Sound image localizer

Abstract

The present invention relates to a sound image localizing apparatus for generating a sound image localized in an arbitrarily set three-dimensional direction. The sound image direction setting unit (111) is operable to set a three-dimensional direction to which the sound image is to be localized in accordance with a listener's instruction; the angle conversion unit (112) is operable to convert the direction into a lateral angle (alpha) and a rising angle (beta), each of which serves as a cue for the listener to perceive the direction. The convolution operation unit 116 is operable to obtain lateral angle control information corresponding to the lateral angle (alpha) from the lateral angle control information storage unit (113), a listener's front direction head-related impulse response from the front direction head-related impulse response storage unit (115), and rising angle difference information corresponding to the rising angle (beta) from the rising angle difference information storage unit (114). The convolution operation unit 116 is then operable to convolute the sound source signal with the lateral angle control information, the front direction head-related impulse response, and the rising angle difference information, and output the operation result.

Description

technical field [0001] The present invention relates to an audio-image localization device for generating audio-image along any set three-dimensional direction. Background technique [0002] As such an audio-visual localization device, there is, for example, the audio-video localization device described in (Japanese) Patent No. 2741817, as shown in FIG. 19 . [0003] In this sound image localization device, the input terminal of the A / D conversion unit 2110 is connected to a test sound source. The convolution operation unit 2120 includes a left ear convolution operation unit (1) 2120L and a right ear convolution operation unit (r) 2120R, and each output is converted into an analog by each channel of the D / A conversion unit 2130 having two channels. The signal is output to two-ear headphones (not shown) including earbud type or in-ear type. In the spatial impulse response storage unit 2150 and the headphone inverse impulse response storage unit 2160, typical filter coeffici...

AI Technical Summary

Problems solved by technology

[0005] However, such a conventional audio-image localization device has the following problem: in order to generate a typical filter bank, it is necessary to measure the spatial impulse response, that is, the head impulse response, for all directions to which the audio-image is desired to be localized, for many people, Measurement requires a lot of time and labor

[0006] In addition, there is a problem that the generated typical filter bank must be stored, requiring a large storage capacity

[0007] In addition, there is a problem that although the inverse characteristic of the headphone is convoluted to the sound source signal, the change in the transfer function of the external auditory canal when the headphone is worn is not corrected, and when the earphone or the headphone is worn Correct audiovisual positioning cannot be performed in the case of

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