Sound image control apparatus and sound image control method

Abstract

A sound image control apparatus and sound image control method capable of increasing the accuracy, in particular, in the distance direction while keeping fixed intervals of transmission characteristic filters, without increasing the number of the transmission characteristic filters. Sound image control apparatus (100) is provided with distance gain control section (101) that performs gain control of the sound pressure of an input monaural audio signal of one channel in the distance direction from a head to a sound image before input to virtual sound field 1 sound image localization section (120) and virtual sound field 2 sound image localization section (130), and reflected sound gain control section (102) that performs gain control by distance of a reflected sound of the sound pressure of the input monaural audio signal of one channel before input to virtual reflected sound generating section (150) that controls the sound image to be localized outside the head when the sound is listened to with headphones.

Description

[0001] The contents of the specification, drawings and abstract of Japanese Patent No. 2006-164884 filed on June 14, 2006 are hereby incorporated by reference. technical field [0002] The present invention relates to a sound and image control device and a sound and image control method, which control the sound and image by utilizing the transfer characteristic reproduced by a digital filter and convolving it in the original original sound (hereinafter referred to as "source sound") positioning. Background technique [0003] When a human listens to sound, the transfer characteristics change depending on the direction of the sound source position, affected by the shape of the head and the pinnae of the ear. There is an audio image control device that utilizes this fact to reproduce the transfer characteristic with a digital filter and convolve it in the original sound, thereby controlling the localization of the audio image. [0004] For example, Patent Document 1 (Japanese ...

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Problems solved by technology

[0017] However, in such a conventional audio-visual control device, although the amount of data can be expected to be reduced to a certain extent, since the intervals of the prepared transfer characteristic filters are not fixed, the coordinates near the coordinate point of the selected destination The control method becomes complicated when the transfer characteristic filter, etc., the coordinate point of the moving destination is calculated based on the moving instruction for audiovisual control

As a result, problems such as an increase in the circuit scale of the audio-visual control unit for audio-visual control, and an increase in the amount of computation arise

[0018] In addition, there is also a problem in the distance direction. Since it is necessary to prepare transfer characteristic filters for all azimuths for each distance, if the accuracy in the distance direction is to be further improved, it is necessary to provide filters for all azimuths for one distance. Transfer characteristic filters, thus requiring a huge number of transfer characteristic filters

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