	US 12,230,283 B2
	Stereo signal processing method and apparatus
Eyal Shlomot, Long Beach, CA (US); Haiting Li, Beijing (CN); and Lei Miao, Beijing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Aug. 14, 2023, as Appl. No. 18/449,281.
Application 18/449,281 is a continuation of application No. 17/512,202, filed on Oct. 27, 2021, granted, now 11,763,825.
Application 17/512,202 is a continuation of application No. 16/682,484, filed on Nov. 13, 2019, granted, now 11,200,907, issued on Dec. 14, 2021.
Application 16/682,484 is a continuation of application No. PCT/CN2017/116204, filed on Dec. 14, 2017.
Claims priority of application No. 201710344704.4 (CN), filed on May 16, 2017.
Prior Publication US 2023/0395083 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); H04S 1/00 (2006.01)

CPC G10L 19/008 (2013.01) [H04S 1/007 (2013.01); H04S 2420/03 (2013.01)]

20 Claims

1. A method comprising:

obtaining a pulse-code modulation (PCM) audio signal;

obtaining a first inter-channel time difference (ITD) of a current frame based on the PCM audio signal, wherein the first ITD is a time difference between a first-channel signal of the current frame and a second-channel signal of the current frame, and wherein a first sign of the first ITD is either a positive sign or a negative sign;

performing, when the first sign is different from a second sign of a second ITD of a previous frame adjacent to the current frame, a first delay alignment processing on the first-channel signal based on the first ITD to obtain a third signal;

performing, when the first sign is different from the second sign, a second delay alignment processing on the second-channel signal based on the second ITD to obtain a fourth signal;

performing a mid/side (M/S) downmix processing on the third signal and the fourth signal to obtain a fifth signal and a sixth signal; and

encoding the fifth signal and the sixth signal.