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Using FPGAs channel bonding for HDTV over DSL

On the basis of almost every day a new voice or video applications to enforce bandwidth requirements for DSL networks, while the telecom carrier in the United States and elsewhere in the world are aimed at providing digital and high-definition television (HDTV) for consumers. In order to achieve the provision of these services without the deployment of the new thread everywhere, the carrier shall use existing copper deployment already in the country.
Most DSL offer enough capacity for the delivery of STANDARD-DEFINITION TELEVISION (SDTV). Most programs are available from the streaming servers at bitrates of about 750 kB/s with some programs providing transfer 1,5 MB/S to a high-quality HDTV streaming and several channels at the same time, however, the House must have a bandwidth of at least 16 Mbps. newer generation DSL ADSL2 Though and VDSL can offer these speed, cannot offer high speed and sufficiently longer distance on a typical DSL. HDTV programs, therefore, can only be delivered to households to the DSLAMS. You are further away from the only receive lower-quality STANDARD-DEFINITION TELEVISION programming.

If you want to ensure that the DSL remains the preferred option for end users, service providers are looking for new ways to improve the performance of DSL networks. While the VDSL and ADSL2 provide higher performance, reduce distances are hard to overcome. Another scenario is to bring the DSLAM closer to end users, but they are often disproportionately high costs associated with installing a new device on your network.

Channel bonding in the DSLAM and DSL
DSL channel bonding is an ideal combination of features: higher bandwidth corresponding to all of the users and the possibility to extend the distance that can be achieved for a specific bandwidth. Instead of using a single copper pair, separates the DSL connection communications through a pile of copper pairs. To achieve the effective bandwidth of 12 MB/s, are three DSL 4 MB/s with channel for the processor on each end of the row. In most metallic network subscriber, you already are connected through a wire, so no need to install new cables provide the channel bonding service, as shown in Figure 1.

Download the pdf Using FPGA-Based channel for connection for HDTV over DSL

Posted by yono at 2:17 AM

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Labels: Electronic