Knuedge, Inc.

The Intellisis Corporation

Friday Harbor LLC

Derrick Raymond Roos

David C Bradley

Robert Nicholas Hilton

Daniel S Goldin

Nicholas K Fisher

Eric Wiewiora

Rodney Gateau

Robert N Hilton

In one aspect, a method includes receiving an identifier; obtaining a plurality of prompts using the identifier, wherein a first prompt corresponds to a first character of an access code, and a second prompt corresponds to a second character of the access code; causing the first prompt and the second prompt to be presented on a display at locations corresponding to a first alternative; causing third prompts and fourth prompts to be presented on the display at locations corresponding to a second alternative; receiving an audio signal comprising speech spoken by a user; and determining whether the audio signal comprises the user speaking the first prompt followed by the second prompt.

Access code obfuscation using speech input

Systems and methods to authenticate and verify user access replace the digits of a personal identification number (PIN) of a particular user with prompted randomized words that are to be uttered by an unidentified user. By virtue of this replacement, the PIN remains secret. A known speaker provides voice samples to the system in advance. The words uttered by the unidentified user (in response to the prompted words being displayed) correspond to digits. The uttered words are checked against the PIN, and are used to verify if the unidentified user's voice matches the voice of the known speaker.

System and methods for personal identification number authentication and verification

A system and method are provided for processing sound signals. The processing may include identifying individual harmonic sounds represented in sound signals, determining sound parameters of harmonic sounds, classifying harmonic sounds according to source, and/or other processing. The processing may include transforming the sound signals (or portions thereof) into a space which expresses a transform coefficient as a function of frequency and chirp rate. This may facilitate leveraging of the fact that the individual harmonics of a single harmonic sound may have a common pitch velocity (which is related to the chirp rate) across all of its harmonics in order to distinguish an the harmonic sound from other sounds (harmonic and/or non-harmonic) and/or noise.

System and method for processing sound signals implementing a spectral motion transform

A system and method may be provided to segment and/or classify an audio signal from transformed audio information. Transformed audio information representing a sound may be obtained. The transformed audio information may specify magnitude of a coefficient related to energy amplitude as a function of frequency for the audio signal and time. Features associated with the audio signal may be obtained from the transformed audio information. Individual ones of the features may be associated with a feature score relative to a predetermined speaker model. An aggregate score may be obtained based on the feature scores according to a weighting scheme. The weighting scheme may be associated with a noise and/or SNR estimation. The aggregate score may be used for segmentation to identify portions of the audio signal containing speech of one or more different speakers. For classification, the aggregate score may be used to determine a likely speaker model to identify a source of the sound in the audio signal.

Systems and methods for segmenting and/or classifying an audio signal from transformed audio information

A system and method may be configured to process an audio signal. The system and method may track pitch, chirp rate, and/or harmonic envelope across the audio signal, may reconstruct sound represented in the audio signal, and/or may segment or classify the audio signal. A transform may be performed on the audio signal to place the audio signal in a frequency chirp domain that enhances the sound parameter tracking, reconstruction, and/or classification.

System and method of processing a sound signal including transforming the sound signal into a frequency-chirp domain

A system and method may be configured to analyze audio information derived from an audio signal. The system and method may track sound pitch across the audio signal. The tracking of pitch across the audio signal may take into account change in pitch by determining at individual time sample windows in the signal duration an estimated pitch and an estimated fractional chirp rate of the harmonics at the estimated pitch. The estimated pitch and the estimated fractional chirp rate may then be implemented to determine an estimated pitch for another time sample window in the signal duration with an enhanced accuracy and/or precision.

Growing community of inventors

San Diego, CA, United States of America

Derrick Raymond Roos