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visiblu The Network Audio Operating System By Digigram
An audio processing and networking middleware developed for building digital radio infrastructures
Convergence is challenging the way radio enterprises need to program, interoperate and connect with the rest of the world. More and more, radio is becoming multimedia, interactive and collaborative. Digigram distilled its 20 year experience developing enabling audio technologies into one common set of tools designed for building AV/IT-based broadcast systems - around the block or around the world. Visiblu ® is a powerful software development framework that combines audio networking and processing technologies. Visiblu allows broadcasters and solution providers to easily create audio and data routing, transport, encoding and processing solutions across wide areas using standards-based network protocols. Visiblu is all about interoperability, managing audio network connections between remote sites from one central point. Flexible and easily scalable, it reduces connectivity costs compared to traditional methods. Visiblu enables broadcasters to exploit the ubiquity of Internet Protocol, already the new backbone of the telecommunications industry. Visiblu unifies sound card I/O and IP audio streaming protocols in an engine that runs under both Windows and Linux. While EtherSound can take advantage of its ultra-low latency within the station, visiblu provides robust IP connectivity to complete the transmission chain. Using Digigram’s renown MPEG codecs or full PCM linear audio, software-based contribution or distribution systems can be deployed on demand. Add to that Digigram’s professional audio mixing and effect processing, and you have a revolutionary toolkit for building a complete digital radio chain.
A distributed graph-style application programming interface (API) allows remote management of distributed audio resources and IP streams
Visiblu creating smart infrastructure
Visiblu creating smart infrastructure Key Features Visiblu Core
■ Visiblu Core provides a distributed and self-discovering system of PCs or embedded platforms. The API allows integrated management of audio resources, routing, selection of codecs, and audio processing across a standard IP network ■ Interoperability principles allowing large scale integration ■ Deterministic and low latency audio sample throughput ■ Secured network access to distributed platforms and resources ■ Distributed graph-based interface showing multiplatform view ■ File read and write management, including RF64 ■ Event trigger and control data management ■ Open API for custom development of plug-ins and connectors ■ Web-based licensing for customized option packages
Visiblu Audio Engine
■ Visiblu Audio Engine provides transparent control and mixing of audio from any source: IP streams, soundcard I/O, EtherSound channels, and Ethernet file streams ■ Native mono, stereo, or multichannel streams ■ Audio effects: Time scaling, multiband EQ, compression, limiter, maximizer, expansion ■ Synchronization to external clock : word clock, AES, with or without SRC ■ 32-bit floating point mixing, gain, fade control ■ Integration with DirectSound audio applications via Ulink virtual audio cable
Fluid IP Stream Engine
■ Fluid IP Stream Engine provides IP audio encoding and transport management ■ RTP/UDP transport protocol in unicast and multicast modes ■ Forward error correction : FEC scheme 3.2.2 on separate stream
■ Automatic clock drift management ■ Sample rate conversion (SRC) ■ Multiple simultaneous encodings in host CPU ■ Adjustable delay compensation and jitter management ■ NTP-based and inter-device synchronization ■ Stream mixing and re-synchronizing with different clock rates ■ Control data, markers and metadata payload ■ SDP/SAP/SIP description, stream signaling and session management
Audio Codecs
■ PCM linear 16/24 ■ ISO MPEG-1/2 L1, L2, L3 ■ ITU G.711/721/722/723/726 ■ MPEG-4 AAC, MPEG-4 AAC-LD ■ MPEG-4 HE-AACv2
Sample Applications
■ Program syndication and content distribution ■ Remote field contribution with audio mixer ■ Bidirectional studio to studio or studio to transmitter links ■ Automated IP audio feed recording, logging, archiving ■ Intercom, VoIP bridges and facility communications
Hardware Support
■ Digigram HR and PCIe series of VX and PCX soundcards, UAX range, and LX6464ES ■ Microsoft WDM or ALSA sound cards ■ Embedded Linux processors (e.g. ARM, PowerPC)
Supported SDK APIs
■ C++, Java, Borland, Delphi, COM, .NET
Supported Operating Systems
■ Windows XP, Linux 2.4/2.6, Windows Vista
Visiblu is an evolving technology with changing specifications. Please contact Digigram for further details. PRODUCTION STUDIO BROWSING, ARCHIVING JOURNALIST DESKTOP
ON AIR STUDIOS
NETWORK FEEDS CONTRIBUTION
MIXING SIGNAL PROCESSING REMOTE IP AUDIO STREAMING AUTOMATION AND AUDIO SERVER
REMOTE STUDIOS FACILITY ROUTER
visiblu The Network Audio Operating System By Digigram
With visiblu, a network-centric digital radio facility can interoperate and interconnect many classes of audio transport
CODEC AND MIXING FARM
STAND ALONE DIGITAL CONSOLE ETHERSOUND ENABLED CONSOLE
CD PLAYER TELEPHONE HYBRID CODEC
MONITOR AND CONTROL
Digigram SA
EtherSound DigiPro IP Audio Ethernet File Access/Control
Digigram Inc.
(Serving Europe, Africa, Middle East, Latin America)
Parc de Pré Milliet 38330 Montbonnot-FRANCE Tel: +33 (0)4 76 52 55 01 Fax: +33 (0)4 76 52 53 07 E-mail:
[email protected]
(Serving North America)
2101 Wilson Boulevard, Suite 1004, Arlington, VA 22201-USA Tel: +1 703 875 9100 Fax: +1 703 875 9161 E-mail:
[email protected]
Digigram Asia Pte Ltd. (Serving Asia and Australia/Oceania)
350 Orchard Road #19-07 Shaw House Singapore 238868-SINGAPORE Tel: +65 6291 2234 - Fax: +65 6291 3433 E-mail:
[email protected]
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