Patents by Inventor Kouichi FURUKADO

Kouichi FURUKADO 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).

  • Sample sequence converter, signal encoding apparatus, signal decoding apparatus, sample sequence converting method, signal encoding method, signal decoding method and program
    Patent number: 11468905
    Abstract: Performance of an encoding process and a decoding process for a sound signal is enhanced. A representative value calculating part 110 calculates, for each frequency section by a plurality of samples fewer than the number of frequency samples of a sample sequence of a frequency domain signal corresponding to an input acoustic signal, from the sample sequence of the frequency domain signal, a representative value of the frequency section from sample values of samples included in the frequency section, for each of predetermined time sections. A signal companding part 120 obtains, for each of the predetermined time sections, a frequency domain sample sequence obtained by multiplying a weight according to a function value of the representative value by a companding function for which an inverse function can be defined and each of the samples corresponding to the representative value in the sample sequence of the frequency domain signal, as a sample sequence of a weighted frequency domain signal.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: October 11, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke Sugiura, Takehiro Moriya, Noboru Harada, Takahito Kawanishi, Yutaka Kamamoto, Kouichi Furukado, Junichi Nakajima, Jouji Nakayama, Kenichi Noguchi, Keisuke Hasegawa
  • SAMPLE SEQUENCE CONVERTER, SIGNAL ENCODING APPARATUS, SIGNAL DECODING APPARATUS, SAMPLE SEQUENCE CONVERTING METHOD, SIGNAL ENCODING METHOD, SIGNAL DECODING METHOD AND PROGRAM
    Publication number: 20210335372
    Abstract: Performance of an encoding process and a decoding process for a sound signal is enhanced. A representative value calculating part 110 calculates, for each frequency section by a plurality of samples fewer than the number of frequency samples of a sample sequence of a frequency domain signal corresponding to an input acoustic signal, from the sample sequence of the frequency domain signal, a representative value of the frequency section from sample values of samples included in the frequency section, for each of predetermined time sections. A signal companding part 120 obtains, for each of the predetermined time sections, a frequency domain sample sequence obtained by multiplying a weight according to a function value of the representative value by a companding function for which an inverse function can be defined and each of the samples corresponding to the representative value in the sample sequence of the frequency domain signal, as a sample sequence of a weighted frequency domain signal.
    Type: Application
    Filed: September 13, 2017
    Publication date: October 28, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryosuke SUGIURA, Takehiro MORIYA, Noboru HARADA, Takahito KAWANISHI, Yutaka KAMAMOTO, Kouichi FURUKADO, Junichi NAKAJIMA, Jouji NAKAYAMA, Kenichi NOGUCHI, Keisuke HASEGAWA