By Nikil Jayant
Broadband final Mile: entry applied sciences for Multimedia Communications offers in-depth remedies of entry applied sciences and the purposes that rely on them or aid them. It examines concepts and improvements alongside a number of dimensions in entry, with the overarching objective of making sure that the final mile isn't the susceptible hyperlink within the broadband chain. Written by way of specialists from the tutorial and advertisement segments of the sphere, the book's self-contained sections handle issues on the topic of the disciplines of communications, networking, computing, and sign processing.The middle of this remedy comprises modern reports of broadband pipes within the sessions of copper, cable, fiber, instant, and satellite tv for pc. It emphasizes the coexistence of those sessions inside of a community, the significance of optical communications for extraordinary bandwidth, and the flexibleness and mobility supplied through wireless.The booklet additionally contains point of view at the more and more very important subject of community administration, offering insights which are actual whatever the nature of the pipe. The textual content concludes with a dialogue of newly rising purposes and broadband services.This e-book deals an all-in-one remedy of the actual pipes and community architectures that make wealthy and more and more custom-made functions attainable. It serves as a priceless source for researchers and practitioners operating within the more and more pervasive box of broadband.
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Additional info for Broadband Last Mile: Access Technologies for Multimedia Communications (Signal Processing and Communications)
This section continues by providing a taxonomy of the different operating conditions for media applications over broadband networks — these different operating conditions are important because they have significant effects on the design of broadband applications and systems. A key operating condition is the required latency for the application, which varies considerably for file downloads, streaming, and interactive or conversational services. 2. The next three subsections examine important applications areas.
5, may arrive late) without rendering the entire media useless. Also, data delivery typically does not have a strict delivery constraint. On the other hand, media packets often have strict delivery deadlines, especially for conversational applications such as VoIP and videophone, or interactive applications such as computer games. Media packets that arrive after their respective delivery deadlines may be useless — with an effect equivalent to that if they had been lost. 5 Outline of Remainder of Chapter Many of the later chapters in this book focus on the last mile, discussing modulation coding and, to a lesser extent, channel coding and network coding.
Speech Compression. 2 kHz and commercial digital telephony uses a 64-kbps format called PCM. In some instances, the speech is compressed, with very little loss of quality, to 32 Copyright © 2005 by Taylor & Francis kbps by using adaptive differential pulse code modulation (ADPCM) in which the quantized information is an appropriate differential signal rather than the original speech sample. The differential signal is the result of a simple form of redundancy reduction. , each speech sample is predicted on the basis of the past ten samples).