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:
Jul. 29, 2025
Filed:
Nov. 05, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
For each frame, an n-th channel compensated decoded sound signalX'is obtained that is a signal obtained by compensating a high frequency of an n-th channel purified decoded sound signalXobtained by performing signal processing in a time domain on an n-th channel decoded sound signal {circumflex over ( )}Xobtained by decoding a stereo code CS. At this time, {circumflex over ( )}Xis selected in a case where the number of bits bcorresponding to an n-th channel in the number of bits of CS is larger than the number of bits bof a monaural code CM, or a monaural decoded sound signal obtained by decoding CM or a signal obtained by upmixing the monaural decoded sound signal for the n-th channel is selected in a case where bis smaller than b, an n-th channel high-frequency compensation gain ρthat is a value for bringing the high-frequency energy ofX′close to the high-frequency energy of {circumflex over ( )}Xis obtained, and a signal obtained by addingXand a signal obtained by multiplying a high-frequency component of the selected signal by ρis obtained and output as an n-th channel compensated decoded sound signal.