Patent ID: 7050970

Claim:
A parametric encoder for encoding an audio or speech signal into sinusoidal code data, comprising: a segmentation unit for segmenting said signal into at least one segment; a calculation unit for calculating said sinusoidal code data in the form of the phase and amplitude data of an extension from the segment such that the extension approximates the segment; wherein the calculation unit is adapted to calculate the sinusoidal code data θ k i , d j i and e j i for the extension represented by: x ⋒ = ∑ i = 1 L ⁢ Ci = ∑ i = 1 L ⁢ ⁢ ∑ j = 0 J - 1 ⁢ ⁢ [ d j i ⁢ f j ⁡ ( n ) ⁢ cos ⁡ ( Θ i ⁡ ( n ) ) + e j i ⁢ f j ⁡ ( n ) ⁢ sin ⁡ ( Θ i ⁡ ( n ) ) ] ⁢ ⁢ with Θ i ⁡ ( n ) = ∑ k = 1 K - 1 ⁢ ⁢ θ k i ⁢ n k wherein: i,j,k represent parameters; n represents a discrete time parameter; Ci represents the i'th component of the extension {circumflex over (x)}; θ k i represents the phase coefficient as one of said sinusoidal data f j represents the jth instance out of the set of J linearly independent functions; Θ i is a phase; and d j i ,e j i represent the linearly involved amplitude values of the components representing parts of said sinusoidal data.