Clark School Home UMD

ISR News Story

Carlos Berenstein awarded US Patent 7,424,463

ISR Professor Carlos Berenstein (Math/ISR) is one of five inventors who have been awarded US Patent 7,424,463 for "Denoising Mechanism for Speech Signals using Embedded Thresholds and an Analysis Dictionary."

Along with Berenstein, the inventors include ISR alumni David Walnut and Domenico Napoletani, along with Timothy Sauer and Daniele Struppa.

The invention is a denoising mechanism for signal processing that uses chosen signal classes and selected analysis dictionaries. The chosen signal class includes a collection of signals. The analysis dictionaries describe signals. The embedding threshold value is initially determined for a training set of signals in the chosen signal class. The update signal is initialized with a signal corrupted by noise. The estimate calculated by: computing coefficients for the updated signal using the analysis dictionaries; computing an embedding index for each of the path(s); extracting a coefficient subset from coefficients for the path(s) whose embedding index exceeds an embedding threshold; adding a coefficient subset to a coefficient collection; generating a partial estimate using the coefficient collection; creating an attenuated partial estimate by attenuating the partial estimate by an attenuation factor; updating the updated signal by subtracting the attenuated partial estimate from the updated signal; and adding the attenuated partial estimate to the estimate.

You can view ISR patents at any time on our patents page.

September 12, 2008

Prev   Next



Current Headlines

ECE Names 2018-2019 Distinguished Dissertation Fellows

Solar evaporator offers a fresh route to fresh water

Professor: Snow melt drives not only spring flooding, but summer droughts

Algorithms and Autonomous Discovery

Machine Learning's Translational Medicine

Espy-Wilson Honored at UMD’s First to ADVANCE Celebration

Timothy J. Regan to deliver Kirlin/Whiting-Turner Lecture on April 18

Former ISR Visiting Scientist Takeo Yokoyama stops in

Measuring Change in the Atmosphere

Engineering a Testudo

News Resources

Return to Newsroom

Search News

Archived News

Events Resources

Events Calendar