Title:
ダウンミックスされた信号の計算方法及び装置
Document Type and Number:
Japanese Patent JP7159351
Kind Code:
B2
Abstract:
This application relates to the audio signal processing field, and discloses a downmixed signal calculation method and apparatus, to resolve a problem that there is a discontinuous spatial sense and poor sound image stability of a decoded stereo signal. The method includes: when a previous frame of a current frame of a stereo signal is not a switching frame and a residual signal in the previous frame does not need to be encoded, or when a current frame is not a switching frame and a residual signal in the current frame does not need to be encoded, calculating a first downmixed signal in the current frame, and determining the first downmixed signal in the current frame as a downmixed signal in the current frame in a preset frequency band, where the calculating a first downmixed signal in the current frame specifically includes: obtaining a second downmixed signal in the current frame (S402a) and a downmix compensation factor of the current frame (S402b), and correcting the second downmixed signal in the current frame based on the downmix compensation factor of the current frame, to obtain the first downmixed signal in the current frame (S402c).
Inventors:
Li, Haitin
Riu, Zesin
One, bottle
Riu, Zesin
One, bottle
Application Number:
JP2020564202A
Publication Date:
October 24, 2022
Filing Date:
January 02, 2019
Export Citation:
Assignee:
Huawei Technologies Company Limited
International Classes:
G10L19/008
Domestic Patent References:
| JP2014535183A | ||||
| JP2009500658A |
Other References:
"Wideband embedded extension for ITU-T G.711 pulse code modulation",ITU-T Recommendation,2012年09月,pp.139-178
Attorney, Agent or Firm:
Patent Attorney Corporation RYUKA International Patent Office
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