Abstract: An information processing method includes: obtaining an audio signal generated by collecting sound emitted from a sound source using a sound collection device; executing, on the audio signal, acoustic processing that repeatedly changes a relative position between the sound collection device and the sound source in a time domain; and outputting an output audio signal on which the acoustic processing has been executed.

Abstract: An acoustic signal processing method includes: obtaining first position information indicating a position of an object that is a moving object in a virtual space, and second position information indicating a position of a listener in the virtual space; calculating a moving speed of the object based on the first position information obtained; calculating a distance between the object and the listener based on the first position information obtained and the second position information obtained; generating, based on the moving speed calculated and the distance calculated, an aerodynamic sound signal indicating an aerodynamic sound generated when wind caused by movement of the object reaches an ear of the listener; and outputting the aerodynamic sound signal generated.

Abstract: An information generation method includes: obtaining a second wind direction of a second wind blowing in a virtual space and a second assumed wind speed which is a speed of the second wind; generating fifth object audio information in which the obtained second wind direction and second assumed wind speed are associated; storing aerodynamic sound core information including a representative wind speed and aerodynamic sound data indicating aerodynamic sound generated by wind blowing at the representative wind speed reaching an ear of a listener in the virtual space; and outputting the generated fifth object audio information and the stored aerodynamic sound core information.

Abstract: An acoustic signal processing method includes: obtaining: object information including first position information indicating a position of an object in a virtual space, first sound data indicating a first sound caused by the object, and first identification information indicating a processing method for the first sound data; and second position information indicating a position of a listener; calculating a distance between the object and the listener based on the first position information included in the object information obtained and the second position information obtained; determining, based on the first identification information included in the object information obtained, to process the first sound data using a first processing method for processing a loudness according to the distance calculated or a second processing method for processing the same in a different manner; processing the first sound data using the processing method determined; and outputting the first sound data processed.

Abstract: An information generation method includes: obtaining first sound data and first position information, the first sound data indicating a first sound, the first position information indicating a position of an object in the virtual space; and generating, from the obtained first sound data and first position information, first object audio information including (i) information related to the object that reproduces the first sound generated at a position of a listener due to the object, and (ii) the first position information.

Abstract: An information generation method including: obtaining a generation position of a first wind blowing in a virtual space, a first wind direction of the first wind, and a first assumed wind speed which is a speed of the first wind; generating fourth object audio information in which the obtained generation position, first wind direction, and first assumed wind speed are associated; storing aerodynamic sound core information including a representative wind speed and aerodynamic sound data indicating aerodynamic sound generated by wind blowing at the representative wind speed reaching an ear of a listener in the virtual space; and outputting the generated fourth object audio information and the stored aerodynamic sound core information.

Abstract: An acoustic reproduction method includes: acquiring a first audio signal corresponding to an ambient sound that arrives at a listener from a first range in a sound reproduction space and a second audio signal corresponding to a target sound that arrives at the listener from a point in the sound reproduction space; acquiring direction information about the listener; performing, when a back range of the listener is determined to include the first range and the point based on the direction information, correction processing such that the first range does not overlap the point when the sound reproduction space is viewed in a predetermined direction; and mixing at least one of the first audio signal or the second audio signal and outputting the at least one thereof to an output channel.

Abstract: A three-dimensional audio processing method for use in reproducing three-dimensional audio using an augmented reality (AR) device includes: obtaining change information indicating change occurring in a space in which the AR device is located when content that includes a sound is being output in the AR device; selecting, based on the change information, one or more audio processes among a plurality of audio processes for rendering sound information indicating the sound; executing only the one or more audio processes selected among the plurality of audio processes; and rendering the sound information based on a first processing result of each of the one or more audio processes executed.

Abstract: An information processing method includes: obtaining a position of a user within the three-dimensional sound field; determining a virtual boundary that includes two or more lattice points surrounding the user, based on the position of the user which has been obtained, the two or more lattice points being among a plurality of lattice points set at predetermined intervals within the three-dimensional sound reading field; the propagation characteristics of the sound from the sound source to the two or more lattice points included in the virtual boundary determined; calculating transfer functions of the sound from the two or more lattice points included in the virtual boundary determined to the position of the user; and generating the output sound signal by processing the sound information using the propagation characteristics read and the transfer functions calculated.

Abstract: An acoustic processing method includes: obtaining (i) sound information related to a sound including a predetermined sound and (ii) metadata including information related to a space in which the predetermined sound is reproduced; performing, based on the sound information and the metadata, acoustic processing of generating a sound signal expressing a sound including an early reflection that reaches a user after a direct sound that reaches the user directly from a sound source object; and outputting an output sound signal including the sound signal. The acoustic processing includes: determining parameters for generating the early reflection, the parameters including a position, in the space, of a virtual sound source object that generates the early reflection; and generating the early reflection based on the parameters determined. The parameters include at least a parameter that varies over time according to a predetermined condition.

Abstract: A sound signal processing method includes: obtaining a sound signal; determining, for each of a plurality of sound processes executed in a pipeline, whether to execute the sound process on the sound signal, based on priority information indicating a priority associated with the sound signal; and executing each sound process determined to be executed in the determining, on the sound signal.

