US 11,688,406 B2
High-band encoding method and device, and high-band decoding method and device
Ki-hyun Choo, Seoul (KR); and Eun-mi Oh, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Dec. 30, 2020, as Appl. No. 17/138,106.
Application 17/138,106 is a continuation of application No. 16/592,876, filed on Oct. 4, 2019, granted, now 10,909,993.
Application 16/592,876 is a continuation of application No. 15/129,184, granted, now 10,468,035, issued on Nov. 5, 2019, previously published as PCT/IB2015/001365, filed on Mar. 24, 2015.
Claims priority of provisional application 62/029,718, filed on Jul. 28, 2014.
Claims priority of provisional application 61/969,368, filed on Mar. 24, 2014.
Prior Publication US 2021/0118451 A1, Apr. 22, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/002 (2013.01); G10L 21/038 (2013.01); G10L 19/02 (2013.01)
CPC G10L 19/002 (2013.01) [G10L 19/02 (2013.01); G10L 19/0204 (2013.01); G10L 21/038 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for encoding an audio signal, the method comprising:
generating an envelope of a low band of a spectrum based on a sub-band configuration of a full band, and quantizing the envelope of the low band;
generating an envelope of a high band of the spectrum based on a sub-band configuration of the high band and quantizing the envelope of the high band;
generating a mapped envelope of the high band by mapping the envelope of the high band into a sub-band configuration of the full band, and quantizing the mapped envelope;
generating an envelope of the full band by combining the quantized mapped envelope of the high band with the quantized envelope of the low band;
determining to perform envelope refinement if there is any sub-band to which a bit is allocated in the high band based on bit allocation information of the envelope of the full band; and
in response to determining to perform the envelope refinement, calculating a delta of norm which is a difference between the mapped envelope and an envelope from an original spectrum for the sub-band to which the bit is allocated in the high band, and generating a bitstream including the delta of norm.