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:
Sep. 02, 2025
Filed:
Nov. 05, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
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 ( )}Xthat is a signal obtained by upmixing a monaural decoded sound signal {circumflex over ( )}Xfor each channel by an upmixing process using the monaural decoded sound signal {circumflex over ( )}Xand 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 ( )}x(t) obtained by adding a value α×{circumflex over ( )}x(t) obtained by multiplying an n-th channel purification weight αby a sample value {circumflex over ( )}x(t) of the n-th channel upmixed monaural decoded sound signal {circumflex over ( )}Xand a value obtained by multiplying a value (1−α) obtained by subtracting the n-th channel purification weight αfrom 1 by a sample value {circumflex over ( )}x(t) of the n-th channel decoded sound signal {circumflex over ( )}X.