David M Corsello, 40Boston, MA

2019021, Jul 11, 2019

Dec 28, 2018

16/235854

- Calabasas CA, US
Martin Walsh - Scotts Valley CA, US
Guangji Shi - San Jose CA, US
David Corsello - Redwood City CA, US

H04S 7/00
H04S 3/00
G10L 19/008
G10L 19/16

The method and apparatus described herein make use of multiple sets of head related transfer functions (HRTFs) that have been synthesized or measured at various distances from a reference head, spanning from the near-field to the boundary of the far-field. Additional synthetic or measured transfer functions maybe used to extend to the interior of the head, i.e., for distances closer than near-field. In addition, the relative distance-related gains of each set of HRTFs are normalized to the far-field HRTF gains.

2018010, Apr 12, 2018

Oct 11, 2016

15/290392

- Calabasas CA, US
David Corsello - Redwood City CA, US
Guangji Shi - San Jose CA, US

DTS, Inc. - Calabasas CA

H04R 3/04
H04R 29/00
H04R 3/14
H03G 3/30

A GPEQ filter and tuning methods for asymmetric transaural audio reproduction on mobile consumer devices. The GPEQ filter includes an asymmetric FIR filter bank configured to normalize the magnitude responses of at least two audio speakers to a target response above a low frequency cross-over of the audio speakers as reproduced at the listener position and a symmetric IIR filter bank component configured to high pass filter above the low frequency cross-over and equalize the magnitude responses of the at least two audio speakers. In some embodiments the FIR filter bank is configured to normalize the group delay of the audio channels and in some embodiments the IIR filter bank includes an asymmetric IIR filter bank component configured to correct any residual asymmetry in the magnitude responses of the at least two audio speakers. Phase preservation may be accomplished using phase-balanced or phase-compensated IIR filter sections.

2017036, Dec 21, 2017

Jun 16, 2017

15/625937

- Calabasas CA, US
Martin Walsh - Scotts Valley CA, US
Guangji Shi - San Jose CA, US
David Corsello - Redwood City CA, US

H04S 7/00
G10L 19/008
G10L 19/16
H04S 3/00

The methods and apparatus described herein optimally represent full D audio mixes (e.g., azimuth, elevation, and depth) as “sound scenes” in which the decoding process facilitates head tracking. Sound scene rendering can be modified for the listener's orientation (e.g., yaw, pitch, roll) and D position (e.g., x, y, z). This provides the ability to treat sound scene source positions as D positions instead of being restricted to positions relative to the listener. Sound scene rendering can be augmented by encoding depth to a source directly. This provides the ability to modify the transmission format and panning equations to support adding depth indicators during content production. Unlike typical methods that apply depth cues such as loudness and reverberation changes in the mix, this method would enable recovering the distance of a source in the mix so that it can be rendered for the final playback capabilities rather than those on the production side.

2017036, Dec 21, 2017

Jun 16, 2017

15/625913

Edward Stein - Aptos CA, US
Martin Walsh - Scotts Valley CA, US
Guangji Shi - San Jose CA, US
David Corsello - Redwood City CA, US

H04S 7/00
H04S 3/00

The method and apparatus described herein make use of multiple sets of head related transfer functions (HRTFs) that have been synthesized or measured at various distances from a reference head, spanning from the near-field to the boundary of the far-field. Additional synthetic or measured transfer functions maybe used to extend to the interior of the head, i.e., for distances closer than near-field. In addition, the relative distance-related gains of each set of HRTFs are normalized to the far-field HRTF gains.

2017036, Dec 21, 2017

Jun 16, 2017

15/625927

EDWARD STEIN - APTOS CA, US
MARTIN WALSH - SCOTTS VALLEY CA, US
GUANGJI SHI - SAN JOSE CA, US
DAVID CORSELLO - REDWOOD CITY CA, US

H04S 7/00
H04S 3/00

The methods and apparatus described herein optimally represent full 3D audio mixes (e.g., azimuth, elevation, and depth) as “sound scenes” in which the decoding process facilitates head tracking. Sound scene rendering can be performed for the listener's orientation (e.g., yaw, pitch, roll) and 3D position (e.g., x, y, z), and can be modified for a change in the listener's orientation or 3D position. As described below, the ability to render an audio object in both the near-field and far-field enables the ability to fully render depth of not just objects, but any spatial audio mix decoded with active steering/panning, such as Ambisonics, matrix encoding, etc., thereby enabling full translational head tracking (e.g., user movement) beyond simple rotation in the horizontal plane, or 6-degrees-of-freedom (6-DOF) tracking and rendering.