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Analysis, visualization, and transformation of audio signals using dictionary-based methods

Analysis, visualization, and transformation of audio signals...

引用

International computer Music Conference, ICMC 2008

作者： Sturm, Bob L. Roads, Curtis McLeran, Aaron Shynk, John J. Department of Electrical and Computer Engineering University of California Santa BarbaraCA93106 United States Media Arts and Technology Program University of California Santa BarbaraCA93106 United States

This article provides an overview of dictionary-based methods (DBMs), and reviews recent work in the application of such methods to working with audio and music signals. As Fourier analysis is to additive synthesis, DBMs can be seen as the analytical counterpart to a generalized granular synthesis, where a sound is built by combining heterogeneous atoms selected from a user-defined dictionary. As such, DBMs provide novel ways for analyzing and visualizing audio signals, creating multiresolution descriptions of their contents, and designing sound transformations unique to a description of audio in terms of atoms.

关键词： Audio acoustics

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Cable-free audio delivery for home theater entertainment systems

Cable-free audio delivery for home theater entertainment sys...

引用

124th Audio engineering Society Convention 2008

作者： Floros, Andreas Tatlas, Nicolas-Alexander Mourjopoulos, John Grimanis, Dimitris Dept. of Audiovisual Arts Ionian University 49100 Corfu Greece Audio and Acoustic Technology Group Electrical Engineering and Computer Technology Department University of Patras 26500 Greece

ISBN: (纸本)9781605602950

Real time, multichannel audio content delivery over the air is expected to significantly simplify the interconnection complexity required for setting up typical home theater applications. However, despite the technological advantages of wireless networking standards related to high transmission rates and Quality-of-Service support, a number of issues have to be additionally addressed, such as multiple loudspeaker synchronization and packet delay/losses containing compressed quality and multiplexed audio data. In this work, further developments in the area of wireless audio delivery are presented by considering in detail multichannel reproduction for wireless home theater applications. Using both subjective and objective performance evaluation criteria, it is shown that cable-free multichannel audio playback is feasible under specific networking and audio coding conditions.

关键词： Theaters

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View-invariant full-body gesture recognition from video

View-invariant full-body gesture recognition from video

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作者： Peng, Bo Qian, Gang Rajko, Stjephan Arts Media and Engineering Program Arizona State University Tempe AZ 85287 United States Department of Electrical Engineering Arizona State University Tempe AZ 85287 United States Department of Computer Science and Engineering Arizona State University Tempe AZ 85287 United States

ISBN: (纸本)9781424421756

In this paper, we propose a video-based full-body gesture recognition system independent of the view angle of the cameras. We performed multilinear analysis on the silhouette images of the static poses making up the gestures by tensor decomposition and projection. Each pair of silhouette images is projected to a view-invariant low dimensional pose coefficient vector space. These pose vectors are then used as input vectors in hid- den Markov model (HMM) for gesture recognition. This system worked effectively in our experiments using real videos. © 2008 IEEE.

关键词： Gesture recognition

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iGlasses: An automatic wearable speech supplement in Face-to-Face communication and classroom situations

iGlasses: An automatic wearable speech supplement in Face-to...

引用

10th International Conference on Multimodal Interfaces, ICMI'08

作者： Massaro, Dominic W. Carreira-Perpiñáan, Miguel Á Merrill, David J. Sterling, Cass Bigler, Stephanie Piazza, Elise Perlman, Marcus Department of Psychology University of California Santa Cruz CA 95064 United States Electrical Engineering and Computer Science University of California Merced United States Media Lab Massachusetts Institute of Technology United States

ISBN: (纸本)9781605581989

The need for language aids is pervasive in today's world. There are millions of individuals who have language and speech challenges, and these individuals require additional support for communication and language learning. We demonstrate technology to supplement common face-to-face language interaction to enhance intelligibility, understanding, and communication, particularly for those with hearing impairments. Our research is investigating how to automatically supplement talking faces with information that is ordinarily conveyed by auditory means. This research consists of two areas of inquiry: 1) developing a neural network to perform real-time analysis of selected acoustic features for visual display, and 2) determining how quickly participants can learn to use these selected cues and how much they benefit from them when combined with speechreading. © 2008 ACM.

