Patents Assigned to Cedar Audio Limited
  • METHOD AND APPARATUS FOR AUDIO SIGNAL PROCESSING
    Publication number: 20110235823
    Abstract: A sampled digital audio signal is displayed on a spectrogram, in terms of frequency vs. time. An unwanted noise in the signal is visible in the spectrogram and the portion of the signal containing the unwanted noise can be selected using time and frequency constraints. An estimate for the signal within the selected portion is then interpolated on the basis of desired portions of the signal outside the time constraints defining the selected portion.
    Type: Application
    Filed: June 6, 2011
    Publication date: September 29, 2011
    Applicant: CEDAR AUDIO LIMITED
    Inventor: DAVID ANTHONY BETTS
  • Method and apparatus for audio signal processing
    Patent number: 7978862
    Abstract: A sampled digital audio signal is displayed on a spectrogram, in terms of frequency vs. time. An unwanted noise in the signal is visible in the spectrogram and the portion of the signal containing the unwanted noise can be selected using time and frequency constraints. An estimate for the signal within the selected portion is then interpolated on the basis of desired portions of the signal outside the time constraints defining the selected portion. The interpolated estimate can then be used to attenuate or remove the unwanted sound.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: July 12, 2011
    Assignee: Cedar Audio Limited
    Inventor: David Anthony Betts