Patents by Inventor Riitta Elina Niemisto
Riitta Elina Niemisto 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).
-
Patent number: 9640187Abstract: The invention relates to a method and an apparatus for processing an audio signal, wherein the method comprises the steps of: filtering an audio signal into at least two frequency band signals, generating for each frequency band signal a plurality of sub-band signals, wherein for at least one frequency band signal the plurality of sub-band signals are generated using a time to frequency domain transform and for the at least one other frequency band the plurality of sub-band signals for the other frequency band are generated using a sub-band filterbank, and the apparatus comprises at least one processor and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus to perform the method.Type: GrantFiled: September 7, 2010Date of Patent: May 2, 2017Assignee: Nokia Technologies OyInventors: Riitta Elina Niemisto, Robert Bregovic, Bogdan Dumitrescu, Ville Mikael Myllyla
-
Patent number: 9076437Abstract: An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: filtering an audio signal into at least three frequency band signals; generating for each frequency band signal a plurality of sub-band signals; processing at least one sub-band signal from at least one frequency band; and combining the processed sub-band signals to form a combined processed audio signal.Type: GrantFiled: September 7, 2010Date of Patent: July 7, 2015Assignee: Nokia Technologies OyInventors: Riitta Elina Niemisto, Jukka Petteri Vartiainen, Bogdan Dumitrescu, Robert Bregovic
-
Publication number: 20150071463Abstract: It is inter alia disclosed to determine a peak energy level for an audio frame of a band limited audio signal; determine that the peak energy level is a maximum peak energy level by determining that the peak energy level exceeds a peak energy level determined for at least one neighboring audio frame by a first predetermined energy threshold value; classify a region of audio samples associated with the maximum peak energy level as an audio click; and suppress audio samples of the region of audio samples classified as an audio click by multiplying at least one audio sample of the audio frame with a sample wise suppressor gain function.Type: ApplicationFiled: March 30, 2012Publication date: March 12, 2015Applicant: Nokia CorporationInventors: Riitta Elina Niemistö, Jorma Mäkinen
-
Patent number: 8682662Abstract: In accordance with an example embodiment of the invention, there is provided an apparatus for detecting voice activity in an audio signal. The apparatus comprises a first voice activity detector for making a first voice activity detection decision based at least in part on the voice activity of a first audio signal received from a first microphone. The apparatus also comprises a second voice activity detector for making a second voice activity detection decision based at least in part on an estimate of a direction of the first audio signal and an estimate of a direction of a second audio signal received from a second microphone. The apparatus further comprises a classifier for making a third voice activity detection decision based at least in part on the first and second voice activity detection decisions.Type: GrantFiled: August 13, 2012Date of Patent: March 25, 2014Assignee: Nokia CorporationInventors: Riitta Elina Niemistö, Päivi Marianna Valve
-
Publication number: 20140006019Abstract: A method for estimating background noise of an audio signal comprises detecting voice activity in one or more frames of the audio signal based on one or more first conditions. The method also comprises estimating a first background noise estimation if voice activity is not detected based on the one or more first conditions. Voice activity in the one or more frames of the audio signal based on one or more second conditions is detected. A second background noise estimation is estimated if voice activity is not detected based on the one or more second conditions. The voice activity is detected in the one or more frames less often based on the one or more first conditions than based on the one or more second conditions.Type: ApplicationFiled: March 18, 2011Publication date: January 2, 2014Applicant: Nokia CorporationInventors: Erkki Juhani Paajanen, Riitta Elina Niemistö
-
Publication number: 20130035777Abstract: The invention relates to a method and an apparatus for processing an audio signal, wherein the method comprises the steps of: filtering an audio signal into at least two frequency band signals, generating for each frequency band signal a plurality of sub-band signals, wherein for at least one frequency band signal the plurality of sub-band signals are generated using a time to frequency domain transform and for the at least one other frequency band the plurality of sub-band signals for the other frequency band are generated using a sub-band filterbank, and the apparatus comprises at least one processor and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus to perform the method.Type: ApplicationFiled: September 7, 2010Publication date: February 7, 2013Applicant: NOKIA CORPORATIONInventors: Riitta Elina Niemisto, Robert Bregovic, Bogdan Dumitrescu, Ville Mikael Myllyla
-
