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1. 发明授权

US10747492B2 Signal processing apparatus, signal processing method, and storage medium 有权
公开(公告)号：US10747492B2
公开(公告)日：2020-08-18
申请号：US16027698
申请日：2018-07-05
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： G06F3/16 , H04N9/802 , G11B27/10 , G11B27/00 , H04N5/76
摘要： A signal processing apparatus for controlling an audio signal related to playback of sound to be performed together with playback of video that is based on a video signal is provided. The apparatus obtains information indicating a speed of the video at a point in time that is included in a playback period of the video signal, and controls, in a case where the speed of the video changes from a standard speed to a speed that differs from the standard speed at a specific point in time included in the playback period of the video signal, the audio signal based on the information obtained by the obtaining unit, such that a volume parameter for controlling a playback volume of the audio signal after the specific point in time differs from the volume parameter before the specific point in time.

2. 发明授权

US09704505B2 Audio signal processing apparatus and method 有权
公开(公告)号：US09704505B2
公开(公告)日：2017-07-11
申请号：US14527682
申请日：2014-10-29
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： G10L21/00 , G10L21/0208 , G10L21/0216 , G10L21/038 , G10L15/20 , H04S7/00 , G10L21/0232
CPC分类号： G10L21/0208 , G10L15/20 , G10L21/0216 , G10L21/0232 , G10L21/038 , H04S7/40
摘要： An audio separating apparatus obtains a matrix by performing time-frequency conversion on an input audio signal. The audio separating apparatus divides the obtained matrix into at least a basis matrix and an activity matrix, and classifies base spectra that configure the respective columns of the basis matrix into first base spectra corresponding to a target sound and second base spectra corresponding to a non-target sound.

3. 发明申请

US20150208169A1 SOUND FIELD CORRECTION APPARATUS, CONTROL METHOD THEREOF, AND COMPUTER-READABLE STORAGE MEDIUM 有权
标题翻译：声场校正装置，其控制方法和计算机可读存储介质
公开(公告)号：US20150208169A1
公开(公告)日：2015-07-23
申请号：US14592954
申请日：2015-01-09
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： H04R3/04
CPC分类号： H04R3/04 , H04R5/04 , H04R2430/03
摘要： An impulse response between a sound-producing source and a listening point in an acoustic space is measured. A frequency characteristic serving as the processing target of sound field correction is derived from the impulse response. A level difference at a boundary frequency between a level representing a low frequency band and a level representing middle and high frequency bands is calculated for the low frequency band equal to or lower than the boundary frequency and the middle and high frequency bands higher than the boundary frequency in the frequency characteristic. The level of a target characteristic in the low frequency band in the frequency characteristic is decided to set the level difference after sound field correction to be equal to or smaller than a predetermined value.
摘要翻译：测量声学空间中的声音产生源和收听点之间的脉冲响应。从脉冲响应导出作为声场校正处理对象的频率特性。对于等于或低于边界频率的低频带和高于边界的中高频带，计算表示低频带的电平与表示中高频带的电平之间的边界频率处的电平差频率频率特性。决定频率特性中的低频带中的目标特性的电平，将声场校正后的电平差设定为规定值以下。

4. 发明申请

US20200314581A1 INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND STORAGE MEDIUM 审中-公开
公开(公告)号：US20200314581A1
公开(公告)日：2020-10-01
申请号：US16821419
申请日：2020-03-17
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： H04S7/00 , G06F3/16 , H04R1/40 , H04R3/00 , H04S3/00 , G10L25/24 , G10L25/06
摘要： An information processing apparatus includes a data acquisition unit to acquire pieces of acoustic data based on sound collection performed by sound collection units at different positions, a setting unit configured to set a virtual sound source position corresponding to a piece of acquired acoustic data for each acquired piece, based on a sound collection position and correlation information indicating a correlation between the piece of acoustic data and another piece of acoustic data, the virtual sound source position set so an imbalance between virtual sound source positions respectively corresponding to the pieces of acoustic data is smaller than an imbalance between sound collection positions, and a generation unit configured to generate audio playback data for reproducing a sound for a virtual listening position, by processing piece(s) of acquired acoustic data based on the virtual listening position and the virtual sound source positions set by the setting unit.

5. 发明申请

US20190238980A1 SIGNAL PROCESSING APPARATUS, SIGNAL PROCESSING METHOD, AND STORAGE MEDIUM 审中-公开
公开(公告)号：US20190238980A1
公开(公告)日：2019-08-01
申请号：US16256877
申请日：2019-01-24
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： H04R3/12 , H04R5/02 , H04R5/04 , H04S7/00
摘要： A signal processing apparatus that generates a reproducing signal from an input audio signal includes an information acquisition unit that acquires information about an arrangement of a plurality of speakers used for reproduction of a sound that is based on the reproducing signal, a specifying unit that specifies a target range for localization of a sound corresponding to the input audio signal, a setting unit that sets a plurality of virtual sound sources used for localization of a sound based on the specified target range based on the acquired information about the arrangement of the plurality of speakers, and a generation unit that generates the reproducing signal by processing the input audio signal based on setting of the plurality of virtual sound sources.

