The stage box has long been a critical piece of equipment in live-event broadcasting because it provides a reliable and efficient way of getting on-stage feeds to the outside broadcast truck or TV/radio control room. This requirement remains true for IP-based networks and in response to this Lawo has launched a range of audio over IP (AoIP) stage boxes, which were shown at the recent BVE (Broadcast Video Expo) in London.
The new devices join Lawo's existing A_line series of AoIP interfaces and signal processors, including the A_mic8, A_digital8 and the A_madi4. The A_stage series offers Class A microphone pre-amps, digital analogue-to-digital FIR (finite impulse response) filtering and SM~PTE 2022-7 Seamless Protection Switching (SPS), plus two discrete redundant network links.
All mic/line inputs are switchable and can deal with both balanced and unbalanced sources. The stage boxes also feature AES3 I/O plus broadcast quality sample rate conversion, PTP/Word clock sync and conversion capacity and dual-redundant power inputs. The range comprises three units:
A_stage 80 is a maximum capacity 3RU multi-input AoIP stage box offering 32 switchable mic/line inputs, 32 analogue line outputs, eight stereo AES3 inputs and eight stereo AES3 outputs, eight opto-isolated GPIO ports adn dual 1000BT streaming and control ports on SFP/RJ45, with a separate RJ45 management port;
A_stage 48 is a 3RU unit and has 16 switchable mic/line inputs, 16 analogue line outputs, eight stereo AES3 inputs and eight stereo AES3 outputs on D-SUB connections, plus dual-redundant MADI ports on SFP, eight opto-isolated GPIO ports, dual 1000BT streaming and control on SFP/RJ45 and a 1000BT port RJ45;
A_stage 64 comes in a 4RU format and offers discrete I/O, with 32 switchable mic/line inputs, 16 analogue line outputs, eight stereo AES3 inputs and eight stereo AES3 outputs on XLR connectors, plus the same MADI, GPIO, streaming/control and management ports as found on the other two stage boxes.
The A_line range of AoIP nodes is able to stream uncompressed audio to Layer 3 networks in real-time over WANs and LANs. The units are able to convert a variety of audio formats - mic, line-level, AES3 and digitally encoded base band MADI - into AoIP streams through the SMPTE 2110-3-/31, AES67 and RAVENNA protocols.
You might also like...
In the last article in this series, we looked at how PTP V2.1 has improved security. In this part, we investigate how robustness and monitoring is further improved to provide resilient and accurate network timing.
Timing accuracy has been a fundamental component of broadcast infrastructures for as long as we’ve transmitted television pictures and sound. The time invariant nature of frame sampling still requires us to provide timing references with sub microsecond accuracy.
In the last article in this series we looked at how KVM improves control, reliability, security and integration for multiple devices and cloud systems. In this article, we look at how latency is addressed so that users have the best…
The need for synchronization rears its head in so many different endeavors that it has to be accepted as one of the great enabling technologies.
Having a collection of PCs and MACs stacked under a desk to facilitate the multitude of operational requirements not only proves difficult to operate but challenges our modern ideas around security and makes maintenance almost impossible.