Abstract: Provided is a signal processing device including: a reverberation sound signal generation unit that generates a reverberation sound signal according to a sound source position of a virtual sound source and a distance to a reference point; and a drive signal generation unit that generates a drive signal for a speaker array by a wavefront synthesis filter, in which the drive signal generation unit generates the drive signal on the basis of a signal obtained by performing wavefront synthesis filtering processing on a signal obtained by convolving the reverberation sound signal with a signal of the virtual sound source and/or a signal obtained by performing wavefront synthesis filtering processing on the reverberation sound signal to make the reverberation sound signal into a virtual sound source.

Abstract: Provided is a signal processing apparatus having: a sound source separation unit configured to perform sound source separation on a mixed sound signal obtained by mixing a plurality of sound source signals; a sound source type determination unit configured to determine a type of a predetermined sound source signal obtained by the sound source separation; and an output destination control unit configured to output the predetermined sound source signal to a corresponding output device on the basis of a determination result of the sound source type determination unit.

Abstract: To provide a mechanism for selectively taking an external sound from an appropriate sound source into an internal space of a moving object. An information processing apparatus including an acquisition unit configured to acquire an audio signal from a sound source existing outside a moving object, a generation unit configured to generate an audio signal from a target sound source at a distance from the moving object, the distance being a distance according to a speed of the moving object, of the sound sources, on the basis of the audio signal acquired by the acquisition unit, and an output control unit configured to output the audio signal generated by the generation unit toward an internal space of the moving object.

Abstract: The present technology relates to a signal processing apparatus and method, and a program that can easily make a leaking sound difficult to hear. A signal processing apparatus includes a masking sound generation unit that, in a case where a first content is reproduced in a first region and a second content is reproduced in a second region by wave field synthesis using a speaker array, generates a masking sound for masking a sound of the first content and a sound of the second content heard in a region between the first region and the second region. The present technology can be applied to content reproduction systems.

Abstract: The present technology relates to an information processing apparatus and method, and a program, which are capable of conducting a search more easily and at a higher speed. the information processing apparatus includes a control unit configured to designate a designated section and a designated sound source of an audio signal including sounds of a plurality of sound sources, and configured to obtain a search result of a sound source signal similar to a signal of the designated sound source, the sound source signal having been searched for on the basis of the signal of the designated sound source in the designated section of the audio signal. The present technology is applicable to the information processing apparatus.

Abstract: The present invention reduces the work cost. An information processing device includes an input-signal acquisition section that acquires an input signal, a calculation section that calculates a feature included in the input signal, and a display control section that converts the feature included in the input signal into a visual feature and causes the visual feature to be displayed. The present technology is applicable to an information processing device.

Abstract: The present technology relates to an information processing device, an information processing method, and a program that enable easier visualization of a sound field. The information processing device includes: a calculation unit configured to calculate, on the basis of positional information indicating a plurality of observation positions in a space and an audio signal of sound observed at each of the plurality of observation positions, an amplitude or phase of the sound at each of a plurality of positions in the space at a first time interval; an event detection unit configured to detect an event; and an adjustment unit configured to perform, in a case where the event is detected, control such that the amplitude or the phase is calculated at a second time interval shorter than the first time interval. The present technology can be applied to a sound-field visualization system.

Abstract: To provide a mechanism for selectively taking an external sound from an appropriate sound source into an internal space of a moving object. An information processing apparatus including an acquisition unit configured to acquire an audio signal from a sound source existing outside a moving object, a generation unit configured to generate an audio signal from a target sound source at a distance from the moving object, the distance being a distance according to a speed of the moving object, of the sound sources, on the basis of the audio signal acquired by the acquisition unit, and an output control unit configured to output the audio signal generated by the generation unit toward an internal space of the moving object.

Abstract: An information processing apparatus, an information processing system, an information processing method, and a program according to the present disclosure each include a sound-source position determining section (131) and an output control section (133). The sound-source position determining section (131) determines a position of a virtual sound source that is generated by a speaker array (20) and produces a spherical wave. The output control section (133) controls an output from the speaker array (20) to cause the virtual sound source to be located at the position. The virtual sound source outputs voice information corresponding to visual information that is information shown on a display (30).

Abstract: The present technology relates to a signal processing apparatus and method, and a program that can easily make a leaking sound difficult to hear. A signal processing apparatus includes a masking sound generation unit that, in a case where a first content is reproduced in a first region and a second content is reproduced in a second region by wave field synthesis using a speaker array, generates a masking sound for masking a sound of the first content and a sound of the second content heard in a region between the first region and the second region. The present technology can be applied to content reproduction systems.

Abstract: [Object] To provide a sound source separation technology capable of improving the separation performance. [Solution] An information processing apparatus including: an acquisition section configured to acquire an observation signal obtained by observing a sound; and a sound source separation section configured to separate the observation signal acquired by the acquisition section into a plurality of separated signals corresponding to a plurality of assumed sound sources by applying a non-linear function to a matrix product of an input vector and a coefficient vector corresponding to each of the plurality of sound sources.

