US 12,394,428 B2
Audio signal processing method and mobile apparatus
Po-Jen Tu, New Taipei (TW); Jia-Ren Chang, New Taipei (TW); and Kai-Meng Tzeng, New Taipei (TW)
Assigned to Acer Incorporated, New Taipei (TW)
Filed by Acer Incorporated, New Taipei (TW)
Filed on Apr. 28, 2023, as Appl. No. 18/308,680.
Claims priority of application No. 111148595 (TW), filed on Dec. 16, 2022.
Prior Publication US 2024/0203441 A1, Jun. 20, 2024
Int. Cl. G10L 21/0308 (2013.01); G10L 25/06 (2013.01); H04R 1/02 (2006.01); H04R 1/40 (2006.01); H04R 3/00 (2006.01)
CPC G10L 21/0308 (2013.01) [G10L 25/06 (2013.01); H04R 1/028 (2013.01); H04R 1/406 (2013.01); H04R 3/005 (2013.01); H04R 2499/15 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An audio signal processing method, suitable for a mobile apparatus and an external microphone (mic), the mobile apparatus communicatively connecting to the external microphone, the mobile apparatus comprising an embedded microphone (mic), the audio signal processing method comprising:
determining a target direction in a plurality of sound-reception directions and a target distance corresponding to the target direction according to a plurality of first audio signals in the sound-reception directions received by the embedded microphone, wherein a primary sound source is located in the target direction and at the target distance from the embedded microphone, the target direction is determined based on a correlation between the first audio signals and a second audio signal received by the external microphone, and the target distance is determined based on signal power of a first audio signal in the target direction;
selecting a target algorithm from a plurality of blind signal separation (BSS) algorithms according to the target direction and the target distance, wherein the target algorithm is determined based on an included angle between the target direction and an interference source sound direction and a magnitude of the target distance, and the interference source sound direction corresponds to an interference sound source; and
setting the first audio signal received by the embedded microphone at the target direction as a secondary signal of the target algorithm, setting the second audio signal received by the external microphone as a primary signal of the target algorithm, and separating an audio signal of the primary sound source from the primary signal and the secondary signal through the target algorithm.