Patents by Inventor Takuya Kawashima

Takuya Kawashima 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: 10396008
    Abstract: A semiconductor device includes a first metal plate and a second metal plate which interpose a first semiconductor element therebetween, the first metal plate and the second metal plate being bonded to the first semiconductor element with first soldered portions; and includes a third metal plate and a fourth metal plate which interpose a second semiconductor element therebetween, the third metal plate and the fourth metal plate being bonded to the second semiconductor element with second soldered portions. A first joint provided at an edge of the first metal plate and a second joint provided at an edge of the fourth metal plate are bonded with a third soldered portion. A total sum of thicknesses of the first soldered portions is different from a thickness of the third soldered portion, a solidifying point of the thinner one is higher than a solidifying point of the thicker one.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: August 27, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Takahagi, Takuya Kadoguchi, Yuji Hanaki, Syou Funano, Shingo Iwasaki, Takanori Kawashima
  • Publication number: 20190228783
    Abstract: An audio signal coding apparatus includes a time-frequency transformer that outputs sub-band spectra from an input signal; a sub-band energy quantizer; a tonality calculator that analyzes tonality of the sub-band spectra; a bit allocator that selects a second sub-band on which quantization is performed by a second quantizer on the basis of the analysis result of the tonality and quantized sub-band energy, and determines a first number of bits to be allocated to a first sub-band on which quantization is performed by a first quantizer; the first quantizer that performs first coding using the first number of bits; the second quantizer that performs coding using a second coding method; and a multiplexer.
    Type: Application
    Filed: March 29, 2019
    Publication date: July 25, 2019
    Inventors: TAKUYA KAWASHIMA, HIROYUKI EHARA
  • Publication number: 20190198035
    Abstract: A coding apparatus includes a processor and a memory that stores instructions, which when executed causes the processor to perform operations, including encoding a first band of an input audio signal to be a first spectrum and dividing the first spectrum into a plurality of sub-bands. The operations also include searching a largest amplitude value of the divided first spectrum in each of the plurality of sub-bands, and normalizing the divided first spectrum in each of the plurality of sub-bands. The operations further include emphasizing a harmonic structure in the normalized first spectrum, and searching a best band that has a largest correlation value between each divided band of a second band spectrum and the emphasized first spectrum in which the harmonic structure is emphasized, and encoding the second band spectrum using lag information identifying the best band and transmitting the lag information to a decoder side.
    Type: Application
    Filed: March 1, 2019
    Publication date: June 27, 2019
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya KAWASHIMA, Katsunori DAIMOU, Masahiro OSHIKIRI
  • Patent number: 10311879
    Abstract: An audio signal coding apparatus includes a time-frequency transformer that outputs sub-band spectra from an input signal; a sub-band energy quantizer; a tonality calculator that analyzes tonality of the sub-band spectra; a bit allocator that selects a second sub-band on which quantization is performed by a second quantizer on the basis of the analysis result of the tonality and quantized sub-band energy, and determines a first number of bits to be allocated to a first sub-band on which quantization is performed by a first quantizer; the first quantizer that performs first coding using the first number of bits; the second quantizer that performs coding using a second coding method; and a multiplexer.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: June 4, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Takuya Kawashima, Hiroyuki Ehara
  • Publication number: 20190147897
    Abstract: A speech/audio coding apparatus includes a receiver that receives a time-domain speech input signal. The apparatus also includes a processor that transforms a time-domain speech input signal into a frequency-domain spectrum, and divides a frequency region of the spectrum in an extended band into a plurality of bands. The processor sets a limited band for each divided band in the current frame, a width of the limited band in the current frame being narrower than the divided band and the limited band including a first frequency. The processor further encodes the spectrum in the limited band within each divided band in the current frame, wherein the width of the limited band is predetermined and is set to 31.
