Invention Grant
- Patent Title: Audio decoding device, audio coding device, audio decoding method, audio coding method, audio decoding program, and audio coding program
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Application No.: US15635191Application Date: 2017-06-27
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Publication No.: US10068584B2Publication Date: 2018-09-04
- Inventor: Kei Kikuiri , Atsushi Yamaguchi
- Applicant: NTT DOCOMO, INC.
- Applicant Address: JP Tokyo
- Assignee: NTT DOCOMO, INC.
- Current Assignee: NTT DOCOMO, INC.
- Current Assignee Address: JP Tokyo
- Agency: Brinks Gilson & Lione
- Priority: JP2012-103519 20120427; JP2012-254496 20121120
- Main IPC: G10L19/02
- IPC: G10L19/02 ; G10L19/03 ; G10L19/26 ; G10L19/24 ; G10L21/038

Abstract:
An objective of the present invention is to correct a temporal envelope shape of a decoded signal with a small information volume and to reduce perceptible distortions. An audio decoding device which decodes a coded audio signal and outputs an audio signal comprises: a coded series analysis unit that analyzes a coded series which contains the coded audio signal; an audio decoding unit that receives from the coded series analysis unit the coded series which contains the coded audio signal and decodes same, obtaining an audio signal; a temporal envelope shape establishment unit that receives information from the coded series analysis unit and/or the audio decoding unit, and, on the basis of the information, establishes a temporal envelope shape of the decoded audio signal; and a temporal envelope correction unit that, on the basis of the temporal envelope shape which is established with the temporal envelope shape establishment unit, corrects the temporal envelope shape of the decoded audio signal and outputs same.
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