Abstract: In an acoustic processing method, (i) sound information related to a sound including a predetermined sound and (ii) metadata including information related to a space in which the predetermined sound is reproduced are obtained; based on the sound information and the metadata, sound image localization enhancement processing of generating a first sound signal expressing a sound including a sound image localization enhancement reflected sound for localization as a sound arriving from a predetermined direction is performed; based on the sound information and the metadata, acoustic processing of generating a second sound signal expressing a sound including a sound other than a direct sound that reaches a user directly from a sound source object is performed; and an output sound signal obtained by compositing the first sound signal and the second sound signal is output.

Abstract: An acoustic reproduction method includes: obtaining a sound signal indicating a sound that reaches a listener in a sound reproduction space and processing information indicating whether to perform, on the sound signal, reduction processing for reducing noise included in the sound; determining processing content of the reduction processing when the processing information obtained indicates that the reduction processing is to be performed; performing the reduction processing, based on the processing content determined; and outputting the sound signal on which the reduction processing has been performed.

Abstract: An acoustic signal processing device includes: an obtainer that obtains location information indicating a location of an object in a virtual space, and first shape information indicating a shape of the object and used for generating a video of the object in the virtual space; a detector that detects a moving speed of the object in the virtual space, based on the location information obtained; a generator that generates a first acoustic signal indicating an aerodynamic sound generated by the object, based on the moving speed detected and the first shape information obtained; and an outputter that outputs the first acoustic signal generated.

Abstract: Each of one or more audio objects includes: sound data of a sound emitted from an object that corresponds to the audio object; and metadata that includes position information indicating a position of the object in a virtual sound space. A sound signal processing device includes: a selector that selects an audio object as a conversion target from among the one or more audio objects; and an fluctuation imparter that converts the audio object selected as the conversion target to impart, to the audio object selected, a fluctuation effect of fluctuating a sound emitted from an object that corresponds to the audio object converted when the sound signal is reproduced. The selector does not select an audio object that corresponds to an object whose position is moving in the virtual sound space based on a transition over time of the position information included in the metadata.

Abstract: A sound reproduction method includes: obtaining a second audio signal indicating a second sound which arrives at a listener from a second range and a first audio signal indicating a first sound which arrives at the listener from a predetermined direction; when the second range and the predetermined direction are determined to be included in a first range which is a back range relative to a front range in the direction that the head part of the listener faces, performing a correction process on at least one of the second audio signal or the first audio signal so that intensity of the first audio signal becomes higher than intensity of the second audio signal; and performing mixing of the at least one of the second audio signal or the first audio signal, and outputting, to an output channel, the first and first audio signals.

Abstract: A sound reproduction method includes: obtaining a first audio signal indicating a first sound which arrives at a listener from a first range and a second audio signal indicating a second sound which arrives at the listener from a predetermined direction; when the first range and the predetermined direction are determined to be included in a second range which is a back range relative to a front range in the direction that the head part of the listener faces, performing a correction process on at least one of the first audio signal or the second audio signal so that intensity of the second audio signal becomes higher than intensity of the first audio signal; and performing mixing of the at least one of the first audio signal or the second audio signal, and outputting, to an output channel, the first and second audio signals.

Abstract: A sound reproduction method includes: obtaining spatial information for reproducing a virtual space which includes a structure and a sound source; identifying a listening position in the virtual space; generating one or more virtual sound sources for reproducing diffraction of sound emitted from the sound source, the one or more virtual sound sources being disposed in a neighborhood of one or more virtual sound source directions; and determining the one or more virtual sound sources based on a length of a propagation path of the sound from the sound source to a listener, the propagation path bypassing the structure. The determining includes determining at least one of (i) a sound pressure level of sound from the one or more virtual sound source directions, (ii) a total number of the one or more virtual sound sources, or (iii) a frequency characteristic of sound from the one or more virtual sound sources.

Abstract: An acoustic reproduction method includes: acquiring a first audio signal corresponding to an ambient sound that arrives at a listener from a first range in a sound reproduction space and a second audio signal corresponding to a target sound that arrives at the listener from a point in the sound reproduction space; acquiring direction information about the listener; performing, when a back range of the listener is determined to include the first range and the point based on the direction information, correction processing such that the first range does not overlap the point when the sound reproduction space is viewed in a predetermined direction; and mixing at least one of the first audio signal or the second audio signal and outputting the at least one thereof to an output channel.

Abstract: A sound reproduction method includes: obtaining a first audio signal indicating a first sound which arrives at a listener from a first range and a second audio signal indicating a second sound which arrives at the listener from a predetermined direction; when the first range and the predetermined direction are determined to be included in a second range which is a back range relative to a front range in the direction that the head part of the listener faces, performing a correction process on at least one of the first audio signal or the second audio signal so that intensity of the second audio signal becomes higher than intensity of the first audio signal; and performing mixing of the at least one of the first audio signal or the second audio signal, and outputting, to an output channel, the first and second audio signals.