公开(公告)号：JP2012105287A

公开(公告)日：2012-05-31

申请号：JP2011262917

申请日：2011-11-11

Applicant: Apple Inc ,  アップル インコーポレイテッド

Inventor： CHEN SHAOHAI ,  NICHOLSON GUY C ,  BRUCE C POE

IPC: H04M1/00

CPC classification number: G10L21/0364 ,  G10L21/02 ,  H04M1/60

Abstract: PROBLEM TO BE SOLVED: To improve a user's experience of downlink audio in a communications device.SOLUTION: A communications device is configured to control the intelligibility of speech in a downlink voice signal during a call. The device determines a current noise level based on sampling ambient acoustic noise and based on a previously determined noise level. The device then determines an overall output gain and a frequency response based on the current noise level and based on a user-selected volume setting of the device. The device modifies the downlink voice signal during the call in accordance with the determined overall output gain and the determined frequency response. Other embodiments are also described and claimed.

Abstract translation: 要解决的问题：提高用户在通信设备中下行链路音频的体验。 解决方案：通信设备被配置为在呼叫期间控制下行链路语音信号中的语音的可懂度。 该装置基于取样环境声学噪声并基于先前确定的噪声电平来确定当前的噪声电平。 然后，设备基于当前噪声水平并且基于用户选择的设备的音量设置来确定总体输出增益和频率响应。 该设备根据所确定的总体输出增益和所确定的频率响应在呼叫期间修改下行链路语音信号。 还描述和要求保护其他实施例。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：CA2796397C

公开(公告)日：2016-02-02

申请号：CA2796397

申请日：2011-05-31

Applicant: APPLE INC

Inventor： NICHOLSON GUY C

IPC: G10K11/178

Abstract: Active noise cancellation (ANC) circuitry is coupled to the input of an earpiece speaker in a portable audio device, to control the ambient acoustic noise outside of the device and that may be heard by a user of the device. A microphone is to pickup sound emitted from the earpiece speaker, as well as the ambient acoustic noise. Control circuitry deactivates the ANC in response to determining that an estimate of how much sound emitted from the earpiece speaker has been corrupted by noise indicates insufficient corruption by noise. In another embodiment, the ANC decision is in response to determining that an estimate of the ambient noise level is greater than a threshold level of an audio artifact that could be induced by the ANC. Other embodiments are also described and claimed.

公开(公告)号：HK1183964A1

公开(公告)日：2014-01-10

申请号：HK13111251

申请日：2013-10-03

Applicant: APPLE INC

Inventor： NICHOLSON GUY C

IPC: G10K20060101

Abstract: Active noise cancellation (ANC) circuitry is coupled to the input of an earpiece speaker in a portable audio device, to control the ambient acoustic noise outside of the device and that may be heard by a user of the device. A microphone is to pickup sound emitted from the earpiece speaker, as well as the ambient acoustic noise. Control circuitry deactivates the ANC in response to determining that an estimate of how much sound emitted from the earpiece speaker has been corrupted by noise indicates insufficient corruption by noise. In another embodiment, the ANC decision is in response to determining that an estimate of the ambient noise level is greater than a threshold level of an audio artifact that could be induced by the ANC. Other embodiments are also described and claimed.

公开(公告)号：AU2013239736A1

公开(公告)日：2014-09-11

申请号：AU2013239736

申请日：2013-03-27

Applicant: APPLE INC

Inventor： NICHOLSON GUY C ,  JENSEN THOMAS M

IPC: G10K11/178

Abstract: A feed forward active noise cancellation (ANC) system for use in a portable audio device has an adaptive digital filter and a reference microphone. A non-adaptive pre-shaping digital filter has an input coupled to the reference microphone and is in series with, and in front of, the adaptive filter. The pre-shaping filter is minimum phase and presents at least 2 dB more gain over a low audio frequency band than over a high audio frequency band. This may help compensate for low frequency band difficulties, and may thereby extend ANC bandwidth at the low end without a worsening impact on the high end. Other embodiments are also described and claimed.