    Type: Application
    Filed: January 9, 2019
    Publication date: May 16, 2019
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya KAWASHIMA, Masahiro OSHIKIRI
  • Publication number: 20190130924
    Abstract: A coding apparatus, including a memory and a processor that, when executing instructions stored in the memory, performs operations including encoding low-band transform coefficients in a first band and calculating, for each extension-band subband obtained by splitting an extension band, a threshold amplitude based on an analysis of statistics on extension-band transform coefficients included in the subband.
    Type: Application
    Filed: November 19, 2018
    Publication date: May 2, 2019
    Inventors: Takuya KAWASHIMA, Masahiro OSHIKIRI
  • Patent number: 10269367
    Abstract: A coding apparatus, including a processor that performs operations, including encoding a first band of an input audio signal to be a first spectrum and dividing the first spectrum into a plurality of subbands at equal intervals, each interval including a predetermined number of samples. The operations also include searching a largest amplitude value of the divided first spectrum in each of the subbands, and normalizing the divided first spectrum with the largest amplitude values searched in each of the subbands to obtain a flattened first spectrum. The operations further include searching a best band which has a largest correlation value between each divided band of a second band spectrum and the flattened first spectrum, the second spectrum being higher than a predetermined frequency, and encoding the second spectrum using lag information identifying the best bands for transmitting the lag information to a decoder side.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: April 23, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Katsunori Daimou, Masahiro Oshikiri
  • Patent number: 10210877
    Abstract: A speech/audio decoding apparatus is provided that includes a receiver that receives encoded data including a limited-band mode flag, and a memory that stores information on a position of a maximum amplitude spectrum frequency of a previous frame in a divided band. The speech/audio decoding apparatus also includes a processor that identifies whether a decoding band is encoded using a limited-band mode based on the decoded limited-band mode flag. Additionally, the processor decodes the spectrum in a limited band within each of the divided bands in a current frame using the stored information. Furthermore, the limited-band mode is set at an encoder side, when a difference between a first frequency with a first maximum amplitude in a spectrum of the divided band in a preceding frame and a second frequency with a second maximum amplitude in a spectrum of the divided band in the current frame is below a threshold.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 19, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Masahiro Oshikiri
  • Publication number: 20180336908
    Abstract: A decoding device includes: a separating unit separating first encoded data, a spectrum including a low-band spectrum of audio signals having been encoded, and second encoded data, a high-band spectrum of a higher band having been encoded, based on the first encoded data; a first decoding unit decoding the first encoded data and generating a first decoded spectrum; a first amplitude normalizer dividing amplitude of the first decoded spectrum into sub-bands, normalizing the spectrum of each sub-band by the largest amplitude of the first decoded spectrum within each sub-band, and generating a normalized spectrum; an addition unit adding noise spectrum to the normalized spectrum and generating a noise-added normalized spectrum; a second decoding unit decoding the second encoded data using the noise-added normalized spectrum, and generating a second noise-added spectrum; and a converter performing time-frequency conversion regarding a spectrum coupled based on the first decoded spectrum and second noise-added spe
    Type: Application
    Filed: July 27, 2018
    Publication date: November 22, 2018
    Inventors: Takuya KAWASHIMA, Hiroyuki EHARA
  • Patent number: 10134410
    Abstract: A coding apparatus, including a memory and a processor that, when executing instructions stored in the memory, performs operations including encoding low-band transform coefficients in a first band and calculating, for each extension-band subband obtained by splitting an extension band, a threshold amplitude based on an analysis of statistics on extension-band transform coefficients included in the subband.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: November 20, 2018
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Takuya Kawashima, Masahiro Oshikiri
  • Patent number: 10062389
    Abstract: A decoding device includes: a separating unit separating first encoded data, a spectrum including a low-band spectrum of audio signals having been encoded, and second encoded data, a high-band spectrum of a higher band having been encoded, based on the first encoded data; a first decoding unit decoding the first encoded data and generating a first decoded spectrum; a first amplitude normalizer dividing amplitude of the first decoded spectrum into sub-bands, normalizing the spectrum of each sub-band by the largest amplitude of the first decoded spectrum within each sub-band, and generating a normalized spectrum; an addition unit adding noise spectrum to the normalized spectrum and generating a noise-added normalized spectrum; a second decoding unit decoding the second encoded data using the noise-added normalized spectrum, and generating a second noise-added spectrum; and a converter performing time-frequency conversion regarding a spectrum coupled based on the first decoded spectrum and second noise-added spe
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: August 28, 2018
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Takuya Kawashima, Hiroyuki Ehara
  • Publication number: 20180158466
    Abstract: A coding apparatus, including a processor that performs operations including encoding a first band of an input audio signal to be a first spectrum, dividing the first spectrum into a plurality of subbands, at equal intervals each including a predetermined number of samples for flattening the first spectrum, searching a largest amplitude value of the divided first spectrum in each of the subbands, normalizing the divided first spectrum with the largest amplitude values searched in each of the subbands, searching best bands among each normalized divided first spectrum which has a largest correlation value between each divided band of a second band spectrum and each normalized divided first spectrum, the second spectrum being higher than a predetermined frequency, and encoding the second spectrum using lag information identifying the best bands for transmitting the lag information to a decoder side.
