WP270, Forward Error Correction in Digital Television Broadcast
White Paper: Virtex-5, Virtex-4, Spartan-3, LogiCORE R WP270 (v1.0.1) April 21, 2008 Forward Error Correction in Digital Television Broadcast Systems By: Michael Francis and Robert Green Digital television (DTV) broadcasting is in the process of migrating from analog to digital systems, with regions around the world at different stages of adoption. With some governments looking to auction off the remaining analog spectrum, deadlines have been set for regions to switch off analog TV transmission, resulting in growing demand for flexible technologies to enable a smooth transition in the timescales available. Various delivery systems are available for digital TV, but the main ones are satellite, cable, terrestrial, and mobile. Each has a variety of standards and derivatives that are either mature or emerging. These standards aim to ensure interoperability between different vendor’s equipment, including the set-top boxes, cell phones, and other means for DTV reception. Each region has their own requirements for a DTV delivery system, dependent on many factors, such as bandwidth available in the digital spectrum, the © 2007-2008 Xilinx, Inc. All rights reserved. XILINX, the Xilinx logo, and other designated brands included herein are trademarks of Xilinx, Inc. All other trademarks are the property of their respective owners. WP270 (v1.0.1) April 21, 2008 www.xilinx.com 1 R Introduction terrain––whether it is flat, mountainous, or a dense city center––or to add interactivity, perhaps for education or medical services in a developing country. All of these mean that one size does not necessarily fit all when it comes to the delivery mechanism.
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