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

Prof. Sang Bok Lee appointed director of Maryland NanoCenter

ECE Inducts Three New Distinguished Alumni

UMD Risk Expert Contributes to National Academies Report on National Drone Policy

Ephremides leads new NSF Age of Information project

Barg is principal investigator for new NSF information recovery award

Northrop Grumman contributes research funding for third consecutive year

Simon, Abshire, Elhilali give invited talks

Best paper award for Bergbreiter, St. Pierre, Gosrich at Hilton Head workshop

Center for Disaster Resilience Affiliate Offers Insight on Ellicott City Future Plans

Study validates face recognition experts, but shows humans perform best with an AI partner

News Resources

Return to Newsroom

Search News

Archived News

Events Resources

Events Calendar