Patents by Inventor Raphael Nicolas GREFF

Raphael Nicolas GREFF 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: 10536793
    Abstract: The invention relates to a method for reproducing spatially distributed sounds of a multichannel audio signal comprising: receiving time-dependent input audio signals and performing a time-frequency transform; for each time-frequency tile, determining an active directional vector {right arrow over (Da)} and a reactive directional vector {right arrow over (Dr)} from time-frequency representations of different input channels for said time-frequency tile, determining positions of virtual sound sources (VS1, VS2, VS3) with respect to the reference listening point (O) from the active directional vector {right arrow over (Da)} and the reactive directional vector {right arrow over (Dr)}, and determining frequency signal values to each virtual sound sources (VS1, VS2, VS3), and distributing time-frequency signal values of said virtual sound sources to electroacoustic transducers on the basis of a comparison between the positions of the virtual sound sources in the virtual spatial configuration and the actual position
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: January 14, 2020
    Assignee: A-VOLUTE
    Inventors: Raphael Nicolas Greff, Hong Cong Tuyen Pham
  • Publication number: 20190208349
    Abstract: The invention relates to a method for reproducing spatially distributed sounds of a multichannel audio signal comprising: receiving time-dependent input audio signals and performing a time-frequency transform; for each time-frequency tile, determining an active directional vector {right arrow over (Da)} and a reactive directional vector {right arrow over (Dr)} from time-frequency representations of different input channels for said time-frequency tile, determining positions of virtual sound sources (VS1, VS2, VS3) with respect to the reference listening point (O) from the active directional vector {right arrow over (Da)} and the reactive directional vector {right arrow over (Dr)}, and determining frequency signal values to each virtual sound sources (VS1, VS2, VS3), and distributing time-frequency signal values of said virtual sound sources to electroacoustic transducers on the basis of a comparison between the positions of the virtual sound sources in the virtual spatial configuration and the actual position
    Type: Application
    Filed: September 19, 2017
    Publication date: July 4, 2019
    Inventors: Raphael Nicolas GREFF, Hong Cong Tuyen PHAM
  • Patent number: 10085108
    Abstract: A method for visualizing a directional sound activity of a multichannel audio signal, wherein the multichannel audio signal comprises time-dependent input audio signals, comprising determining a directional sound activity vector from virtual sound sources determined from an active directional vector and a reactive directional vector determined from time-frequency representations of different input audio signals for each one of a plurality of time-frequency tiles; determining a contribution of each one of said directional sound activity vectors within sub-divisions of space on the basis of directivity information related to each sub-divisions of space and directional sound activity level within said sub-division of space by summing said contributions; displaying a visualization of the directional sound activity of the multichannel audio signal by a graphical representation of directional sound activity level within said sub-division of space.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: September 25, 2018
    Assignee: A-VOLUTE
    Inventors: Raphael Nicolas Greff, Hong Cong Tuyen Pham
  • Publication number: 20180084367
    Abstract: A method for visualizing a directional sound activity of a multichannel audio signal, wherein the multichannel audio signal comprises time-dependent input audio signals, comprising determining a directional sound activity vector from virtual sound sources determined from an active directional vector and a reactive directional vector determined from time-frequency representations of different input audio signals for each one of a plurality of time-frequency tiles; determining a contribution of each one of said directional sound activity vectors within sub-divisions of space on the basis of directivity information related to each sub-divisions of space and directional sound activity level within said sub-division of space by summing said contributions; displaying a visualization of the directional sound activity of the multichannel audio signal by a graphical representation of directional sound activity level within said sub-division of space.
    Type: Application
    Filed: September 19, 2017
    Publication date: March 22, 2018
    Inventors: Raphael Nicolas GREFF, Hong Cong Tuyen PHAM
  • Publication number: 20180084364
    Abstract: A method for visualizing a directional sound activity of a multichannel audio signal, wherein the multichannel audio signal comprises time-dependent input audio signals, comprising determining a directional sound activity vector from virtual sound sources determined from an active directional vector and a reactive directional vector determined from time-frequency representations of different input audio signals for each one of a plurality of time-frequency tiles; determining a contribution of each one of said directional sound activity vectors within sub-divisions of space on the basis of directivity information related to each sub-divisions of space and directional sound activity level within said sub-division of space by summing said contributions; displaying a visualization of the directional sound activity of the multichannel audio signal by a graphical representation of directional sound activity level within said sub-division of space.
    Type: Application
    Filed: September 18, 2017
    Publication date: March 22, 2018
    Inventors: Raphael Nicolas GREFF, Hong Cong Tuyen PHAM
  • Patent number: 9232337
    Abstract: The invention relates to a method for visualizing a directional sound activity of a multichannel audio signal, comprising: receiving input audio channels, spatial information being associated with each one of said channel, performing a time-frequency transformation of said input audio channels, for each one of a plurality of frequency sub-bands, determining a directional sound activity vector from said transformed input audio channels, determining a contribution of each one of said directional sound activity vectors within sub-divisions of space on the basis of directivity information related to each sub-divisions of space, for each sub-division of space, determining directional sound activity level within said sub-division of space by summing said contributions within said sub-division of space, displaying a visualization of the directional sound activity of the multichannel audio signal by a graphical representation of directional sound activity level within said sub-division of space.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: January 5, 2016
    Assignee: A-VOLUTE
    Inventors: Raphaël Nicolas Greff, Hong Cong Tuyen Pham
  • Publication number: 20140177844
    Abstract: The invention relates to a method for visualizing a directional sound activity of a multichannel audio signal, comprising: receiving input audio channels, spatial information being associated with each one of said channel, performing a time-frequency transformation of said input audio channels, for each one of a plurality of frequency sub-bands, determining a directional sound activity vector from said transformed input audio channels, determining a contribution of each one of said directional sound activity vectors within sub-divisions of space on the basis of directivity information related to each sub-divisions of space, for each sub-division of space, determining directional sound activity level within said sub-division of space by summing said contributions within said sub-division of space, displaying a visualization of the directional sound activity of the multichannel audio signal by a graphical representation of directional sound activity level within said sub-division of space.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Inventors: Raphaël Nicolas GREFF, Hong Cong Tuyen Pham