Patent ID: 8243935
Filing Date: 2012-08-14
Classification: H04R,H04S

Abstract:
1. A sound image localization control apparatus that provides sound image localization for at least two listeners, the sound image localization control apparatus comprising: an input section through which an acoustic signal is externally inputted; a plurality of controlling means, each controlling means of the plurality of controlling means including a digital filter for processing the acoustic signal inputted through the input section, such that each respective digital filter of the plurality of controlling means processes the acoustic signal according to a respective filter coefficient; processing characteristic setting means (i) storing, in a storage area and for each respective digital filter of the plurality of controlling means, a reference coefficient corresponding each respective listener of the at least two listeners, (ii) calculating, for each respective digital filter, a respective multiplication coefficient for each respective listener of the at least two listeners by multiplexing (a) a value based on at least one of a sound volume control signal and a sound quality control signal corresponding to the respective listener and (b) the stored reference coefficient corresponding to the respective listener and the respective digital filter, and (iii) determining the respective filter coefficient for each respective digital filter by summing, for each respective digital filter, the multiplication coefficient calculated for each respective listener; and a plurality of sound reproducing means, each respective sound reproducing means of the plurality of sound reproducing means corresponding to a respective controlling means of the plurality of controlling means, and each respective sound reproducing means being for receiving an output from the corresponding controlling means of the plurality of controlling means, wherein a difference between acoustic transfer functions from the input section to positions of both ears of each respective listener is constant regardless of the at least one of the sound volume control signal and the sound quality control signal.