发明名称 |
METHOD FOR ENHANCING LOW FREQUENCES IN A DIGITAL AUDIO SIGNAL |
摘要 |
The method comprises the steps of: a) converting the digital audio signal (PCM) into a voltage signal (VE); b) first lowshelf filtering of fixed gain (G2); c) calculating a value of excursion (x) of the loudspeaker; d) comparing the excursion with a maximum value and calculating a first gain of possible attenuation (G3); e) second lowshelf filtering of gain (G4+G3) taking into account the first gain of possible attenuation; g) comparing with the maximum saturation or clipping voltage (vMAX) and calculating a second gain of possible attenuation (G5); h) third lowshelf filtering gain (G6+G3+G5) taking into account the first and/or second gains of possible attenuation; i) comparing with the maximum saturation or clipping voltage (vMAX) and applying a gain of possible overall attenuation (G7); j) optionally compensating for the nonlinearities of the loudspeaker response; and k) reversely converting the signal (Vs) into a digital audio signal (S) without dimension, for later amplification.
|
申请公布号 |
US2013230191(A1) |
申请公布日期 |
2013.09.05 |
申请号 |
US201213597193 |
申请日期 |
2012.08.28 |
申请人 |
HOANG CO THUY VU;POCHON BENOIT;PARROT |
发明人 |
HOANG CO THUY VU;POCHON BENOIT |
分类号 |
H03G3/00 |
主分类号 |
H03G3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|