News & Events

50 were found.




  •  NEWS   MERL to present 10 papers at ICASSP 2017
    Date: March 5, 2017 - March 9, 2017
    Where: New Orleans
    MERL Contacts: Petros Boufounos; Chen Feng; John Hershey; Takaaki Hori; Jonathan Le Roux; Dehong Liu; Hassan Mansour; Dong Tian; Anthony Vetro; Ye Wang
    Research Areas: Multimedia, Computer Vision, Computational Geometry, Computational Sensing, Digital Video, Information Security, Speech & Audio
    Brief
    • MERL researchers will presented 10 papers at the upcoming IEEE International Conference on Acoustics, Speech & Signal Processing (ICASSP), to be held in New Orleans from March 5-9, 2017. Topics to be presented include recent advances in speech recognition and audio processing; graph signal processing; computational imaging; and privacy-preserving data analysis.

      ICASSP is the flagship conference of the IEEE Signal Processing Society, and the world's largest and most comprehensive technical conference focused on the research advances and latest technological development in signal and information processing. The event attracts more than 2000 participants each year.
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  •  TALK   High-Dimensional Analysis of Stochastic Optimization Algorithms for Estimation and Learning
    Date & Time: Tuesday, December 13, 2016; Noon
    Speaker: Yue M. Lu, John A. Paulson School of Engineering and Applied Sciences, Harvard University
    MERL Host: Petros Boufounos
    Research Areas: Multimedia, Computational Sensing, Machine Learning
    Brief
    • In this talk, we will present a framework for analyzing, in the high-dimensional limit, the exact dynamics of several stochastic optimization algorithms that arise in signal and information processing. For concreteness, we consider two prototypical problems: sparse principal component analysis and regularized linear regression (e.g. LASSO). For each case, we show that the time-varying estimates given by the algorithms will converge weakly to a deterministic "limiting process" in the high-dimensional limit. Moreover, this limiting process can be characterized as the unique solution of a nonlinear PDE, and it provides exact information regarding the asymptotic performance of the algorithms. For example, performance metrics such as the MSE, the cosine similarity and the misclassification rate in sparse support recovery can all be obtained by examining the deterministic limiting process. A steady-state analysis of the nonlinear PDE also reveals interesting phase transition phenomena related to the performance of the algorithms. Although our analysis is asymptotic in nature, numerical simulations show that the theoretical predictions are accurate for moderate signal dimensions.
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  •  TALK   Collaborative dictionary learning from big, distributed data
    Date & Time: Friday, December 2, 2016; 11:00 AM
    Speaker: Prof. Waheed Bajwa, Rutgers University
    MERL Host: Petros Boufounos
    Research Areas: Multimedia, Computational Sensing
    Brief
    • While distributed information processing has a rich history, relatively less attention has been paid to the problem of collaborative learning of nonlinear geometric structures underlying data distributed across sites that are connected to each other in an arbitrary topology. In this talk, we discuss this problem in the context of collaborative dictionary learning from big, distributed data. It is assumed that a number of geographically-distributed, interconnected sites have massive local data and they are interested in collaboratively learning a low-dimensional geometric structure underlying these data. In contrast to some of the previous works on subspace-based data representations, we focus on the geometric structure of a union of subspaces (UoS). In this regard, we propose a distributed algorithm, termed cloud K-SVD, for collaborative learning of a UoS structure underlying distributed data of interest. The goal of cloud K-SVD is to learn an overcomplete dictionary at each individual site such that every sample in the distributed data can be represented through a small number of atoms of the learned dictionary. Cloud K-SVD accomplishes this goal without requiring communication of individual data samples between different sites. In this talk, we also theoretically characterize deviations of the dictionaries learned at individual sites by cloud K-SVD from a centralized solution. Finally, we numerically illustrate the efficacy of cloud K-SVD in the context of supervised training of nonlinear classsifiers from distributed, labaled training data.
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  •  NEWS   MERL makes a strong showing at the American Control Conference
    Date: July 6, 2016 - July 8, 2016
    Where: American Control Conference (ACC)
