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.
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
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