Patents by Inventor Kazunobu Kondo

Kazunobu Kondo 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: 10728663
    Abstract: A method for setting a filter frequency response includes: dividing a target frequency band into multiple first partial bands at a frequency corresponding to an intersection between a first line representative of a target spectrum envelope and a second line representative of a first spectrum envelope derived from smoothing a measured frequency spectrum; and setting a frequency response of a filter corresponding to a first partial band specified by an operator from among the multiple first partial bands, in accordance with a setting operation for setting an adjustment amount performed by the operator with respect to the specified first partial band.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: July 28, 2020
    Assignee: YAMAHA CORPORATION
    Inventors: Kenji Ishizuka, Kenichi Tamiya, Kazunobu Kondo, Toshifumi Kunimoto
  • Publication number: 20190222932
    Abstract: A method for setting a filter frequency response includes: dividing a target frequency band into multiple first partial bands at a frequency corresponding to an intersection between a first line representative of a target spectrum envelope and a second line representative of a first spectrum envelope derived from smoothing a measured frequency spectrum; and setting a frequency response of a filter corresponding to a first partial band specified by an operator from among the multiple first partial bands, in accordance with a setting operation for setting an adjustment amount performed by the operator with respect to the specified first partial band.
    Type: Application
    Filed: March 26, 2019
    Publication date: July 18, 2019
    Inventors: Kenji ISHIZUKA, Kenichi TAMIYA, Kazunobu KONDO, Toshifumi KUNIMOTO
  • Patent number: 9824674
    Abstract: A recording method includes acquiring each piece of acoustic data representing a sound from each of a plurality of portable terminal devices. The each of the plurality of portable terminal devices includes a recording unit configured to generate the piece of acoustic data. The recording method also includes executing synchronization processing for synchronizing the respective pieces of acoustic data and executing mixing processing for mixing a plurality of pieces of acoustic data for which the synchronization processing has been executed.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: November 21, 2017
    Assignee: Yamaha Corporation
    Inventors: Yu Takahashi, Kazunobu Kondo, Motoichi Tamura
  • Publication number: 20170223452
    Abstract: A sound signal processing apparatus and system includes a control device having a processor and a memory storing instructions that causes the processor to acquire a plurality of sound signals representing sounds recorded at a plurality of positions in a sound space, respectively, and correlate the plurality of sound signals with a plurality of pieces of position information indicating the recording positions, respectively. Sound signals, from among the acquired plurality of signals correlated with the plurality of pieces of position information, are selected as a mixing target. The selected sound signals are mixed to be synchronized with each other.
    Type: Application
    Filed: April 14, 2017
    Publication date: August 3, 2017
    Inventors: Kazunobu KONDO, Takuya FUJISHIMA, Yoshifumi OIZUMI, Risa FUKUDA, Takahiro AKABANE
  • Patent number: 9454956
    Abstract: In a sound processing device, an index value calculation unit calculates a first index value that follows change of a sound signal at a first following degree and a second index value that follows the change of the sound signal at a second following degree which is lower than the first following degree. An adjustment value calculation unit calculates an adjustment value effective to adjust a reverberation component of the sound signal based on difference between the first index value and the second index value. A reverberation adjustment unit applies the adjustment value to the sound signal.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: September 27, 2016
    Assignee: Yamaha Corporation
    Inventor: Kazunobu Kondo
  • Patent number: 9224406
