Multimedia Communications - download pdf or read online

By Ioannis Katsavounidis, C.-C. Jay Kuo, Z. Zhang (auth.), Francesco De Natale, Silvano Pupolin (eds.)

ISBN-10: 1447108590

ISBN-13: 9781447108597

ISBN-10: 1852331356

ISBN-13: 9781852331351

Multimedia Communications is on the center of the complicated interactive companies that make up ultra-modern info Society. Videoconferencing, teleworking, teleshopping and video-on-demand will reap the benefits of advancements in broadband and cellular telecommunication platforms, clever multimedia terminals and electronic sign processing. the newest study findings from those fields are awarded right here within the court cases of the tenth Tyrrhenian Workshop on electronic Communications, held in Ischia, Italy, September 19 ninety eight. concentration is put on the next 4 components: sign Processing for Multimedia Communications. Modeling, research and Simulation of Multimedia site visitors resources. entry innovations. Multimode Multimedia Terminals. particularly, multimedia prone and functions are awarded. This entire choice of papers will let the reader to maintain velocity with the speedy adjustments which are occurring during this box. specialists have co-operated with best examine facilities all over the world, on an instructional and commercial point, to make this an updated reference quantity for all people who are occupied with technological advances in Multimedia allotted Systems.

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Assume that we have a tight frame cP = {lPm}~=l C RJ: with IIlPmll = 1 for all m and that y = Fx, where F is the frame operator associated with cP (see [13J and references therein for details on frames). This vector passes through the scalar quantizer Q: ii = Q(y). The entropy-coded components of ii can each be considered a description of x . 6 and that n < 2k. 6 and thus is well approximated . Since the constraints on x provided by each description are independent, on average, the diameter is a nonincreasing function of m.

F'm}meB is a frame, the minimum MSE estimate i is obtained with the dual frame of 4"; otherwise, x can only he estimated to within a subspace and distributional knowledge is needed to get a good estimate,' We model the quantizer as an additive white noise soufce,3 so '1 = ii - Fz has independent components and is independent of 1: with EI71m 12 = 0'2. When there are no erasures, the error between the reconstructed sig- nal z and source 1: is due only to the quantization noise. The MSE in this case is MSEo = k'l/j2jn [13].

Rinaldo Dipartimento di Elettronica e Informatica Via Gradenigo 6/a, 35131 Padova, Italy Abstract Subband coding is a popular and well established technique used in multimedia communications, such as audio, image and video transmission. In the absence of quantization and transmission errors, the analysis and synthesis filters in a subband coding scheme can be designed to obtain perfect reconstruction of the input signal, but this is no longer the optimal solution in the presence of quantization of the subband coefficients.

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Multimedia Communications by Ioannis Katsavounidis, C.-C. Jay Kuo, Z. Zhang (auth.), Francesco De Natale, Silvano Pupolin (eds.)

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