摘要 |
<p>In many audio playback systems, frequencies below a given cut off frequency are suppressed either due to speaker constraints or safety constraints. For example, some speakers are only capable of generating signals above a certain frequency. Prolonged low frequency sound can cause damage to speakers or other components. An audio driver can be equipped with a phantom bass module which by doubling, tripling and/or quadrupling frequencies below a cutoff frequency can simulate the bass experience. The doubling, tripling and quadrupling methods disclosed provide a low complexity formulation of a frequency doubling, tripling and quadrupling. In addition, the frequency doubling, tripling and quadrupling formulations are easily adapted to multi-rate processing, where computational savings can be very high.</p> |
申请人 |
CONEXANT SYSTEMS, INC., A DELAWARE CORPORATION;JONSSON, RAGNAR, H.;THORMUNDSSON, TRAUSTI;LAU, HARRY, K. |
发明人 |
JONSSON, RAGNAR, H.;THORMUNDSSON, TRAUSTI;LAU, HARRY, K. |