Patent ID: 8630862

Claim:
An audio signal encoder for providing an encoded representation of an audio content on the basis of an input representation of the audio content, the audio signal encoder comprising: a transform-domain path configured to acquire a set of spectral coefficients and noise-shaping information on the basis of a time-domain representation of a portion of the audio content to be encoded in a transform-domain mode, such that the spectral coefficients describe a spectrum of a noise-shaped version of the audio content; wherein the transform-domain path comprises a time-domain-to-frequency-domain converter configured to window a time-domain representation of the audio content, or a pre-processed version thereof, to acquire a windowed representation of the audio content, and to apply a time-domain-to-frequency-domain conversion, to derive a set of spectral coefficients from the windowed time-domain representation of the audio content; and an code-excited linear-prediction-domain path (CELP path) configured to acquire an code-excitation information and a linear-prediction-domain parameter information on the basis of a portion of the audio content to be encoded in an code-excited linear-prediction-domain mode (CELP mode); wherein the time-domain-to-frequency-domain converter is configured to apply a predetermined asymmetric analysis window for a windowing of a current portion of the audio content to be encoded in the transform-domain mode and following a portion of the audio content encoded in the transform-domain mode both if the current portion of the audio content is followed by a subsequent portion of the audio content to be encoded in the transform-domain mode and if the current portion of the audio content is followed by a subsequent portion of the audio content to be encoded in the CELP mode; and wherein the audio signal encoder is configured to selectively provide an abasing cancellation information, which represents aliasing cancellation signal components which would be represented by a transform-domain mode representation of the subsequent portion of the audio content, if the current portion of the audio content is followed by a subsequent portion of the audio content to be encoded in the CELP mode.