| 摘要 |
<p>The invention relates to an apparatus for processing an audio signal. The apparatus comprises a low delay decimated analysis filter bank comprising M analysis filters. M is greater than 1 and the M analysis filters are generated based on an asymmetric prototype filter po(n) having a length N. The apparatus further comprises a 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 are modulated versions of the asymmetric prototype filter po(n) according to: exp jr (k+)(21+129) Ok<64 ( 128 2 and the M synthesis filters are modulated versions of the asymmetric prototype filter po(n) according to: - exp j (k + 1)(21-255) , 0<I<128. 64 128 2 )</p> |
