US 12,279,104 B1
Loudness adjustment for downmixed audio content
Michael C. Ward, Orinda, CA (US); Jeffrey Riedmiller, Novato, CA (US); Scott Gregory Norcross, San Rafael, CA (US); and Alexander Stahlmann, Bubenreuth (DE)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US); and DOLBY INTERNATIONAL AB, Dublin (IE)
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US); and DOLBY INTERNATIONAL AB, Dublin (IE)
Filed on Dec. 17, 2024, as Appl. No. 18/984,971.
Application 16/505,448 is a division of application No. 16/115,292, filed on Aug. 28, 2018, granted, now 10,368,181, issued on Jul. 30, 2019.
Application 18/984,971 is a continuation of application No. 18/084,447, filed on Dec. 19, 2022, granted, now 12,185,077.
Application 18/084,447 is a continuation of application No. 17/240,901, filed on Apr. 26, 2021, granted, now 11,533,575, issued on Dec. 20, 2022.
Application 17/240,901 is a continuation of application No. 16/882,745, filed on May 26, 2020, granted, now 10,993,062, issued on Apr. 27, 2021.
Application 16/882,745 is a continuation of application No. 16/505,448, filed on Jul. 8, 2019, granted, now 10,674,302, issued on Jun. 2, 2020.
Application 16/115,292 is a continuation of application No. 15/625,749, filed on Jun. 16, 2017, granted, now 10,070,243, issued on Sep. 4, 2018.
Application 15/625,749 is a continuation of application No. 15/091,366, filed on Apr. 5, 2016, granted, now 9,686,624, issued on Jun. 20, 2017.
Application 15/091,366 is a continuation of application No. 14/916,522, granted, now 9,521,501, issued on Dec. 13, 2016, previously published as PCT/US2014/054718, filed on Sep. 9, 2014.
Claims priority of provisional application 61/938,043, filed on Feb. 10, 2014.
Claims priority of provisional application 61/892,313, filed on Oct. 17, 2013.
Claims priority of provisional application 61/891,324, filed on Oct. 15, 2013.
Claims priority of provisional application 61/877,230, filed on Sep. 12, 2013.
This patent is subject to a terminal disclaimer.
Int. Cl. H04S 7/00 (2006.01); G10L 19/008 (2013.01); G10L 21/0324 (2013.01); H04S 1/00 (2006.01)
CPC H04S 7/30 (2013.01) [G10L 19/008 (2013.01); G10L 21/0324 (2013.01); H04S 1/002 (2013.01); H04S 1/007 (2013.01); H04S 2400/03 (2013.01); H04S 2400/13 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for loudness adjustment of at least an audio signal, the method comprising:
receiving, by an audio decoder, the audio signal comprising audio sample data for a reference channel configuration and encoder-generated loudness metadata corresponding to a plurality of specific channel configurations, wherein the audio decoder is configured to operate in at least one of the plurality of specific channel configurations;
selecting a specific playback environment corresponding to one of the plurality of specific channel configurations;
selecting specific loudness metadata based on the encoder-generated loudness metadata and the specific playback environment;
determining loudness information based on the specific loudness metadata;
determining at least a gain as a part of overall gains to applied to the audio sample data based on the loudness information; and
applying the gain to the audio sample data to generate output audio.