Sciweavers

DCC
2004
IEEE
14 years 3 months ago
Slepian-Wolf Coding for Nonuniform Sources Using Turbo Codes
The recently proposed turbo-binning scheme is shown to be both efficient and optimal for uniform source Slepian-Wolf coding problem [1]. This paper studies the case when sources a...
Jing (Tiffany) Li, Zhenyu Tu, Rick S. Blum
DCC
2004
IEEE
14 years 3 months ago
Semi-Lossless Text Compression
A new notion, that of semi-lossless text compression, is introduced, and its applicability in various settings is investigated. First results suggest that it might be hard to explo...
Yair Kaufman, Shmuel T. Klein
DCC
2004
IEEE
14 years 3 months ago
On the Entropy of a Hidden Markov Process
We study the entropy rate of a hidden Markov process (HMP) defined by observing the output of a binary symmetric channel whose input is a first-order binary Markov process. Despit...
Philippe Jacquet, Gadiel Seroussi, Wojciech Szpank...
DCC
2004
IEEE
14 years 3 months ago
Predicting Wavelet Coefficients Over Edges Using Estimates Based on Nonlinear Approximants
It is well-known that wavelet transforms provide sparse decompositions over many types of image regions but not over image singularities/edges that manifest themselves along curve...
Onur G. Guleryuz
DCC
2004
IEEE
14 years 3 months ago
Fast Compression with a Static Model in High-Order Entropy
We report on a simple encoding format called wzip for decompressing block-sorting transforms, such as the Burrows-Wheeler Transform (BWT). Our compressor uses the simple notions o...
Luca Foschini, Roberto Grossi, Ankur Gupta, Jeffre...
DCC
2004
IEEE
14 years 3 months ago
Dual Frame Motion Compensation with Uneven Quality Assignment
Video codecs that use motion compensation have shown PSNR gains from the use of multiple frame prediction, in which more than one past reference frame is available for motion esti...
Vijay Chellappa, Pamela C. Cosman, Geoffrey M. Voe...
DCC
2004
IEEE
14 years 3 months ago
Computing Rate-Distortion Optimized Policies for Streaming Media with Rich Acknowledgments
We consider the problem of rate-distortion optimized streaming of packetized media over the Internet from a server to a client using rich acknowledgments. Instead of separately ac...
Jacob Chakareski, Bernd Girod
DCC
2004
IEEE
14 years 3 months ago
On Some New Approaches to Practical Slepian-Wolf Compression Inspired by Channel Coding
We introduce three new innovations for compression using LDPCs for the Slepian-Wolf problem. The first is a general iterative Slepian-Wolf decoding algorithm that incorporates the...
Anna H. Lee, Michelle Effros, Muriel Médard...