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.

Abstract: The signal processing device is a signal processing device that collects a target sound output from an object to be a sound source, and includes a communication circuit that inputs image data produced by a camera and an acoustic signal output from a microphone array, and a control circuit that controls a sound collection direction of the acoustic signal in at least any one of a horizontal direction and a vertical direction relative to the microphone array based on at least any one of the image data and the acoustic signal.

Abstract: The signal processing device is a signal processing device that collects a target sound output from an object to be a sound source, and includes a communication circuit that inputs image data produced by a camera and an acoustic signal output from a microphone array, and a control circuit that controls a sound collection direction of the acoustic signal in at least any one of a horizontal direction and a vertical direction relative to the microphone array based on at least any one of the image data and the acoustic signal.

Abstract: A method for presenting a sound, a non-transitory recording medium, a sound presentation system, and a terminal apparatus capable of improving the comfort of a user are provided. A communication unit obtains an announcement sound announced from an utterer to a user in an airplane and a degree of importance of the announcement sound. Next, an in-flight broadcasting priority control unit determines, on the basis of the obtained degree of importance, whether to present the announcement sound to the user. If the in-flight broadcasting priority control unit determines that the announcement sound is to be presented to the user, an in-flight broadcasting control unit transmits the announcement sound to an entertainment terminal used by the user.

Abstract: A method for presenting a sound, a non-transitory recording medium, a sound presentation system, and a terminal apparatus capable of improving the comfort of a user are provided. A communication unit obtains an announcement sound announced from an utterer to a user in an airplane and a degree of importance of the announcement sound. Next, an in-flight broadcasting priority control unit determines, on the basis of the obtained degree of importance, whether to present the announcement sound to the user. If the in-flight broadcasting priority control unit determines that the announcement sound is to be presented to the user, an in-flight broadcasting control unit transmits the announcement sound to an entertainment terminal used by the user.

Abstract: There are included an input unit for inputting an input sentence, and an output unit for outputting an output sentence obtained by translating the input sentence into a translation language. The translation language is set based on located language information and position information of a translation device. The located language information includes a predetermined location of each of a plurality of speakers and a used language of each of the plurality of speakers. Accordingly, the translation language, which is a translation target, may be set from a plurality of languages while reducing the operation burden on a user.

Abstract: There are included an input unit for inputting an input sentence, and an output unit for outputting an output sentence obtained by translating the input sentence into a translation language. The translation language is set based on located language information and position information of a translation device. The located language information includes a predetermined location of each of a plurality of speakers and a used language of each of the plurality of speakers. Accordingly, the translation language, which is a translation target, may be set from a plurality of languages while reducing the operation burden on a user.

Abstract: A sound reproduction apparatus includes a sound source localization estimating unit that performs estimates using input audio signals in an acoustic space when the input audio signals are reproduced by speakers placed in standard positions; and a sound source signal separating unit that calculates a sound source localization signal and separates, from the input audio signals, sound source non-localization signals. Additionally, a sound source position parameter calculating unit calculates parameters indicating a position of the sound source localization signal in the acoustic space; and a reproduction signal generating unit uses the sound source position parameters to distribute the sound source localization signal to front speakers placed in the standard positions in front and headphones placed near the ears of a listener and in positions different from the standard positions, by combining the sound source localization signal and the sound source non-localization signals.

Abstract: An audio reproduction apparatus is provided which is capable of maintaining the sense of dimensions in an acoustic space even when multi-channel input audio signals are reproduced using speakers having different frequency characteristics.

Abstract: An audio signal reproduction device includes: a signal obtainment unit which obtains channel signals including a channel signal representing a direct sound; a reflected sound signal generation unit which, when a first area includes a sound image of the direct sound and a second area is an area other than the first area, generate a reflected sound signal representing a reflected sound, the reflected sound being a sound which reaches the listener after the direct sound is reflected at a predetermined position in the second area; a signal generation unit which generates, from the reflected sound signal, a signal to be outputted to a corresponding channel so that the listener perceives that the reflected sound comes from the predetermined position, the at least one of the channels corresponding to the at least one of the speakers.

Abstract: An audio reproduction apparatus is provided which is capable of maintaining the sense of dimensions in an acoustic space even when multi-channel input audio signals are reproduced using speakers having different frequency characteristics.

Abstract: A sound reproduction apparatus includes: a sound source localization estimating unit (1) that estimates whether or not a sound image is localized using input audio signals in an acoustic space when the input audio signals are reproduced by speakers (FL, FR, SL, SR) placed in standard positions; a sound source signal separating unit (2) that calculates a sound source localization signal Z(i) indicating the sound image that is localized and separates, from the input audio signals, sound source non-localization signals (FLa, FRb, SLa, SLb) which are signal components not contributing to localization of the sound image; a sound source position parameter calculating unit (3) that calculates parameters (R, ?) indicating a position of the sound source localization signal in the acoustic space; and a reproduction signal generating unit (4) that uses the sound source position is parameters indicating the position of the sound source localization signal to distribute the sound source localization signal to front speake

Abstract: Provided is a complex exponential modulation filter bank which can reduce quantity of arithmetic operation, and can realize low electric power consumption or speeding-up. This complex exponential modulation filter bank has a step of calculating a first intermediate signal from an input signal, a step of calculating a second intermediate signal from the first intermediate signal, a step of calculating a third intermediate signal from the second intermediate signal with fast Fourier transform, and a step of calculating a complex band output signal from the third intermediate signal.

Abstract: Provided is a complex exponential modulation filter bank which can reduce quantity of arithmetic operation, and can realize low electric power consumption or speeding-up. This complex exponential modulation filter bank has a step of calculating a first intermediate signal from an input signal, a step of calculating a second intermediate signal from the first intermediate signal, a step of calculating a third intermediate signal from the second intermediate signal with fast Fourier transform, and a step of calculating a complex band output signal from the third intermediate signal.