Shankar Thagadur Shivappa

US Patent:

20120214544, Aug 23, 2012

Filed:

Feb 23, 2011

Appl. No.:

13/033372

Inventors:

Shankar Thagadur Shivappa - Beaverton OR, US
Tony F. Rodriguez - Portland OR, US

International Classification:

H04R 3/00
H04M 1/00
G10L 19/00
H04R 29/00

US Classification:

4555561, 381 92, 381 58, 704500

Abstract:

A positioning network comprises an array of signal sources that transmit signals with unique characteristics that are detectable in signals captured through a sensor on a mobile device, such as a microphone of a mobile phone handset. Through signal processing of the captured signal, the positioning system distinguishes these characteristics to identify distinct sources and their corresponding coordinates. A position calculator takes these coordinates together with other attributes derived from the received signals from distinct sources, such as time of arrival or signal strength, to calculate coordinates of the mobile device. A layered protocol is used to introduce distinguishing characteristics in the source signals. This approach enables the use of low cost components to integrate a positioning network on equipment used for other functions, such as audio playback equipment at shopping malls and other venues where location based services are desired.

US Patent:

20120214515, Aug 23, 2012

Filed:

Aug 1, 2011

Appl. No.:

13/195715

Inventors:

Bruce L. Davis - Lake Oswego OR, US
Tony F. Rodriguez - Portland OR, US
Shankar Thagadur Shivappa - Beaverton OR, US

International Classification:

H04W 4/02

US Classification:

4554563, 4554566

Abstract:

A method for indoor navigation in a venue derives positioning of a mobile device based on sounds captured by the microphone of the mobile device from the ambient environment. It is particularly suited to operate on smartphones, where the sounds are captured using microphone that captures sounds in a frequency range of human hearing. The method determines a position of the mobile device in the venue based on identification of the audio signal, monitors the position of the mobile device, and generates a position based alert on an output device of the mobile device when the position of the mobile device is within a pre-determined position associated with the position based alert.

US Patent:

20220386059, Dec 1, 2022

Filed:

May 27, 2021

Appl. No.:

17/332813

Inventors:

- San Diego CA, US
Shankar THAGADUR SHIVAPPA - San Diego CA, US

International Classification:

H04S 7/00
H04R 1/22

Abstract:

A device includes a memory configured to store instructions. The device also includes a processor configured to execute the instructions to obtain spatial audio data representing audio from one or more sound sources. The processor is also configured to execute the instructions to generate first directional audio data based on the spatial audio data. The first directional audio data corresponds to a first arrangement of the one or more sound sources relative to an audio output device. The processor is further configured to generate second directional audio data based on the spatial audio data. The second directional audio data corresponds to a second arrangement of the one or more sound sources relative to the audio output device. The second arrangement is distinct from the first arrangement. The processor is also configured to generate an output stream based on the first directional audio data and the second directional audio data.

US Patent:

20220386060, Dec 1, 2022

Filed:

Oct 29, 2020

Appl. No.:

17/755578

Inventors:

- San Diego CA, US
Shankar THAGADUR SHIVAPPA - San Diego CA, US
Jason FILOS - San Diego CA, US
Siddhartha Goutham SWAMINATHAN - San Diego CA, US
Ferdinando OLIVIERI - San Diego CA, US

International Classification:

H04S 7/00

Abstract:

Methods, systems, computer-readable media, and apparatuses for manipulating a soundfield are presented. Some configurations include receiving a bitstream that comprises metadata and a soundfield description; parsing the metadata to obtain an effect identifier and at least one effect parameter value; and applying, to the soundfield description, an effect identified by the effect identifier. The applying may include using the at least one effect parameter value to apply the identified effect to the soundfield description.

US Patent:

20220335959, Oct 20, 2022

Filed:

Nov 22, 2021

Appl. No.:

17/532884

Inventors:

- Beaverton OR, US
Brett A. Bradley - Portland OR, US
Yang Bai - Beaverton OR, US
Shankar Thagadur Shivappa - San Diego CA, US
Ajith Kamath - Beaverton OR, US
Aparna Gurijala - Port Coquilam, CN
Tomas Filler - Tigard OR, US
David A. Cushman - McMinnville OR, US

International Classification:

G10L 19/018
G10L 19/02

Abstract:

Audio signal processing enhances audio watermark embedding and detecting processes. Audio signal processes include audio classification and adapting watermark embedding and detecting based on classification. Advances in audio watermark design include adaptive watermark signal structure data protocols, perceptual models, and insertion methods. Perceptual and robustness evaluation is integrated into audio watermark embedding to optimize audio quality relative the original signal, and to optimize robustness or data capacity. These methods are applied to audio segments in audio embedder and detector configurations to support real time operation. Feature extraction and matching are also used to adapt audio watermark embedding and detecting.

US Patent:

20220246133, Aug 4, 2022

Filed:

Feb 3, 2021

Appl. No.:

17/166250

Inventors:

- San Diego CA, US
Reid WESTBURG - Del Mar CA, US
Shankar THAGADUR SHIVAPPA - San Diego CA, US

International Classification:

G10L 13/08
G10L 13/027
H04N 7/15
H04N 7/14

Abstract:

A device for communication includes one or more processors configured to receive, during an online meeting, a speech audio stream representing speech of a first user. The one or more processors are also configured to receive a text stream representing the speech of the first user. The one or more processors are further configured to selectively generate an output based on the text stream in response to an interruption in the speech audio stream.

US Patent:

20220199100, Jun 23, 2022

Filed:

Dec 21, 2020

Appl. No.:

17/128544

Inventors:

- San Diego CA, US
Hannes PESSENTHEINER - Graz, AT
Shuhua ZHANG - San Diego CA, US
Sanghyun CHI - San Diego CA, US
Erik VISSER - San Diego CA, US
Shankar THAGADUR SHIVAPPA - San Diego CA, US

International Classification:

G10L 21/0232
H04R 1/40
H04R 3/00
H04S 7/00
H04S 3/00
G10L 25/51
G10L 21/0324

Abstract:

A device includes one or more processors configured to obtain audio signals representing sound captured by at least three microphones and determine spatial audio data based on the audio signals. The one or more processors are further configured to determine a metric indicative of wind noise in the audio signals. The metric is based on a comparison of a first value and a second value. The first value corresponds to an aggregate signal based on the spatial audio data, and the second value corresponds to a differential signal based on the spatial audio data.

US Patent:

20220201395, Jun 23, 2022

Filed:

Dec 18, 2020

Appl. No.:

17/127421

Inventors:

- San Diego CA, US
Vasudev NAYAK - San Diego CA, US
Shankar THAGADUR SHIVAPPA - San Diego CA, US
Isaac Garcia MUNOZ - San Diego CA, US
Sanghyun CHI - San Diego CA, US
Erik VISSER - San Diego CA, US

International Classification:

H04R 3/00
H03G 3/30
G02B 27/00
G06K 9/00

Abstract:

In an aspect, a lens is zoomed in to create a zoomed lens. Lens data associated with the lens includes a direction of the lens relative to an object in a field-of-view of the zoomed lens and a magnification of the object resulting from the zoomed lens. An array of microphones capture audio signals including audio produced by the object and interference produced by other objects. The audio signals are processed to identify a directional component associated with the audio produced by the object and three orthogonal components associated with the interference produced by the other objects. Stereo beamforming is used to increase a magnitude of the directional component (relative to the interference) while retaining a binaural nature of the audio signals. The increase in magnitude of the directional component is based on an amount of the magnification provided by the zoomed lens to the object.