Patents by Inventor Yutaka Kamamoto

Yutaka Kamamoto 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: 12080153
    Abstract: Provided is a vibration presentation system that improves the convenience of a user in sensing vibrations at various body sites, or of a plurality of users in sensing vibrations. A vibration presentation system for presenting vibration signals for perception by tactile sense for media content, the vibration presentation system including: a vibrating body configured to generate vibrations corresponding to the vibration signals of a plurality of channels respectively; and a presentation target batch selection user interface including a plurality of (M, where M is an integer of 2 or more) combinations each of which contains one selection button and designation of a predefined body site for a channel included in the plurality of channels, wherein the vibrating body generates vibrations corresponding to the vibration signals for a body site for a channel included in a combination corresponding to a selection button selected from among M selection buttons.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: September 3, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Junji Watanabe, Yutaka Kamamoto
  • Patent number: 12051430
    Abstract: A coding method and a decoding method are provided which can use in combination a predictive coding and decoding method which is a coding and decoding method that can accurately express coefficients which are convertible into linear prediction coefficients with a small code amount and a coding and decoding method that can obtain correctly, by decoding, coefficients which are convertible into linear prediction coefficients of the present frame if a linear prediction coefficient code of the present frame is correctly input to a decoding device.
    Type: Grant
    Filed: May 9, 2023
    Date of Patent: July 30, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Noboru Harada
  • Publication number: 20240233739
    Abstract: An autocorrelation calculation unit 21 calculates an autocorrelation RO(i) from an input signal. A prediction coefficient calculation unit 23 performs linear prediction analysis by using a modified autocorrelation R?O(i) obtained by multiplying a coefficient wO(i) by the autocorrelation RO(i). It is assumed here, for each order i of some orders i at least, that the coefficient wO(i) corresponding to the order i is in a monotonically increasing relationship with an increase in a value that is negatively correlated with a fundamental frequency of the input signal of the current frame or a past frame.
    Type: Application
    Filed: March 25, 2024
    Publication date: July 11, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yutaka KAMAMOTO, Takehiro MORIYA, Noboru HARADA
  • Patent number: 12028093
    Abstract: A sequence of integer values is encoded and decoded with a number of bits of a decimal value substantially assigned per sample or/and with a smaller memory amount or calculation processing amount than in the prior art. The encoder receives the sequence of integer values as input and outputs an integer code corresponding to the sequence of integer values. An integer transformer (11) obtains one integer value (transformed integer) through algebraically-representable bijective transformation for each of a plurality of sets of integer values included in the inputted sequence of integer values. An integer encoder (12) encodes the transformed integer to thereby obtain an integer code.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: July 2, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke Sugiura, Yutaka Kamamoto, Takehiro Moriya
  • Patent number: 12021549
    Abstract: Provided is a technique for converting an integer value sequence for encoding/decoding which allows an integer value sequence having a distribution including small values other than a zero value and greatly biased to small values to be encoded with a small average bit number. Provided are: a unary coding unit which subjects an input sequence of non-negative integer values to unary coding to obtain a unary code sequence; a bit reversing unit which replaces a bit value ‘0’ with a bit value ‘1’ and a bit value ‘1’ with a bit value ‘0’ in the bits in the unary code sequence to obtain a replaced code sequence; and a unary decoding unit which subjects the replaced code sequence to unary decoding to obtain a sequence of non-negative integer values.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: June 25, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke Sugiura, Takehiro Moriya, Yutaka Kamamoto
  • Patent number: 12022031
    Abstract: A technique is provided that can reduce degradation of the sound quality due to a tandem connection of paired coding and decoding, and can reduce the operation processing amount and the required memory amount of a multipoint control unit. In multipoint connection between terminals of a plurality of communication networks (for example, a fixed phone line and a mobile phone line) having different communication capacities, when a multichannel coding including a monaural coding scheme of a communication network having a smaller communication capacity is used in a communication network having a larger communication capacity to transmit sounds of a plurality points to the communication network terminal having the larger communication capacity, control is exercised such that monaural codes of the plurality points are output.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: June 25, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Ryosuke Sugiura
  • Patent number: 11996107
    Abstract: Provided is a technique according to which it is possible to obtain a decoded sound signal of high sound quality without significantly increasing the delay time compared to a configuration in which only a decoded sound signal of the minimum necessary sound quality is obtained. In a terminal apparatus connected to a first communication line and a second communication line with a lower priority level therethan, sound signals of multiple channels are obtained and output based on a monaural code included in a first code string input from the first communication line and an extended code included in a second code string with the closest frame number to that of the monaural code among extended codes included in the second code string input from the second communication line.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: May 28, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Ryosuke Sugiura
  • Patent number: 11972768
    Abstract: An autocorrelation calculation unit 21 calculates an autocorrelation RO(i) from an input signal. A prediction coefficient calculation unit 23 performs linear prediction analysis by using a modified autocorrelation R?O(i) obtained by multiplying a coefficient wO(i) by the autocorrelation RO(i). It is assumed here, for each order i of some orders i at least, that the coefficient wO(i) corresponding to the order i is in a monotonically increasing relationship with an increase in a value that is negatively correlated with a fundamental frequency of the input signal of the current frame or a past frame.
