Nokia Corporation

Nokia Technologies Oy

Intel Corporation

Microsoft Technology Licensing, LLC

Wsou Investments, LLC

Anu Huttunen

Andrey Vladimirovich Belogolovy

Alan Edward Waltho

Jorma Makinen

Mikhail Yurievich Lyakh

Risto Heikki Kaunisto

Mari Partio

Miikka Tapani Vilermo

Mikko Tapio Tammi

Ari Juhani Koski

Ville Mikael Myllyla

Antti Heikki Tapio Sassi

Riitta Niemisto

Jorma Mäkinen

Jukka Vartiainen

Visa Koivunen

Jari Petteri Sjoberg

Juha Pihlaja

Tero Takala

Niko Kiukkonen

Aarno Tapio Pärssinen

Jari Henrik Junell

Risto Heikki Sakari Kaunisto

Jarmo Rafael Lundén

Miikka Vilermo

Mikhail Y Lyakh

Andrey V Belogolovy

Alan E Waltho

An apparatus including at least one processor and at least one memory including computer program code configured to: when the apparatus is in a voice phone call mode of sound capture, output a signal from a first microphone as a primary speech signal, and select one or more second microphones to output a noise reduction signal, where the apparatus comprises at least two of the second microphones, and where selection of the one or more second microphones is based at least partially upon a determined use of the apparatus being either a handportable or an integrated handsfree use; and/or when the apparatus is in a multi-media mode of sound capture select one or more of the microphones to output audio signals based upon both a determined type of sound capture feature being used by the apparatus and based upon a determined orientation of the apparatus.

Audio capture with multiple microphones

An apparatus for providing directional audio capture may include a processor and memory storing executable computer program code that cause the apparatus to at least perform operations including assigning at least one beam direction, among a plurality of beam directions, in which to direct directionality of an output signal of one or more microphones. The computer program code may further cause the apparatus to divide microphone signals of the microphones into selected frequency subbands wherein an analysis performed. The computer program code may further cause the apparatus to select at least one set of microphones of the apparatus for selected frequency subbands. The computer program code may further cause the apparatus to optimize the assigned at least one beam direction by adjusting a beamformer parameter(s) based on the selected set of microphones and at least one of the selected frequency subbands. Corresponding methods and computer program products are also provided.

Methods, apparatuses and computer program products for facilitating directional audio capture with multiple microphones

An audio processing scheme is described. In an example, an apparatus comprises: at least two acoustic sensors through which audio content is received; at least one other sensor; an audio processor connected to the sensors and configured to receive audio information from the acoustic sensors and other information from the other sensor. The audio processor is configured to determine a use case of the apparatus based on the audio information and the other information. The audio processor is configured to adjust at least one audio processing scheme for the apparatus based on the determined use case. In other examples, a method and a computer program product are described.

Use case dependent audio processing

An apparatus comprising: an input configured to receive at least two microphone signals associated with at least one acoustic source; an audio source determiner configured to determine from at least part of the at least two microphone signals at least one audio source based on the at least one acoustic source; an audio source direction determiner configured to determine at least one direction associated with the determined at least one audio source; a calibrator configured to calibrate at least one of the at least two microphone signals based on the at least one direction.

Detection of a microphone

An apparatus comprising: an input configured to receive at least two groups of at least two audio signals; a first audio former configured to generate a first formed audio signal from a first of the at least two groups of at least two audio signals; a second audio former configured to generate a second formed audio signal from the second of the at least two groups of at least two audio signals; an audio analyzer configured to analyze the first formed audio signal and the second formed audio signal to determine at least one audio source and an associated audio source signal; and an audio signal synthesizer configured to generate at least one output audio signal based on the at least one audio source and the associated audio source signal.

Audio apparatus

An apparatus configured to operate under cognitive radio principles. The apparatus includes a processor configured to perform spectrum sensing in the apparatus to produce spectrum sensing data; and first circuitry configured to share the spectrum sensing data with other apparata.

Cognitive radio

A method is disclosed for mitigating narrowband interference within a system for wideband communications. The method can include separating a wideband signal into a plurality of sub bands, detecting energy levels in the sub-bands, and activating a control signal if the energy levels of the sub-bands differ by a predetermined amount. Such a difference in energy levels can indicate that narrowband interference is present and interference mitigation features can be activated. In another embodiment, a system is disclosed that has a band splitter and a plurality of energy level detectors to detect energy differences in the sub bands. Other embodiments are also disclosed.

Arrangements for narrow band interference detection

In some embodiments a method is disclosed for detecting periodic interference and predicting future interference times. The method can include detecting an arrival time of a first occurrence of interference and detecting an arrival time of a second occurrence of interference. The method can include transmitting preemptive interference mitigation control signals that anticipate future arrival times of interference. A system is disclosed that includes a periodicity detector, an interference profiler and a mitigation control module. The system can provide interference mitigation features to a data recovery system. Other embodiments are disclosed.

Arrangements for acquiring and using data obtained from received interference to facilitate data recovery

In a cognitive radio environment with at least three cognitive radio terminals, terminalsandhave an active link. Terminalestimates the link quality, and if it is deemed good terminaltransmits over the frequency band in use on the link. Terminalthen monitors the link between terminalsandto quantify its interference on it. If no interference is detected terminalcan increase its power. If terminalsandchange their modulation terminaldeems its interference too severe and either reduces power or finds another frequency band. Terminalcan use blind modulation detection for the link between terminalsand, and estimate link quality based on the type of modulation in use.

Method and apparatus to operate a cognitive radio in a crowded collaborative system

A user equipment senses a plurality of wireless signals it receives; estimates cyclic correlation of the received signals using a multi-variate sign function; determines from the estimated cyclic correlation which ones of the signals are detected based on cyclostationarity present at known cyclic frequencies; and a frequency resource is selected for opportunistic communications based on the frequencies over which were received the signals that were determined to be detected. In specific embodiments, the multi-variate sign function is bivariate; the detected signals are primary user signals and the selected frequency resource avoids frequencies on which they were received; and/or the detected signals are secondary user signals and the selected frequency resource can either avoid those frequencies on which they were received or use those frequencies for the UE's own opportunistic communications.

Correlation-based detection in a cognitive radio system

A wideband signal comprising both a wanted signal and narrowband interference is received in a wideband receiver. The receiver comprises an interference detection unit comprising a set of sub-band filters. With the aid of the sub-band filters the received signal is processed to detect a sub-band containing the narrowband interference in time domain.

Interference in communication devices

A method is disclosed for interference mitigation which can include receiving a signal having a data component, an interfering component and a time period and creating a first plurality of digitized data that represents at least a portion of the interfering component. The method can also include generating a polynomial equation that is related to the at least a portion of the interfering component and generating a second plurality of digital data that represents a data vector of the received signal. The method can further subtract the polynomial equation from the received signal to cancel at least a portion of the interfering component to provide an interference mitigated signal representing the data component.

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Tampere, Finland

Anu Huttunen