公开(公告)号：US20220223135A1

公开(公告)日：2022-07-14

申请号：US17147771

申请日：2021-01-13

Applicant: Apple Inc.

Inventor： Sorin Dusan

IPC: G10K11/178 ,  H04R3/00 ,  H04R29/00

Abstract: A remote microphone signal is obtained from a remote device, and a local microphone signal from a local device. A difference between strength of the remote microphone signal and strength of the local microphone signal is determined. An output audio signal is produced to drive a speaker in the local device. If the difference is greater than a threshold, then the local and remote microphone signals are applied to two input channels, respectively, of a two channel noise suppressor which produces the output audio signal, but if the difference is less than the threshold after a certain delay since the difference was greater than the threshold, then only the remote microphone signal is applied to a single input of a single channel noise suppressor which produces the output audio signal. Other aspects are also described and claimed.

公开(公告)号：US10431238B1

公开(公告)日：2019-10-01

申请号：US15999120

申请日：2018-08-17

Applicant: Apple Inc.

Inventor： Dubravko Biruski ,  Sorin Dusan

IPC: G10L21/0232 ,  H04R3/00 ,  H04R1/40

Abstract: A digital processor-based memory-efficient and computation-efficient audio signal processing technique partitions each of two audio signals into shorter segments and combines the shorter segments into combined segments. A processor cross-correlates the first combined segment and the second combined segment into a cross-correlation result, which is written into a cross-correlation array. The result may be used for delay estimation (to estimate the relative delay between the two audio signals.) Other aspects are also described and claimed.

公开(公告)号：US11527232B2

公开(公告)日：2022-12-13

申请号：US17147771

申请日：2021-01-13

Applicant: Apple Inc.

Inventor： Sorin Dusan

IPC: G10K11/178 ,  H04R29/00 ,  H04R3/00

Abstract: A remote microphone signal is obtained from a remote device, and a local microphone signal from a local device. A difference between strength of the remote microphone signal and strength of the local microphone signal is determined. An output audio signal is produced to drive a speaker in the local device. If the difference is greater than a threshold, then the local and remote microphone signals are applied to two input channels, respectively, of a two channel noise suppressor which produces the output audio signal, but if the difference is less than the threshold after a certain delay since the difference was greater than the threshold, then only the remote microphone signal is applied to a single input of a single channel noise suppressor which produces the output audio signal. Other aspects are also described and claimed.

公开(公告)号：US10332538B1

公开(公告)日：2019-06-25

申请号：US15999121

申请日：2018-08-17

Applicant: Apple Inc.

Inventor： Sorin Dusan ,  Dubravko Biruski

IPC: H04R3/00 ,  G10L21/02 ,  H04R25/00 ,  G10L21/0232 ,  H04R1/10 ,  H04R1/40

Abstract: A speech enhancement system for a remote microphone has a wireless receiver that receives a signal from a first microphone of a remote device. A delay buffer receives a second microphone signal from a second microphone and delays by an adjustable delay. The adjustable delay is based on a difference between a wireless delay and an acoustic delay. A noise suppressor produces an output audio signal for an earpiece speaker, based on the first microphone signal and the adjustable delayed second microphone signal. Other aspects are also described and claimed.