    Abstract: Candidate frequencies per unit segment of an audio signal are identified. First processing section identifies an estimated train that is a time series of candidate frequencies, each selected for a different one of the segments, arranged over a plurality of the unit segments and that has a high likelihood of corresponding to a time series of fundamental frequencies of a target component. Second processing section identifies a state train of states, each indicative of one of sound-generating and non-sound-generating states of the target component in a different one of the segments, arranged over the unit segments. Frequency information which designates, as a fundamental frequency of the target component, a candidate frequency corresponding to the unit segment in the estimated train is generated for each unit segment corresponding to the sound-generating state. Frequency information indicative of no sound generation is generated for each unit segment corresponding to the non-sound-generating state.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: December 29, 2015
    Assignee: Yamaha Corporation
    Inventors: Jordi Bonada, Jordi Janer, Ricard Marxer, Yasuyuki Umeyama, Kazunobu Kondo, Francisco Garcia
  • Patent number: 9123348
    Abstract: A signal processing device processes a plurality of observed signals at a plurality of frequencies. The plurality of the observed signals are produced by a plurality of sound receiving devices which receive a mixture of a plurality of sounds. In the signal processing device, a storage stores observed data of the plurality of the observed signals. The observed data represents a time series of magnitude of each frequency in each of the plurality of the observed signals. An index calculator calculates an index value from the observed data for each of the plurality of the frequencies. The index value indicates significance of learning of a separation matrix using the observed data of each frequency. The separation matrix is used for separation of the plurality of the sounds from each other at each frequency. A frequency selector selects one or more frequency according to the index value of each frequency.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: September 1, 2015
    Assignee: Yamaha Corporation
    Inventors: Makoto Yamada, Kazunobu Kondo
  • Patent number: 9106993
    Abstract: In a sound processing apparatus, a likelihood calculation unit calculates an in-region coefficient and an out-of-region coefficient indicating likelihood of generation of each frequency component of a sound signal inside and outside a target localization range, respectively, according to localization of each frequency component. A reverberation analysis unit calculates a reverberation index value according to the ratio of a reverberation component for each frequency component. A coefficient setting unit generates a process coefficient for suppressing or emphasizing a reverberation component generated inside or outside the target localization range, for each frequency component of the sound signal, on the basis of the in-region coefficient, the out-of-region coefficient and the reverberation index value. A signal processing unit applies the process coefficient of each frequency component to each frequency component of the sound signal.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: August 11, 2015
    Assignee: Yamaha Corporation
    Inventors: Kazunobu Kondo, Yu Takahashi, Yasuyuki Umeyama
  • Patent number: 9070370
    Abstract: A coefficient train processing section, which sequentially generates per unit segment a processing coefficient train for suppressing a target component of an audio signal, includes a basic coefficient train generation section and coefficient train processing section. The basic coefficient train generation section generates a basic coefficient train where basic coefficient values corresponding to frequencies within a particular frequency band range are each set at a suppression value that suppresses the audio signal while coefficient values corresponding to frequencies outside the particular frequency band range are each set at a pass value that maintains the audio signal. The coefficient train processing section generates the processing coefficient train, per unit segment, by changing, to the pass value, each of the coefficient values corresponding to frequencies other than the target component among the coefficient values corresponding to the frequencies within the particular frequency band range.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: June 30, 2015
    Assignee: Yamaha Corporation
    Inventors: Jordi Bonada, Jordi Janer, Ricard Marxer, Yasuyuki Umeyama, Kazunobu Kondo
  • Publication number: 20150104043
    Abstract: A recording method includes acquiring each piece of acoustic data representing a sound from each of a plurality of portable terminal devices. The each of the plurality of portable terminal devices includes a recording unit configured to generate the piece of acoustic data. The recording method also includes executing synchronization processing for synchronizing the respective pieces of acoustic data and executing mixing processing for mixing a plurality of pieces of acoustic data for which the synchronization processing has been executed.
