• HD Vision Switchers & Processors

Lawo V_link4

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V_link4 - the way to transport production-quality video over IP networks.

Conceptually, the V_link4 is designed to provide a one-box-solution for all the requirements of IP-based stage boxes including video and audio signal transport and processing. It includes everything from Video-over-IP coding to various monitoring and processing tools. All designed for one purpose: to provide a tool that increases the flexibility of any broadcast application, while saving valuable rack-space, set-up time and production costs. With its virtual cabling capability, V_link4 immediately brings IP infrastructure advantages and cost savings, providing an unparalleled degree of flexibility and scaleability.

With the performance and maturity of today’s IP network technology, video-, audio- and control-over-IP are becoming the solution of choice for many applications. Designed for "classic" applications like video contribution from a stage box or a stadium to an OB truck or from a studio to a control room, IP technology provides economic and operational advantages.

The Lawo V_link4 is the ideal tool for achieving this vision of IP-based broadcast production today, providing an easy and secure migration path from today's SDI-based infrastructures to IP. The device combines a fully bi-directional, four-channel Video-over-IP interface, four local SDI inputs and outputs, along with all the processing tools usually needed when contributing video and audio to a broadcast production.

The Lawo V_link4 provides four 3G / HD/ SD SDI inputs and four 3G / HD / SD SDI outputs for interfacing to external video equipment. The device is designed to convert these signals into IP streams and vice versa. These streams can be transported via standard Layer 3 IP LAN environments. V_link4 provides parallel encoding and de-coding in RAW or VC-2 (DiracPro) for local production and parallel encoding in MJPEG for low-latency monitoring applications. The IP-based approach allows easy signal routing via Lawo’s VSM control and monitoring system or via other external master control systems. No rewiring is needed as long as all devices are connected to the network. Since the device is based on a real network technology with multi-cast capability, it allows easy transmission of signals to multiple outputs within the network.

The V_link4’s coding engines are designed to meet the highest demands in video quality and signal transport reliability. Port redundancy with SMPTE2022-7 compliant hitless merge switching ensures signal availability and quality. Format and quality of the IP video streams can be configured individually to meet the optimal ratio between picture quality, latency and bandwidth. The 6 Ethernet ports are connected to an internal switch allowing to “tunnel” through the 10GBit any IP traffic such as camera control, RAVENNA streams or even office and internet IP traffic.

Supported video transport modes:

  • Raw mode for transparent transport of uncompressed, full production quality video with the lowest latency. SMPTE 2022-6** compatible. Full code stream bit rates: HD 1.5 Gbps, 3G 2.97 Gbps
  • Ultra low latency mode for transporting production quality video with ultra low latency VC-2 (DiracPro) Codec,  end-to-end delay incl. encoding and de-coding < 32 video lines
  • MJPEG mode for monitoring and IP-TV applications. MJPEG Encoder, full code stream bit rates typ. 60 Mbps, end-to-end delay with V__view_app < 3 frames.
  • Full support of source-timed frame accurate switching of SMPTE2022-6 video*
  • Full support of the AIMS roadmap


On 31 October 2019, the four leading broadcast and production houses Gearhouse Broadcast, Hyperactive Broadcast, Input Media and Chief Entertainment owned by Gravity Media Group started trading under the brand name of ‘Gravity Media’. All Gravity Media companies around the world are making this transition and will now go to market as a single brand with a bold new look and purpose.

under 1 roof2

Gravity Media is a leading global provider of complex live broadcast facilities and production services to content owners, creators and distributors. We use the collective pull of our people and resources to capture, craft and create world-class content that inspires and excites.

We are driven by client service excellence, and we never stand still. We’re always looking and listening, keeping up with the latest broadcast innovations – or pioneering them. Above all, we channel our energy into maintaining our reputation for flawless execution, deep technical expertise, and efficient delivery.

Gravity Media is a brand-new company with a 30-year pedigree, a force to be reckoned with formed by the coming together of Gearhouse Broadcast, HyperActive Broadcast, Input Media and Chief Entertainment. Our 500 people serve clients across the sport, media, news and entertainment industries from bases in the UK, Australia, USA, France, Germany and Qatar.

At the centre of Gravity Media lie three broad categories of expertise: media services & facilitiesproduction & content; and equipment rental & sales.

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