US 11,930,337 B2
Audio encoding with compressed ambience
Tomlinson Holman, Palm Springs, CA (US); Christopher T. Eubank, Santa Barbara, CA (US); Joshua D. Atkins, Los Angeles, CA (US); Soenke Pelzer, San Jose, CA (US); and Dirk Schroeder, Sunnyvale, CA (US)
Assigned to Apple Inc, Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jun. 28, 2021, as Appl. No. 17/360,825.
Application 17/360,825 is a continuation of application No. PCT/US2020/055774, filed on Oct. 15, 2020.
Claims priority of provisional application 62/927,244, filed on Oct. 29, 2019.
Prior Publication US 2021/0329381 A1, Oct. 21, 2021
Int. Cl. G10L 19/16 (2013.01); G10L 21/0208 (2013.01); G10L 21/0216 (2013.01); H04R 3/00 (2006.01); H04R 3/04 (2006.01); H04R 5/027 (2006.01); H04R 5/033 (2006.01); H04R 5/04 (2006.01)
CPC H04R 5/027 (2013.01) [G10L 19/167 (2013.01); G10L 21/0216 (2013.01); H04R 3/005 (2013.01); H04R 3/04 (2013.01); H04R 5/033 (2013.01); H04R 5/04 (2013.01); G10L 2021/02082 (2013.01); G10L 2021/02166 (2013.01); H04R 2420/07 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by an audio device, comprising:
sensing sound in a physical environment using a plurality of microphones to generate a plurality of microphone signals;
extracting clean speech from at least a portion of the plurality of microphone signals;
extracting ambience from at least a portion of the plurality of microphone signals; and
encoding, in a bit stream, the clean speech and the ambience by a) compressing the clean speech into an encoded speech signal at a first bit rate, and b) compressing the ambience into an encoded ambience signal at a second bit rate that is lower than the first bit rate.