Audio encoder, audio decoder, encoded audio information, methods for encoding and decoding an audio signal and computer program

摘要

An audio decoder for providing a decoded audio information on the basis of an encoded audio information includes a window-based signal transformer configured to map a time-frequency representation, which is described by the encoded audio information, to a time-domain representation. The window-based signal transformer is configured to select a window, out of a plurality of windows including windows of different transition slopes and windows of different transform length, on the basis of a window information. The audio decoder includes a window selector configured to evaluate a variable-codeword-length window information in order to select a window for a processing of a given portion of the time-frequency representation associated with a given frame of the audio information.

主权项

1. An audio decoder for providing a decoded audio information on the basis of an encoded audio information, the audio decoder comprising:
a window-based signal transformer configured to map a time-frequency representation of the audio information, which is described by the encoded audio information, to a time-domain representation of the audio information, wherein the window-based signal transformer is configured to select a window, out of a plurality of windows comprising windows of different transition slopes and windows having associated therewith different transform lengths using a window information; wherein the audio decoder comprises a window selector configured to evaluate a variable-codeword-length window information in order to select a window for a processing of a given portion of the time-frequency representation associated with a given frame of the audio information; wherein the audio decoder is implemented using a hardware apparatus, or using a computer, or using a combination of a hardware apparatus and a computer.