Problems and solutions in audio


Mike Law# TV-Bay Magazine
Read ezine online
by Mike Law
Issue 89 - May 2014

BCD Audio is a UK manufacturing and design company specialising in audio products for the global broadcast and professional market. Mike Law is company managing director and also head of design. He is a member of the IET and the AES. He presents here several case studies to illustrate how the company has been able to offer solutions to customer problems or requirements.

SDI SD/HD audio monitor:

A well known news company required an audio monitor for their Singapore office to include audio monitoring of SDI SD/HD feeds. The existing BCD AMU (audio monitoring unit) used a single channel SDI module, so a quick discussion around the office and we decided we could create a dual channel module in a short timescale. The eight way audio selector now chooses between two SDI feeds, defaulting back to AES3 and analogue sources when required.

MADI Switcher:

PCs are used these days on stage as a multichannel playout audio system, and it is useful to use two PCs so that if one crashes the other can take over the feed. A sound rental company in Wales came to us with this requirement, and the best solution was to take two Digico USB to MADI modules and create a 2:1 MADI switcher in house. We were able to take dual redundant power from the additional USB to MIDI units they required, eliminating a local power supply, and we managed to package it all into a neat 1U case.

Microphone amplifier:

A customer was having problems with camera talkback; the talkback feeds were of low level and had to travel unbalanced over many metres to reach the intended destination. We supplied our BCD ALT-1 mic amplifier module to be applied as a quick fix, and when it was clear it had solved the problem they then rolled it out to all cameras. The ALT-1 continues to find niche applications for a local foolproof, reliable mic amplifier. It is suitable for use in a broadcasting news room, and can be used in fully digital installations when coupled to the BCD -ATOD1. Two ALT-1 units can be used with one ATOD unit, where both channels will appear in the main broadcast matrix.

Installer rack units:

The world might be changing to Network and Cloud architectures, but there is always a need for a solid reliable AES3 and Analogue distribution system in a radio or TV installation. A well known radio media company needed to distribute over a hundred signals around their London CTA (central traffic area), and the BCD solution was the Installer-48 rack system. Each of the three racks will contain up to 48 three output AES3 or analogue DA Piglets, (small modular circuit boards) mounted onto modular Eurocards, with dual PSUs for redundancy. These racks are also in use in New Broadcasting House with BCDs GPI interface cards and the BCD Presenter Audio Monitor (PAM) system, and will shortly be used in the refurbishment of Millbank.

Established 25 years ago to provide high quality audio systems for radio and television broadcasting, BCD Audios in-house skills were immediately sought after by prestige clients including the BBC and ITV companies. Today, BCD Audios designs are heard and seen all over the world, keeping broadcasters on air 24/7.

The product range has grown from pure analogue engineering to fully embrace todays digital world, from standalone black box problem solvers, to dedicated rack mount units and full Eurocard infrastructure systems. BCD Audio can also deliver bespoke audio solutions to a clients exacting requirements.

At the forefront of technological advances, BCD designers use the latest digital systems, often implemented with FPGAs or processors with network control.
BCD solutions now often involve video too, and the in house design skills include the processing of SD/HD video, with a bias towards audio embedding, de-embedding and DSP.

In-house manufacturing has also evolved; BCD have their own surface-mount assembly plant, and are capable of producing units in-house with fine-pitch components on multi-layer boards.

Recent projects include an automatic audio-triggered webcast system for the UK Parliament, which has evolved into a radio station webcast system, a 1U HD video capable audio mixer, and a fully digital audio monitor unit. BCD Audio rack- based systems have been specified in recent OB truck, radio station and TV studio presenter audio monitoring designs.

Mike Law concludes We welcome enquiries from broadcast and installation companies, and if the solution is not already on the shelf, we will be happy to design and build it!

www.bcd-audio.co.uk


Tags: iss089 | BCD Audio | SDI SD/HD audio monitor | MADI Switcher | Microphone amplifier | Installer rack units | Mike Law#
Contributing Author Mike Law#

Read this article in the tv-bay digital magazine
Article Copyright tv-bay limited. All trademarks recognised.
Reproduction of the content strictly prohibited without written consent.

Articles
NAB Intelligence
Bruce Devlin - new It's that time of year again. 06:30 on road bikes on the Las Vegas Strip with a merry bunch of folks who believe they look good in lycra. As we pedal West up the hill towards Red Rock there will be stories of the year just gone and questions about what to look for at the show. I, for one, will be attending the Devoncroft event to check up on who is spending what and where. I will then look forward to the topics that might be buzzing around the halls. I predict there will be many displays of Machine Learning hiding under the banner of Artificial Intelligence. Some of these will show better picture quality, others will show personalisation engines, some will be improved search tools and yet more will be synthesising pictures and motions to replace reality with and Artificial reality that's more compelling for the viewer.
Tags: iss136 | nab | class | ai | smpte | st2110 | imf | Bruce Devlin - new
Contributing Author Bruce Devlin - new Click to read or download PDF
Streaming - Shut up and Sit Down
Matt Lees Twilight Imperium is a board game all about strategy and backstabbing. Known for its length of gameplay, the team behind Shut Up and Sit Down decided to deliver a mammoth 10-hour live broadcast, streamed to Twitch. Matt Lees is here to tell us how it went down.
Tags: iss136 | streaming | blackmagic | atem | 4k | canon c100 | sony pxw-z90 | Matt Lees
Contributing Author Matt Lees Click to read or download PDF
TV Futures - The Shadowing Experience
Daniel Jones My name is Daniel Jones, and it is no accident that I’m currently studying BSc (Hons) Television and Broadcasting at the University of Portsmouth. Since completing GSCE media studies I have been constantly questioning what I watch with questions such as, “Wow, how was that filmed?” or “That looks amazing, I wonder how long that took?” It should come as no surprise that I made it a big focus of mine to get myself some real work experience to give myself some answers to these production questions.
Tags: iss136 | portsmouth university | runner | student | education | training | Daniel Jones
Contributing Author Daniel Jones Click to read or download PDF
Living LIVE at BVE with Ross Video
Jon Pratchett KitPlus’ Jon Pratchett chats to Stuart Russell, Ross Video, in the BVE studio. Covering customer partnerships and loyalty, pain points, growth, industry trends, pace of IP adoption, 12g SDI technologies, UHD / HDR, 8k, AI and we try to get a hint of new products on the horizon...
Tags: iss136 | ross video | 12g sdi | uhd | hdr | ip | bve 2019 | bvexpo | Jon Pratchett
Contributing Author Jon Pratchett Click to read or download PDF
Preserving the British Film Institute Archive
David Feller Today, the media and entertainment industry faces numerous challenges. To remain successful and competitive, these organisations must be ever innovative, agile and cost efficient in the way they produce, store, manage and distribute their digital assets. Content creators have traditionally relied upon outdated storage models, comprised of legacy interfaces, file structures and historical proprietary storage management software that tend to be complex, cumbersome and expensive. This makes it difficult to forecast and budget for ever-growing content in the effort to reach viewers.
Tags: iss136 | bfi | archive | blackpearl | spectra | storage | film | tape | David Feller
Contributing Author David Feller Click to read or download PDF