发明名称 |
MULTI-MODE AUDIO CODEC |
摘要 |
In an embodiment, bitstream elements of sub-frames are encoded differentially to a global gain value so that a change of the global gain value results in an adjustment of an output level of the decoded representation of the audio content. Concurrently, the differential coding saves bits. Even further, the differential coding enables the lowering of the burden of globally adjusting the gain of an encoded bitstream. In another embodiment, a global gain control across CELP coded frames and transform coded frames is achieved by co-controlling the gain of the codebook excitation of the CELP codec, along with a level of the transform or inverse transform of the transform coded frames. In another embodiment, the gain value determination in CELP coding is performed in the weighted domain of the excitation signal. |
申请公布号 |
EP2491555(B1) |
申请公布日期 |
2014.03.05 |
申请号 |
EP20100766284 |
申请日期 |
2010.10.19 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. |
发明人 |
GEIGER, RALF;FUCHS, GUILLAUME;MULTRUS, MARKUS;GRILL, BERNHARD |
分类号 |
G10L19/083;G10L19/08;G10L19/20 |
主分类号 |
G10L19/083 |
代理机构 |
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