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公开(公告)号：EP4325889A1
公开(公告)日：2024-02-21
申请号：EP23189054.2
申请日：2023-08-01
IPC分类号： H04R3/00
摘要： In an audio system, when overheating of a speaker is detected, a controller controls first and second selectors to input an audio signal output by an audio source device to a cooling processing section and cause output of the cooling processing section to be output to the speaker. In the cooling processing section, a mixer mixes an audio signal obtained by removing a low-frequency component from the input audio signal by a high-pass filter with a cooling signal at an infrasonic frequency generated by a cooling signal generator and adjusted with a gain by a gain adjuster. An audio signal obtained by mixing the audio signal with the cooling signal is output from the cooling processing section via a nonlinear inverse filter. A gain setting section sets the gain such that power of the cooling signal matches power of the low-frequency component extracted by a low-pass filter.
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公开(公告)号：EP4236363A2
公开(公告)日：2023-08-30
申请号：EP23155066.6
申请日：2023-02-06
发明人： Saito, Yuji , Egami, Katsuhiko , Taguchi, Hiroyuki
摘要： A speaker has a magnetic angle sensor that detects the displacement of the vibration system of the speaker. A non-linearity compensation filter compensates for output distortion due to a non-linear parameter of the speaker. A transfer function of a linear inverse filter is applied so that output distortion is eliminated from the displacement, detected by the magnetic angle sensor, of the vibration system. A controller drives the speaker by using a test signal, and measures a response from the detected displacement of the vibration system. If error between the measured response and the theoretical value, theoretically determined from the design specifications, of the response is small, the controller uses the theoretical value, theoretically determined from the design specifications, of the non-linear parameter as an active non-linear parameter and sets, in the non-linearity compensation filter, a transfer function that compensates for distortion in an output due to the active non-linear parameter.
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公开(公告)号：EP4120693A1
公开(公告)日：2023-01-18
申请号：EP22183593.7
申请日：2022-07-07
摘要： Provided are a "speaker distortion correction device and a speaker unit" that restrict unusual operations while appropriately correcting distortion.
An input signal (Si) passes through a nonlinear-portion correction filter (41), and is input into a linear inverse filter (42). An output signal (So) from the linear inverse filter (42) is output into a speaker (2) through an amplifier (5). For the nonlinear-portion correction filter (41), set are transfer characteristics (filter coefficients) that eliminate distortion due to nonlinear characteristics of the speaker (2). With a difference, as an error, between vibration of the speaker (2) without distortion relative to an input signal (Si) and vibration of a vibration system of the speaker (2) measured by a vibration measurement unit (3), an adaptive-algorithm execution unit (43) performs an adaptive operation that adaptively updates filter coefficients of the linear inverse filter (42). When the amplitude of vibration of the vibration system of the speaker (2) measured by the vibration measurement unit (3) deviates from a range normal relative to an input voltage input into the speaker (2), a control unit (1) stops the adaptive operation of the adaptive-algorithm execution unit (43)-
公开(公告)号：EP4236363A3
公开(公告)日：2023-11-01
申请号：EP23155066.6
申请日：2023-02-06
发明人： Saito, Yuji , Egami, Katsuhiko , Taguchi, Hiroyuki
摘要： A speaker has a magnetic angle sensor that detects the displacement of the vibration system of the speaker. A non-linearity compensation filter compensates for output distortion due to a non-linear parameter of the speaker. A transfer function of a linear inverse filter is applied so that output distortion is eliminated from the displacement, detected by the magnetic angle sensor, of the vibration system. A controller drives the speaker by using a test signal, and measures a response from the detected displacement of the vibration system. If error between the measured response and the theoretical value, theoretically determined from the design specifications, of the response is small, the controller uses the theoretical value, theoretically determined from the design specifications, of the non-linear parameter as an active non-linear parameter and sets, in the non-linearity compensation filter, a transfer function that compensates for distortion in an output due to the active non-linear parameter.
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公开(公告)号：EP4120260A1
公开(公告)日：2023-01-18
申请号：EP22183438.5
申请日：2022-07-06
发明人： Tachi, Ryosuke , Taguchi, Hiroyuki
IPC分类号： G10L21/02 , H04R3/00 , G10L21/0216 , B60R11/02
摘要： Provided is an "in-vehicle communication support system" that improves an SN ratio of a speech voice output from a speaker with a relatively efficient configuration.
A right seat processing unit (11) includes, assuming that a voice of a user in a right front seat is a right front seat voice, a filter HR (111) that converts the right front seat voice being output from a left front seat microphone (PL) disposed on a headrest of a left front seat into the right front seat voice collected by a right seat virtual microphone (PVR) that is a virtual microphone located on a left side of a headrest of the right front seat, a delay unit Z -TR (112) that delays and outputs an output from a right front seat microphone (PR) located on a right side of the headrest of the right front seat, a filter WRA (113) that extracts the right front seat voice being output from the filter HR (111), a filter WRB (114) that extracts the right front seat voice being output from the delay unit Z -TR (112), and a right adder (115) that adds outputs of the filter WRA (113) and the filter WRB (114) and outputs an added output as a right front seat speech voice signal (SR).
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