关键词： Speech communication

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A comparison of molecular approaches for generating sparse and structured multiresolution representations of audio and music signals

A comparison of molecular approaches for generating sparse a...

引用

7th European Conference on Noise Control 2008, EURONOISE 2008

作者： Sturm, B. Shynk, J.J. McLeran, A. Roads, C. Daudet, L. University of California Department of Electrical and Computer Engineering Box 117 Santa Barbara CA 93106 United States University of California Media Arts and Technology Program Santa Barbara CA 93106 United States UPMC Univ Paris 06 LAM IJLRA 11 rue de Lourmel 75015 Paris France

We compare the characteristics and performance of joint (single-step) and sequential (two-step) approaches for creating sparse and structured acoustic signal representations derived using overcomplete methods (OMs). A joint approach, such as molecular matching pursuit (MMP), attempts to find coherent structures in a signal as part of the decomposition process, while a sequential approach, such as agglomerative clustering (AC), attempts to find coherent structures after the signal decomposition. We review each approach, and examine their performance using real audio and music signals.

关键词： Audio acoustics

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Robust Human Pose Recognition Using Unlabelled Markers

Robust Human Pose Recognition Using Unlabelled Markers

引用

IEEE Workshop on Applications of computer Vision (WACV)

作者： Yi Wang Gang Qian Department of Computer Science and Engineering Arizona State University USA Arts Media and Engineering Program and Department of Electrical Engineering Arizona State University USA

In this paper, we tackle robust human pose recognition using unlabelled markers obtained from an optical marker-based motion capture system. A coarse-to-fine fast pose matching algorithm is presented with the following three steps. Given a query pose, firstly, the majority of the non-matching poses are rejected according to marker distributions along the radius and height dimensions. Secondly, relative rotation angles between the query pose and the remaining candidate poses are estimated using a fast histogram matching method based on circular convolution implemented using the fast Fourier transform. Finally, rotation angle estimates are refined using nonlinear least square minimization through the Levenberg-Marquardt minimization. In the presence of multiple solutions, false poses can be effectively removed by thresholding the minimized matching scores. The proposed framework can handle missing markers caused by occlusion. Experimental results using real motion capture data show the efficacy of the proposed approach.

关键词： Robustness Humans Least squares approximation Labeling Clouds Art Fast Fourier transforms Image recognition computer science Biomedical optical imaging

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Batch nearest neighbor search for video retrieval

Batch nearest neighbor search for video retrieval

引用

作者： Shao, Jie Huang, Zi Shen, Heng Tao Zhou, Xiaofang Lim, Ee-Peng Li, Yijun IEEE School of Information Technology and Electrical Engineering University of Queensland Brisbane QLD 4072 Australia Knowledge Media Institute Open University Milton Keynes MK7 6AA United Kingdom Division of Information Systems School of Computer Engineering Nanyang Technological University Singapore Singapore Nielsen Media Research Brisbane QLD 4000 Australia

To retrieve similar videos to a query clip from a large database, each video is often represented by a sequence of high-dimensional feature vectors. Typically, given a query video containing $m$ feature vectors, an independent nearest neighbor (NN) search for each feature vector is often first performed. After completing all the NN searches, an overall similarity is then computed, i.e., a single content-based video retrieval usually involves $m$ individual NN searches. Since normally nearby feature vectors in a video are similar, a large number of expensive random disk accesses are expected to repeatedly occur, which crucially affects the overall query performance. Batch nearest neighbor (BNN) search is stated as a batch operation that performs a number of individual NN searches. This paper presents a novel approach towards efficient high-dimensional BNN search called dynamic query ordering (DQO) for advanced optimizations of both I/O and CPU costs. Observing the overlapped candidates (or search space) of a pervious query may help to further reduce the candidate sets of subsequent queries, DQO aims at progressively finding a query order such that the common candidates among queries are fully utilized to maximally reduce the total number of candidates. Modelling the candidate set relationship of queries by a candidate overlapping graph (COG), DQO iteratively selects the next query to be executed based on its estimated pruning power to the rest of queries with the dynamically updated COG. Extensive experiments are conducted on real video datasets and show the significance of our BNN query processing strategy. © 2006 IEEE.

