Patents by Inventor Ernan Liu

Ernan Liu 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).

  • SYSTEMS, METHODS, AND APPARATUS FOR VOICE ACTIVITY DETECTION
    Publication number: 20120130713
    Abstract: Systems, methods, apparatus, and machine-readable media for voice activity detection in a single-channel or multichannel audio signal are disclosed.
    Type: Application
    Filed: October 24, 2011
    Publication date: May 24, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Jongwon Shin, Erik Visser, Ian Ernan Liu
  • SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR ORIENTATION-SENSITIVE RECORDING CONTROL
    Publication number: 20120128175
    Abstract: Systems, methods, apparatus, and machine-readable media for orientation-sensitive selection and/or preservation of a recording direction using a multi-microphone setup are described.
    Type: Application
    Filed: October 24, 2011
    Publication date: May 24, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Erik Visser, Ian Ernan Liu, Dinesh Ramakrishnan, Lae-Hoon Kim, Pei Xiang
  • THREE-DIMENSIONAL SOUND CAPTURING AND REPRODUCING WITH MULTI-MICROPHONES
    Publication number: 20120128160
    Abstract: Systems, methods, apparatus, and machine-readable media for three-dimensional sound recording and reproduction using a multi-microphone setup are described.
    Type: Application
    Filed: October 24, 2011
    Publication date: May 24, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Lae-Hoon Kim, Erik Visser, Pei Xiang, Ian Ernan Liu, Dinesh Ramakrishnan
  • MICROPHONE ARRAY SUBSET SELECTION FOR ROBUST NOISE REDUCTION
    Publication number: 20120051548
    Abstract: A disclosed method selects a plurality of fewer than all of the channels of a multichannel signal, based on information relating to the direction of arrival of at least one frequency component of the multichannel signal.
    Type: Application
    Filed: February 17, 2011
    Publication date: March 1, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Erik Visser, Ernan Liu
  • SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR MULTI-MICROPHONE LOCATION-SELECTIVE PROCESSING
    Publication number: 20120020485
    Abstract: A multi-microphone system performs location-selective processing of an acoustic signal, wherein source location is indicated by directions of arrival relative to microphone pairs at opposite sides of a midsagittal plane of a user's head.
    Type: Application
    Filed: July 25, 2011
    Publication date: January 26, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: ERIK VISSER, IAN ERNAN LIU
  • SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR PROCESSING OF SPEECH SIGNALS USING HEAD-MOUNTED MICROPHONE PAIR
    Publication number: 20110288860
    Abstract: A noise cancelling headset for voice communications contains a microphone at each of the user's ears and a voice microphone. The headset shares the use of the ear microphones for improving signal-to-noise ratio on both the transmit path and the receive path.
    Type: Application
    Filed: May 19, 2011
    Publication date: November 24, 2011
    Applicant: QUALCOMM INCORPORATED
    Inventors: Andre Gustavo Pucci Schevciw, Erik Visser, Dinesh Ramakrishnan, Ian Ernan Liu, Ren Li, Brian Momeyer, Hyun Jin Park, Louis D. Oliveira
  • SYSTEMS, METHODS, AND APPARATUS FOR SPEECH FEATURE DETECTION
    Publication number: 20110264447
    Abstract: Implementations and applications are disclosed for detection of a transition in a voice activity state of an audio signal, based on a change in energy that is consistent in time across a range of frequencies of the signal.
    Type: Application
    Filed: April 22, 2011
    Publication date: October 27, 2011
    Applicant: QUALCOMM Incorporated
    Inventors: Erik Visser, Ian Ernan Liu, Jongwon Shin
  • SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR COHERENCE DETECTION
    Publication number: 20110038489
    Abstract: Based on phase differences between corresponding frequency components of different channels of a multichannel signal, a measure of directional coherency is calculated. Application of such a measure to voice activity detection and noise reduction are also disclosed.
    Type: Application
    Filed: October 23, 2009
    Publication date: February 17, 2011
    Applicant: QUALCOMM Incorporated
    Inventors: Erik Visser, Ian Ernan Liu
  • SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR PHASE-BASED PROCESSING OF MULTICHANNEL SIGNAL
    Publication number: 20100323652
    Abstract: Phase-based processing of a multichannel signal, and applications including proximity detection, are disclosed.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 23, 2010
    Applicant: QUALCOMM Incorporated
    Inventors: Erik Visser, Ernan Liu