Embedded Systems Design Europe - November 2007 - (Page 26) wireless While most of the approaches are new to the market, their performance differs greatly. wireless digital-video BY WAYNE DANIEL Choose the best architecture A 26 number of wireless digital-video technologies are beginning to appear on the market. It’s interesting that, at this time last year, no satisfactory architectures were available. Because of the high bandwidth required, video has been difficult to support over wireless communications. With the emergence of ultrawideband (UWB), users of digital video and other bandwidth-intensive applications can now enjoy the benefits of mobility without a fistful of cables. Several architectures based on UWB technology have emerged that use different approaches to wireless digital video. Each takes unique approaches that result in different performance, size, and cost. Some integrate directly with existing functions available on the wired system, while others may require additional components, such as CPUs, encoders, and decoders, to complete the system. In evaluating the various wireless architectures for digital video, you should carefully analyze the architecture you choose to make sure it truly meets your system’s requirements at the lowest cost and best performance. The final goal is to enable the same user experience as a wired connection. Before you start analyzing the options, you’ll need to define your digital-video application and know what devices will be sending (hosting) and accepting (receiving) wireless video. For instance, you want to add wireless capability to a system that consists of a handheld portable video source and a monitor or between a home NOVEMBER – DECEMBER 2007 | embedded systems design europe | www.embedded.com/europe 026-027-028-029_ESDE.indd 26 6/11/07 17:22:37 http://www.embedded.com/europe
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