    MERL Contacts: Mouhacine Benosman; Scott Bortoff; Petros Boufounos; Daniel Burns; Claus Danielson; Stefano Di Cairano; Amir-massoud Farahmand; Abraham Goldsmith; Piyush Grover; Uros Kalabic; Andrew Knyazev; Christopher Laughman; Daniel Nikovski; Arvind Raghunathan; Yebin Wang; Avishai Weiss
    Research Areas: Multimedia, Data Analytics, Mechatronics, Business Innovation, Advanced Control Systems, Dynamical Systems, Machine Learning, Predictive Modeling
    Brief
    • The premier American Control Conference (ACC) takes place in Boston July 6-8. This year MERL researchers will present a record 20 papers(!) at ACC, with several contributions, especially in autonomous vehicle path planning and in Model Predictive Control (MPC) theory and applications, including manufacturing machines, electric motors, satellite station keeping, and HVAC. Other important themes developed in MERL's presentations concern adaptation, learning, and optimization in control systems.
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  •  NEWS   MERL researchers present 12 papers at ICASSP 2016
    Date: March 20, 2016 - March 25, 2016
    Where: Shanghai, China
    MERL Contacts: Petros Boufounos; John Hershey; Chiori Hori; Takaaki Hori; Kyeong Jin (K.J.) Kim; Jonathan Le Roux; Dehong Liu; Hassan Mansour; Philip Orlik; Milutin Pajovic; Dong Tian; Anthony Vetro
    Research Areas: Electronics & Communications, Multimedia, Computational Sensing, Digital Video, Speech & Audio, Wireless Communications & Signal Processing, Signal Processing, Wireless Communications
    Brief
    • MERL researchers have presented 12 papers at the recent IEEE International Conference on Acoustics, Speech & Signal Processing (ICASSP), which was held in Shanghai, China from March 20-25, 2016. ICASSP is the flagship conference of the IEEE Signal Processing Society, and the world's largest and most comprehensive technical conference focused on the research advances and latest technological development in signal and information processing, with more than 1200 papers presented and over 2000 participants.
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  •  AWARD   2015 IEEE Signal Processing Society Best Paper Award
    Date: December 1, 2015
    Awarded to: Mark A. Davenport, Petros T. Boufounos, Michael B. Wakin and Richard G. Baraniuk
    MERL Contact: Petros Boufounos
    Research Areas: Multimedia, Computational Sensing
    Brief
    • Petros Boufounos is a recipient of the 2015 IEEE Signal Processing Society Best Paper Award for the paper that he co-authored with Mark A. Davenport, Michael B. Wakin and Richard G. Baraniuk on "Signal Processing with Compressive Measurements" which was published in the April 2010 issue of IEEE Journal of Selected Topics in Signal Processing. The Best Paper Award honors the author(s) of a paper of exceptional merit dealing with a subject related to the Society's technical scope, and appearing in one of the Society's solely owned transactions or the Journal of Selected Topics in Signal Processing. Eligibility is based on a five-year window: for example, for the 2015 Award, the paper must have appeared in one of the Society's Transactions between January 1, 2010 and December 31, 2014.
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  •  NEWS   Multimedia Group researchers presented 8 papers at ICASSP 2015
    Date: April 19, 2015 - April 24, 2015
    Where: IEEE International Conference on Acoustics, Speech & Signal Processing (ICASSP)
    MERL Contacts: Anthony Vetro; Hassan Mansour; Petros Boufounos; John Hershey; Jonathan Le Roux
    Research Area: Multimedia
    Brief
    • Multimedia Group researchers have presented 8 papers at the recent IEEE International Conference on Acoustics, Speech & Signal Processing, which was held in Brisbane, Australia from April 19-24, 2015.
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  •  NEWS   Petros Boufounos appointed to the SigPort Board of the IEEE Signal Processing Society
    Date: March 1, 2015
    MERL Contact: Petros Boufounos
    Research Area: Multimedia
    Brief
    • Signal Processing Repository (SigPort) is an online repository of manuscripts, reports, technical white papers, theses, and supporting materials. Created and supported by the IEEE Signal Processing Society (SPS), SigPort collects technical material of interests to the broad signal processing community. It hosts material to help individuals obtain early and broad exposure on their work. MERL researcher, Petros Boufounos, was appointed to the SigPort Board for a 3-year term from 1 January 2015 to 31 December 2017.
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  •  EVENT   Internships & Careers at MERL
    Date & Time: Friday, December 5, 2014; 12:00 noon - 2:00 pm
    MERL Contact: Petros Boufounos
    Location: Tufts University, Halligan Hall, Room 102
    Brief
    • Come learn about MERL, our internships and our career options.

