公开(公告)号：AU2014236850B2

公开(公告)日：2016-09-15

申请号：AU2014236850

申请日：2014-03-13

Applicant: APPLE INC

Inventor： JOHNSON MARTIN E ,  ISAAC RONALD N

IPC: H04S7/00

Abstract: An audio receiver that performs crosstalk cancellation using a speaker array is described. The audio receiver detects the location of a listener in a room and processes a piece of sound program content to be output through the speaker array using one or more beam pattern matrices. The beam pattern matrices are generated according to one or more constraints. The constraints may include increasing a right channel and decreasing a left channel at the right ear of the listener, increasing a left channel and decreasing a right channel at the left ear of the listener, and decreasing sound in all other areas of the room. These constraints cause the audio receiver to beam sound primarily towards the listener and not in other areas of the room such that crosstalk cancellation is achieved with minimal effects due to changes to the frequency response of the room. Other embodiments are also described.

公开(公告)号：AU2014225904A1

公开(公告)日：2015-09-24

申请号：AU2014225904

申请日：2014-03-04

Applicant: APPLE INC

Inventor： JOHNSON MARTIN E ,  ISAAC RONALD N ,  FAMILY AFROOZ

IPC: G10K11/34

Abstract: A directivity adjustment device that maintains a constant direct-to-reverberant ratio based on the detected location of a listener in relation to the speaker array is described. The directivity adjustment device may include a distance estimator, a directivity compensator, and an array processor. The distance estimator detects the distance between the speaker array and the listener. Based on this detected distance, the directivity compensator calculates a directivity index form a beam produced by the speaker array that maintains a predefined direct-to-reverberant sound energy ratio. The array processor receives the calculated directivity index and processes each channel of a piece of sound program content to produce a set of audio signals that drive one or more of the transducers in the speaker array to generate a beam pattern with the calculated directivity index.

公开(公告)号：AU2016213897B2

公开(公告)日：2018-01-25

申请号：AU2016213897

申请日：2016-08-12

Applicant: APPLE INC

Inventor： ISAAC RONALD N

IPC: H04S7/00

Abstract: ADAPTIVE ROOM EQUALIZATION USING A SPEAKER AND A HANDHELD LISTENING DEVICE A loudspeaker that measures the impulse response of a listening area is described. The loudspeaker may output sounds corresponding to a segment of an audio signal. The sounds are sensed by a listening device proximate to a listener and transmitted to the loudspeaker. The loudspeaker includes an adaptive filter that estimates the impulse response of the listening area based on the signal segment. An error unit analyzes the estimated impulse response together with the sensed audio signal received from the listening device to determine the accuracy of the estimate. New estimates may be generated by the adaptive filter until an accuracy level is achieved for the signal segment. A processor may utilize one or more estimated impulse responses corresponding to various signal segments that cover a defined frequency spectrum for adjusting the audio signal to compensate for the impulse response of the listening area. Other embodiments are also described.

公开(公告)号：AU2014225904B2

公开(公告)日：2017-03-16

申请号：AU2014225904

申请日：2014-03-04

Applicant: APPLE INC

Inventor： JOHNSON MARTIN E ,  ISAAC RONALD N ,  FAMILY AFROOZ

IPC: G10K11/34

Abstract: A directivity adjustment device that maintains a constant direct-to-reverberant ratio based on the detected location of a listener in relation to the speaker array is described. The directivity adjustment device may include a distance estimator, a directivity compensator, and an array processor. The distance estimator detects the distance between the speaker array and the listener. Based on this detected distance, the directivity compensator calculates a directivity index form a beam produced by the speaker array that maintains a predefined direct-to-reverberant sound energy ratio. The array processor receives the calculated directivity index and processes each channel of a piece of sound program content to produce a set of audio signals that drive one or more of the transducers in the speaker array to generate a beam pattern with the calculated directivity index.

公开(公告)号：AU2014236850C1

公开(公告)日：2017-02-16

申请号：AU2014236850

申请日：2014-03-13

Applicant: APPLE INC

Inventor： JOHNSON MARTIN E ,  ISAAC RONALD N

IPC: H04S7/00

Abstract: An audio receiver that performs crosstalk cancellation using a speaker array is described. The audio receiver detects the location of a listener in a room and processes a piece of sound program content to be output through the speaker array using one or more beam pattern matrices. The beam pattern matrices are generated according to one or more constraints. The constraints may include increasing a right channel and decreasing a left channel at the right ear of the listener, increasing a left channel and decreasing a right channel at the left ear of the listener, and decreasing sound in all other areas of the room. These constraints cause the audio receiver to beam sound primarily towards the listener and not in other areas of the room such that crosstalk cancellation is achieved with minimal effects due to changes to the frequency response of the room. Other embodiments are also described.

