Patents by Inventor Matti Kajala
Matti Kajala has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11330151Abstract: An apparatus, method and computer program product for receiving captured visual information comprising a representation of an object, receiving captured audio information associated with the object, determining a user awareness parameter indicating a level of user comprehension of a context of capturing the visual information and the audio information and selecting, based on the user awareness parameter, a type of synchronization of the captured audio information with respect to the captured visual information.Type: GrantFiled: April 10, 2020Date of Patent: May 10, 2022Assignee: Nokia Technologies OyInventors: Matti Kajala, Antero Tossavainen, Mikko Olavi Heikkinen, Miikka Tapani Vilermo
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Publication number: 20200336624Abstract: An apparatus, method and computer program product for receiving captured visual information comprising a representation of an object, receiving captured audio information associated with the object, determining a user awareness parameter indicating a level of user comprehension of a context of capturing the visual information and the audio information and selecting, based on the user awareness parameter, a type of synchronization of the captured audio information with respect to the captured visual information.Type: ApplicationFiled: April 10, 2020Publication date: October 22, 2020Inventors: Matti Kajala, Antero Tossavainen, Mikko Olavi Heikkinen, Miikka Tapani Vilermo
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Patent number: 8611556Abstract: The specification and drawings present a new method, apparatus and software product for calibrating multiple microphones (e.g., a microphone array) to match their sensitivity using an ambient noise by creating and updating one or more calibration signal level difference histograms.Type: GrantFiled: April 22, 2009Date of Patent: December 17, 2013Assignee: Nokia CorporationInventors: Kalle Makinen, Matti Kajala
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Publication number: 20110051953Abstract: The specification and drawings present a new method, apparatus and software product for calibrating multiple microphones (e.g., a microphone array) to match their sensitivity using an ambient noise by creating and updating one or more calibration signal level difference histograms.Type: ApplicationFiled: April 22, 2009Publication date: March 3, 2011Applicant: NOKIA CORPORATIONInventors: Kalle Makinen, Matti Kajala
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Patent number: 7778425Abstract: This invention describes a method for generating noise references for adaptive interference cancellation filters for applications in generalized sidelobe canceling systems. More specifically the present invention relates to a multi-microphone beamforming system similar to a generalized sidelobe canceller (GSC) structure, but the difference with the GSC is that the present invention creates noise references to the adaptive interference canceller (AIC) filters using steerable beams that block out the desired signal when the beam is steered away from the desired signal source location.Type: GrantFiled: December 24, 2003Date of Patent: August 17, 2010Assignee: Nokia CorporationInventors: Matti Kajala, Matti Hämäläinen, Ville Myllylä
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Publication number: 20050149320Abstract: This invention describes a method for generating noise references for adaptive interference cancellation filters for applications in generalized sidelobe canceling systems. More specifically the present invention relates to a multi-microphone beamforming system similar to a generalized sidelobe canceller (GSC) structure, but the difference with the GSC is that the present invention creates noise references to the adaptive interference canceller (AIC) filters using steerable beams that block out the desired signal when the beam is steered away from the desired signal source location.Type: ApplicationFiled: December 24, 2003Publication date: July 7, 2005Inventors: Matti Kajala, Matti Hamalainen, Ville Myllyla
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Publication number: 20050147258Abstract: The present invention describes a method for temporal adjustment of adaptation control of an adaptive interference canceller (AIC) based on spatially weighted beamforming pre-processing. Most importantly, the present invention enhances the spatial blocking performance, while generating noise references for the AIC by a beamformer, by introducing dynamic adjustment to the AIC filter adaptation control. As a result, adaptation is effectively realized in two dimensions—spatial and temporal. The criterion for adjusting the AIC filter adaptation control is applied continuously following generation of the noise references. Essential in the invention is the comparison of the short-time powers or levels of the noise reference signals and desired signal beams and allowing the adaptation of the AIC filter under consideration only when the noise reference signal power is large enough in comparison with the desired signal power.Type: ApplicationFiled: December 24, 2003Publication date: July 7, 2005Inventors: Ville Myllyla, Matti Kajala, Matti Hamalainen
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Patent number: 6836243Abstract: The invention relates to a system and method for processing a signal being emitted from a target signal source 20 into a noisy environment, wherein said target signal source 20 is located in a target signal source direction &phgr;s with regard to the position of a transducer array 10, the method comprising the following steps: receiving, transforming and filtering said signal according to filter coefficients of a beamformer 30I, 30II in order to generate at least one beamformer output signal y′i(n), i=1 . . . N, the filter coefficients defining a desired predetermined filter characteristic of the beamformer; and generating a control signal t(n) representing said target signal source direction &phgr;s. It is the object of the invention to improve such a system and method in the way that clear signal reception is achieved for any target signal source direction &phgr;s with only a minimum of computational effort and memory capacity.Type: GrantFiled: July 10, 2003Date of Patent: December 28, 2004Assignee: Nokia CorporationInventors: Matti Kajala, Matti Hāmäläinen
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Publication number: 20040138876Abstract: A method and device for improving the quality of speech signals transmitted using an audio bandwidth between 300 Hz and 3.4 kHz. After the received speech signal is divided into frames, zeros are inserted between samples to double the sampling frequency. The level of these aliased frequency components is adjusted using an adaptive algorithm based on the classification of the speech frame. Sound can be classified into sibilants and non-sibilants, and a non-sibilant sound can be further classified into a voiced sound and a stop consonant. The adjustment is based on parameters, such as the number of zero-crossings and energy distribution, computed from the spectrum of the up-sampled speech signal between 300 Hz and 3.4 kHz. A new sound with a bandwidth between 300 Hz and 7.7 kHz is obtained by inverse Fourier transforming the spectrum of the adjusted, up-sampled sound.Type: ApplicationFiled: January 10, 2003Publication date: July 15, 2004Applicant: Nokia CorporationInventors: Loura Kallio, Paavo Alku, Kimmo Kayhko, Matti Kajala, Paivi Valve
