Patents by Inventor Zhuliang Yu

Zhuliang Yu 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).

  • Publication number: 20110257536
    Abstract: A method for detecting heartbeat and/or respiration is provided. The method provided includes receiving a wave signal, and analyzing the received wave signal using a heartbeat and/or respiratory model, thereby providing a result signal indicating whether the received wave signal represents heartbeat and/or respiration.
    Type: Application
    Filed: September 15, 2008
    Publication date: October 20, 2011
    Inventors: Wee Ser, Zhuliang Yu, Fan Yang
  • Patent number: 7181026
    Abstract: The present invention provides an adaptive directional microphone system for enhancing an acoustic signal from a second direction and for reducing an acoustic signal from at least a first direction different from the second direction, the system comprising: an omni-directional microphone and a directional microphone being arranged in a closely acoustically-coupled way; an adaptive filtering circuit system for generating a first error signal e1(n) corresponding to an acoustic signal in which the acoustic signal from the first direction is reduced; and a post-processing filter system for producing a second error signal e2(n) corresponding to an acoustic signal in which the acoustic signal from the second direction is enhanced as compared to the acoustic signal related to the first error signal e1(n).
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: February 20, 2007
    Inventors: Ming Zhang, Zhuliang Yu, Hui Lan
  • Patent number: 7092529
    Abstract: An adaptive noise canceling system for extracting a desired signal, comprising an adaptive noise cancellation filtering circuit for suppressing noise from a first input signal using a second input signal as a reference signal, and generating an output filtered signal representing the desired signal; and an adaptive noise cancellation controller for receiving the first and second input signals and the output filtered signal, and generating an output control signal for controlling coefficients of at least one adaptive filter of the adaptive noise cancellation filtering circuit, comprising a silence detector unit for detecting whether an acoustical signal is present in the input signals and the output filtered signal, and generating a first output signal which indicates whether the acoustical signal is present; a signal detector unit for detecting whether the desired signal is present in the input signals and the output filtered signal, and generating a second output signal which indicates whether the desired si
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: August 15, 2006
    Assignee: Nanyang Technological University
    Inventors: Zhuliang Yu, Ming Zhang, Hui Lan, Susanto Rahardja
  • Patent number: 6917688
    Abstract: An adaptive noise canceling microphone system for extracting a desired signal, in particular a desired speech signal, comprising two microphones being arranged at a predefined distance from each other; a signal forming system (SFS) being adapted to receive a first and second input signals resulting from sounds received by the two microphones wherein an acoustical signal component in the first input signal is determined, wherein an acoustical signal component in the second input signal is determined, wherein the acoustical signal component in the first input signal is enhanced to generate a speech enhanced signal, and wherein the acoustical signal component in the second input signal is suppressed to generate a speech nulled signal; an adaptive noise cancellation filtering circuit being adapted to receive the speech enhanced signal and the speech nulled signal, wherein the noise in the speech enhanced signal is cancelled using the speech nulled signal as reference, thereby generating an output filtered signal
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: July 12, 2005
    Assignee: Nanyang Technological University
    Inventors: Zhuliang Yu, Wee Ser
  • Publication number: 20040258255
    Abstract: The present invention provides an adaptive directional microphone system for enhancing an acoustic signal from a second direction and for reducing an acoustic signal from at least a first direction different from the second direction, the system comprising:
    Type: Application
    Filed: August 13, 2004
    Publication date: December 23, 2004
    Inventors: Ming Zhang, Zhuliang Yu, Hui Lan
  • Publication number: 20040086137
    Abstract: An adaptive noise canceling system for extracting a desired signal, comprising an adaptive noise cancellation filtering circuit for suppressing noise from a first input signal using a second input signal as a reference signal, and generating an output filtered signal representing the desired signal; and an adaptive noise cancellation controller for receiving the first and second input signals and the output filtered signal, and generating an output control signal for controlling coefficients of at least one adaptive filter of the adaptive noise cancellation filtering circuit, comprising a silence detector unit for detecting whether an acoustical signal is present in the input signals and the output filtered signal, and generating a first output signal which indicates whether the acoustical signal is present; a signal detector unit for detecting whether the desired signal is present in the input signals and the output filtered signal, and generating a second output signal which indicates whether the desired si
    Type: Application
    Filed: November 1, 2002
    Publication date: May 6, 2004
    Inventors: Zhuliang Yu, Ming Zhang, Hui Lan, Susanto Rahardja
  • Publication number: 20040047464
    Abstract: An adaptive noise canceling microphone system for extracting a desired signal, in particular a desired speech signal, comprising two microphones being arranged at a predefined distance from each other; a signal forming system (SFS) being adapted to receive a first and second input signals resulting from sounds received by the two microphones wherein an acoustical signal component in the first input signal is determined, wherein an acoustical signal component in the second input signal is determined, wherein the acoustical signal component in the first input signal is enhanced to generate a speech enhanced signal, and wherein the acoustical signal component in the second input signal is suppressed to generate a speech nulled signal; an adaptive noise cancellation filtering circuit being adapted to receive the speech enhanced signal and the speech nulled signal, wherein the noise in the speech enhanced signal is cancelled using the speech nulled signal as reference, thereby generating an output filtered signal
    Type: Application
    Filed: September 11, 2002
    Publication date: March 11, 2004
    Inventors: Zhuliang Yu, Wee Ser