The over the air broadcast market has an increasing demand of dual polarized antenna systems. Especially in the US, where operators can use the vertical polarization as an additional propagation path, dual polarization antennas are highly desirable and sought after for NextGen TV. Up to now, there has not been an UHF plug & play dual polarized broadband omni antenna available in the market.
The quality of the installation of the antenna system is at least as important as the quality of the products themselves to ensure safe and trouble-free operation over a long period. With transmitter powers of up to over 100 kW, even small errors could mean serious damage to the material.
The antennas of the Südwestrundfunk (SWR) at the “Hochblauen” location in the southern Black Forest were completely renewed or replaced in the last half of the year. A very special and tailor-made antenna system was used here for the first time, which made special planning by the KATHREIN engineers necessary. To save space, 3 vertically polarized DAB dipoles were nested in the horizontally polarized VHF system consisting of LogPer antennas. For this, numerous simulations and measurements were necessary in order to meet the specifications in the end.
Mediaproxy Case Study: AMC Newtworks
AMC Networks International (AMCNI) is the global distribution division of US cable operator and entertainment media group AMC Networks Inc. Its activities are divided across different regional territories, each with a dedicated operating unit handling multiple television channels broadcasting targeted programming, in specific languages, to countries within its region. Each channel is available on a variety of platforms to multiple devices, calling for extensive compliance monitoring to ensure output conforms to different regulatory standards and provides a consistent level of quality for viewers.
AMCNI Central and Northern Europe, which covers 14 nations including Germany, the Czech Republic, Serbia, Slovenia and Ukraine, updated its logging and analysis system four years ago with the installation of a Mediaproxy LogServer monitor and analyzer. It is now in the process of expanding this set-up to accommodate new services.
Serial Digital Interface (SDI) has, until recently, been the preferred transport mechanism for broadcast transmission. Its main advantage is that it provides a consistent and predictable delivery of data which is ideal for audio/video transport. However, networks in the broadcast industry are now in a state of flux. Increasingly there is a shift away from single-purpose legacy systems like SDI, and a shift towards multi-purpose IP-based networks.
We asked Grass Valley’s VP Product Marketing, Boromy Ung, to tell us about the company’s recently launched Grass Valley Technology Alliance (GVTA) – why it was created, what are the requirements for membership and how he sees it developing over the coming months and years.
For over a decade, content creation infrastructure has been penetrated by IP-based networks and network-attached storage products. Even editorial shared storage, once the bastion of a handful of high-end facilities, has become commonplace throughout the industry with the help of network file systems and lower cost 1/10Gb Ethernet hardware and relative ubiquity of support in popular desktop operating systems.
In the move toward these networks, operators and administrators have learned to live with the challenges brought about by IP-based technology. These include dependency on external IT resources, variations in desktop OS network file system support, lack of isolation causing traffic disruptions and security concerns, and higher resource usage on desktop PCs when processing Ethernet transactions.
Are these limitations worth the benefits? Before jumping wholesale into an all-IP future, content creation professionals should consider what is lost in the move towards NAS topology, what is better achieved with a custom shared file system through Fibre Channel, and whether there is a happy medium to be found.
There’s no turning back but the future is far from clear or certain for many. New tools for broadcast and media in every department but how to put them to work to best advantage is still a challenge for most.
This 2 day course will build your understanding of the fundamentals of networking, in which data is transported as packets switched and routed around a common infrastructure. You will learn the key network protocols used and the network layers that are commonly used to understand their scope and function in routing packets between IT hosts and from network to network. The emphasis will be on Ethernet (layer 2) and Internet Protocol (layer 3). You will learn the essentials of enterprise networks and the ways that a network infrastructure can used for media applications.
Delegates will build practical networks hands-on to deliver unicast video streams across routed and switched networks. The resilience of the network to deliver video streams at layer 2 (spanning tree / rapid spanning tree) will be compared and contrasted practically with the failover of routing protocols at layer 3 (OSPF routing protocol). Layer 3 switches will be used for interconnecting networks and typical commands required for these exercises will be covered on the course.
Dr Amal Punchihewa, Director of Technology and Innovation, ABU Dr Punchihewa discusses how in coming years we can expect the co-existence of SDI & IP in hybrid configurations and to enjoy the benefits of IP fully we must have open standards and interoperability. [maxbutton id="104" ]