Patents by Inventor LU-MING CHEN

LU-MING CHEN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for mitigating feedback in a digital radio receiver
    Patent number: 9749021
    Abstract: Embodiments of an acoustic feedback suppressor determine the energy in each of a plurality of frequency bands of frames of an audio signal. The energy in each of the plurality of frequency bands is compared to characteristic of human voice to determine that a present frame contains content that is not likely human voice and exhibits a characteristic of feedback. Upon determining that feedback is occurring, an adaptive gain reduction is applied to the band in which feedback is suspected to be occurring.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: August 29, 2017
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Yi Gao, Lu-Ming Chen, William M Kushner, Yu Liu, Li Xiao
  • METHOD AND APPARATUS FOR MITIGATING FEEDBACK IN A DIGITAL RADIO RECEIVER
    Publication number: 20150372723
    Abstract: Embodiments of an acoustic feedback suppressor determine the energy in each of a plurality of frequency bands of frames of an audio signal. The energy in each of the plurality of frequency bands is compared to characteristic of human voice to determine that a present frame contains content that is not likely human voice and exhibits a characteristic of feedback. Upon determining that feedback is occurring, an adaptive gain reduction is applied to the band in which feedback is suspected to be occurring.
    Type: Application
    Filed: December 18, 2012
    Publication date: December 24, 2015
    Inventors: YI GAO, LU-MING CHEN, WILLIAM M KUSHNER, YU LIU, LI XIAO