Patent ID: 8041578

Claim:
A decoder comprising an extractor for extracting, from an encoded information signal, an encoded low-frequency portion of an information signal, information specifying a temporal grid such that at least one grid area extends across a frame boundary of two adjacent frames of the information signal so as to overlap with the two adjacent frames, and a representation of a spectral envelope of a high-frequency portion of the information signal; a low-frequency portion decoder for decoding the encoded low-frequency portion of the information signal in units of the frames of the information signal; a determinator for determining a preliminary high-frequency portion signal on the basis of the decoded low-frequency portion; and an adaptor for spectrally adapting the preliminary high-frequency portion signal to the spectral envelopes by means of spectrally weighting the preliminary high-frequency portion signal by means of deriving, from the representation of the spectral envelopes in the temporal grid, a representation of the spectral envelopes in a subdivided temporal grid, wherein the grid area overlapping with the two adjacent frames is subdivided into a first partial grid area and a second partial grid area, which border on one another at the frame boundary, and by means of performing the adaptation of the preliminary high-frequency portion signal to the spectral envelopes by spectrally weighting the preliminary high-frequency portion signal in the subdivided temporal grid, wherein at least one of the low-frequency portion decoder, the determinator and the adaptor comprises a hardware implementation.