    Type: Application
    Filed: December 15, 2017
    Publication date: June 7, 2018
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya KAWASHIMA, Katsunori DAIMOU, Masahiro OSHIKIRI
  • Publication number: 20180114535
    Abstract: A speech/audio decoding apparatus is provided that includes a receiver that receives encoded data including a limited-band mode flag, and a memory that stores information on a position of a maximum amplitude spectrum frequency of a previous frame in a divided band. The speech/audio decoding apparatus also includes a processor that identifies whether a decoding band is encoded using a limited-band mode based on the decoded limited-band mode flag. Additionally, the processor decodes the spectrum in a limited band within each of the divided bands in a current frame using the stored information. Furthermore, the limited-band mode is set at an encoder side, when a difference between a first frequency with a first maximum amplitude in a spectrum of the divided band in a preceding frame and a second frequency with a second maximum amplitude in a spectrum of the divided band in the current frame is below a threshold.
    Type: Application
    Filed: December 20, 2017
    Publication date: April 26, 2018
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya KAWASHIMA, Masahiro OSHIKIRI
  • Patent number: 9892740
    Abstract: A speech/audio coding apparatus is provided that includes a receiver that receives a time-domain speech input signal and a processor. The processor transforms a time-domain speech input signal into a frequency-domain spectrum, and divides a frequency region of the spectrum in an extended band into a plurality of bands. The processor also sets a limited band for each divided band in the current frame, when a difference between a first frequency with a first maximum amplitude in a spectrum of the divided band in a preceding frame and a second frequency with a second maximum amplitude in a spectrum of the divided band in a current frame is below a threshold. The processor further encodes the spectrum in the limited band within each divided band in the current frame, and does not encode a spectrum outside the limited band within each divided band in the current frame.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: February 13, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Masahiro Oshikiri
  • Patent number: 9886964
    Abstract: A coding apparatus encodes a first band of an input audio signal, normalizes a first spectrum included in each sub-band of the first band using a spectrum power envelope, performs a clipping process on the normalized first spectrum, the clipping process comparing between a predetermined threshold and the absolute value of an amplitude of the spectrum and replaces the amplitude value of the spectrum with the threshold if the absolute value of the amplitude of the spectrum exceeds the threshold, calculates a correlation between a spectrum in each divided band of a second band and a spectrum in a plurality of candidate bands containing the clipped normalized first spectrum, the second spectrum being higher than a predetermined frequency, identifies the best bands of the plurality of candidate bands, and encodes the second spectrum using lag information identifying the best band for transmitting the lag information to a decoder.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: February 6, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Katsunori Daimou, Masahiro Oshikiri
  • Publication number: 20170337931
    Abstract: A coding apparatus encodes a first band of an input audio signal, normalizes a first spectrum included in each sub-band of the first band using a spectrum power envelope, performs a clipping process on the normalized first spectrum, the clipping process comparing between a predetermined threshold and the absolute value of an amplitude of the spectrum and replaces the amplitude value of the spectrum with the threshold if the absolute value of the amplitude of the spectrum exceeds the threshold, calculates a correlation between a spectrum in each divided band of a second band and a spectrum in a plurality of candidate bands containing the clipped normalized first spectrum, the second spectrum being higher than a predetermined frequency, identifies the best bands of the plurality of candidate bands, and encodes the second spectrum using lag information identifying the best band for transmitting the lag information to a decoder.
