tips

Calibrating monitors for HLG-1.2 High Dynamic Range working

We’ve now done a couple of Sony BVM-X300 (4k/HDR OLED panel) monitors for HDR-TV deliverables to the BBC. The Beeb are behind the Hybrid Log Gamma standard, currently at 1.2 for broadcast. It’s benefits over Dolby’s 10-bit version of their Vision HDR system (also called DolbyPQ) are many and rather splendidly the DVB as well [...]

By | 2017-04-13T08:29:42+00:00 March 14th, 2017|Categories: Broadcast Engineering, tips|Tags: , , |0 Comments

BM UHD/4k converters – some gotchas

https://www.blackmagicdesign.com/products/miniconverters/techspecs/W-CONM-17 I've used a few of these guys recently - Blackmagic's quad HD/SDi input to HDMI 2.0 output for taking the UHD / 4k (either tile or 2SI standard) and making something that will display on a 4k domestic TV. They seem to work quite well, but here are a few things that I had [...]

By | 2016-10-29T08:54:39+00:00 May 12th, 2016|Categories: Broadcast Engineering, Products, tips|Tags: , , |0 Comments

So what should you do about Quicktime on windows?

Earlier this week a story broke from Trend Micro  (echoed by America’s department of homeland security) about a current security risk in Quicktime,  advising that due to compromises, users uninstall the product from their machines as soon as possible. A lot of doubt and uncertainty has been sown around this announcement, lets take a look [...]

By | 2016-10-29T08:54:39+00:00 April 21st, 2016|Categories: News, root6, Support, tips|Tags: , |0 Comments

A review of Colour Reproduction in Electronic Imaging Systems: Photography, Television, Cinematography by Michael S. Tooms

All of my colourimetry comes from doing it; my theoretical knowledge isn't that great as I didn't study it at university and the colour training at the Beeb, although entirely appropriate to what a TV engineer needs was just that; TV-centric. Over the last ten years I would credit the following industry colleagues for widening [...]

By | 2016-10-29T08:54:41+00:00 April 5th, 2016|Categories: Broadcast Engineering, tips, Training|Tags: |0 Comments

Shooting and editing HDR via Avid using CLog gamma

We've got BVE2016 coming up and one of the things root6 will be showing is an HDR workflow via Media Composer using Canon monitors. HDR is still a bit of a crap-shoot as far as standardisation is concerned with the BBC/NHK system, Dolby Vision, Sony's SLog3 and Canon's camera-native CLog. The principle of using an [...]

By | 2016-10-29T08:54:42+00:00 February 12th, 2016|Categories: Broadcast Engineering, Products, tips|Tags: , , , |0 Comments

Audio over cat6a cable?

My podcast-partner in crime, the mighty Hugh Waters asked me how often I run audio signals over twisted-pair data cable in media facility builds. Has has a customer who is eager to do it this way. I’ve done it a few times and it’s fine with a few considerations. Earthing is still important and since [...]

By | 2016-10-29T08:54:42+00:00 February 8th, 2016|Categories: Broadcast Engineering, tips|Tags: |0 Comments

Gotchas with updating firmware over RS232

I've recently been upgrading Boland BVB25 OLED monitors over their RS232 serial ports; aside from needing a USB/serial adaptor (I use the Keyspan which mimics an old PC serial UART) you also need a null-modem cable (i.e. where Tx and Rx are swapped over). You can tell if a null-modem cable is required by the [...]

By | 2016-10-29T08:54:42+00:00 January 11th, 2016|Categories: Broadcast Engineering, Podcasts, tips|Tags: , , |0 Comments

Typical edit suite monitor calibration; some traps for young players

I spent the morning in a very typical Soho edit room with a JVC DT-V24-series LED-backlit LCD as the "front of house" monitor and an LG LED-backlit LCD as the client display. It's quite easy to get the JVC looking right - BBC style 6504k for Rec.709; I've waffled on about this a lot in [...]

By | 2016-10-29T08:54:45+00:00 August 7th, 2015|Categories: Broadcast Engineering, Support, tips|Tags: , |0 Comments

Backup versus archive

Knowing the difference and understanding what to do about it Although the transition from analogue to digital has been going on for nearly twenty five years, many users are still unclear as to what the difference is between the concept of a backup and an archive. In a nutshell, a backup relates to current information in use that is [...]