公开(公告)号：AU2016213897A1

公开(公告)日：2016-09-01

申请号：AU2016213897

申请日：2016-08-12

Applicant: APPLE INC

Inventor： ISAAC RONALD N

IPC: H04S7/00

Abstract: ADAPTIVE ROOM EQUALIZATION USING A SPEAKER AND A HANDHELD LISTENING DEVICE A loudspeaker that measures the impulse response of a listening area is described. The loudspeaker may output sounds corresponding to a segment of an audio signal. The sounds are sensed by a listening device proximate to a listener and transmitted to the loudspeaker. The loudspeaker includes an adaptive filter that estimates the impulse response of the listening area based on the signal segment. An error unit analyzes the estimated impulse response together with the sensed audio signal received from the listening device to determine the accuracy of the estimate. New estimates may be generated by the adaptive filter until an accuracy level is achieved for the signal segment. A processor may utilize one or more estimated impulse responses corresponding to various signal segments that cover a defined frequency spectrum for adjusting the audio signal to compensate for the impulse response of the listening area. Other embodiments are also described.

公开(公告)号：AU2014243797B2

公开(公告)日：2016-05-19

申请号：AU2014243797

申请日：2014-03-13

Applicant: APPLE INC

Inventor： ISAAC RONALD N

IPC: H04S7/00

Abstract: A loudspeaker that measures the impulse response of a listening area is described. The loudspeaker may output sounds corresponding to a segment of an audio signal. The sounds are sensed by a listening device proximate to a listener and transmitted to the loudspeaker. The loudspeaker includes an adaptive filter that estimates the impulse response of the listening area based on the signal segment. An error unit analyzes the estimated impulse response together with the sensed audio signal received from the listening device to determine the accuracy of the estimate. New estimates may be generated by the adaptive filter until an accuracy level is achieved for the signal segment. A processor may utilize one or more estimated impulse responses corresponding to various signal segments that cover a defined frequency spectrum for adjusting the audio signal to compensate for the impulse response of the listening area. Other embodiments are also described.

公开(公告)号：AU2014243797A1

公开(公告)日：2015-10-08

申请号：AU2014243797

申请日：2014-03-13

Applicant: APPLE INC

Inventor： ISAAC RONALD N

IPC: H04S7/00

Abstract: A loudspeaker that measures the impulse response of a listening area is described. The loudspeaker may output sounds corresponding to a segment of an audio signal. The sounds are sensed by a listening device proximate to a listener and transmitted to the loudspeaker. The loudspeaker includes an adaptive filter that estimates the impulse response of the listening area based on the signal segment. An error unit analyzes the estimated impulse response together with the sensed audio signal received from the listening device to determine the accuracy of the estimate. New estimates may be generated by the adaptive filter until an accuracy level is achieved for the signal segment. A processor may utilize one or more estimated impulse responses corresponding to various signal segments that cover a defined frequency spectrum for adjusting the audio signal to compensate for the impulse response of the listening area. Other embodiments are also described.

公开(公告)号：AU2014236850A1

公开(公告)日：2015-10-08

申请号：AU2014236850

申请日：2014-03-13

Applicant: APPLE INC

Inventor： JOHNSON MARTIN E ,  ISAAC RONALD N

IPC: H04S7/00

Abstract: An audio receiver that performs crosstalk cancellation using a speaker array is described. The audio receiver detects the location of a listener in a room and processes a piece of sound program content to be output through the speaker array using one or more beam pattern matrices. The beam pattern matrices are generated according to one or more constraints. The constraints may include increasing a right channel and decreasing a left channel at the right ear of the listener, increasing a left channel and decreasing a right channel at the left ear of the listener, and decreasing sound in all other areas of the room. These constraints cause the audio receiver to beam sound primarily towards the listener and not in other areas of the room such that crosstalk cancellation is achieved with minimal effects due to changes to the frequency response of the room. Other embodiments are also described.