This paper investigates the problem of communicating video over a broadcast channel. The broadcast channel is expressed in terms of the channel capacity that exists between the transmitter and each receiver in the broadcast area { Shannon's separation theorem does not apply for video communication over this class of channels. Digital (discrete time, discrete amplitude) and hybrid (discrete time...

We consider communication between two parties using a bipartite quantum operation, which constitutes the most general quantum mechanical model of two-party communication. We primarily focus on the simultaneous forward and backward communication of classical messages. For the case in which the two parties share unlimited prior entanglement, we give inner and outer bounds on the achievable rate r...

In both information-theoretic and computationally-secure MultiParty Computation (MPC) protocols the parties are usually assumed to be connected by a complete network of secure or authenticated channels, respectively. Taking inspiration from a recent, highly efficient, threeparty honest-majority computationally-secure MPC protocol of Araki et al., we show how to perform the most costly part of a...

In this paper we present the design and implementation of a programming paradigm that provides a natural representation for multimedia data types. We have adapted the channel concept from CSP/Occam to fit data types such as audio and video. Our channels are mobile: a channel end (or port) can be passed from one process to another. Although communication over our channels is logically synchronou...

Suppose Q is a family of discrete memoryless channels. An unknown member of Q will be available, with perfect, causal output feedback for communication. Is there a coding scheme (possibly with variable transmission time) that can achieve the Burnashev error exponent uniformly over Q ? For two families of channels we show that the answer is yes. Furthermore, for each of these two classes, in add...

1 This research was conducted in part while Micah Adler was at the Computer Science Department of the University of Toronto (supported by an operating grant from the Natural Sciences and Engineering Research Council of Canada, and by ITRC, an Ontario Centre of Excellence), and in part while he was at the Heinz Nixdorf Institute Graduate College, Paderborn, Germany. Department of Computer Scienc...

information technology has demolished time and distance. the new communication technologies have become dominant in contemporary world politics. the tools such as mobile phones, internet and satellite networks play supporting role in social changes with strengthening public space. we witness the effectiveness of new media in the recent unprecedented developments in arabic countries. the social ...