By | 2016-10-29T08:54:51+00:00 March 11th, 2015|Categories: Opinion, Support, tips|Tags: , , |0 Comments

Storage Explained

Local Storage/Direct Attached Storage Typically this is defined as storage with no ability to provide any real-time sharing capability. Most common is the FireWire,  USB 3.0 or ThunderBolt drive, used for moving media from a shoot for example, but local storage is also used when bandwidth demands become too costly an option for shared online storage. Shared storage can be [...]

By | 2016-10-29T08:54:51+00:00 March 11th, 2015|Categories: Support, tips|Tags: , , , , , |0 Comments

Why do manufactuers over-specify power requirements for broadcast equipment?

It's actually a rhetorical question and I'm glad they do. Most of the time I have to tell a customers' electrician and air-con contractor how much power (and hence how much heat) the machine room will be pulling/genarating. Most customers refuse to believe that 99.9% of the electrical power entering a server room/TV MCR leaves [...]

By | 2016-10-29T08:54:53+00:00 January 12th, 2015|Categories: Broadcast Engineering, tips|Tags: , |0 Comments

What’s the best setting for Gamma with Rec.709 video?

 I've been calibrating TV displays for around twenty-five years and have always leaned on the BBC practice of setting peak white at 80Cd/m2 and the white point at 6504k. For all the decades of standard definition work a gamma of 2.2 has been used. This is required because television cameras don't have a linear transfer [...]

By | 2016-10-29T08:54:55+00:00 November 19th, 2014|Categories: Broadcast Engineering, tips|Tags: , , |2 Comments

Perceptual video quality and compression – PSNR measurements

Compression is a fact of life, there have only been two production VTRs that stored uncompressed video – D1 and D5; they are no longer used because they were both SD (and D1 was only eight-bit video). So, the vast majority of the material we handle is compressed and so there should be a way [...]

By | 2016-10-29T08:54:55+00:00 November 19th, 2014|Categories: Broadcast Engineering, Opinion, tips|Tags: , , , |0 Comments

Measuring fibre cabling and the problem of encircled flux loss

  Last week I went on a very interesting training day courtesy of Nexans – data cable & parts supplier. I went looking forward to learning all about the new standards surrounding catagory-8 cabling for 40 and 56 Gigabit ethernet (a massive 1600Mhz of bandwidth down a twisted pair cable!) and the new GG45 connector; [...]

By | 2016-10-29T08:55:00+00:00 July 21st, 2014|Categories: Broadcast Engineering, tips|Tags: , , |0 Comments

Sony XDCAM, HDCAM, and F65 RAW AMA Plug-ins Updated for Media Composer | Software (v8.0)

Sony has just released updated versions of their XDCAM, HDCAM, and F65 RAW AMA plug-ins, which introduced installation compatibility with Media Composer | Software (v8.0).  Previous versions of the Sony AMA plug-ins would work with Media Composer | Software (v8.0) but were only accessible by installing on Media Composer 7.0.x and then upgrading to Media [...]

By | 2014-07-14T20:55:00+00:00 July 14th, 2014|Categories: Support, tips|Tags: , , , , , |0 Comments

Panasonic P2 Plug-ins Updated to Include Mac OS X Support for Media Composer v7.0.4

Panasonic has just released an updated version of their P2 AMA Plug-in for use with Avid Media Composer v7.0.4.  The v4.2 plug-in adds support for Mac OS X installations of Media Composer and is compatible with Windows installations of Media Composer as well.  The previous 4.1 version, which added support for various AVC-LongG operations, was [...]

By | 2014-07-14T20:52:00+00:00 July 14th, 2014|Categories: Support, tips|Tags: , , , , |0 Comments

Blackmagic VideoHub software and QLogic fibre cards under MS Windows in SANs

Here's something from the dim recesses of my brain that I'd just remembered. Blackmagic VideoHub routers take all their network traffic over port 9990; which is also used in some QLogic/SAN configurations for metadata traffic. They don't play nice with each other. To fix this set the BM Software (whilst USB-connected to the hub) to [...]

