US 12,069,466 B2
Systems and methods for audio upmixing
Christos Kyriakakis, Venice, CA (US); Matthias Kronlachner, Venice, CA (US); and Lasse Vetter, Venice, CA (US)
Assigned to SYNG, Inc., Marina del Ray, CA (US)
Filed by SYNG, Inc., Marina del Ray, CA (US)
Filed on Dec. 15, 2021, as Appl. No. 17/300,939.
Claims priority of provisional application 63/125,896, filed on Dec. 15, 2020.
Prior Publication US 2022/0400351 A1, Dec. 15, 2022
Int. Cl. H04S 5/00 (2006.01); G10L 21/0232 (2013.01); H04R 5/04 (2006.01)
CPC H04S 5/005 (2013.01) [G10L 21/0232 (2013.01); H04R 5/04 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A method for upmixing audio, comprising:
receiving an audio track comprising an input plurality of channels, each channel having an encoded audio signal;
decoding the audio signals;
for each decoded audio signal:
calculating a first frequency spectrum for a low frequency component of the decoded audio signal using a first window;
calculating a second frequency spectrum for a high frequency component of the decoded audio signal using a second window;
assigning components from the first and second frequency spectrums to at least one direct signal by estimating panning coefficients of the decoded audio signals;
estimating at least one ambient signal based on the at least one direct signal; and
generating an output plurality of channels based on the at least one direct signal and the at least one ambient signal.