US 12,334,082 B2
Advanced stereo coding based on a combination of adaptively selectable left/right or mid/side stereo coding and of parametric stereo coding
Heiko Purnhagen, Sundyberg (SE); Pontus Carlsson, Bromma (SE); and Kristofer Kjoerling, Solna (SE)
Assigned to DOLBY INTERNATIONAL AB, Dublin (IE)
Filed by DOLBY INTERNATIONAL AB, Dublin (IE)
Filed on Jan. 17, 2025, as Appl. No. 19/030,501.
Application 16/434,059 is a division of application No. 16/369,728, filed on Mar. 29, 2019, granted, now 11,017,785, issued on May 25, 2021.
Application 19/030,501 is a continuation of application No. 18/543,365, filed on Dec. 18, 2023.
Application 18/543,365 is a continuation of application No. 17/728,692, filed on Apr. 25, 2022, granted, now 12,223,966.
Application 17/728,692 is a continuation of application No. 16/434,059, filed on Jun. 6, 2019, granted, now 11,315,576, issued on Apr. 26, 2022.
Application 16/369,728 is a continuation of application No. 15/873,083, filed on Jan. 17, 2018, granted, now 10,297,259, issued on May 21, 2019.
Application 15/873,083 is a continuation of application No. 14/734,088, filed on Jun. 9, 2015, granted, now 9,905,230, issued on Feb. 27, 2018.
Application 14/734,088 is a continuation of application No. 13/255,143, granted, now 9,082,395, issued on Jul. 14, 2015, previously published as PCT/EP2010/052866, filed on Mar. 5, 2010.
Claims priority of provisional application 61/219,484, filed on Jun. 23, 2009.
Claims priority of provisional application 61/160,707, filed on Mar. 17, 2009.
Prior Publication US 2025/0166636 A1, May 22, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/002 (2013.01); G10L 19/008 (2013.01); G10L 19/18 (2013.01); H04S 3/02 (2006.01); H04S 5/00 (2006.01); H04S 5/02 (2006.01)
CPC G10L 19/002 (2013.01) [G10L 19/008 (2013.01); H04S 3/02 (2013.01); H04S 5/00 (2013.01); H04S 5/005 (2013.01); H04S 5/02 (2013.01); G10L 19/18 (2013.01); H04S 2400/01 (2013.01); H04S 2400/03 (2013.01); H04S 2420/03 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An audio signal processing device for encoding a stereo signal to a bitstream signal, the audio signal processing device comprising one or more components that:
generate a downmix signal, a residual signal, and one or more parametric stereo parameters based on the stereo signal, wherein the residual signal indicates an error associated with representing the stereo signal by the downmix signal and the one or more parametric stereo parameters and wherein the one or more parametric stereo parameters comprise a parameter indicating a channel level difference;
generate, in a frequency-variant or frequency-invariant manner, a first signal and a second signal based on either:
a sum of the downmix signal and the residual signal and a difference of the downmix signal and the residual signal; or
the downmix signal and the residual signal;
generate an encoded stereo signal by perceptual encoding the first signal and the second signal; and
generate the bitstream signal by combining the one or more parametric stereo parameters and the encoded stereo signal.