theibcdaily Tuesday 17.09.13 13 Opinion
Network power and the green solution
Conference Today
One of the regular features of Tuesday at IBC is the open meeting presented by the Benelux branch of SCTE and hosted by IBC. These sessions, which are free to all attendees, provide a useful update on the current thinking in some critical areas. This year the topic
Eran Igler: “The future of wireless video link solutions”
Don’t miss a second
Bi-directional link technology ensures an exceptionally reliable and accurate wireless transmission, argues Eran Igler, chief executive officer, ABOnAir
While competition for rating and viewer engagement is growing significantly, broadcasters try to bring breaking news quickly, go on the air from remote or unexpected locations and provide unique shooting angles.
Football goals,
parachutists’ landings, split- second finishes at the Olympics… sports, news coverage and reality shows are replete with unrepeatable moments that should never be missed. Broadcast professionals can’t afford to fail to catch each thrilling second of their broadcast. Broadcast networks worldwide increasingly adopt wireless video technologies that transmit video content from cameras back to OB vans or central stations. Wireless solutions allow them to capture and transmit attractive and compelling content quickly and easily.
When using microwave technology, broadcasters must be particularly certain that the system link is stable and reliable, and that not even a single pixel is dropped. Microwave broadcast systems today
are based on uni-directional (or half-duplex) RF links, where the transmitter sends video content to the receiver and does not receive any feedback about the transmission quality. Uni-directional systems have no acknowledgement confirmation or error notification from the receiver. With no content confirmation or acknowledgment mechanism, uni-directional links cannot identify errors while they occur, and so they need to allocate large amount of the bandwidth for redundant information transmission. The redundancy enables the receiver to correct some of the errors in the received data and improve the overall error rate to an acceptable level.
In bi-directional links however, both transmitter and receiver can send and receive data and control information. This technology enables the receiver to acknowledge each pixel transmitted over the air and thus guarantees zero errors in transmission. The packet acknowledgment mechanism identifies errors and quickly fixes them (by re-transmitting the
corrupted data) before the frame is presented. By acknowledging the
correct acceptance of each packet of pixels, full-duplex systems enable continuous and reliable content transmission and allow broadcast professionals to rely on stable and accurate transmission.
In addition, bi-directional links double the system efficiency and provide higher net throughput since there is no need to constantly transmit redundant data, with only error information being re-sent. Bi-directional technology also enables fully automated system configuration based on changing conditions to ensure robust link performance – for example, since there is full
communication between the transmitter and receiver, both can identify new interference in the frequency they use and decide to move to a clearer frequency. In conclusion,
bi-directional solutions assure that all the data is well received without errors, and increase efficiency, picture quality, stability and robustness. 3.B20J
Smart links for tablets to lens
cmotion By David Fox
A new lightweight unit from cmotion promises to bridge the gap between professional equipment (camera and accessories) and smartphones, or tablets. Called cworld, it creates a wireless network to allow users to access and change system settings or other data from multiple devices. Users can also create detailed lens files for individual lenses, saving them with lens name, serial number and even the owner, as part of a lens management system that will
also enable cmotion to provide lens-specific precision engraved marker rings for the user’s hand unit.
It can also display an animation of the lens being controlled on a smart device, together with depth of field and distance data when used with Cine Tape, Arri’s UDM or cmotion’s cfinder, and to activate or deactivate auto focus functions. It should also make it simpler to find and apply firmware updates or look up user guides for cmotion’s systems, and – via cworld online support – allow cmotion technicians to undertake realtime, remote maintenance. 11.G42
concerns how we can deliver ever-more functionality through our communication networks, and at the same time meet our environmental obligations. The costs for power consumption in
networks are often forgotten but certainly add to the operational costs. What green solutions are available to optimise power consumption? How can we reduce energy requirements at each stage of the chain from the network hub all the way to the consumer devices? Through a mixture of specialist papers and lively debate, the session aims to give operators a better understanding of power consumption optimisation. All attendees are welcome to join the SCTE meeting at 10:00 in the Emerald Room.
View the Conference Programme on the IBC Mobile App for more information – download it for free at
www.ibc.org/mobileapp
Works by WiFi: cworld enables smart links to lenses and other camera equipment
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