| 摘要 |
The present invention relates to an apparatus for processing an audio signal. The apparatus comprises a down sampled low delay decimated analysis filter bank comprising M analysis filters, wherein M is greater than 1 and wherein the M analysis filters are generated based on an asymmetric prototype filter po(n) having a length N. The apparatus further comprises a down sampled low delay decimated synthesis filter bank comprising M synthesis filters, wherein the M synthesis filters are generated based on the asymmetric prototype filter po(n). The M analysis filters and the M synthesis filters are interpolated from the asymmetric prototype filter po(n) according to: I[p(2i+1)+ po(2i)], o < i < 320. 2 |
