Abstract: Methods of authenticating a user or speaker are provided. These methods include obtaining an input speech signal and user credentials identifying the user or speaker. The input speech signal includes a single-channel signal or a multi-channel speech signal. The methods further include extracting a speech voiceprint from the input speech signal, and retrieving a reference voiceprint associated to the user credentials. The methods still further include determining a voiceprint correspondence between the speech voiceprint and the reference voiceprint, and authenticating the user or speaker depending on said voiceprint correspondence. The methods yet further include updating the reference voiceprint depending on the speech voiceprint corresponding to the authenticated user or speaker. Computer programs, systems and computing systems are also provided which are suitable for performing said methods of authenticating a user or speaker.

Abstract: Methods of authenticating a user or speaker are provided. These methods include obtaining an input speech signal and user credentials identifying the user or speaker. The input speech signal includes a single-channel signal or a multi-channel speech signal. The methods further include extracting a speech voiceprint from the input speech signal, and retrieving a reference voiceprint associated to the user credentials. The methods still further include determining a voiceprint correspondence between the speech voiceprint and the reference voiceprint, and authenticating the user or speaker depending on said voiceprint correspondence. The methods yet further include updating the reference voiceprint depending on the speech voiceprint corresponding to the authenticated user or speaker. Computer programs, systems and computing systems are also provided which are suitable for performing said methods of authenticating a user or speaker.

Abstract: A microwave imaging system including a microwave antenna array having a transmitting antenna and a plurality of receiving antennas, wherein the transmitting antenna is configured to transmit microwave signals over a range of frequencies so as to illuminate a body part of a patient and wherein the receiving antennas are configured to receive the microwave signals following scattering within the body part. A processor is configured to obtain a set of scattering parameters for the microwave signals over the range of frequencies and, using the scattering parameters, generate an output indicative of the internal structure of the body part to identify a region of interest within the body part. The processor is further configured to classify the region of interest based on a type of tissue therein by analyzing the change of the scattering parameters for the region of interest over the range of frequencies.