公开(公告)号：CA2796397A1

公开(公告)日：2011-12-08

申请号：CA2796397

申请日：2011-05-31

Applicant: APPLE INC

Inventor： NICHOLSON GUY C

IPC: G10K11/178

Abstract: Active noise cancellation (ANC) circuitry is coupled to the input of an earpiece speaker in a portable audio device, to control the ambient acoustic noise outside of the device and that may be heard by a user of the device. A microphone is to pickup sound emitted from the earpiece speaker, as well as the ambient acoustic noise. Control circuitry deactivates the ANC in response to determining that an estimate of how much sound emitted from the earpiece speaker has been corrupted by noise indicates insufficient corruption by noise. In another embodiment, the ANC decision is in response to determining that an estimate of the ambient noise level is greater than a threshold level of an audio artifact that could be induced by the ANC. Other embodiments are also described and claimed.

公开(公告)号：AU2013239736B2

公开(公告)日：2015-12-10

申请号：AU2013239736

申请日：2013-03-27

Applicant: APPLE INC

Inventor： NICHOLSON GUY C ,  JENSEN THOMAS M

IPC: G10K11/178

Abstract: A feed forward active noise cancellation (ANC) system for use in a portable audio device has an adaptive digital filter and a reference microphone. A non-adaptive pre-shaping digital filter has an input coupled to the reference microphone and is in series with, and in front of, the adaptive filter. The pre-shaping filter is minimum phase and presents at least 2 dB more gain over a low audio frequency band than over a high audio frequency band. This may help compensate for low frequency band difficulties, and may thereby extend ANC bandwidth at the low end without a worsening impact on the high end. Other embodiments are also described and claimed.

公开(公告)号：NL2007764C2

公开(公告)日：2012-07-31

申请号：NL2007764

申请日：2011-11-10

Applicant: APPLE INC

Inventor： CHEN SHAOHAI ,  NICHOLSON GUY C ,  PO BRUCE C

IPC: G10L21/02 ,  H04M1/60

Abstract: A communications device is configured to control the intelligibility of speech in a downlink voice signal during a call. The device determines a current noise level based on sampling ambient acoustic noise and based on a previously determined noise level. The device then determines an overall output gain and a frequency response based on the current noise level and based on a user-selected volume setting of the device. The device modifies the downlink voice signal during the call in accordance with the determined overall output gain and the determined frequency response. Other embodiments are also described and claimed.

公开(公告)号：NL2007764C

公开(公告)日：2012-07-31

申请号：NL2007764

申请日：2011-11-10

Applicant: APPLE INC

Inventor： CHEN SHAOHAI ,  NICHOLSON GUY C ,  PO BRUCE C

IPC: G10L21/02 ,  H04M1/60

CPC classification number: G10L21/0364 ,  G10L21/02 ,  H04M1/60

公开(公告)号：NL2007764A

公开(公告)日：2012-05-15

申请号：NL2007764

申请日：2011-11-10

Applicant: APPLE INC

Inventor： CHEN SHAOHAI ,  NICHOLSON GUY C ,  PO BRUCE C

IPC: G10L21/02 ,  H04M1/60

Abstract: A communications device is configured to control the intelligibility of speech in a downlink voice signal during a call. The device determines a current noise level based on sampling ambient acoustic noise and based on a previously determined noise level. The device then determines an overall output gain and a frequency response based on the current noise level and based on a user-selected volume setting of the device. The device modifies the downlink voice signal during the call in accordance with the determined overall output gain and the determined frequency response. Other embodiments are also described and claimed.

公开(公告)号：AU2011261559B2

公开(公告)日：2013-11-14

申请号：AU2011261559

申请日：2011-05-31

Applicant: APPLE INC

Inventor： NICHOLSON GUY C

IPC: G10K11/178

Abstract: Active noise cancellation (ANC) circuitry is coupled to the input of an earpiece speaker in a portable audio device, to control the ambient acoustic noise outside of the device and that may be heard by a user of the device. A microphone is to pickup sound emitted from the earpiece speaker, as well as the ambient acoustic noise. Control circuitry deactivates the ANC in response to determining that an estimate of how much sound emitted from the earpiece speaker has been corrupted by noise indicates insufficient corruption by noise. In another embodiment, the ANC decision is in response to determining that an estimate of the ambient noise level is greater than a threshold level of an audio artifact that could be induced by the ANC. Other embodiments are also described and claimed.