发明名称 |
AUDIO CODING |
摘要 |
A method of encoding (14) an audio signal (x(n)) is disclosed. The method comprises the step of modelling (16) the audio signal in accordance with a frequency sensitizing parameter (() to provide a set of infinite impulse response (IIR) filter type characteristics ((0...k-1) of an order K and capable of being linearly combined with the sensitizing parameter (() to provide an estimate () for the audio signal (x(n)), the IIR type filter model satisfying the requirements of a minimum phase filter. The set of characteristics ((0...k-1) of order K are transformed as a function of the sensitizing parameter (() to provide a set of characteristics (c0...k) of order K+1 compatible with finite impulse response (FIR) filter type characteristics satisfying the requirements of a minimum phase filter. The set of characteristics (c0...k) of order K+1 are normalised to provide a set of characteristics (d1...k) of order K. An encoded audio stream (50) is generated to include representations (LAR,LSFs) of the normalised set of characteristics (d1...k) of order K.
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申请公布号 |
WO03102922(A1) |
申请公布日期 |
2003.12.11 |
申请号 |
WO2003IB02044 |
申请日期 |
2003.05.16 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;DEN BRINKER, ALBERTUS, C. |
发明人 |
DEN BRINKER, ALBERTUS, C. |
分类号 |
G10L19/06;G10L19/04;G10L25/12;(IPC1-7):G10L19/04 |
主分类号 |
G10L19/06 |
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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