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Publication number: 20040013038Abstract: The invention relates to a system and method for processing a signal being emitted from a target signal source 20 into a noisy environment, wherein said target signal source 20 is located in a target signal source direction &phgr;s with regard to the position of a transducer array 10, the method comprising the following steps: receiving, transforming and filtering said signal according to filter coefficients of a beamformer 30I, 30II in order to generate at least one beamformer output signal y′i(n), i=1 . . . N, the filter coefficients defining a desired predetermined filter characteristic of the beamformer; and generating a control signal t(n) representing said target signal source direction &phgr;s. It is the object of the invention to improve such a system and method in the way that clear signal reception is achieved for any target signal source direction &phgr;s with only a minimum of computational effort and memory capacity.Type: ApplicationFiled: July 10, 2003Publication date: January 22, 2004Inventors: Matti Kajala, Matti Hamalainen
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Patent number: 6470470Abstract: Focused error correction and/or focused error detection is used in the information coding system. A speech encoding method, in which the number of speech parameter bits on which error correction coding and/or error detection coding focuses is automatically adjusted in relation to the number of total speech parameter bits as a function of the quality of the information transfer connection. There is no need to reduce the number of bits used for speech encoding. Thus the voice quality of the speech remains high. The error correction and/or error detection is focused on the bits most important for the voice quality e.g., as a function of the C/I (Channel to Interference)13 parameter describing the quality of the information transfer connection. The muting of speech synthesizing occuring in prior systems on poor information transfer connection is reduced by using focused error detection.Type: GrantFiled: February 6, 1998Date of Patent: October 22, 2002Assignee: Nokia Mobile Phones LimitedInventors: Kari Jarvinen, Matti Kajala, Janne Vainio
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Patent number: 6430721Abstract: The invention relates to a method for decreasing the frame error rate of information to be transmitted in the form of data frames in a data transmission system, in which the information to be transmitted is divided into data frames. The data frame is supplemented with error correction data generated by using part of the information to be transferred. At least part of the information to be used in the generation of error correction data is protected by error correction coding, by which an error correction coded data frame is obtained, in which different parts of the protected information have different error rates (BER). The error correction coded data frames are transferred in the data transmission channel from the transmitter to the receiver. The error rates of at least one part of the protected information are levelled out by shaping at the transmission stage that information part which is protected by error correction coding and which is used in the generation of the error correction data.Type: GrantFiled: December 5, 2000Date of Patent: August 6, 2002Assignee: Nokia Mobile Phones LimitedInventors: Matti Kajala, Janne Vainio
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Publication number: 20020035713Abstract: Focused error correction and/or focused error detection is used in the information coding system according to the invention. The purpose of the present invention is to present a speech encoding method, in which the number of speech parameter bits on which error correction coding and/or error detection coding focuses is automatically adjusted in relation to the number of total speech parameter bits as the function of the quality of the information transfer connection. In the information encoding system according to the invention there is no need to reduce the number of bits used for speech encoding, due to which the voice quality of the speech remains high. In the information encoding system according to the invention the error correction and/or error detection is focused on the bits most important for the voice quality e.g. as the function of the C/I (Channel to Interference)-parameter describing the quality of the information transfer connection.Type: ApplicationFiled: February 6, 1998Publication date: March 21, 2002Inventors: KARI JARVINEN, MATTI KAJALA, JANNE VAINIO
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Publication number: 20010000543Abstract: The invention relates to a method for decreasing the frame error rate of information to be transmitted in the form of data frames in a data transmission system, in which the information to be transmitted is divided into data frames (102, 202). The data frame (102, 202) is supplemented with error correction data generated by using part of the information to be transferred. At least part of the information to be used in the generation of error correction data is protected by error correction coding (107, 206), by which an error correction coded data frame (108, 207) is obtained, in which different parts of the protected information have different error rates (BER). The error correction coded data frames (111, 212) are transferred in the data transmission channel from the transmitter to the receiver.Type: ApplicationFiled: December 5, 2000Publication date: April 26, 2001Applicant: Nokia Mobile Phones LimitedInventors: Matti Kajala, Janne Vainio
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Patent number: 6178535Abstract: The invention relates to a method for decreasing the frame error rate of information to be transmitted in the form of data frames in a data transmission system, in which the information to be transmitted is divided into data frames (102, 202). The data frame (102, 202) is supplemented with error correction data generated by using part of the information to be transferred. At least part of the information to be used in the generation of error correction data is protected by error correction coding (107, 206), by which an error correction coded data frame (108, 207) is obtained, in which different parts of the protected information have different error rates (BER). The error correction coded data frames (111, 212) are transferred in the data transmission channel from the transmitter to the receiver.Type: GrantFiled: April 9, 1998Date of Patent: January 23, 2001Assignee: Nokia Mobile Phones LimitedInventors: Matti Kajala, Janne Vainio