    Type: Grant
    Filed: October 21, 2022
    Date of Patent: April 30, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yutaka Kamamoto, Takehiro Moriya, Noboru Harada
  • Patent number: 11973900
    Abstract: A technique is provided that can reduce degradation of the sound quality due to a tandem connection of paired coding and decoding, and can reduce the operation processing amount and the required memory amount of a multipoint control unit. In multipoint connection between terminals of a plurality of communication networks (for example, a fixed phone line and a mobile phone line) having different communication capacities, when a multichannel coding including a monaural coding scheme of a communication network having a smaller communication capacity is used in a communication network having a larger communication capacity to transmit sounds of a plurality points to the communication network terminal having the larger communication capacity, control is exercised such that monaural codes of the plurality points are output.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: April 30, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Ryosuke Sugiura
  • Publication number: 20240119947
    Abstract: There is provided a technology that improves, in a case where there is a sound signal obtained from a different code that is different from a code from which a decoded sound signal is obtained and that is derived from the same sound signal, the decoded sound signal by using the sound signal obtained from the different code. A signal (hereinafter, referred to as a decoded sound common signal) obtained by downmixing a decoded sound signal of each channel is subjected to signal purification using a monaural decoded sound signal to thereby generate a purified common signal, and in each channel, a signal obtained by upmixing the decoded sound common signal is subtracted from the decoded sound signal and a signal obtained by upmixing the purified common signal is added thereto, to thereby generate a purified decoded sound signal.
    Type: Application
    Filed: November 5, 2020
    Publication date: April 11, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke SUGIURA, Takehiro MORIYA, Yutaka KAMAMOTO
  • Patent number: 11949817
    Abstract: A technique is provided that can reduce degradation of the sound quality due to a tandem connection of paired coding and decoding, and can reduce the operation processing amount and the required memory amount of a multipoint control unit. In multipoint connection between terminals of a plurality of communication networks (for example, a fixed phone line and a mobile phone line) having different communication capacities, when a multichannel coding including a monaural coding scheme of a communication network having a smaller communication capacity is used in a communication network having a larger communication capacity to transmit sounds of a plurality points to the communication network terminal having the larger communication capacity, control is exercised such that monaural codes of the plurality points are output.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: April 2, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Ryosuke Sugiura
  • Publication number: 20240062767
    Abstract: An envelope sequence is provided that can improve approximation accuracy near peaks caused by the pitch period of an audio signal. A periodic-combined-envelope-sequence generation device according to the present invention takes, as an input audio signal, a time-domain audio digital signal in each frame, which is a predetermined time segment, and generates a periodic combined envelope sequence as an envelope sequence. The periodic-combined-envelope-sequence generation device according to the present invention comprises at least a spectral-envelope-sequence calculating part and a periodic-combined-envelope generating part. The spectral-envelope-sequence calculating part calculates a spectral envelope sequence of the input audio signal on the basis of time-domain linear prediction of the input audio signal.
    Type: Application
    Filed: October 25, 2023
    Publication date: February 22, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro MORIYA, Yutaka KAMAMOTO, Noboru HARADA
  • Publication number: 20230410832
    Abstract: For each frame, an n-th channel compensated decoded sound signal {tilde over (?)}X?n is obtained that is a signal obtained by compensating a high frequency of an n-th channel purified decoded sound signal {tilde over (?)}Xn obtained by performing signal processing in a time domain on an n-th channel decoded sound signal {circumflex over (?)}Xn that is a decoded sound signal of each channel of stereo obtained by decoding a stereo code CS.
    Type: Application
    Filed: November 5, 2020
    Publication date: December 21, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke SUGIURA, Takehiro MORIYA, Yutaka KAMAMOTO
  • Patent number: 11848021
    Abstract: An envelope sequence is provided that can improve approximation accuracy near peaks caused by the pitch period of an audio signal. A periodic-combined-envelope-sequence generation device according to the present invention takes, as an input audio signal, a time-domain audio digital signal in each frame, which is a predetermined time segment, and generates a periodic combined envelope sequence as an envelope sequence. The periodic-combined-envelope-sequence generation device according to the present invention comprises at least a spectral-envelope-sequence calculating part and a periodic-combined-envelope generating part. The spectral-envelope-sequence calculating part calculates a spectral envelope sequence of the input audio signal on the basis of time-domain linear prediction of the input audio signal.
