US 11,705,138 B2
Inter-channel bandwidth extension spectral mapping and adjustment
Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Seattle, WA (US); and Venkatraman Atti, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Dec. 11, 2020, as Appl. No. 17/120,067.
Application 17/120,067 is a continuation of application No. 16/673,733, filed on Nov. 4, 2019, granted, now 10,872,613.
Application 16/673,733 is a continuation of application No. 15/890,670, filed on Feb. 7, 2018, granted, now 10,553,222, issued on Feb. 4, 2020.
Claims priority of provisional application 62/469,432, filed on Mar. 9, 2017.
Prior Publication US 2021/0098006 A1, Apr. 1, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); H04S 5/02 (2006.01); G10L 19/16 (2013.01); H04R 3/12 (2006.01); G10L 21/038 (2013.01); H04R 3/00 (2006.01); H04S 1/00 (2006.01); G10L 19/02 (2013.01)
CPC G10L 19/008 (2013.01) [G10L 19/167 (2013.01); G10L 21/038 (2013.01); H04R 3/005 (2013.01); H04R 3/12 (2013.01); H04S 1/007 (2013.01); H04S 5/02 (2013.01); G10L 19/0204 (2013.01); H04S 2400/15 (2013.01); H04S 2420/07 (2013.01)] 36 Claims
OG exemplary drawing
 
1. A device comprising:
an encoder configured to:
identify a non-reference target channel based on temporal shift values in a current frame;
generate a high-band portion of the non-reference target channel;
generate a synthesized non-reference high-band channel based on a non-reference high- band excitation corresponding to the non-reference target channel;
generate one or more spectral mapping parameters based on a maximum-likelihood measure applied to the synthesized non-reference high-band channel and the high-band portion of the non-reference target channel;
apply the one or more spectral mapping parameters to the synthesized non-reference high- band channel to generate a spectrally shaped synthesized non-reference high-band channel; and
generate an encoded bitstream based on the one or more spectral mapping parameters and the spectrally shaped synthesized non-reference high-band channel.