| 摘要 |
<p>Systems and methods for audio signal processing are disclosed, where a discrete number of simple digital filters (266) are generated for particular portions of an audio frequency range. Studies have shown that certain frequency ranges are particularly important for human ears' location-discriminating capability, while other ranges are generally ignored. Head-Related Transfer Functions (HRTFs) (170) are examples response functions that characterize how ears perceive sound positioned at different locations. By selecting one or more "location-critical" portions (172, 174) of such response functions, one can construct simple filters (180) that can be used to simulate hearing where location-discriminating capability is substantially maintained. Because the filters can be simple, they can be implemented in devices (550, 562) having limited computing power and resources to provide location-discrimination responses that form the basis for many desirable audio effects.</p> |