    Type: Application
    Filed: October 15, 2014
    Publication date: April 16, 2015
    Inventors: Yu TAKAHASHI, Kazunobu KONDO, Motoichi TAMURA
  • Patent number: 9002035
    Abstract: Signal processing section of a terminal converts acquired audio signals of a plurality of channels into frequency spectra set, calculates sound image positions corresponding to individual frequency components, and displays, on a display screen, the calculated sound image positions results by use of a coordinate system having coordinate axes of the frequency components and sound image positions. User-designated partial region of the coordinate system is set as a designated region and an amplitude-level adjusting amount is set for the designated region, so that the signal processing section adjusts amplitude levels of frequency components included in the frequency spectra and in the designated region, converts the adjusted frequency components into audio signals and outputs the converted audio signals.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: April 7, 2015
    Assignee: Yamaha Corporation
    Inventors: Yasuyuki Umeyama, Kazunobu Kondo, Yu Takahashi, Jordi Bonada, Jordi Janer, Ricard Marxer
  • Patent number: 8634275
    Abstract: In an audio processing device, a target sound emphasizer generates a target sound emphasized component by emphasizing a target sound component contained in a plurality of audio signals generated by a plurality of sound receiving devices. A stereo processor generates a stereo component of a plurality of channels from the plurality of audio signals. A first adjuster adjusts a sound pressure level of the target sound emphasized component according to a first adjustment value, and a second adjuster adjusts a sound pressure level of the stereo component according to a second adjustment value. A variable setter variably sets a zoom value which is changeable between a wide angle side and a telephoto side relative to a target.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: January 21, 2014
    Assignee: Yamaha Corporation
    Inventors: Kazunobu Kondo, Kenichi Yamauchi, Hideki Kemmochi
  • Publication number: 20130243211
    Abstract: In a sound processing apparatus, a likelihood calculation unit calculates an in-region coefficient and an out-of-region coefficient indicating likelihood of generation of each frequency component of a sound signal inside and outside a target localization range, respectively, according to localization of each frequency component. A reverberation analysis unit calculates a reverberation index value according to the ratio of a reverberation component for each frequency component. A coefficient setting unit generates a process coefficient for suppressing or emphasizing a reverberation component generated inside or outside the target localization range, for each frequency component of the sound signal, on the basis of the in-region coefficient, the out-of-region coefficient and the reverberation index value. A signal processing unit applies the process coefficient of each frequency component to each frequency component of the sound signal.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 19, 2013
    Applicant: Yamaha Corporation
    Inventors: Kazunobu KONDO, Yu TAKAHASHI, Yasuyuki UMEYAMA
  • Publication number: 20120201385
    Abstract: Signal processing section of a terminal converts acquired audio signals of a plurality of channels into frequency spectra set, calculates sound image positions corresponding to individual frequency components, and displays, on a display screen, the calculated sound image positions results by use of a coordinate system having coordinate axes of the frequency components and sound image positions. User-designated partial region of the coordinate system is set as a designated region and an amplitude-level adjusting amount is set for the designated region, so that the signal processing section adjusts amplitude levels of frequency components included in the frequency spectra and in the designated region, converts the adjusted frequency components into audio signals and outputs the converted audio signals.
    Type: Application
    Filed: February 7, 2012
    Publication date: August 9, 2012
    Applicant: YAMAHA CORPORATION
    Inventors: Yasuyuki UMEYAMA, Kazunobu Kondo, Yu Takahashi, Jordi Bonada, Jordi Janer, Ricard Marxer
  • Publication number: 20120134508
    Abstract: An audio processing apparatus generates a suppression coefficient sequence that is composed of coefficient values corresponding to frequency components of an audio signal, the frequency components being multiplied by the corresponding coefficient values to suppress noise components of the audio signal. In the audio processing apparatus, a characteristic value calculation unit calculates a noise characteristic value depending on a shape of a magnitude distribution of the audio signal. An intensity setting unit variably sets a suppression intensity of the noise components based on the noise characteristic value. A coefficient sequence generation unit generates the suppression coefficient sequence based on the audio signal and the suppression intensity.