    Type: Grant
    Filed: September 29, 2022
    Date of Patent: December 19, 2023
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Noboru Harada
  • Publication number: 20230402044
    Abstract: A sound signal purification method includes a monaural decoded sound upmixing step of obtaining, an n-th channel upmixed monaural decoded sound signal {circumflex over (?)}XMn that is a signal obtained by upmixing a monaural decoded sound signal {circumflex over (?)}XM for each channel by an upmixing process using the monaural decoded sound signal {circumflex over (?)}XM and inter-channel relationship information that is information indicating a relationship between channels of stereo, and an n-th channel signal purification step of obtaining a sequence based on a value {tilde over (?)}xn(t) obtained by adding a value ?n×{circumflex over (?)}xMn(t) obtained by multiplying an n-th channel purification weight ?n by a sample value {circumflex over (?)}xMn(t) of the n-th channel upmixed monaural decoded sound signal {circumflex over (?)}XMn and a value obtained by multiplying a value (1??n) obtained by subtracting the n-th channel purification weight ?n from 1 by a sample value {circumflex over (?)}xn(t) of the n
    Type: Application
    Filed: November 5, 2020
    Publication date: December 14, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke SUGIURA, Takehiro MORIYA, Yutaka KAMAMOTO
  • Publication number: 20230402051
    Abstract: For each frame, an n-th channel compensated decoded sound signal ˜X?n is obtained that is a signal obtained by compensating a high frequency of an n-th channel purified decoded sound signal ˜Xn obtained by performing signal processing in a time domain on an n-th channel decoded sound signal {circumflex over (?)}Xn that is a decoded sound signal of each channel of stereo obtained by decoding a stereo code CS.
    Type: Application
    Filed: November 5, 2020
    Publication date: December 14, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke SUGIURA, Takehiro MORIYA, Yutaka KAMAMOTO
  • Publication number: 20230395081
    Abstract: For each frame, an n-th channel compensated decoded sound signal ˜X?n is obtained that is a signal obtained by compensating a high frequency of an n-th channel purified decoded sound signal ˜Xn obtained by performing signal processing in a time domain on an n-th channel decoded sound signal {circumflex over (?)}Xn (n is each integer of 1 or more and N or less) that is a decoded sound signal of each channel of stereo obtained by decoding a stereo code CS.
    Type: Application
    Filed: November 5, 2020
    Publication date: December 7, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke SUGIURA, Takehiro MORIYA, Yutaka KAMAMOTO
  • Publication number: 20230395080
    Abstract: A sound signal purification method includes an n-th channel signal purification step of obtaining, for each frame and for each corresponding sample t with respect to each channel n, a sequence based on a value ˜xn(t)=(1??n)×{circumflex over (?)}xn(t)+?n×{circumflex over (?)}xM(t) obtained by adding a value ?n×{circumflex over (?)}xM(t) obtained by multiplying an n-th channel purification weight an by a sample value {circumflex over (?)}xM(t) of the monaural decoded sound signal {circumflex over (?)}XM and a value (1??n)×{circumflex over (?)}xn(t) obtained by multiplying a value (1??n) obtained by subtracting the n-th channel purification weight ?n from 1 by a sample value {circumflex over (?)}xn(t) of the n-th channel decoded sound signal {circumflex over (?)}Xn, as the n-th channel purified decoded sound signal ˜Xn.
    Type: Application
    Filed: November 5, 2020
    Publication date: December 7, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke SUGIURA, Takehiro MORIYA, Yutaka KAMAMOTO
  • Publication number: 20230395092
    Abstract: For each frame, an n-th channel compensated decoded sound signal ˜X?n is obtained that is a signal obtained by compensating a high frequency of an n-th channel purified decoded sound signal ˜Xn obtained by performing signal processing in a time domain on an n-th channel decoded sound signal {circumflex over (?)}Xn obtained by decoding a stereo code CS.
    Type: Application
    Filed: November 5, 2020
    Publication date: December 7, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke SUGIURA, Takehiro MORIYA, Yutaka KAMAMOTO
  • Patent number: 11837241
    Abstract: A technique is provided that can reduce degradation of the sound quality due to a tandem connection of paired coding and decoding, and can reduce the operation processing amount and the required memory amount of a multipoint control unit. At a terminal of a communication network having a larger communication capacity in multipoint connection between terminals in a plurality of communication networks (e.g., a fixed phone line and a mobile phone line) having different communication capacities, a multichannel coding including a monaural coding scheme of the communication network having the smaller communication capacity is performed on the coding side, whereas decoding of a multichannel-coded code of one point, decoding of a monaural-coded code of one point, or decoding of a monaural-coded code of a plurality of points is performed on the decoding side in accordance with the input code.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: December 5, 2023
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Ryosuke Sugiura