6. 发明申请

US20200169807A1 SIGNAL PROCESSING APPARATUS, METHOD OF CONTROLLING SIGNAL PROCESSING APPARATUS, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM 审中-公开
公开(公告)号：US20200169807A1
公开(公告)日：2020-05-28
申请号：US16684787
申请日：2019-11-15
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： H04R3/00 , H04R3/04 , H04R5/04 , H04R5/027
摘要： A signal processing apparatus that processes a plurality of audio signals obtained by acquiring a sound in a target area by performing sound acquisition by a plurality of sound acquisition units, comprising: a specification unit configured to specify a position of a sound source in the target area and positions and directivities of the plurality of sound acquisition units; and a selection unit configured to select, among the plurality of audio signals based on the sound acquisition by the plurality of sound acquisition units, an audio signal to be played back based on a degree of misalignment of the directivity of each of the plurality of sound acquisition units with respect to the specified position of the sound source.

7. 发明申请

US20180115852A1 SIGNAL PROCESSING APPARATUS, SIGNAL PROCESSING METHOD, AND STORAGE MEDIUM 审中-公开
公开(公告)号：US20180115852A1
公开(公告)日：2018-04-26
申请号：US15729416
申请日：2017-10-10
申请人： CANON KABUSHIKI KAISHA
发明人： Kyohei Kitazawa , Noriaki Tawada
IPC分类号： H04S7/00 , G10L19/02
摘要： A signal processing apparatus includes: an acquisition unit configured to acquire a sound collection signal based on collection of sounds in a sound collection target region by a plurality of microphones; an identification unit configured to identify a position or a region corresponding to an object in the sound collection target region; and a generation unit configured to generate a plurality of acoustic signals corresponding to a plurality of divided areas obtained by dividing the sound collection target region based on the identified position or the identified region, using the acquired sound collection signal.

8. 发明授权

US09781509B2 Signal processing apparatus and signal processing method 有权
公开(公告)号：US09781509B2
公开(公告)日：2017-10-03
申请号：US14811387
申请日：2015-07-28
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： H04R3/00
CPC分类号： H04R3/005 , H04R2410/05
摘要： A signal processing apparatus acquires an audio signal of channels using a sound acquisition unit, at least a part of which is within a housing of the apparatus, and obtains an audio signal of channels from a microphone provided outside the housing. The apparatus processes an audio signal in accordance with a first propagation characteristic indicating propagation of sound associated with a direction of a sound source, in a case of processing an audio signal acquired by the sound acquisition unit and processes an audio signal in accordance with a second propagation characteristic different from the first propagation characteristic, in a case of processing an audio signal obtained by the microphone. The signal processing apparatus estimates a sound source direction using an audio signal processed by the first processing unit or an audio signal processed by the second processing unit.

9. 发明申请

US20150139446A1 AUDIO SIGNAL PROCESSING APPARATUS AND METHOD 有权
标题翻译：音频信号处理装置和方法
公开(公告)号：US20150139446A1
公开(公告)日：2015-05-21
申请号：US14527682
申请日：2014-10-29
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： G10L21/0208
CPC分类号： G10L21/0208 , G10L15/20 , G10L21/0216 , G10L21/0232 , G10L21/038 , H04S7/40
摘要： An audio separating apparatus obtains a matrix by performing time-frequency conversion on an input audio signal. The audio separating apparatus divides the obtained matrix into at least a basis matrix and an activity matrix, and classifies base spectra that configure the respective columns of the basis matrix into first base spectra corresponding to a target sound and second base spectra corresponding to a non-target sound.
摘要翻译：音频分离装置通过对输入音频信号执行时间 - 频率转换来获得矩阵。所述音频分离装置将所获得的矩阵划分为至少基本矩阵和活动矩阵，并且将基准矩阵的各列的基本频谱分类为与对应于非矩阵的目标声音和第二基本频谱相对应的第一基本频谱，目标声音。

10. 发明申请

US20140185826A1 NOISE SUPPRESSION APPARATUS AND CONTROL METHOD THEREOF 有权
标题翻译：噪声抑制装置及其控制方法
公开(公告)号：US20140185826A1
公开(公告)日：2014-07-03
申请号：US14139527
申请日：2013-12-23
申请人： CANON KABUSHIKI KAISHA
发明人： Noriaki Tawada
IPC分类号： G10L21/0232
CPC分类号： G10L21/0232 , G10L2021/02166
摘要： A noise suppression apparatus selectively uses an adaptive beamformer and fixed beamformer for each frequency. A direction of a null of the fixed beamformer is determined from a direction of a null automatically formed by the adaptive beamformer. Filter coefficients of the adaptive beamformer based on an output power minimization rule are calculated by a minimum norm method using a norm of the filter coefficients as a constraint. The above selection is made based on, for example, a depth of a null automatically formed by the adaptive beamformer in the selection.
摘要翻译：噪声抑制装置针对每个频率选择性地使用自适应波束形成器和固定波束形成器。从自适应波束形成器自动形成的零点的方向确定固定波束形成器的零点的方向。基于输出功率最小化规则的自适应波束形成器的滤波器系数通过使用滤波器系数的范数作为约束的最小范数法来计算。上述选择基于例如在选择中由自适应波束形成器自动形成的空值的深度来进行。

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