نتایج جستجو برای: source coding

تعداد نتایج: 537349  

1999
Igor Kozintsev Ralf Koetter Kannan Ramchandran

We propose a novel factor graph framework for joint source-channel coding for communication with a-delity criterion. We consider a class of source models that are used in current state-of-the-art transform image coding schemes. We construct a global graph-ical model that includes both the channel coding redundancy and the source model and we apply the sum-product algorithm to estimate the trans...

2006
Minje Kim Seungjin Choi

In this paper we present a method for polyphonic music source separation from their monaural mixture, where the underlying assumption is that the harmonic structure of a musical instrument remains roughly the same even if it is played at various pitches and is recorded in various mixing environments. We incorporate with nonnegativity, shift-invariance, and sparseness to select representative sp...

Journal: :CoRR 2017
Alberto Ravagnani Frank R. Kschischang

A combinatorial framework for adversarial network coding is presented. Channels are described by specifying the possible actions that one or more (possibly coordinated) adversaries may take. Upper bounds on three notions of capacity—the one-shot capacity, the zero-error capacity, and the compound zero-error capacity—are obtained for point-to-point channels, and generalized to corresponding capa...

2001
Om Parkash P. K. Sharma

Noiseless coding theorems connected with fuzzy entropies corresponding to Shannon, Renyi and Havrada and Charvat have been established. The upper bounds of these entropies in terms of mean code word lengths have been provided and some interesting properties of these codeword lengths have been studied.

2007
James E. Fowler Béatrice Pesquet-Popescu

The use of wavelets in the broad areas of source coding, communications, and networks is surveyed. Specifically, the impact of wavelets and wavelet theory in image coding, video coding, image interpolation, image-adaptive lifting transforms, multiple-description coding, and joint source-channel coding is overviewed. Recent contributions in these areas arising in the subsequent papers of the pre...

Journal: :EURASIP J. Image and Video Processing 2007
James E. Fowler Béatrice Pesquet-Popescu

The use of wavelets in the broad areas of source coding, communications, and networks is surveyed. Specifically, the impact of wavelets and wavelet theory in image coding, video coding, image interpolation, image-adaptive lifting transforms, multipledescription coding, and joint source-channel coding is overviewed. Recent contributions in these areas arising in subsequent papers of the present ...

Journal: :IEEE Trans. Information Theory 1989
John C. Kieffer

1259 Ahsfracf-We associate with a given nonstationary finite-alphabet information source a certain class of stationary processes which we term the stationary hull of the given source. It is then shown that the optimum average rate at which the given source can be noiselessly coded via finite-state adaptive block to variable-length coding schemes is the largest entropy rate among those processes...

2004
Michelle Effros Ralf Koetter Andrea J. Goldsmith Muriel Médard

We compare two strategies for lossy source description across a pair of unreliable channels. In the first strategy, we use a broadcast channel code to achieve a different rate for each possible channel realization, and then use a multiresolution source code to describe the source at the resulting rates. In the second strategy, we use a channel coding strategy for two independent channels couple...

In this paper, a new method for image denoising based on incoherent dictionary learning and domain transfer technique is proposed. The idea of using sparse representation concept is one of the most interesting areas for researchers. The goal of sparse coding is to approximately model the input data as a weighted linear combination of a small number of basis vectors. Two characteristics should b...

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