US 12,342,140 B2
Signal processing device and method for reducing doppler distortion
Michiaki Yoneda, Tokyo (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 18/004,250
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed Jun. 30, 2021, PCT No. PCT/JP2021/024669
§ 371(c)(1), (2) Date Jan. 4, 2023,
PCT Pub. No. WO2022/014325, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 2020-120706 (JP), filed on Jul. 14, 2020.
Prior Publication US 2023/0269535 A1, Aug. 24, 2023
Int. Cl. H04R 3/08 (2006.01); H04R 29/00 (2006.01)
CPC H04R 3/08 (2013.01) [H04R 29/001 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A signal processing device, comprising:
a displacement prediction unit configured to predict a displacement of a diaphragm of a speaker based on an audio signal, wherein
the audio signal includes a high frequency signal and a low frequency signal, and
the speaker plays back a sound based on the audio signal;
a conversion unit configured to determine a correction time based on the predicted displacement and an acoustic velocity associated with the audio signal; and
a correction unit configured to correct the audio signal based on the determined correction time and an interpolation process, wherein
the interpolation process is based on at least three samples of the audio signal.