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— We propose a novel approach to reducing energy consumption in sensor networks using a distributed adaptive signal processing framework and efficient algorithm 1. While the topic of energy-aware routing to alleviate energy consumption in sensor networks has received attention recently [1,2], in this paper, we propose an orthogonal approach to previous(More)
Despite their widespread popularity, the JPEG and MPEG compression standards can lead to noticeable \blocking" artifacts { artiicial rectangular discontinuities in the decoded image. Powerful post-processing algorithms have been developed to remove blocking artifacts without destroying key image information. However, all but the simplest algorithms can be(More)
Block Cyclic Redundancy Check (CRC) codes are typically used to perform error detection in Automatic ReQuest (ARQ) protocols for data communications. Though efficient , CRC's can detect errors only after an entire block of data has been received and processed. In this work, we introduce a new " continuous " error detection scheme using arithmetic coding(More)
In this paper we propose a novel method for reducing energy consumption in a sensor network. It is important in a sensor network to minimize the energy usage of each sensor, because the nodes typically have finite battery life and if a node dies this can lead to a loss of data or a network partition. As a result, several researchers have proposed various(More)
— We propose a novel approach to reducing energy consumption in sensor networks using a distributed adaptive signal processing framework and efficient algorithm 1. While the topic of energy-aware routing to alleviate energy consumption in sensor networks has received attention recently [1,2], in this paper, we propose an orthogonal approach to complement(More)
Inspired by a recently proposed constructive framework for the distributed source coding problem [10], we propose a powerful constructive approach to the watermark-ing problem, emphasizing the dual roles of " source codes " and " channel codes. " In our framework, we explore various source and channel codes to achieve watermarks that are robust to attackers(More)
z TRW Abstract Block Cyclic Redundancy Check (CRC) codes represent a popular and powerful class of error detection techniques in modern data communication systems. Though eecient, CRC's can detect errors only after an entire block of data has been received and processed. In this work, we propose a new \continuous" error detection scheme using arithmetic(More)
We propose a powerful new solution to the multimedia watermarking problem by exploiting its duality with another problem for which we have recently made pioneering constructive contributions. This latter problem is that of distributed source coding, or compression of correlated sources that are distributed. We show how these two seemingly unrelated problems(More)