发明名称 |
AUDIO ENCODING AND DECODING |
摘要 |
<p>A method of encoding a digital audio signal, wherein for each time segment the signal is spectrally flattened to obtain a spectrally flattened signal (r) and possibly spectral flattening parameters (LPP). The spectrally flattened signal is modelled by an excitation signal comprising a first partial excitation signal (p<SUB>x</SUB>) conforming to an excitation signal generated by an RPE or CELP technique, and a second partial excitation signal (P<SUB>E</SUB><SUB><SUB2>p</SUB2></SUB>) being a set of extra pulses with arbitrary positions and amplitudes. An audio bit stream as comprising the first and second partial excitation signals is generated. The extra pulses can be added to the excitation signal at positions in time that correspond to the time of occurrence of the spike, or preferably at positions in time of an RPE time grid.</p> |
申请公布号 |
EP1761916(A1) |
申请公布日期 |
2007.03.14 |
申请号 |
EP20050751672 |
申请日期 |
2005.06.15 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
DEN BRINKER, ALBERTUS, C.;GERRITS, ANDREAS, J.;RIERA PALOU, FELIPE |
分类号 |
G10L19/10;G10L19/113 |
主分类号 |
G10L19/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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