发明名称 |
VERFAHREN UND VORRICHTUNG ZUM VERARBEITEN VON ZEITDISKRETEN AUDIO-ABTASTWERTEN |
摘要 |
An integer transform, which provides integer output values, carries out the TDAC function of a MDCT in the time domain before the forward transform. In overlapping windows, this results in a Givens rotation which may be represented by lifting matrices, wherein time-discrete sampled values of an audio signal may at first be summed up on a pair-wise basis to build a vector so as to be sequentially provided with a lifting matrix. After each multiplication of a vector by a lifting matrix, a rounding step is carried out such that, on the output-side, only integers will result. By transforming the windowed integer sampled value with an integer transform, a spectral representation with integer spectral values may be obtained. The inverse mapping with an inverse rotation matrix and corresponding inverse lifting matrices results in an exact reconstruction. |
申请公布号 |
AT282883(T) |
申请公布日期 |
2004.12.15 |
申请号 |
AT20020740659T |
申请日期 |
2002.05.28 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. |
发明人 |
GEIGER, RALF;SPORER, THOMAS;KOLLER, JUERGEN;BRANDENBURG, KARLHEINZ;HERRE, JUERGEN |
分类号 |
H03M7/30;G06F17/14;G10L19/02;(IPC1-7):G10L19/02 |
主分类号 |
H03M7/30 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|