| 摘要 |
Filter banks may have different structures and different individual output signal domains. Often atranslation between different filter bank domains is desirable. Usually,mapping matrices are used thathowever vary over frequency. Thisrequires a significant amount of lookup tables.A method fortransforming first data frames of a first filter bank domain (D) to second data frames of a different second filter bank domain (D), comprises steps of transcoding sub-bands (mp3(m-1), mp3(m), mp3(m+1)) of the first filter bank domain (D) into sub-bands (psdo(m-1), psdo(m), psdo(m+1)) of an intermediate domain (D) that corresponds to said second filter bank domain but has warped phase, and transcoding the sub-bands (psdo(m-1), psdo(m), psdo(m+1)) ofthe intermediate domain (D)to sub- bands (MDCT(m-1), MDCT(m), MDCT(m+1)) of the second filter bankdomain (D), wherein a phase correction (SSC, PCp, PC, PCn) is performed on thesub-bands of the intermediate domain (D). |
