| 摘要 |
The present invention provides an audio enhancement apparatus (1604) and method which spectrally shapes harmonics of the low-frequency information in a pair of audio signals so that when reproduced by loudspeakers (1606, 1608), a listener perceives the loudspeakers (1606, 1608) as having more acoustic bandwidth than is actually provided by the loudspeakers (1606, 1608). The perception of extra bandwidth is particularly pronounced at low frequencies, especially frequencies at which the loudspeakers (1606, 1608) produce less acoustic output energy. In one embodiment, the invention also shifts from one audio signal to the other audio signal in order to reduce clipping. In one embodiment, the invention also provides a combined signal path for spectral shaping of the desired harmonics and a feedforward signal path for each pair of audio signals.
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