Broadcast News

Bookmark and Share

Comrex Earshot-IFB Heralds A New Era In Remote IFB For Live Radio And Television

News Image
Interruptible Foldback (IFB) – aka Switched Talkback – is a one-way monitoring and cueing system used in television, filmmaking, video production and radio broadcast for communication from the studio director to on-air talent at a remote location. IFB is often facilitated using an earpiece that the on-air talent wears to get cues, instructions and direction from the studio or control room.

The entire setup uses an intercom buss that consists of a mix-minus or clean-feed of programme audio that can be interrupted or switched to be replaced by a talkback feed that overrides the normal clean-feed. On a television news programme for example, a producer can talk to the news anchors to tell them when they are live on the air and when to begin reading off the script on the teleprompter or cue cards. In live television, some news anchors are seen listening to IFBs through their earpieces in order to report breaking news and announcements.

Traditionally, IFB is sent to the remote site using normal PSTN Telephone Lines but by the very nature of PSTN, one telephone line is needed for each and every simultaneous IFB connection which has resulted in banks of legacy POTS lines (Plain Old Telephone System) being kept just to cue remote talent. The call may well connect remotely via a mobile connection with a Bluetooth interface such as BluePack or BlueKeeper, often used in OB Vehicles for talkback and IFB which is then distributed to the remote crew using wireless earpieces.

This is where Earshot-IFB comes in;  instead of using multiple PSTN lines for IFB, Earshot is a VoIP audio bridge to which up to 30 simultaneous users can connect bringing the power of VoIP (Voice-over-IP) to IFB technology, resulting in high-quality audio and significant savings in cost.

Comrex EarShot-IFB is a hardware-based system that delivers live audio feeds to callers. It is designed to provide telephone-based live studio programme and IFB audio to field-based remote broadcasts, ideal for Sports and TV ENG reporters making it possible to replace up to 30 POTS lines with one simple box.

EarShot has four audio inputs (or feeds) two of which can be configured for IFB.  Up to 30 callers can dial in and listen to audio from standard telephones (including Mobiles) and switch between the feeds using DTMF (Touch Tone) selection. Some feeds typically carry full programme audio with Clean-Feed / Mix-Minus on other Inputs to prevent echo and other audio flaws. This versatility makes it simple to tailor EarShot-IFB to individual needs.

EarShot interfaces to VoIP telephone circuits using SIP and can connect using cloud-based VoIP providers, VoIP-based PBXs (usually) or hardware VoIP/PSTN gateways. It can handle up to 30 POTS or 10 wideband calls and users can configure the box to handle a combination of each.  Subscribers use a normal ’phone to connect or the FieldTap application, CallMe Click-and-Connect or the hardware CallMe-T codec - to provide higher quality audio and additional flexibility.

For more information or to arrange a demonstration, Vortex distributes Comrex Codecs, Talk Show Systems and Telephone Interfaces – including Earshot.

This article is also available to read at BFV Online

Top Related Stories
Click here for the latest broadcast news stories.

EVS Unveils New Licensing Model For Its XT-VIA Live Production Server
EVS has unveiled a new licensing model for its flagship XT-VIA live production server, setting new standards for flexibility, accessibility, and user
What Is The Future For Immersive Audio?
Peter Poers, Managing Director at Jünger Audio, looks at production efforts versus consumer experience. Introduction Along with the evolution of highe
DHD audio Unveils XS3 Core Audio Processor
DHD audio has announced a new addition to its modular range of audio studio equipment and systems. The XS3 core audio processor supports up to 20 ster
Visom Digital Supplying Major Brazilian Broadcasters
Visom Digital, a production sales company with a studio division specializing in recording, mixing, post-production film with Foley, ADR, Dubbing, SFX
Comrex At NAB
Vortex's life-long partner in Remote Broadcast IP Audio and Video Codecs, Talk Show Systems and really useful stuff is exhibiting in the NAB Central H
Sonic introduces DVD-Audio Centre LE
Sonic Solutions have introduced the DVD-Audio Creator LE – a highly-affordable DVD-Audio authoring system with advanced features. Incorporating core t
A Viable Economic Alternative to AD...
Both Spoken Subtitling and Audio Description may be candidate services that could benefit from the application of Text-To-Speech technology, says John
Bridge Technologies Adds Dolby E Monitoring To VB440
Bridge Technologies is to demonstrate the enhanced audio functionalities that they have brought to their leading production probe, the VB440 at NAB 20
VORTEX To Showcase Latest Comrex Products At IBC 2018
VORTEX is exhibiting at IBC on Stand 12G11 in Hall 12 and will be showing the latest Comrex products being introduced for the first time in Europe. AC
Announcer's Console And IFB Interface Help CRAS Extend Broadcast Audio Training
Conservatory of Recording Arts and Sciences (CRAS), a leading audio recording, engineering and production school, recently invited select students to
Jünger Audio Helps Two US Broadcasters Comply With CALM
WBPH-TV and WMBC-TV choose Jünger Audio’s T*AP Television Audio Processor as their "one-box" Loudness Control solution Berlin, Germany: The implementa
Blackmagic Design Announces Major New Software Update
Blackmagic Design has announced a major new software update that adds full-audio mixing capability to its ATEM 1 M/E Production Switcher and ATEM Tele
Forever Audio Makes Use Of Cleanfeed's Remote Recording Software
Audio post production facility Forever Audio made good use of Cleanfeed's Emmy-Award winning remote recording software to capture the voices of actors
Parabolic Deploys Cleanfeed To Re-Record High Qulaity Audio
Audio post production facility Parabolic is using Emmy Award-winning Cleanfeed to re-record high quality audio, in real time, from anyone and from any
DHD TX2 Ultra-Compact Multitouch Audio Production Mixer To Debut At MPTS
The DHD TX2 ultra-compact multitouch audio production mixer will make its UK exhibition debut at the Media Production & Technology Show (MPTS), Olympi