By | 2016-10-29T08:55:11+00:00 April 10th, 2014|Categories: Broadcast Engineering, Support, tips|Tags: , , |0 Comments

Amulet – they fixed OS-X's Temporal Dithering issue

As mentioned in a previous post temporal dithering on OS-X has proved troublesome with Amulet (and in fact it bedevils all KVM-over-IP systems). The guys at Amulet have written a Kernel Extension that stops the card turning on temporal dithering. James, their engineer, explained to me that it's a different technique between nVidia and Radeon, [...]

By | 2016-10-29T08:55:15+00:00 January 29th, 2014|Categories: Broadcast Engineering, tips|Tags: , |1 Comment

Multicast addresses in IP

I thought I knew TCP & UDP/IP but I was reminded this week about the 224.0.0.0/4 multicast subnet. If you're ever in a position where you need to identify a device's IP address (even on a different subnet, but the same LAN segment) you can PING 224.0.0.1 and everything on the segment will respond to [...]

By | 2016-10-29T08:55:15+00:00 January 29th, 2014|Categories: tips|Tags: , |0 Comments

UPnP – It was always a bad idea!

UPnP is a protocol that allows a router to listen out for requests to open ports and to make other configurations changes from a client machine WITHIN the LAN. It was popularized a decade ago by Microsoft with the original XBox. If you want to have a game that you're playing with others (who are [...]

By | 2016-10-29T08:55:16+00:00 January 29th, 2014|Categories: tips|Tags: , |0 Comments

PING goes further than you think

Do you ever need a quick and free method of testing the reliable uptime of a network server? There are lots of paid for bits of software and onine services but if you have a spare Windows box this little DOS command (which you can save as a .BAT file for quick deployment) does a [...]

By | 2016-10-29T08:55:17+00:00 January 29th, 2014|Categories: tips|Tags: , |0 Comments

3G SDi parts becoming commodity?

My pals at Lindy (who I buy lots of computer connectivity parts from) sent me a bunch of engineering samples of 3G-capable SDi parts; DAs, fibre transceivers etc. from one of their OEM manufacturers in the Far East. For very modestly priced pieces they were excellent. The eye-pattern (above) is the output of their re-clocking [...]

By | 2016-10-29T08:55:16+00:00 January 29th, 2014|Categories: Broadcast Engineering, tips|Tags: , , |0 Comments

EDID isn't the only thing that graphics cards look at

Avid Media Composer insists on re-starting when it sees a change of monitor. I always assumed that it was done via Windows detecting a new EDID profile but it turns out that if you unplug and re-plug the same monitor (i.e. EXACTLY the same EDID data - even s/n) then the same happens and so [...]

By | 2016-10-29T08:55:16+00:00 January 29th, 2014|Categories: Broadcast Engineering, tips|Tags: , , |0 Comments

Colour perception – a couple of notes

  Colour perception is a complicated business; most people have tristimulus vision - that is we perceive colour (broadly speaking) in reds, greens and blues. Your brain does the clever stuff of filling in the intermediate colours - if you're seeing a colour between red and green (yellow) the mix of stimulation of the red [...]

By | 2016-10-29T08:55:16+00:00 January 29th, 2014|Categories: Broadcast Engineering, tips|Tags: , , |0 Comments

AES audio on D-25 connectors

I've been working at a facility that delivers DCP masters to cinemas and the thing that we had to pay lots of attention to is the pinouts for various multi-channel audio servers and monitoring boxes, principally; Dolby 650 & 750 surround processors - the gadgets that "tame" a room to make it sound like a [...]

By | 2016-10-29T08:55:17+00:00 January 29th, 2014|Categories: Broadcast Engineering, tips|Tags: , , , |0 Comments

Avid Attic Change (for the better)

The number of bins that are kept in the Attic has always been a bit of a bear trap for the unwary editor. You used to have to do a bit of maths to be sure that, based on the number of bins open in a project, that you had set it right and that [...]

By | 2014-01-13T07:59:00+00:00 January 13th, 2014|Categories: Support, tips|Tags: , |0 Comments

Chassis vs Signal earth on RS422 remotes

Grounding is essential to reliable operation of any RS422 connections. It is also the most overlooked and least understood. The easiest way to ground your RS422 equipment is to simply use “Earth” ground as your return path. Although easy this may not be the best method for grounding your application, because current leaking from equipment, [...]

By | 2016-10-29T08:55:18+00:00 January 10th, 2014|Categories: Broadcast Engineering, tips|Tags: , , |0 Comments