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Filtered Tag: waveform (9 results)

Managing Technological Change

Continual technological change in the broadcast and media industries can make it difficult to plan for the mid to long term. Typically, broadcasters and media organisation are still implementing the last set of changes to working practices when the next changes come along. Display manufacturers and viewer expectation help drive the different techno...

Submitted by Alan Wheable

Published 08 September 2018

Waveform Monitors in 4K Production

by Alan Wheable Issue 112-April 2016 Waveforms have always been one of the essential tools for anyone working in the video industry and are used for level alignment, grading and quality control to touch on just a few areas. Working with HD and 3G-SDI waveform technology may have been a solution in the early days of UHD/4k to display the waveforms f...

Submitted by Alan Wheable

Published 25 April 2016

How to read Video Scopes

by Larry Jordan Issue 98 - February 2015 Understanding what video scopes tell us about our images is essential to creating great looking images; regardless of which video editing software you are using. In this article, I want to explain the basics of video scopes and how to read them. A QUICK BACKGROUNDEach video image is composed of pixels, small...

Submitted by Larry Jordan#

Published 01 March 2015

Why test and measurement is for real life, not just for e...

by Will StraussIssue 79 - July 2013 Thanks to its long-standing association with virtually incomprehensible acronyms, dark machine rooms and (lets face it) engineers with unruly beards, the subject of Test and Measurement (T&M) always gets a bit of bum rap. Yet, for all the pre-conceptions, it is a hugely important part of the production and broadc...

Submitted by Will Strauss#

Published 01 August 2013

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

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

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

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

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

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...

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