Patents by Inventor Yakov Chen

Yakov 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 retraining of echo cancellation
    Patent number: 8121260
    Abstract: A method of determining if an echo canceller comprised in a communication channel that is used to transmit at least one tonal signal and characterized by a model echo path of the channel, is acceptably adapted to cancel echoes in the channel, the method comprising: determining a performance measure how well the canceller cancels echoes of at least one test signal characterized by at least one frequency different from a frequency of the at least one tonal signal; and determining if the canceller is acceptably adapted responsive to the measure.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: February 21, 2012
    Assignee: AudioCodes Ltd.
    Inventors: Mark Raifel, Yakov Chen, Eli Shoval
  • Circuit method and system for transmitting information
    Patent number: 7970122
    Abstract: Disclosed is a method and circuit for echo suppression or cancellation. According to some embodiments of the present invention, there is provided a circuit including a Noise-Enhanced-Receiving-Direction unit and Narrow-Band Remover unit or units.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: June 28, 2011
    Assignee: AudioCodes Ltd.
    Inventors: Yakov Chen, Mark Raifel
  • Method and apparatus for using a waveform segment in place of a missing portion of an audio waveform
    Patent number: 7869992
    Abstract: A method for using a waveform segment in place of a missing portion of an audio waveform generated in response to a packet stream encoding portions of the audio waveform, the method comprising: phase matching a trailing portion of the waveform segment with a trailing portion of the audio waveform that follows the missing portion; and adding the phase matched waveform segment to the audio waveform.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: January 11, 2011
    Assignee: AudioCodes Ltd.
    Inventors: Mark Raifel, Guy Shterlich, Yakov Chen
  • Packet loss concealment
    Publication number: 20080294428
    Abstract: A method for using a waveform segment in place of a missing portion of an audio waveform generated in response to a packet stream encoding portions of the audio waveform, the method comprising: phase matching a trailing portion of the waveform segment with a trailing portion of the audio waveform that follows the missing portion; and adding the phase matched waveform segment to the audio waveform.
    Type: Application
    Filed: May 24, 2007
    Publication date: November 27, 2008
    Inventors: Mark Raifel, Guy Shterlich, Yakov Chen
  • Echo cancellation
    Publication number: 20080232577
    Abstract: A method of determining if an echo canceller comprised in a communication channel that is used to transmit at least one tonal signal and characterized by a model echo path of the channel, is acceptably adapted to cancel echoes in the channel, the method comprising: determining a performance measure how well the canceller cancels echoes of at least one test signal characterized by at least one frequency different from a frequency of the at least one tonal signal; and determining if the canceller is acceptably adapted responsive to the measure.
    Type: Application
    Filed: March 22, 2007
    Publication date: September 25, 2008
    Inventors: Mark Raifel, Yakov Chen, Eli Shoval
  • Circuit method and system for transmitting information
    Publication number: 20080101593
    Abstract: Disclosed is a method and circuit for echo suppression or cancellation. According to some embodiments of the present invention, there is provided a circuit including a Noise-Enhanced-Receiving-Direction unit and Narrow-Band Remover unit or units.
    Type: Application
    Filed: October 31, 2006
    Publication date: May 1, 2008
    Inventors: Yakov Chen, Mark Raifel