US 11,657,788 B2
Efficient combined harmonic transposition
Per Ekstrand, Saltsjobaden (SE); Lars Villemoes, Järfälla (SE); and Per Hedelin, Gothenburg (SE)
Assigned to DOLBY INTERNATIONAL AB, Dublin (IE)
Filed by Dolby International AB, Amsterdam Zuidoost (NL)
Filed on Dec. 13, 2021, as Appl. No. 17/549,661.
Application 17/549,661 is a continuation of application No. 16/876,793, filed on May 18, 2020, granted, now 11,200,874.
Application 16/876,793 is a continuation of application No. 16/376,433, filed on Apr. 5, 2019, granted, now 10,657,937, issued on May 19, 2020.
Application 16/376,433 is a continuation of application No. 15/849,915, filed on Dec. 21, 2017, granted, now 10,304,431, issued on May 28, 2019.
Application 15/849,915 is a continuation of application No. 14/882,559, filed on Oct. 14, 2015, granted, now 9,881,597, issued on Jan. 30, 2018.
Application 14/882,559 is a continuation of application No. 14/614,172, filed on Feb. 4, 2015, granted, now 9,190,067, issued on Nov. 17, 2015.
Application 14/614,172 is a continuation of application No. 13/321,910, granted, now 8,983,852, issued on Mar. 17, 2015, previously published as PCT/EP2010/057176, filed on May 25, 2010.
Claims priority of provisional application 61/312,107, filed on Mar. 9, 2010.
Claims priority of provisional application 61/181,364, filed on May 27, 2009.
Prior Publication US 2022/0180849 A1, Jun. 9, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 21/038 (2013.01); G10H 1/00 (2006.01); G10L 19/26 (2013.01); G10H 1/12 (2006.01); G10L 21/0388 (2013.01)
CPC G10H 1/0091 (2013.01) [G10H 1/125 (2013.01); G10L 19/265 (2013.01); G10L 21/038 (2013.01); G10H 2210/311 (2013.01); G10L 21/0388 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An audio signal processing device comprising one or more processors configured to generate a high frequency component of a signal from a low frequency component of the signal, wherein the one or more processors:
provide a set of analysis subband signals from the low frequency component of the signal; wherein the set of analysis subband signals comprises at least two analysis subband signals;
determine a set of synthesis subband signals from the set of analysis subband signals;
wherein the nonlinear processing unit is configured to determine an nth synthesis subband signal of the set of synthesis subband signals from a kth analysis subband signal and a (k+l)th analysis subband signal of the set of analysis subband signals; wherein a magnitude of the nth synthesis subband signal is determined from a product of an exponentiated magnitude of the kth analysis subband signal and an exponentiated magnitude of the (k+1)th analysis subband signal; wherein a sum of an exponent of the exponentiated magnitude of the kth analysis subband signal and an exponent of the exponentiated magnitude of the (k+1)th analysis subband signal equals one; and
generate the high frequency component of the signal based on the set of synthesis subband signals.