Ecole Polytechnique Federale De Lausanne

Rapt IP Limited

Microsoft Technology Licensing, LLC

Ivan Dokmanic

Martin Vetterli

Owen Drumm

Julien Piot

Mihailo Kolundzija

Danil Korchagin

Ivan Jelev Tashev

Thomas M Soemo

Laurent Daudet

Robin Scheibler

Juri Ranieri

The present invention concerns a method for calibrating an array of receivers (r), each receiver being configured for receiving a signal transmitted by at least one transmitter (s), and echoes of the transmitted signal as reflected by one or more reflective surfaces (w), said method comprising the following steps:

Calibration method and system

A method for modifying an audio scene and/or presenting additional information relevant to the audio scene includes capturing audio signals from the audio scene with a plurality of microphones; outputting an audio signal with a plurality of acoustical transducers; processing the captured audio signals, where the processing comprises one or more of filtering, equalization, echoes processing, and beamforming; separating and distinguishing audio signal sources using the processed audio signals; selecting at least one separated audio signal source; classifying the at least one selected separated audio signal source; retrieving additional information related to the classified audio signal source; and presenting the additional information in a perceptible form.

Method and apparatus for presenting to a user of a wearable apparatus additional information related to an audio scene

Examples are disclosed herein that relate to depth imaging techniques using ultrasound One example provides an ultrasonic depth sensing system configured to, for an image frame, emit an ultrasonic pulse from each of a plurality of transducers, receive a reflection of each ultrasonic pulse at a microphone array, perform transmit beamforming and also receive beamforming computationally after receiving the reflections, form a depth image, and output the depth image for the image frame.

Ultrasonic depth imaging

An acoustic processing method for M acoustic receivers comprising the steps of: Determining a beamforming weight vector with M weights for the M acoustic receivers based on at least one the steering vector of at least one real acoustic source, on steering vectors of image sources of the at least one real acoustic source and on a first matrix depending on the covariance matrix of the noise and/or on at least one interfering sound source, wherein each of the image sources corresponds to one path of the acoustic signal between one of the at least one real source and one of the M acoustic receivers with at least one reflection; and linearly combining the M acoustic signals received at the M acoustic receivers on the basis of the M weights of the beamforming vector.

Optimal acoustic rake receiver

An optical touch-sensitive device has the capability to determine touch locations of multiple simultaneous touch events. The touch events disturb optical beams propagating across the touch sensitive surface. With multi-touch events, a single beam can be disturbed by more than one touch event. In one aspect, a non-linear transform is applied to measurements of the optical beams in order to linearize the effects of multiple touch events on a single optical beam. In another aspect, the effect of known touch events (i.e., reference touches) is modeled in advance, and then unknown touch events are determined with respect to the reference touches.

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Lausanne, Switzerland

Ivan Dokmanic