Patents by Inventor Ranjani Rangarajan

Ranjani Rangarajan 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).

  • Patent number: 10297251
    Abstract: An automatic speech recognition system for a vehicle includes a controller configured to select an acoustic model from a library of acoustic models based on ambient noise in a cabin of the vehicle and operating parameters of the vehicle. The controller is further configured to apply the selected acoustic model to noisy speech to improve recognition of the speech.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: May 21, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Ali Hassani, Scott Andrew Amman, Francois Charette, Brigitte Frances Mora Richardson, Gintaras Vincent Puskorius, An Ji, Ranjani Rangarajan, John Edward Huber
  • Publication number: 20190106069
    Abstract: Method and apparatus are disclosed for monitoring of vehicle window vibrations for voice-command recognition. An example vehicle includes a window, an outer layer, a vibration sensor coupled to the window to detect audio vibrations, an audio actuator coupled to the outer layer to vibrate the outer layer, and a controller. The controller is to detect a voice command from a user via the vibration sensor, identify an audio response based upon the voice command, and emit the audio response to the user via the audio actuator.
    Type: Application
    Filed: October 6, 2017
    Publication date: April 11, 2019
    Inventors: Joshua Wheeler, Scott Andrew Amman, Leah Busch, Ranjani Rangarajan, John Edward Huber
  • Publication number: 20190103027
    Abstract: Method and apparatus are disclosed for accelerometer-based external sound monitoring for voice controlled autonomous parking. An example vehicle includes a body control module, an infotainment head unit, and an autonomy unit. The example body control module communicatively couples to a mobile device. The example infotainment head unit communicatively couples to an accelerometer mounted on a window of the vehicle. The example autonomy unit autonomously parks the vehicle in response to a first key word detected by the accelerometer when (i) a button is activated on the infotainment head unit and (ii) a message from the mobile device is being periodically received.
    Type: Application
    Filed: October 2, 2017
    Publication date: April 4, 2019
    Inventors: Joshua Wheeler, Scott Andrew Amman, Ranjani Rangarajan, Leah Busch, John Edward Huber
  • Publication number: 20190092229
    Abstract: Method and apparatus are disclosed for accelerometer-based external sound monitoring during low speed maneuvers. An example vehicle includes accelerometers affixed to windows of the vehicle, speakers located inside the vehicle, and an infotainment head unit. Each of the speakers is uniquely associated with one of the accelerometers. The infotainment head unit, when a speed of the vehicle satisfies a threshold, selects a zone corresponding to a direction of travel of the vehicle. Additionally, the infotainment head unit plays signals captured by the accelerometers associated with the selected zone on the corresponding speakers.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 28, 2019
    Inventors: Joshua Wheeler, Scott Andrew Amman, John Edward Huber, Leah Busch, Ranjani Rangarajan, Erick Michael Lavoie, Marla Johnston
  • Patent number: 10134415
    Abstract: Method and apparatus are disclosed for determining and accounting for distortions to an audio signal due to the geometric properties of the interior cabin of a vehicle. An example vehicle includes a microphone, a seat having a plurality of seat positions, and a processor. The processor is configured to determine a first seat position corresponding to a point in time at which an audio signal is received, determine a cabin impulse response corresponding to the first seat position, and determine a filtered audio signal based on the cabin impulse response and the audio signal.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: November 20, 2018
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Ranjani Rangarajan, Leah Busch, Joshua Wheeler, Scott Andrew Amman, John Edward Huber
  • Patent number: 10102702
    Abstract: Voice control is extended outside of an automotive vehicle by an access system associated with a door and window. An accelerometer is mounted on the window to generate a vibration signal. A passive entry system generates an unlock standby signal when an authorized user carrying a wireless fob is detected proximate the door. A voice recognizer in the vehicle is activated by the standby signal to scan the vibration signal for a spoken command for opening the door. A door actuator is activated by the voice recognizer when the command is detected.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: October 16, 2018
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Joshua R. Wheeler, Scott A. Amman, Ranjani Rangarajan, Leah N. Busch, An Ji, John E. Huber
  • Publication number: 20180103318
    Abstract: Method and apparatus are disclosed for responding to HVAC-induced vehicle microphone buffeting. An example disclosed vehicle includes a microphone, a speaker, and a buffeting detector. The example microphone is electrically coupled to an input of a voice-activated system. The example speaker is located on a front driver side of the vehicle. The example buffeting detector, when a button is activated, determines a buffeting factor of a signal captured by the microphone. Additionally, the example buffeting detector, in response to the buffeting factor satisfying a threshold, activates a relay to electrically couple the speaker to the input of the voice-activated system.
    Type: Application
    Filed: October 11, 2016
    Publication date: April 12, 2018
    Inventors: Scott Andrew Amman, Alan Norton, Joshua Wheeler, Gintaras Vincent Puskorius, Ranjani Rangarajan
  • Publication number: 20170213549
    Abstract: An automatic speech recognition system for a vehicle includes a controller configured to select an acoustic model from a library of acoustic models based on ambient noise in a cabin of the vehicle and operating parameters of the vehicle. The controller is further configured to apply the selected acoustic model to noisy speech to improve recognition of the speech.
    Type: Application
    Filed: January 21, 2016
    Publication date: July 27, 2017
    Inventors: Ali Hassani, Scott Andrew Amman, Francois Charette, Brigitte Frances Mora Richardson, Gintaras Vincent Puskorius, An Ji, Ranjani Rangarajan, John Edward Huber
  • Publication number: 20170213551
    Abstract: A processor of a vehicle speech recognition system recognizes speech via domain-specific language and acoustic models. The processor further, in response to the acoustic model having a confidence score for recognized speech falling within a predetermined range defined relative to a confidence score for the domain-specific language model, recognizes speech via the acoustic model only.
    Type: Application
    Filed: January 25, 2016
    Publication date: July 27, 2017
    Inventors: An Ji, Scott Andrew Amman, Brigitte Frances Mora Richardson, John Edward Huber, Francois Charette, Ranjani Rangarajan, Gintaras Vincent Puskorius, Ali Hassani
  • Publication number: 20170125038
    Abstract: A controller may be programmed to create a speech utterance set for speech recognition training by, in response to receiving data representing a neutral utterance and parameter values defining signal noise, generating data representing a Lombard effect version of the neutral utterance using a transfer function associated with the parameter values and defining distortion between neutral and Lombard effect versions of a same utterance due to the signal noise.
    Type: Application
    Filed: November 3, 2015
    Publication date: May 4, 2017
    Inventors: Ali Hassani, Scott Andrew Amman, Francois Charette, John Edward Huber, Brigitte Frances Mora Richardson, Gintaras Vincent Puskorius, An Ji, Ranjani Rangarajan