By Nikil Jayant
Broadband final Mile: entry applied sciences for Multimedia Communications presents in-depth remedies of entry applied sciences and the purposes that rely on them or help them. It examines suggestions 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 means of specialists from the tutorial and advertisement segments of the sector, the book's self-contained sections handle themes regarding the disciplines of communications, networking, computing, and sign processing.The center 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 a community, the significance of optical communications for extraordinary bandwidth, and the flexibleness and mobility supplied by way of wireless.The e-book additionally contains standpoint at the more and more vital subject of community administration, supplying insights which are precise whatever the nature of the pipe. The textual content concludes with a dialogue of newly rising purposes and broadband services.This ebook deals an all-in-one remedy of the actual pipes and community architectures that make wealthy and more and more customized functions attainable. It serves as a precious source for researchers and practitioners operating within the more and more pervasive box of broadband.
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Extra info for Broadband Last Mile: Access Technologies for Multimedia Communications (Signal Processing and Communications)
The JPEG algorithm 23 is based on the 8 × 8–pixel 2-D DCT, scalar quantization, runlength, and Huffman coding, as described earlier in this section. ; however, most of the tools beyond the baseline algorithm are not widely used. 0 b/pixel. Lossless compression of images is very important in a number of applications, including compression of medical images and compression of non-natural images such as computer graphics or text. Although the original JPEG standard included a lossless coding algorithm, that algorithm achieved limited performance and was not widely used.
The second methodology, called analysis by synthesis, is based on the notion of considering a number of alternate encoding paradigms for each block of speech about 10 msec in length and picking the one that is best based on a perceptually weighted reconstruction error criterion. Although this methodology leads to a more complex encoder, it provides the key step towards realizing high-quality speech at bit rates as low as 4 kbps. To complete the picture, speech coding at bit rates on the order of 2 kbps is currently possible in terms of preserving intelligibility in the speech, but not from the point of view of quality, naturalness, or speaker recognition.
Instead, the standards have a limited scope to ensure interoperability while enabling as much differentiation as possible. The standards do not specify the encoder or the decoder; instead, they specify the bitstream syntax and the decoding process. The bitstream syntax is the format for representing the compressed data. The decoding process is the set of rules for interpreting the bitstream. Note that specifying the decoding process is different from specifying a specific decoder implementation.