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Slepian-Wolf coding over broadcast channels

It is shown with an example that an optimal joint source-channel coding strategy is strictly advantageous over the combination of stand-alone source and channel codes, and thus "informational separation" does not hold.
IEEE (opens in a new tab)

Vector approximation based indexing for non-uniform high dimensional data sets

The VAle, a new technique for indexing high dimensional data sets based on vector approximations, is proposed and an evaluation of nearest neighbor queries shows that the VAle technique results in improvements over the current VAle approach for several real data sets.
ACM (opens in a new tab)

Capacity/Storage Tradeoff in High-Dimensional Identification Systems

It is shown that a necessary and sufficient condition for a two-stage system to achieve single-stage capacities at each stage is Markovity of the optimal test channels.
IEEE (opens in a new tab)

Rate regions for the separated two-way relay channel

A two-way relay channel in which two users communicate with each other over a relay terminal is considered, and it is shown that the compress-and-forward scheme achieves rates within half bit of the capacity region in the Gaussian setting.
IEEE (opens in a new tab)

On error exponents in hypothesis testing

The classical result of Blahut, which characterizes achievable error exponents in binary hypothesis testing, is generalized in two different directions and shown by an example that optimal sensor decisions may indeed be random.
IEEE (opens in a new tab)

Image sequence analysis for emerging interactive multimedia services-the European COST 211 framework

A significant effort of the COST 211/sup ter/ group activities is dedicated toward image and video sequence analysis and segmentation-an important technological aspect for the success of emerging object-based MPEG-4 and MPEG-7 multimedia applications.
Publisher (opens in a new tab)

Energy-Distortion Exponents in Lossy Transmission of Gaussian Sources Over Gaussian Channels

It is shown that the same energy-distortion exponent as in the infinite-delay case can be achieved in all the studied scenarios of lossy transmission of Gaussian sources over energy-limited Gaussian point-to-point and broadcast channels.
IEEE (opens in a new tab)

Wyner–Ziv Coding Over Broadcast Channels: Digital Schemes

A digital scheme that combines ideas from the lossless version of the problem, i.e., Slepian-Wolf coding over broadcast channels, and dirty paper coding, is presented and analyzed and it is shown that it is more advantageous to send the refinement information to the receiver with ¿better¿ combined quality.
IEEE (opens in a new tab)

On Asymptotic Analysis of Energy-Distortion Tradeoff for Low-Delay Transmission over Gaussian Channels

Asymptotic energy-distortion performance of zero-and low-delay communication scenarios under additive white Gaussian noise (AWGN) is investigated and the proposed coding scheme achieves a constant dispersion.
IEEE (opens in a new tab)

Successive Refinement of Vector Sources Under Individual Distortion Criteria

Analysis of 2-D binary symmetric sources with Hamming distortion reveals that the behavior of these sources with respect to successive refinability exhibits remarkable similarity to their 2- D Gaussian counterparts.
IEEE (opens in a new tab)
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