    Type: Application
    Filed: November 23, 2011
    Publication date: May 31, 2012
    Applicants: Nara Institute of Science and Technology National University Corporation, YAMAHA CORPORATION
    Inventors: Takayuki Inoue, Hiroshi Saruwatari, Kazunobu Kondo
  • Publication number: 20120106746
    Abstract: Candidate frequencies per unit segment of an audio signal are identified. First processing section identifies an estimated train that is a time series of candidate frequencies, each selected for a different one of the segments, arranged over a plurality of the unit segments and that has a high likelihood of corresponding to a time series of fundamental frequencies of a target component. Second processing section identifies a state train of states, each indicative of one of sound-generating and non-sound-generating states of the target component in a different one of the segments, arranged over the unit segments. Frequency information which designates, as a fundamental frequency of the target component, a candidate frequency corresponding to the unit segment in the estimated train is generated for each unit segment corresponding to the sound-generating state. Frequency information indicative of no sound generation is generated for each unit segment corresponding to the non-sound-generating state.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 3, 2012
    Applicant: YAMAHA CORPORATION
    Inventors: Jordi BONADA, Jordi Janer, Ricard Marxer, Yasuyuki Umeyama, Kazunobu Kondo, Francisco Garcia
  • Publication number: 20120106758
    Abstract: A coefficient train processing section, which sequentially generates per unit segment a processing coefficient train for suppressing a target component of an audio signal, includes a basic coefficient train generation section and coefficient train processing section. The basic coefficient train generation section generates a basic coefficient train where basic coefficient values corresponding to frequencies within a particular frequency band range are each set at a suppression value that suppresses the audio signal while coefficient values corresponding to frequencies outside the particular frequency band range are each set at a pass value that maintains the audio signal. The coefficient train processing section generates the processing coefficient train, per unit segment, by changing, to the pass value, each of the coefficient values corresponding to frequencies other than the target component among the coefficient values corresponding to the frequencies within the particular frequency band range.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 3, 2012
    Applicant: YAMAHA CORPORATION
    Inventors: Jordi BONADA, Jordi JANER, Ricard MARXER, Yasuyuki UMEYAMA, Kazunobu KONDO
  • Patent number: 8090119
    Abstract: A noise suppressing apparatus suppresses a noise component of a sound signal which contains the noise component and a signal component. In the apparatus, a frequency analyzing section divides the sound signal into a plurality of frames such that adjacent frames overlap with each other along a time axis, and computes a first spectrum of each frame. A noise suppressing section suppresses a noise component of the first spectrum so as to provide a second spectrum of each frame in which the noise component is suppressed. A frequency specifying section specifies a frequency of a noise component of each frame. A phase controlling section varies a phase of the noise component corresponding to the specified frequency in the second spectrum by a different variation amount each frame.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: January 3, 2012
    Assignee: Yamaha Corporation
    Inventor: Kazunobu Kondo
  • Publication number: 20110211711
    Abstract: In a noise suppression apparatus, an index setter sets an exponent K that is a positive value. A factor setter variably sets a suppression factor according to the exponent K. A noise suppressor generates an audio signal from which a noise component is suppressed through noise suppression process of suppressing a Kth power of an amplitude of the noise component at each frequency thereof in a Kth power of an amplitude of the audio signal at each frequency thereof to a degree determined according to the suppression factor set by the factor setting part. Preferably, the index setter sets the exponent K to a value less than 0.1.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 1, 2011
    Inventors: Takayuki Inoue, Yu Takahashi, Hiroshi Saruwatari, Kazunobu Kondo
  • Publication number: 20110170707
    Abstract: A noise suppressing device is provided for suppressing noise of a first audio signal to generate a second audio signal. In the noise suppressing device, a noise acquisition unit acquires a plurality of noise components which are different from each other. A noise suppression unit generates each suppression component by suppressing each noise component from the first audio signal, thereby providing a plurality of suppression components different from each other in correspondence to the plurality of the noise components. A signal generation unit generates the second audio signal by summing the plurality of the suppression components that are provided from the noise suppression unit.
    Type: Application
    Filed: January 12, 2011
    Publication date: July 14, 2011
    Applicant: Yamaha Corporation
    Inventors: Makoto YAMADA, Kazunobu Kondo