      Mitsubishi Electric Research Labs (MERL) is home to some of the world's leading experts conducting fundamental and applied research in a variety of areas, such as Computer Vision, Audio & Video Processing, Digital Communications, Data Analytics, Mechatronics and Algorithms. Our overriding vision is to deliver innovation that has a lasting impact on the world — innovation that will be remembered 100 years from now.

      Each year, we hire 40-60 talented and motivated graduate students for summer internships. Come learn more about the work we do and meet with some of our researchers. The reception will include an a brief overview of our research and some demos. We will also have pizza and cupcakes!

      For those of you ready to graduate, we also have several research staff and post-doc openings. Hiring managers and researchers will be on hand to discuss these career opportunities at MERL.

      Session Agenda
      12:00 - 12:15 Welcome, sign-in
      12:15 - 12:30 Research overview
      12:30 - 1:30 Demos & discussion
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  •  AWARD   GRSS 2014 Symposium Prize Paper Award
    Date: May 1, 2014
    Awarded to: Dehong Liu and Petros T. Boufounos
    Awarded for: "Synthetic Aperture Imaging Using a Randomly Steered Spotlight"
    Awarded by: IEEE Geoscience and Remote Sensing Society (GRSS)
    MERL Contacts: Dehong Liu; Petros Boufounos
    Research Areas: Multimedia, Computational Sensing
    Brief
    • Dehong Liu and Petros T. Boufounos are the recipients of the the IEEE Geoscience and Remote Sensing Society 2014 Symposium Prize Paper Award for their paper "Synthetic Aperture Imaging Using a Randomly Steered Spotlight," presented at IGARSS 2013 (TR2013-070).
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  •  NEWS   MERL Researcher appointed Senior Area Editor for IEEE Signal Processing Letters
    Date: February 11, 2014
    Where: IEEE Signal Processing Letters
    MERL Contact: Petros Boufounos
    Research Area: Multimedia
    Brief
    • Petros Boufounos was appointed as a Senior Area Editor of IEEE Signal Processing Letters.
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  •  NEWS   Signal Processing with Adaptive Sparse Structural Representation (SPARS): publication by Petros T. Boufounos
    Date: July 8, 2013
    Where: Signal Processing with Adaptive Sparse Structural Representation (SPARS)
    MERL Contact: Petros Boufounos
    Research Area: Multimedia
    Brief
    • The article "On Embedding the Angles Between Signals" by Boufounos, P.T. was published in Signal Processing with Adaptive Sparse Structural Representation (SPARS)
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  •  NEWS   International Conference on Sampling Theory and Applications (SampTA): publication by Petros T. Boufounos
    Date: July 1, 2013
    Where: International Conference on Sampling Theory and Applications (SampTA)
    MERL Contact: Petros Boufounos
    Research Area: Multimedia
    Brief
    • The paper "Sparse Signal Reconstruction from Phase-only Measurements" by Boufounos, P.T. was presented at the International Conference on Sampling Theory and Applications (SampTA)
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  •  EVENT   ICASSP 2013 - Student Career Luncheon
    Date & Time: Thursday, May 30, 2013; 12:30 PM - 2:30 PM
    MERL Contacts: Anthony Vetro; Petros Boufounos; Jonathan Le Roux
    Location: Vancouver, Canada
    Research Areas: Multimedia, Speech & Audio
    Brief
    • MERL is a sponsor for the first ICASSP Student Career Luncheon that will take place at ICASSP 2013. MERL members will take part in the event to introduce MERL and talk with students interested in positions or internships.
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  •  NEWS   ICASSP 2013: 9 publications by Jonathan Le Roux, Dehong Liu, Robert A. Cohen, Dong Tian, Shantanu D. Rane, Jianlin Guo, John R. Hershey, Shinji Watanabe, Petros T. Boufounos, Zafer Sahinoglu and Anthony Vetro
    Date: May 26, 2013
    Where: IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
    MERL Contacts: Dehong Liu; Robert Cohen; Jianlin Guo; John Hershey; Anthony Vetro; Dong Tian; Petros Boufounos; Jonathan Le Roux
    Research Areas: Multimedia, Electronics & Communications
    Brief
