| 摘要 |
Fast headphone virtualization techniques reduces the computational expense of providing multi-channel audio virtualization (which may also include reflection and reverberation effects) on headphones. First, the number of inverse Fast Fourier Transforms (FFT) involved in an FFT-based FIR filter headphone virtualization approach is reduced by summing the contributions of N-channels in the frequency domain prior to the inverse FFT. Second, the reverberation part of a room filter is implemented as a hybrid FIR/IIR filter, where subsequent filter segments are approximated by successively scaling the result of an initial reverberation filter segment. Third, a low pass filter is added in the hybrid FIR/IIR filter to provide warmth control.
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