发明名称 |
APPARATUS AND METHOD FOR ENCODING/DECODING AN AUDIO SIGNAL USING AN ALIASING SWITCH SCHEME |
摘要 |
An apparatus for encoding an audio signal comprises the windower (11) for windowing a first block of the audio signal using an analysis window having an aliasing portion and a further portion. The apparatus furthermore comprises a processor (12) for processing the first sub-block of the audio signal associated with the aliasing portion by transforming the sub-block from a domain into a different domain subsequent to windowing the first sub-block to obtain the processed first sub-block, and for processing a second sub-block of the audio signal associated with the further portion by transforming the second sub-block from the domain into the different domain before windowing the second sub-block to obtain a processed second sub-block. The apparatus furthermore comprises a transformer (13) for converting the processed first sub-block and the processed second sub-block from the different domain into a further different domain using the same block transform rule to obtain a converted first block which may then be compressed using any of the well-known data compression algorithms. Thus, a critically sampled switch between two coding modes can be obtained, since aliasing portions occurring in two different domains are matched to each other. |
申请公布号 |
CA2730355(A1) |
申请公布日期 |
2010.01.14 |
申请号 |
CA20092730355 |
申请日期 |
2009.06.17 |
申请人 |
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FOERSCHUNG E.V. |
发明人 |
FUCHS, GUILLAUME;LECOMTE, JEREMIE;BAYER, STEFAN;GEIGER, RALF;MULTRUS, MARKUS;SCHULLER, GERALD;HIRSCHFELD, JENS |
分类号 |
G10L19/02;G10L19/04;G10L19/14 |
主分类号 |
G10L19/02 |
代理机构 |
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地址 |
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