    Type: Application
    Filed: July 11, 2017
    Publication date: November 23, 2017
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya KAWASHIMA, Katsunori DAIMOU, Masahiro OSHIKIRI
  • Publication number: 20170243594
    Abstract: A speech/audio coding apparatus is provided that includes a receiver that receives a time-domain speech input signal and a processor. The processor transforms a time-domain speech input signal into a frequency-domain spectrum, and divides a frequency region of the spectrum in an extended band into a plurality of bands. The processor also sets a limited band for each divided band in the current frame, when a difference between a first frequency with a first maximum amplitude in a spectrum of the divided band in a preceding frame and a second frequency with a second maximum amplitude in a spectrum of the divided band in a current frame is below a threshold. The processor further encodes the spectrum in the limited band within each divided band in the current frame, and does not encode a spectrum outside the limited band within each divided band in the current frame.
    Type: Application
    Filed: May 9, 2017
    Publication date: August 24, 2017
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya KAWASHIMA, Masahiro OSHIKIRI
  • Patent number: 9741356
    Abstract: A coding apparatus normalizes a low-frequency spectrum included in each of sub-bands obtained from dividing a low band part, using a largest amplitude value among the low-frequency spectrum included in each sub-band, obtains a normalized low-frequency spectrum by decoding the first encoded data, and calculates a correlation between each divided band of a high-frequency spectrum and a plurality of candidate bands of the normalized low-frequency spectrum. The best bands of a plurality of candidate bands are identified, each candidate band having a starting frequency position with non-zero amplitude in the normalized low-frequency spectrum, the high-frequency spectrum being in a high band part of the input audio signal that is higher than the predetermined frequency, and the high-frequency spectrum is encoded using lag information identifying the best band for transmitting the lag information to a decoder.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: August 22, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Katsunori Daimou, Masahiro Oshikiri
  • Patent number: 9679576
    Abstract: A speech/audio coding apparatus and method is provided. The number of encoding bits allocated to encoding of extended-band spectrum is reduced while degradation of sound quality in the extended band is suppressed. A band compression unit creates combinations of sub-band spectra in pairs of two samples each in order from a low-range side in a band compression target sub-band, selects a spectrum having a large absolute-value amplitude among the combinations, and arranges the selected spectrum close to the low-range side on a frequency axis. A number-of-units recalculation unit redistributes bits saved in the sub-band for which band compression was performed to a low range outside the extended band, and redistributes the number of units on the basis of the redistributed bits.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: June 13, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Masahiro Oshikiri
  • Publication number: 20170076728
    Abstract: A speech/audio encoding device for selectively allocating bits for higher precision encoding. The speech/audio encoding device receives a time-domain speech/audio input signal, transforms the speech/audio input signal into a frequency domain, and quantizes an energy envelope corresponding to an energy level for a frequency spectrum of the speech/audio input signal. The speech/audio encoding device further groups quantized energy envelopes into a plurality of groups, determines a perceptual significant group including one or more significant bands and a local-peak frequency, and allocates bits to a plurality of subbands corresponding to the grouped quantized energy envelopes, in which each of the subbands is obtained by splitting the frequency spectrum of the speech/audio input signal. The speech/audio encoding device encodes the frequency spectrum using the bits allocated to the subbands.
    Type: Application
    Filed: November 22, 2016
    Publication date: March 16, 2017
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya KAWASHIMA, Masahiro OSHIKIRI