US 11,817,108 B2
Methods for parametric multi-channel encoding
Tobias Friedrich, Furth (DE); Alexander Mueller, Nuremberg (DE); Karsten Linzmeier, Nuremberg (DE); Claus-Christian Spenger, Nuremberg (DE); and Tobias R. Wagenblass, Nuremberg (DE)
Assigned to DOLBY INTERNATIONAL AB, Dublin (IE)
Filed by DOLBY INTERNATIONAL AB, Dublin (IE)
Filed on Oct. 28, 2022, as Appl. No. 17/975,955.
Application 17/975,955 is a continuation of application No. 17/177,217, filed on Feb. 17, 2021, granted, now 11,488,611.
Application 17/177,217 is a continuation of application No. 16/864,694, filed on May 1, 2020, granted, now 10,930,291, issued on Feb. 23, 2021.
Application 16/864,694 is a continuation of application No. 16/436,835, filed on Jun. 10, 2019, granted, now 10,643,626, issued on May 5, 2020.
Application 16/436,835 is a continuation of application No. 15/646,482, filed on Jul. 11, 2017, granted, now 10,360,919, issued on Jul. 23, 2019.
Application 15/646,482 is a continuation of application No. 14/767,883, granted, now 9,715,880, issued on Jul. 25, 2017, previously published as PCT/EP2014/053475, filed on Feb. 21, 2014.
Claims priority of provisional application 61/767,673, filed on Feb. 21, 2013.
Prior Publication US 2023/0123244 A1, Apr. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); G10L 19/16 (2013.01); H04S 3/00 (2006.01)
CPC G10L 19/008 (2013.01) [G10L 19/167 (2013.01); H04S 3/008 (2013.01); H04S 2400/01 (2013.01); H04S 2400/03 (2013.01); H04S 2420/03 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, by an audio processor, a multi-channel input audio signal;
determining a first set of dynamic range control (DRC) values configured for controlling a dynamic range of an output audio signal;
determining a second set of DRC values configured for preventing the multi-channel input audio signal from clipping during downmixing by the audio processor;
applying the second set of DRC values to the multi-channel input audio signal to obtain an attenuated multi-channel input audio signal;
downmixing the attenuated multi-channel input audio signal to obtain a downmix signal, wherein the downmixing is frequency-invariant; and
generating the output audio signal from the first set of DRC values and the downmix audio signal.