Apparatus for localization of sound image
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorYoshinori Kumamoto
Life of this patent
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Abstract
A sound image localization apparatus comprises crosstalk canceling means and direction localizing means, wherein first the crosstalk canceling means first subject an input sound signal to crosstalk cancellation, and then, the direction localizing means subject the processed signal to directional localization, whereby both crosstalk cancellation and directional localization share a signal to be processed, so the necessary amount of a storage device to hold the signal is reduced. That is, a reduction in circuit scale and calculation load can provide a sound image localization apparatus with low cost and high processing precision.
Claims10
A sound image localization apparatus receiving a sound signal, performing signal processing to the sound signal, localizing a virtual sound image, and outputting a sound image localization signal, said apparatus comprising:
- (a) direction localizing means for localizing the direction of a virtual sound source position;
- and
- (b) crosstalk canceling means for performing crosstalk cancellation and including
- (1) a crosstalk canceling signal generating filter generating a crosstalk canceling signal and outputting the crosstalk canceling signal toward the direction where the sound signal is input;
- and
- (2) a switch for switching the crosstalk canceling signal generated by said crosstalk canceling signal generating filter to one of the output side of said crosstalk canceling signal generating filter and the input.
A sound image localization apparatus receiving a sound signal, performing signal processing to the sound signal, localizing a virtual sound image, and outputting a sound image localization signal, said apparatus comprising:
- direction localizing means for localizing the direction of a virtual sound source position, said apparatus processing an input sound signal to be localized in a first direction and in a second direction;
- and
- crosstalk canceling means for performing crosstalk cancellation by generating a crosstalk canceling signal and outputting the crosstalk canceling signal toward the direction of where the sound signal is input, said crosstalk canceling means including a fist filter having a certain number of taps, a second filter different from said first filter, and a switch switching between first and second modes, in the first mode said first filter functioning as a filter generating the crosstalk canceling signal, and in the second mode said second filter functioning as a filter generating the crosstalk canceling signal while said first filter functions as a filter localizing the second direction.
Dependencies are inferred from the claim text.