Publication number: 20120310641Abstract: In accordance with an example embodiment of the invention, there is provided an apparatus for detecting voice activity in an audio signal. The apparatus comprises a first voice activity detector for making a first voice activity detection decision based at least in part on the voice activity of a first audio signal received from a first microphone. The apparatus also comprises a second voice activity detector for making a second voice activity detection decision based at least in part on an estimate of a direction of the first audio signal and an estimate of a direction of a second audio signal received from a second microphone. The apparatus further comprises a classifier for making a third voice activity detection decision based at least in part on the first and second voice activity detection decisions.Type: ApplicationFiled: August 13, 2012Publication date: December 6, 2012Inventors: Riitta Elina Niemistö, Päivi Marianna Valve
-
Patent number: 8275136Abstract: Disclosed herein is an apparatus. The apparatus includes a first audio input device, a second audio input device, an analog to digital converter, a voice activity detector, and a position detector. The first audio input device is configured to receive a first audio signal. The second audio input device is configured to receive a second audio signal. The analog to digital converter is connected to the first and the second audio input devices. The voice activity detector is connected to the analog to digital converter. The voice activity detector is configured to receive input from the first and the second audio input devices. The position detector is connected to the voice activity detector. The position detector is configured to determine a position of the apparatus and classify the audio signals based on, at least partially, a ratio of the first audio signal and the second audio signal.Type: GrantFiled: April 24, 2009Date of Patent: September 25, 2012Assignee: Nokia CorporationInventors: Riitta Elina Niemisto, Jukka Petteri Vartiainen
-
Patent number: 8244528Abstract: In accordance with an example embodiment of the invention, there is provided an apparatus for detecting voice activity in an audio signal. The apparatus comprises a first voice activity detector for making a first voice activity detection decision based at least in part on the voice activity of a first audio signal received from a first microphone. The apparatus also comprises a second voice activity detector for making a second voice activity detection decision based at least in part on an estimate of a direction of the first audio signal and an estimate of a direction of a second audio signal received from a second microphone. The apparatus further comprises a classifier for making a third voice activity detection decision based at least in part on the first and second voice activity detection decisions.Type: GrantFiled: April 25, 2008Date of Patent: August 14, 2012Assignee: Nokia CorporationInventors: Riitta Elina Niemistö, Päivi Marianna Valve
-
Publication number: 20110058687Abstract: An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: filtering an audio signal into at least three frequency band signals; generating for each frequency band signal a plurality of sub-band signals; processing at least one sub-band signal from at least one frequency band; and combining the processed sub-band signals to form a combined processed audio signal.Type: ApplicationFiled: September 7, 2010Publication date: March 10, 2011Applicant: Nokia CorporationInventors: Riitta Elina Niemisto, Jukka Petteri Variainen, Bogdan Dumitrescu, Robert Bregovic
-
Publication number: 20090316918Abstract: Disclosed herein is an apparatus. The apparatus includes a first audio input device, a second audio input device, an analog to digital converter, a voice activity detector, and a position detector. The first audio input device is configured to receive a first audio signal. The second audio input device is configured to receive a second audio signal. The analog to digital converter is connected to the first and the second audio input devices. The voice activity detector is connected to the analog to digital converter. The voice activity detector is configured to receive input from the first and the second audio input devices. The position detector is connected to the voice activity detector. The position detector is configured to determine a position of the apparatus and classify the audio signals based on, at least partially, a ratio of the first audio signal and the second audio signal.Type: ApplicationFiled: April 24, 2009Publication date: December 24, 2009Applicant: NOKIA CORPORATIONInventors: Riitta Elina Niemisto, Jukka Petteri Vartiainen
-
Publication number: 20090271190Abstract: In accordance with an example embodiment of the invention, there is provided an apparatus for detecting voice activity in an audio signal. The apparatus comprises a first voice activity detector for making a first voice activity detection decision based at least in part on the voice activity of a first audio signal received from a first microphone. The apparatus also comprises a second voice activity detector for making a second voice activity detection decision based at least in part on an estimate of a direction of the first audio signal and an estimate of a direction of a second audio signal received from a second microphone. The apparatus further comprises a classifier for making a third voice activity detection decision based at least in part on the first and second voice activity detection decisions.Type: ApplicationFiled: April 25, 2008Publication date: October 29, 2009Applicant: NOKIA CORPORATIONInventors: Riitta Elina Niemisto, Paivi Marianna Valve