KitPlus | Articles

Is 4K the end of the line?

In my TV-Bay April 2013 article I mused over the familiar BNC connector and was it at the end of its line as far as broadcast interconnections were concerned. It’s been around a long time, the BNC was invented in the late 1940s primarily for military radio frequency and microwave interconnections but then became the standard for baseband video conn...

Submitted by Robin Palmer

Published 01 July 2013

Audio phase: Robin Palmer asks why it is wobbly?

Phase meters and audio vectorscopes are to be found on most test kit involved with audio monitoring. This is important because left/right audio correlation problems between the channels will distort the stereo ‘image’ and could degrade mono compatibility. If left and right phase should ever be inverted, any centered identical audio would be cancell...

Submitted by Robin Palmer

Published 01 June 2013

BNC: Is it at the end of the line?

by Robin PalmerThe familiar BNC connector has been around a long time. It was invented in the late 1940s, primarily for military radio frequency and microwave interconnections. The initials derive from the style plus the names of the inventors (Paul Neill and Carl Concelman): Bayonet Neill–Concelman. The original development work was done by Octavi...

Submitted by Robin Palmer

Published 01 May 2013

What you see is what you get? Doubtful!

by Robin PalmerThe colour you see is not necessarily the same colour experienced by someone else looking at the same thing. It all depends on the viewer and the viewing conditions as well as the actual colour of the thing. In some professions having perfect colour vision is a matter of safety as in the case of airline pilots and those in railway si...

Submitted by Robin Palmer

Published 01 March 2013

Robin Palmer and why flashy programmes are not so good?

by Robin PalmerEver since the 1997 Pokmon phenomenon when hundreds of Japanese children were struck with epileptic fits provoked by a series bright red flashes in a TV cartoon programme broadcasters have become only too aware of PSE. Photo-Sensitive Epilepsy is a rare condition affecting perhaps only 1 in 4,000 people where flashing lights or image...

Submitted by Robin Palmer

Published 01 February 2013

Meeting standards in 3D

It has been said that poor quality stereoscopic TV will ‘poison the water’ for everyone. This was because in the past 3D was made to quite poor and uncontrolled production and delivery standards. But since BSkyB’s “Technical Guidelines for Plano Stereoscopic 3D Programme Content” were published over two years ago programme makers have had specific...

Submitted by Bob Pank#

Published 01 January 2013

The highs and lows of histograms

Histogram displays for video analysis probably followed those found in common computer graphics programs such as Adobe Photoshop. This can be very useful in finding video signal problems that would be difficult or impossible to see with a conventional waveform display. The histogram is a way of showing statistical results as a bar-chart. The range...

Submitted by Kieron Seth#

Published 01 December 2012

Wibbly Wobbly Waveforms

The very first analytical electronic instrument, developed in the late 1890s, was the oscilloscope. This used a cathode ray tube (CRT) to paint a graph of voltage on the Y axis versus time on the X axis. Once television became a practical reality in the 1930s, the same instrument was applied to the video output from the camera and became the very u...

Submitted by Bob Pank#

Published 01 November 2012

Pointing out the right colours

In the old days of PAL and NTSC analogue television, a vectorscope was an essential tool for examining chroma at every part for the programme production and transmission chain. This was because the colour information was carried as a phase and amplitude modulation which could be sensitive to a variety of transmission or recording non-linearities an...

Submitted by Bob Pank#

Published 01 October 2012

Watch out for dead pixels

A dead pixel in a camera imaging sensor can manifest itself in a number of ways. Implying black, 'dead' is not necessarily the correct term for a pixel failure. This is because imager defects include hot pixels, sparkles, noisy or lazy pixels. These problems usually arise during the chip manufacturing process. Defective pixels can appear as unusual...

Submitted by Bob Pank#

Published 01 September 2012

Testing times of a 4K world

The term '4K' applies to some five slightly different picture formats with around 4,000 pixel horizontal resolution: all much bigger than HD. In fact roughly four times the total pixels required for 1920 x 1080 pixel high definition. 4K has been around for some years but was until recently only affordable by producers with mega budgets. Advances in...

Submitted by Will Strauss#

Published 01 August 2012

Gamut errors: Who cares?

Gamut errors are the most common video signal problems. This is because colour television or cinematography depends on being able to represent every pixel on the screen in terms of red, green and blue. We want to deliver perfect RGB signals representing all the possible colours in our pictures. Virtually all display technologies use RGB primary col...

Submitted by Bob Pank#

Published 01 June 2012

Are you out on the range

The main parameters to worry about in any stereoscopic scene are the most negative and positive disparity values. These numbers are usually expressed in percentage terms rather than in actual screen pixels. The distance between the numbers is the depth range. The depth budget is the maximum value this range can be allowed without being too uncomfor...

Submitted by Will Strauss#

Published 01 May 2012

Light weight 3D side-by-side production

Whenever you see a typical publicity picture of a 3D production shoot, it invariably includes a very bulky and expensive-looking mirror rig. This can look daunting for the new initiate coming into 3D production and is not the sort of kit you might not want to risk using outdoors. The mirror rig arrangement allows two (usually large) cameras to be p...

Submitted by Bob Pank#

Published 01 April 2012

BVE 2012 in no particular order.......

The big story at BVE 2012 was BVE 2013. With the Earls Court exhibition site scheduled for redevelopment, BVE relocates next year to the ExCel exhibition site in London’s Docklands. The distance is only about 10 miles but, in the minds of many BVE exhibitors, the move is comparable with moving the NAB Convention to the Mississippi Delta. If you rea...

Submitted by Bob Pank#

Published 01 April 2012