Sony Corporation

Sony Group Corporation

Yu Maeno

Yuhki Mitsufuji

Tetsu Magariyachi

Masafumi Takahashi

Yoshiaki Oikawa

Provided is a sound field forming apparatus and method to improve reproducibility of a wave front by using a smaller amount of computation. The sound field forming apparatus includes a listener position acquisition section that acquires listener positional information indicating a position of a listener, a drive speaker selection section that selects one or a plurality of speakers, as a drive speaker, used to form a sound field, among the speakers configuring a speaker array on the basis of the listener positional information, and a drive signal generation section that drives the drive speaker and generates a speaker drive signal for forming the sound field in accordance with a selection result of the drive speaker.

Sound field forming apparatus and method

A sound processing device is provided with a correction unit that corrects a sound pickup signal. The sound pickup signal is obtained by picking up a sound with a microphone array. The correction unit corrects the sound pickup signal based on directional information that indicates a direction of the microphone array in spherical coordinates, during the picking up of the sound.

Sound processing device, method and program

The present technology relates to a speaker array designed to be capable of achieving sufficiently high reproducibility at low cost, and a signal processing apparatus. The speaker array is formed with a plurality of higher order speakers and a plurality of general speakers. The type, the number, or the installation positions of the higher order speakers are determined in accordance with wavefront reproducibility in a second region located on the outer side of a first region that can be controlled by the general speakers. The present technology can be applied to a speaker array and a sound field forming apparatus.

Speaker array, and signal processing apparatus

Provided are a sound field forming apparatus and a method that enhances the reproducibility of a wavefront at a listener position. The sound field forming apparatus has a position acquisition unit to acquire position information indicative of a position of a listener or a position of a sound source to be formed, a control point specification unit to specify a control point with a distance from a speaker array of the listener or the sound source on the basis of the position information, and a filter unit to generate a speaker drive signal for forming a predetermined sound field by the speaker array by convoluting a filter coefficient corresponding to the specified control point with a sound source signal.

The present technology relates to a signal processing device, a signal processing method, and a program that enable different sounds to be reproduced in a remote location and a neighboring location. A signal processing device includes: a remote filter unit configured to generate a remote sound reproduction signal for reproducing a sound in a remote audible region, by performing filter processing on a first sound source signal using a remote sound reproduction filter coefficient; and a neighboring filter unit configured to generate a neighboring sound reproduction signal for reproducing a sound in a neighboring audible region that is different from the remote audible region, by performing filter processing on a second sound source signal using a neighboring sound reproduction filter coefficient. The present technology can be applied to a remote-neighborhood separate sound field formation device.

Signal processing device, method, and program stored on a computer-readable medium, enabling a sound to be reproduced at a remote location and a different sound to be reproduced at a location neighboring the remote location

There is provided a local sound field forming apparatus including a local sound field forming filter coefficient recording unit that records an audio filter coefficient for forming a sound field by an evanescent wave, a filter unit that convolves the audio filter coefficient and a sound source signal to generate a loudspeaker drive signal, and a loudspeaker array that includes a plurality of loudspeakers including a directional loudspeaker, and that reproduces a sound on the basis of the loudspeaker drive signal. The present technology can be applied to a local sound field forming apparatus.

Local sound field forming apparatus and local sound field forming method

The present technique relates to sound processing apparatus and method, and a program that can more efficiently reproduce sound; A sound processing apparatus includes: a head direction acquisition unit that acquires a head direction of a user listening to sound; a rotation matrix generation unit that selects two first rotation matrices on the basis of the head direction from a plurality of first rotation matrices for rotation in a first direction held in advance, selects one second rotation matrix on the basis of the head direction from a plurality of second rotation matrices for rotation in a second direction held in advance, and generates a third rotation matrix on the basis of the selected two first rotation matrices and the selected one second rotation matrix; and a head-related transfer function composition unit that composes an input signal in a spherical harmonic domain, a head-related transfer function in the spherical harmonic domain, and the third rotation matrix to generate a headphone drive signal in a time-frequency domain; The present technique can be applied to a sound processing apparatus.

