Patent ID: 11863952
Assignee: DOLBY LABORATORIES LICENSING CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A computer-implemented method, comprising:
receiving a plurality of audio signals from a plurality of microphones of a mobile device, each audio signal in the plurality of audio signals being generated by a respective microphone in the plurality of microphones;
selecting one or more first microphones from among the plurality of microphones to generate a front audio signal m1;
selecting one or more second microphones from among the plurality of microphones to generate a back audio signal m2;
removing a first audio signal portion from the front audio signal m1 to generate a modified front audio signal Sf, the first audio signal portion being determined based at least in part on the back audio signal m2;
wherein the first audio signal portion is obtained by applying a back-to-front transfer function H21(z) to the back audio signal m2; wherein the back-to-front transfer function H21(z) relates a first response of the one or more first microphones to a test back sound to a second response of the one or more second microphones to the test back sound, wherein the back-to-front transfer function H21(z) is determined beforehand based at least in part on the test back sound;
using the modified front audio signal Sf in place of the front audio signal m1 in subsequent audio processing operations.