Monday, November 14

Camera Alignment

In the bad old days of tube cameras, line-up was a daily (or more frequent) requirement. The camera tubes were thermionic devices which drifted constantly, as did the analogue circuitry that controlled them. So, we had to look after beam current, beam focus, raster geometry, registration, all before even starting on the camera chain controls. These front end alignments had to be carried out by a highly skilled Engineer. They were not operational tweaks. The same Engineer would then proceed to set up the subsequent chain, adjusting blanking, flares, shading, blacks, gains, gammas, linear matrix, clippers, knees, contours, thresholds, coring and more. When solid state image sensors appeared and matured, the front end alignments no longer applied. There was no scanning beam and the devices, being physical, had fixed geometry. In practice, they were instruments for measuring the aberrations of the lens. Also the digital camera chains were far more stable than their analogue predecessors. The net effect of these improvements was to reduce Engineering intervention. Unfortunately, in some cases intervention has been reduced almost to zero. It is unfortunate because to get good matching pictures from modern cameras there are still a few controls that have to be optimised regularly. Let's see. These include: flares, shading, blacks, gains, gammas, linear matrix, clippers, knees, contours, thresholds, coring and more. Familiar list? Plus ├ža change...

Thursday, March 3

Recent Activity

It's in the nature of Consultancies that an element of secrecy is often attached to what they do. So, while I can say that we have recently been involved in two new start-up TV Channels in the Gulf region, I can't yet divulge where they are or when they will launch.
One I can talk about is PIK TV, a Russian language channel broadcasting from Tbilisi, Georgia, which launched on Jan 25, 2011. In a mere ten days of consultancy, TriMedia developed the generic system design for the channel, proposed alternative solutions, and helped bring together the team of system integrators and key suppliers who were able to carry the project through to completion and launch, all in four months.
The key is to provide the best consultant for each situation. Our organisation, as a loose network of associates, helps us do exactly that.