    • The papers "Stereo-based Feature Enhancement Using Dictionary Learning" by Watanabe, S. and Hershey, J.R., "Effectiveness of Discriminative Training and Feature Transformation for Reverberated and Noisy Speech" by Tachioka, Y., Watanabe, S. and Hershey, J.R., "Non-negative Dynamical System with Application to Speech and Audio" by Fevotte, C., Le Roux, J. and Hershey, J.R., "Source Localization in Reverberant Environments using Sparse Optimization" by Le Roux, J., Boufounos, P.T., Kang, K. and Hershey, J.R., "A Keypoint Descriptor for Alignment-Free Fingerprint Matching" by Garg, R. and Rane, S., "Transient Disturbance Detection for Power Systems with a General Likelihood Ratio Test" by Song, JX., Sahinoglu, Z. and Guo, J., "Disparity Estimation of Misaligned Images in a Scanline Optimization Framework" by Rzeszutek, R., Tian, D. and Vetro, A., "Screen Content Coding for HEVC Using Edge Modes" by Hu, S., Cohen, R.A., Vetro, A. and Kuo, C.C.J. and "Random Steerable Arrays for Synthetic Aperture Imaging" by Liu, D. and Boufounos, P.T. were presented at the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
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  •  TALK   Communication/computation tradeoffs and other practical considerations in distributed convex optimization
    Date & Time: Thursday, March 21, 2013; 12:00 PM
    Speaker: Konstantinos Tsianos, McGill, Montreal, Canada
    MERL Host: Petros Boufounos
    Research Area: Multimedia
    Brief
    • Distributed algorithms become necessary to employ the computational resources needed for solving the large scale optimization problems that arise in areas such as machine learning,computation biology and others. We study a very general distributed setting where the data is distributed over many machines that can communicate with one another over a network that does not have any specialized communication infrastructure. In this setting the role of the network becomes critical in the performance of a distributed algorithm. From a more theoretical standpoint we discuss two questions: 1) How many nodes should we use for a given problem before communication becomes a bottleneck? and 2) How often should the nodes communicate to one another for the communication cost to be worth the transmission? In addition, we discuss some more practical issue that one needs to consider in implementing algorithms that are asynchronous and robust to communication delays
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  •  NEWS   DCC 2013: publication by Petros T. Boufounos and Shantanu D. Rane
    Date: March 20, 2013
    Where: Data Compression Conference (DCC)
    MERL Contact: Petros Boufounos
    Research Areas: Multimedia, Computational Sensing
    Brief
    • The paper "Efficient Coding of Signal Distances Using Universal Quantized Embeddings" by Boufounos, P.T. and Rane, S. was presented at the Data Compression Conference (DCC)
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  •  NEWS   Journal of Machine Learning Research (JMLR): publication by Petros T. Boufounos and others
    Date: March 1, 2013
    Where: Journal of Machine Learning Research (JMLR)
    MERL Contact: Petros Boufounos
    Research Areas: Multimedia, Computational Sensing
    Brief
    • The article "Greedy Sparsity-Constrained Optimization" by Bahmani, S., Raj, B. and Boufounos, P. was published in Journal of Machine Learning Research (JMLR)
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  •  NEWS   IEEE Signal Processing Magazine: 2 publications by Petros T. Boufounos and Shantanu D. Rane
    Date: February 13, 2013
    Where: IEEE Signal Processing Magazine
    MERL Contact: Petros Boufounos
    Research Area: Multimedia
    Brief
    • The articles "Privacy-Preserving Nearest Neighbor Methods: Comparing Signals without Revealing Them" by Rane, S. and Boufounos, P.T. and "Privacy-preserving Speech Processing: Cryptographic and String-Matching Frameworks Show Promise" by Pathak, M.A., Raj, B., Rane, S. and Samaragdis, P. were published in IEEE Signal Processing Magazine
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  •  NEWS   IEEE Transactions on Information Theory: publication by Petros T. Boufounos and others
    Date: January 23, 2013
    Where: IEEE Transactions on Information Theory
    MERL Contact: Petros Boufounos
    Research Areas: Multimedia, Computational Sensing
    Brief
    • The article "Robust 1-Bit Compressive Sensing via Binary Stable Embeddings of Sparse Vectors" by Jacques, L., Laska, J.N., Boufounos, P.T. and Baraniuk, R.G. was published in IEEE Transactions on Information Theory
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