关键词： Content based retrieval

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Modelsim verification tool in testing cores-based system-on-chips

Modelsim verification tool in testing cores-based system-on-...

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27th IASTED International Conference on Modelling, Identification, and Control

作者： Das, Sunil R. Li, Jun Feng Hossain, Altaf Nayak, Amiya R. Petriu, Emil M. Biswas, Satyendra School of Information Technology and Engineering Faculty of Engineering University of Ottawa Ottawa ON K1N 6N5 Canada Department of Computer and Information Science College of Arts and Sciences Troy University Montgomery AL 36103 United States Department of Electrical Engineering and Technology Georgia Southern University Statesboro GA 30460 United States

ISBN: (纸本)9780889867116

The complexity of modern digital circuits has increased enormously particularly due to paradigm shift from system-on-board to designs embracing embedded cores-based system-on-chips (SOCs). The increased complexity has resulted in a huge challenge in setting up their appropriate fault testing environment. Though enormous efforts were directed to rapidly test very large-scale integrated (VLSI) circuit chips with reasonable cost, with advances in technology, new frontiers emerged. This paper aims at developing a method to verify and test circuit architecture under hardware and software codesign environment, targeting specifically embedded cores-based system-on-chips (SOCs). The well-known concept of design-for-testability (DFT) is utilized in the paper based on the use of ModelSim simulation and verification tool to test simulate the entire design. Some partial results on ISCAS 85 combinational benchmark circuit are provided in the paper, besides a comparison of the results with some previous works.

关键词： Design for testability

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Dedicated protection scheme with availability guarantee

Dedicated protection scheme with availability guarantee

引用

NETWORKS International Telecommunications Network Strategy and Planning Symposium

作者： J. Tapolcai P. Babarczi Pin-Han Ho Dept. of Telecommunications and Media Informatics Budapest University of Technology and Economics Hungary Dept. of Electrical and Computer Engineering University of Waterloo Canada

In this paper, a novel approach for availability evaluation is presented. In order to precisely capture the features of practical network operation and improve the accuracy in the availability evaluation, the dependency of network element failures is characterized by failure states (FS). For this purpose, a method that generating a failure state list for protection is developed and embedded in the proposed survivable routing algorithm such that the pre-defined connection availability can be guaranteed as simple as by protecting a single FS failure. Built on the availability evaluation a novel availability-constrained survivable routing algorithm, called Generalized Dedicated Protection (GDP), is introduced for circuit switched mesh networks. The proposed algorithm inherits the simplicity of dedicated protection mechanisms while offering the connection availability guarantee in presence of the network topological limitation that has been taken as the greatest challenge in the related research effort. Finally, extensive simulation is conducted to verify the advantages gained in the proposed GDP method compared with a number of previously reported counterparts.

关键词： Switches Heuristic algorithms

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A multi-modal floor-space for experiencing material deformation underfoot in virtual reality

A multi-modal floor-space for experiencing material deformat...

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IEEE International Workshop on Haptic, Audio and Visual Environments and Their Applications

作者： Alvin W. Law Benjamin V. Peck Yon Visell Paul G. Kry Jeremy R. Cooperstock Centre for Interdisciplinary Research in Music Media and Technology Centre for Intelligent Machines Department of Electrical and Computer Engineering McGill University Montreal Canada School of Computer Science McGill University Montreal Canada

We present a floor-space design that provides the impression of walking on various terrains by rendering graphical, audio and haptic stimuli synchronously with low latency. Currently, interactive floors tend to focus on visual and auditory feedback but have neglected to explore the role of haptics. Our design recreates these three modalities in a direct manner where the sensors and reactive cues are located in the same area. The goal of this project is the creation of a realistic and dynamic area of ground that allows multiple, untethered users to engage in intuitive interaction via locomotion in a virtual or augmented reality environment.

关键词： Virtual reality Legged locomotion Haptic interfaces Feedback Deformable models Delay Acoustic materials Snow Conferences Materials science and technology

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