Sound processing apparatus and method, and program

Provided is an audio processing device and method, in which sound can be more efficiently reproduced. An audio processing device includes a matrix generation unit which generates a vector for each time-frequency with a head-related transfer function obtained by spherical harmonic transform by spherical harmonics as an element by using only the element corresponding to a degree of the spherical harmonics determined for the time-frequency or on the basis of the element common to all users and the element dependent on an individual user, and a head-related transfer function synthesis unit which generates a headphone drive signal of a time-frequency domain by synthesizing an input signal of a spherical harmonic domain and the generated vector.

Audio processing device and method

The present technology relates to a locally silenced sound field forming apparatus and method capable of controlling a silenced area in a depth direction. The locally silenced sound field forming apparatus includes a first speaker array that outputs a sound on the basis of a first speaker drive signal to form a predetermined sound field, and a second speaker array arranged at a position different from the position of the first speaker array and that outputs a sound on the basis of a second speaker drive signal to form a sound field that cancels the predetermined sound field. The present technology can be applied to a locally silenced sound field forming apparatus.

Locally silenced sound field forming apparatus and method

The present technique relates to an acoustic tube and an acoustic reproduction apparatus that can generate an evanescent wave at a lower cost. An acoustic tube includes an acoustic path longer than an external dimension of the acoustic tube and includes a plurality of opening portions or a slit-like opening portion. When a sound wave advances in the acoustic tube, sound waves are output from the plurality of opening portions or from a plurality of positions of the slit-like opening portion, and the sound waves are combined to form an evanescent wave. The present technique can be applied to an acoustic tube, an acoustic reproduction apparatus including the acoustic tube, and the like.

Acoustic tube and acoustic reproduction apparatus

The present technology relates to a sound processing apparatus, a method, and a program that can reproduce an acoustic field more appropriately. A sound source position correction unit corrects sound source position information indicating a position of each object sound source, on the basis of a hearing position of a sound, and derives corrected sound source position information. A reproduction area control unit calculates, on a basis of an object sound source signal of a sound of an object sound source, the hearing position, and corrected sound source position information obtained by the correction, a spatial frequency spectrum such that a reproduction area is adjusted in accordance with the hearing position provided inside a spherical or annular speaker array. The present technology can be applied to a sound processing apparatus.

Sound processing apparatus, method, and program

The present technology relates to an audio processing apparatus, a method, and a program that aim at enabling a sound to be reproduced more efficiently. A head-related transfer function synthesis section previously holds a matrix of a diagonalized head-related transfer function. The head-related transfer function synthesis section synthesizes an input signal in an annular harmonic domain for reproducing a sound and the previously held and diagonalized head-related transfer function. An annular harmonic inverse transformation section performs an annular harmonic inverse transformation on a signal obtained as a result of the synthesis by the head-related transfer function synthesis section on the basis of an annular harmonic function and thereby generates a headphone driving signal in a time frequency domain. The present technology is applicable to an audio processing apparatus.

Audio processing apparatus, method, and program

The present technology relates to a signal processing device, a signal processing method, and a program, which are capable of reproducing an acoustic field more appropriately in accordance with content. A decoding unit decodes a multiplexed signal, and obtains a multichannel sound collection signal obtained by performing sound collection through a linear microphone array and spatial correction information for selecting a spatial correction scheme for correcting a spatial transfer characteristic. A spatial correction scheme selecting unit selects the spatial correction scheme on the basis of the spatial correction information, and a spatial transfer characteristic matrix generating unit outputs a spatial transfer characteristic matrix indicated by a selection result of the spatial correction scheme. A drive signal generating unit generates a speaker drive signal of a spatial frequency domain on the basis of the multichannel sound collection signal and the spatial transfer characteristic matrix. The present technology can be applied to a spatial correction controller.

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Tokyo, Japan

Yu Maeno