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GCN : August 2013
NETWORKING CASE STUDY 28 GCN AUGUST 2013 • GCN.COM full motion 30 frames per second at full resolution, and even higher frame rates at lower levels. The high performance of newer models has been enabled by improved optics and advances in image sensors, along with increased processing power. Axis manu- factures its own purpose-designed video processing chips. The cameras also con- tain a second chip, the Axis Camera Ap- plication Platform, which enables third- party image analytics programming so that analysis can be done in the camera rather than waiting for images to be sent to a server, speeding response. "It's basically a computer with a lens," Rabell said. "It's a network device." To get all of that data over the network the camera uses the Motion JPEG video format and H.264 compression, which can reduce by 80 percent the bandwidth needed for full-definition images. This is important for tactical situations in which the Park Police uses the cameras, putting them up for single events and then taking them down to be used elsewhere, Mulhol- land said. Because there rarely is fixed backhaul available, the cameras often use cellular connections, and getting the most out of the limited bandwidth is necessary. The Q6035 and Q6032 models added to the Park Police toolkit this year are high- end cameras, and it makes sense to use them in high-security environments. But they are not necessary for every situation. "A camera is not a camera is not a cam- era," Mulholland said. "One size does not fit all." For general crowd monitoring and situational awareness, high resolution, advanced analysis and tracking capabili- ties are not needed. But for some uses, such as monitoring the area in which the president is or will be, keeping an eye on demonstrators, or watching for "persons of interest" in a specific area, "there is a much greater need for detail," he said. The U.S. Park Police have three-and- a-half years to prepare for the next inau- guration, but there will be events on the Mall and elsewhere around Washing- ton that will require heavy security well before that. There will be a number of events in August marking the 50th anni- versary of the 1963 March on Washing- ton at which the Rev. Martin Luther King made his "I Have a Dream" speech. And there are more than a dozen marathons, half-marathons and 5K runs scheduled in Washington through the rest of the year, including the Marine Corps Marathon in October that could have as many as 30,000 participants. These are drawing increased attention in the wake of the Boston Marathon bombing. "Even before Boston we had already started thinking about these races," Mul- holland said. "But now the ante is upped. That's the next big thing." • SEMINARS FOR PUBLIC SECTOR IT MANAGERS Stay up-to-date on the technology, tools and tactics that are key to managing and maintaining successful IT programs. Events are held in-person in Washington, DC or online nationwide. SEMINAR TOPICS INCLUDE: Visit gcn.com/ techessentials to register and for more event details