Abstract: The present technology relates to a microphone array, a recording apparatus, a recording method, and a program that make it possible to perform broadband sound field recording at low cost. A microphone array is a microphone array used for sound field recording that includes a plurality of sub-arrays. Further, the sub-array includes a plurality of microphones, and has a discretely rotationally symmetric shape having a specified radius, in which when values of the radiuses of the plurality of sub-arrays form a progression, the progression is a generalized arithmetic progression. The present technology is applicable to, for example, a microphone array and a recording apparatus.

Abstract: The present technology relates to an audio processing apparatus, an audio processing method, and a program which enable to appropriately eliminate a noise. An audio processing apparatus includes a sound collector which collects audio, an audio enhancer which enhances audio to be extracted using an audio signal collected by the sound collector, an audio attenuator which attenuates the audio to be extracted using the audio signal collected by the sound collector, a noise environment estimator which estimates a surrounding noise environment, and a post-filtering unit which performs post-filtering processing using an audio-enhanced signal from the audio enhancer and an audio-attenuated signal from the audio attenuator, in which the post-filtering unit sets strength of processing for noise elimination according to the noise environment by the noise environment estimator. The present technology can be applied to an apparatus which performs audio recognition processing, such as a mobile phone.

Abstract: [Object] To provide a signal processing device, a signal processing method, and a program. [Solution] The signal processing device includes: a first arithmetic processing unit that performs first suppressing processing for suppressing a first audio signal based on a first microphone on a basis of a second audio signal based on a second microphone; and a second arithmetic processing unit that performs second suppressing processing for suppressing the second audio signal on a basis of the first audio signal.

Abstract: [Object] To provide a sound source separation technology capable of improving the separation performance. [Solution] An information processing apparatus including: an acquisition section configured to acquire an observation signal obtained by observing a sound; and a sound source separation section configured to separate the observation signal acquired by the acquisition section into a plurality of separated signals corresponding to a plurality of assumed sound sources by applying a non-linear function to a matrix product of an input vector and a coefficient vector corresponding to each of the plurality of sound sources.

Abstract: The present disclosure relates to a noise reduction device and a noise reduction method capable of reducing noise in a more stable and effective manner. Signal processing is performed to generate a reference signal representing a waveform of noise. Moreover, signal processing is performed for an error signal representing a waveform of an error measured by a microphone in accordance with an amplitude-frequency characteristic. Then, a filter coefficient with which the error signal becomes zero is calculated under adaptive algorithm with reference to the reference signal. The reference signal is filtered by using the filter coefficient to obtain a control signal. The control signal is supplied to the corresponding one of the predetermined number of output units. The present technology is applicable to a noise cancelling system equipped in a closed space such as an interior of a vehicle, for example.

Abstract: [Object] To provide a signal processing device, a signal processing method, and a program. [Solution] The signal processing device includes: a first arithmetic processing unit that performs first suppressing processing for suppressing a first audio signal based on a first microphone on a basis of a second audio signal based on a second microphone; and a second arithmetic processing unit that performs second suppressing processing for suppressing the second audio signal on a basis of the first audio signal.

Abstract: The present disclosure relates to a noise reduction device, a noise reduction method, and a program capable of reducing noise in a more stable and effective manner. Signal processing is performed to generate a reference signal representing a waveform of noise on the basis of an estimation value indicating estimation of an acoustic characteristic in a route from each of a predetermined number of speakers to a microphone. Moreover, signal processing is performed for an error signal representing a waveform of an error measured by the microphone in accordance with an amplitude-frequency characteristic obtained from the corresponding one of the acoustic characteristics. Then, a filter coefficient with which the error signal becomes zero is calculated under adaptive algorithm with reference to the reference signal. The reference signal is filtered by using the filter coefficient to obtain a control signal. The control signal is supplied to the corresponding one of the predetermined number of output units.

Abstract: The present technology relates to a sound processing device, a sound processing method, and a program, which can collect a desired sound. A sound processing device includes: a sound collection unit configured to collect a sound; an application unit configured to apply a predetermined filter to a signal of the sound collected by the sound collection unit; a selection unit configured to select a filter coefficient of the filter applied by the application unit; and a correction unit configured to correct the signal from the application unit. The selection unit selects the filter coefficient on the basis of the signal of the sound collected by the sound collection unit. The selection unit creates, on the basis of the signal of the sound collected by the sound collection unit, a histogram which associates a direction where the sound occurs and a strength of the sound and selects the filter coefficient on the basis of the histogram. The present technology can be applied to a sound processing device.

Abstract: The present technology relates to a sound processing device, a sound processing method, and a program, which can collect a desired sound. A sound processing device includes: a sound collection unit configured to collect a sound; an application unit configured to apply a predetermined filter to a signal of the sound collected by the sound collection unit; a selection unit configured to select a filter coefficient of the filter applied by the application unit; and a correction unit configured to correct the signal from the application unit. The selection unit selects the filter coefficient on the basis of the signal of the sound collected by the sound collection unit. The selection unit creates, on the basis of the signal of the sound collected by the sound collection unit, a histogram which associates a direction where the sound occurs and a strength of the sound and selects the filter coefficient on the basis of the histogram. The present technology can be applied to a sound processing device.