Recent Patents in Signal Processing - November 2010

US 7,822,498, "Using a loudness-level-reference segment of audio to normalize relative audio levels among different audio files when combining content of the audio files", by W. Charoenruengkit, F. Fado and K. Nguyen, filed 10 August 2006, issued 26 October 2010, assigned to IBM Corporation (Armonk, NY).

US 7,822,210, "Configurable recursive digital filter for processing television audio signals", by M. Barnhill, filed 16 August 2005, issued 26 October 2010, assigned to THAT Corporation (Milford, MA).US 7,820,900, "System and method for sound recognition", by K. Lemons, filed 21 April 2008, issued 26 October 2010, assigned to Master Key, LLC (Indianapolis, IN).

US 7,818,184, "Patient medical fluid parameter data processing system", by M. Penny, A. Alpert and R. Monteleone filed 10 April 2003, issued 19 October 2010, assigned to Draeger Medical Systems, Inc. (Andover, MA).

US 7,818,077, "Encoding spatial data in a multi-channel sound file for an object in a virtual environment", by K. Bailey, filed 6 May 2004, issued 19 October 2010, assigned to Valve Corporation (Bellevue, WA).

US 7,818,076, "Method and apparatus for multi-system remote surgical navigation from a single control center", by R. Viswanathan, filed 7 February 2007, issued 19 October 2010, assigned to Stereotaxis, Inc. (St. Louis, MO).

US 7,813,823, "Computer audio system and method", by A. Torrini, K. Shkolnyy and A. Wheeler filed 17 January 2006, issued 12 October 2010, assigned to Sigmatel, Inc. (Austin, TX).

US 7,809,452, "Delay management of presentation output system and method", by O. Logvinov, M. Macaluso and B. Ebert filed 23 February 2006, issued 5 October 2010, assigned to Leviton Manufacturing Co., Inc. (Little Neck, NY) and Arkados, Inc. (North Plainfield, NJ).

US 7,821,448, "Constant altitude plan position indicator display for multiple radars", by P. Mahapatra and V. Makkapati filed 18 August 2005, issued 26 October 2010, assigned to Honeywell International., Inc. (Morristown, NJ).

Interested in sharing a recent patent you know? Please contact Associate Editor Dr. Shantanu Rane at <rane AT merl.com> with the patent information related to signal processing. We are particularly interested in patents by SPS members issued within the past six months.