The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2022
Filed:
Sep. 13, 2017
Nippon Telegraph and Telephone Corporation, Chiyoda-ku, JP;
Ryosuke Sugiura, Atsugi, JP;
Takehiro Moriya, Atsugi, JP;
Noboru Harada, Atsugi, JP;
Takahito Kawanishi, Atsugi, JP;
Yutaka Kamamoto, Atsugi, JP;
Kouichi Furukado, Yokosuka, JP;
Junichi Nakajima, Yokosuka, JP;
Jouji Nakayama, Musashino, JP;
Kenichi Noguchi, Yokosuka, JP;
Keisuke Hasegawa, Yokosuka, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Chiyoda-ku, JP;
Abstract
Performance of an encoding process and a decoding process for a sound signal is enhanced. A representative value calculating partcalculates, 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 partobtains, 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.