AUDIO REPRODUCTION APPARATUS AND AUDIO REPRODUCTION METHOD
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Abstract
An audio reproduction apparatus is provided which is capable of maintaining the sense of dimensions in an acoustic space even when multi-channel input audio signals are reproduced using speakers having different frequency characteristics. The audio reproduction apparatus includes: a sound source position parameter calculating unit (3) that calculates a localization position of a sound image when reproduced by each of the first and second speaker groups; a reproduction signal generating unit (4) that generates a reproduction signal by separating, from audio signals corresponding to the second speaker group, audio signals representing a sound having a sound pressure level higher when reproduced by the first speaker group than the second speaker group; and a signal correction unit (8) that corrects reproduction signals such that the sound image localized according to the reproduction signals are localized at a substantially identical position to the calculated localization position; and a delay time adjusting unit (9).
138 Citations
16 Claims
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1-8. -8. (canceled)
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9. An audio reproduction apparatus comprising:
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a calculating unit configured to calculate a localization position of a sound image that is localized when it is assumed that audio signals corresponding to a first speaker group are reproduced by the first speaker group and audio signals corresponding to a second speaker group are reproduced by the second speaker group, the first speaker group including a plurality of speakers, and the second speaker group including a plurality of speakers having frequency characteristics different from frequency characteristics of the first speaker group; a generating unit configured to generate reproduction signals by (i) separating, from the audio signals corresponding to the second speaker group, audio signals each of which represents a sound that is included in a predetermined frequency range and has a sound pressure level that is higher when reproduced by the first speaker group than when reproduced by the second speaker group, among sounds represented by the audio signals corresponding to the second speaker group and (i) adding the separated audio signals to the audio signals corresponding to the first speaker group, each of the reproduction signals being for a corresponding one of the first speaker group and the second speaker group; and a correcting unit configured to correct the reproduction signals such that the sound image localized according to the reproduction signals is localized at a position substantially identical to the calculated localization position, each of the reproduction signals being generated for a corresponding one of the first speaker group and the second speaker group. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An audio reproduction method comprising:
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calculating a localization position of a sound image that is localized when it is assumed that audio signals corresponding to a first speaker group are reproduced by the first speaker group and audio signals corresponding to a second speaker group are reproduced by the second speaker group, the first speaker group including a plurality of speakers, and the second speaker group including a plurality of speakers having frequency characteristics different from frequency characteristics of the first speaker group; generating reproduction signals by (i) separating, from the audio signals corresponding to the second speaker group, audio signals each of which represents a sound that is included in a predetermined frequency range and has a sound pressure level that is higher when reproduced by the first speaker group than when reproduced by the second speaker group, among sounds represented by the audio signals corresponding to the second speaker group and (i) adding the separated audio signals to the audio signals corresponding to the first speaker group, each of the reproduction signals being for a corresponding one of the first speaker group and the second speaker group, and correcting the reproduction signals such that the sound image localized according to the reproduction signals is localized at a position substantially identical to the calculated localization position, each of the reproduction signals being generated for a corresponding one of the first speaker group and the second speaker group.
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Specification