US 11,900,952 B2
Time-domain stereo encoding and decoding method and related product
Bin Wang, Shenzhen (CN); Haiting Li, Beijing (CN); and Lei Miao, Beijing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed by Huawei Technologies Co., Ltd., Guangdong (CN)
Filed on May 18, 2022, as Appl. No. 17/663,913.
Application 17/663,913 is a continuation of application No. 16/784,759, filed on Feb. 7, 2020, granted, now 11,355,131.
Application 16/784,759 is a continuation of application No. PCT/CN2018/100088, filed on Aug. 10, 2018.
Claims priority of application No. 201710680152.4 (CN), filed on Aug. 10, 2017.
Prior Publication US 2022/0310101 A1, Sep. 29, 2022
Int. Cl. G10L 19/008 (2013.01); G10L 19/22 (2013.01)
CPC G10L 19/008 (2013.01) [G10L 19/22 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An audio signal decoding method, comprising:
receiving a bitstream;
obtaining a third channel signal and a fourth channel signal of a current frame of an audio signal from the bitstream;
when a first signal type of the current frame is different from a second signal type of a previous frame of the audio signal, performing a segmented mix processing on the third channel signal and the fourth channel signal to obtain a first channel signal and a second channel signal;
wherein the first signal type is either a near out of phase signal type or a near in phase signal type, wherein the current frame includes the first channel signal and the second channel signal;
wherein each of the first channel signal, the second channel signal, the third channel signal, and the fourth channel signal comprises a start segment signal, a middle segment signal and an end segment signal;
when the first signal type is the near out of phase signal type and the second signal type is the near in phase signal type, performing, by using a second ratio factor corresponding to the previous frame and a second mix processing manner corresponding to the previous frame, a start segment mix processing on the start segment signal of the third channel signal and the start segment signal of the fourth channel signal, to obtain the start segment signal of the first channel signal and the start segment signal of the second channel signal;
performing, by using a first ratio factor corresponding to the current frame and a first mix processing manner corresponding to the current frame, an end segment mix processing on the end segment signal of the third channel signal and the end segment signal of the fourth channel signal, to obtain the end segment signal of the first channel signal and the end segment signal of the second channel signal;
performing, by using the first ratio factor and the first mix processing manner, a middle segment mix processing on the middle segment signal of the third channel signal and the middle segment signal of the fourth channel signal, to obtain a first temporary middle segment signal and a second temporary middle segment signal;
performing, by using the second ratio factor and the second mix processing manner, a middle segment mix processing on the middle segment signal of the third channel signal and the middle segment signal of the fourth channel signal, to obtain a third temporary middle segment signal and a fourth temporary middle segment signal; and
performing a weighted summation processing on the first temporary middle segment signal, the second temporary middle segment signal, the third temporary middle segment signal and the fourth temporary middle segment signal to obtain the middle segment signal of the first channel signal and the middle segment signal of the second channel signal.