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12 January 2025

SONIFEX RB-AEC ACOUSTIC ECHO CANCELLER Analogue and digital audio in, out, 1U

Stock code
95-7613
Brand
Sonifex
Model number
  • RB-AEC
SONIFEX RB-AEC ACOUSTIC ECHO CANCELLER Analogue and digital audio in, out, 1U
SONIFEX RB-AEC ACOUSTIC ECHO CANCELLER Analogue and digital audio in, out, 1USONIFEX RB-AEC ACOUSTIC ECHO CANCELLER Analogue and digital audio in, out, 1USONIFEX RB-AEC ACOUSTIC ECHO CANCELLER Analogue and digital audio in, out, 1U

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VAT / Delivery
$1,331.20
each (ex. VAT)
Ordered on demand, cancellations may incur charges, available in 4‑6 weeks. Need it sooner? Call us

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SONIFEX REDBOX AUDIO/VIDEO PROCESSORS

Sonifex Redboxes were introduced in 1999 and were designed for systems integrators. They are very well received in both Broadcast and studio industries. The series of signal processors that include headphone amplifiers, mix-minus generators, silence detectors, tone generators, distribution amplifiers, audio converters and more, are built in two different extrusions, with front and rear panels screwed to the extrusion.

ACOUSTIC ECHO CANCELLERS


RB-AEC - Acoustic Echo Canceller

RB-AEC is primarily designed for the benefit of studio personnel in television and radio. When a studio presenter's microphone signal is played out through a monitor speaker in the control room, it can be picked up by the control room microphone(s) and returned to the presenter's earpiece as an undesirable echo. This unit 'learns' the environment and can be used to remove the echo from the earpiece, using digital processing.

In circumstances where green-screen video processing is taking place, the delay can be greater than 200ms. Additionally, the dimensions, occupancy and distance between mouth and microphone can further influence the echo. The RB-AEC is used to remove the entire output of the control-room monitor-speaker from the presenter's feed, by adapting to the environment in which the control-room microphones are placed. Although acoustic echo cancellation is more commonly implemented in telephony systems, the Sonifex RB-AEC is designed to produce broadcast quality cancellation.

The post-processed transmission output program from the studio (A) is sent to the RB-AEC as an analogue or digital audio signal (the stereo input is auto-sensing) which 'acts as a mix-minus to the input signal (B) from the control room'. The RB-AEC removes the unwanted acoustic echoes so that the audio sent to the presenter's earpiece (C) is free of echoes and reflection artefacts.

The device may also be used during a 'phone-in' to remove delayed caller audio from the telephone line.

The unit can be controlled remotely over an Ethernet connection using the built-in web server. By default the unit is configured for dynamic addressing using DHCP and 'Auto-IP'. If a static IP address is required then this must be configured through the web server.

The device is packaged in the familiar Sonifex Redbox rack-mounting chassis, IU high. The front panel has an LED to indicate power.

The rear panel has two 3-pin, female, XLR connectors for the line level analogue or digital inputs for the 'far end' and 'near end'. Three 3-pin, male, XLR connectors provide analogue outputs one and two as well as the digital output. A bank of four miniature (DIL) switches adjust settings, a 9-pin, female, D-sub connector provides GPIO connections and an RJ45 connector is provided for Ethernet. Power is connected via an IEC inlet, with an adjacent fuse.

Audio inputs: +18dBu / 0dFS maximum, 20k ohms / 110 ohms with termination set, analogue / digital. Input gain: 0, +6, +12 or +18dB digital gain, switchable. Distortion: 0.02%, 1kHz, +8dBu output. Noise: -84dB RMS, unity gain, ref +8dBu output. Response: 20Hz-12kHz +0/-0.5dB. Rejection ratio: Typically 20dB input to output on complex waveforms, reference peak level of 0dB. Audio outputs: +18dBu / 0dFS maximum, 50 ohms / 110 ohms, analogue / digital. Output sample rates: 32kHz - 192kHz, selectable. Power source: 85-264V AC, 47-63Hz, 10W maximum. Dimensions (WxDxH): 480 x 108 x 42mm. Weight: 1.5kg.

Included accessories: Manual, AC power cable.
Optional accessories: RB-RK3 Rear rack panel kit.

AUDIO CONVERTERS - A/D & D/A

AUDIO CONVERTERS - UNBALANCED TO BALANCED/BALANCED TO UNBALANCED

AUDIO CONVERTERS - STEREO TO MONO

AUDIO EMBEDDERS AND DE-EMBEDDERS

CONTRIBUTION UNITS

DELAY SYNCHRONISERS

DIGITAL AUDIO DELAYS

DIGITAL VIDEO DISTRIBUTION AMPLIFIERS

DISTRIBUTION AMPLIFIERS

HEADPHONE AMPLIFIERS

ISOLATION UNITS

LIGHT SWITCHING UNITS

LIMITERS

MIX-MINUS GENERATORS

PREAMPLIFIERS

PROFANITY DELAYS

SAMPLE RATE CONVERTERS

SILENCE DETECTORS

SOURCE SELECTORS

TRANSMISSION SWITCHERS

TONE GENERATORS

ACCESSORIES