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The paper develops application of techniques from robust and universal hypothesis testing for anomaly detection and change-point detection in dynamic, interconnected systems. This theory is extended using the concept of projected Markov models originally proposed by Claude Shannon. Also presented is a detailed application to anomaly detection from people movements patterns in buildings.
We introduce the sensor-utility-network (SUN) method for occupancy estimation in buildings. Based on inputs from a variety of sensor measurements, along with historical data regarding building utilization, the SUN estimator produces occupancy estimates through the solution of a receding-horizon convex optimization problem. State-of-the-art on-line occupancy algorithms rely on indirect measurements,...
Providing real-time estimates of building occupancy to first responders during emergency events can help in search and rescue, and egress management. This paper addresses the estimation of occupancy in each zone of a building, where the building is spatially divided into non-overlapping zones that cover all areas of the building. Each zone contains video cameras located at each portal of the zone,...
This paper proposes objective quality measures adopted in speech processing for perceptual quality evaluation of audio watermarking. Different from using an auditory perception model that mimics human auditory system, objective quality measures are introduced as alternative approach to perceive the dissimilarities caused by audio watermarking. After embedding the watermark into a variety of audio...
In this paper, a novel highly confidential audio watermarking scheme using multiple scrambling is presented. Superior to other techniques, the new scheme is self-secured by integrating multiple scrambling operations into the embedding stage. To ensure that unauthorized detection without correct secret keys is nearly impossible, the following have been made. The watermark is encrypted by a coded-image;...
In this paper, an efficient audio watermarking detection is developed to revive a watermark attacked by hazardous synchronization attacks, such as time-scale and pitch-scale modifications (TSM and PSM). It outperforms the robustness of our previously implemented audio watermarking scheme by resisting excessive distortion of up to ??10%. The key idea of the method is adaptively aligning the frequency...
The essence of watermarking technique is imperceptibly watermarking the audio media with a secret watermark for copyright protection. Robustness is one vital property of any practical watermarking scheme. To claim its effect on ownership verification, a watermarking scheme must withstand various dasiaattackspsila, including ordinary signal processing operations and malicious tampering. In this paper,...
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