment has gone through enormous change over the last decade, creating challenges in the management, storage and broadcast of material. Factors contributing to these challenges include the increase in the number of channels with the move to digital, the introduction of various aspect ratio and video standards with the transition...

Submitted by Dennis Lennie

Published 01 September 2009

Top Gear Test Drive Hovercam

Hovercam were contacted to work on some new ideas for Top Gear back in January 2009. The production team were keen on trying new ideas to put a different perspective on the cars that are tested for performance around their test track at Dunsfold, Surrey. Typically the program has featured two-dimensional imagery of super cars, so the idea was to br...

Submitted by Dennis Lennie

Published 01 September 2009

How to choose a broadcast display

How to choose a broadcast display…10 years ago, buying a CRT monitor was simply a case of buying the latest version of your facilities favourite brand in either Grade I or II. The advent of the LCD, HD and the demise of the CRT means we have now to try and decipher all the marketing jargon to work out which display best fits our needs. To help de-m...

Submitted by Dennis Lennie

Published 01 September 2009

Tv-bay Digital Signage Special Report IBC2009

Sign of the times at IBCDigital signage – the use of video screens or projectors to create dynamic information and advertising displays – has moved on rapidly from technological showcase and niche market to become a mainstream media. Recent research by Multimedia Intelligence predicts a doubling of the market by 2012, with 2.3 million displays in u...

Submitted by Dennis Lennie

Published 01 September 2009

Guide to Testing IPTV Technologies and Challenges Part 2

In Part 1 of this series we gave a background to IPTV and explained that the two-way nature of IPTV networks offers many advantages over traditional broadcast technologies, but also presents a number of technical challenges. In this part we will begin to examine some of the challenges faced by IPTV service providers, and the importance of Quality o...

Submitted by Dennis Lennie

Published 01 September 2009

Modern multiviewers

The monitoring of multiple video sources has been simplified and costs greatly reduced by the use of multiviewers. These make use of two principle technologies: large high-resolution video screens and the real-time resizing of video. The market is now well developed and provides a wide choice of specifications such as the number of inputs and their...

Submitted by Dennis Lennie

Published 01 September 2009

OLED vs LCD

There was a rapid change in image display technology within the last few years. Nowadays CRTs are history, flatpanels substitute them everywhere. Even in the broadcast industry. Different technologies dominate the market;Plasma - a self-lighting principle - mostly used for large screens;TFT-LCDs - a concept that always needs a backlight - most comm...

Submitted by Dennis Lennie

Published 01 September 2009

Filming for the army on Salisbury Plain

The ApproachIt’s no secret. Soldiers are trained to feel invincible, They develop a whole persona around focussed “toughness” and the ability to take care of themselves. But nobody is tough enough to withstand being crushed between a 70 tonne Warrior and a Land Rover. The problem is how to explain this to men who as a day job, get shot at. That was...

Submitted by Dennis Lennie

Published 01 September 2009

Why choose a broadcast or professional monitor

Just as it’s unlikely that anyone would purchase a family vehicle to set trailblazing records around a race track and a sports car is not going to be the best choice for off-road use, the same principle is true of monitors – the key is to match the product to the demands of the task. So what are the differences between the major monitor families?Co...

Submitted by Dennis Lennie

Published 01 September 2009