1. An audio decoder for providing a decoded audio information on the basis of an entropy encoded audio information, the audio decoder comprising: a context-based entropy decoder configured to decode the entropy-encoded audio information in dependence on a context, which context is based on a previously-decoded audio information in a non-reset state-of-operation; wherein the context-based entropy decoder is configured to select a mapping information, for deriving the decoded audio information from the encoded audio information, in dependence on the context; and wherein the context-based entropy decoder comprises a context resetter configured to reset the context for selecting the mapping information to a default context, which default context is independent from the previously-decoded audio information, in response to a side information of the encoded audio information.
3. The audio decoder according to claim 1 , wherein the audio decoder is configured to receive, as a component of the encoded audio information, an information describing spectral values in a first audio frame and in a second audio frame subsequent to the first audio frame; wherein the audio decoder comprises a spectral-domain-to-time-domain transformer configured to overlap-and-add a first windowed time domain signal, which is based on the spectral values of the first audio frame, and a second windowed time domain signal, which is based on the spectral values of the second audio frame, to derive the decoded audio information; wherein the audio decoder is configured to separately adjust window shapes of a window for acquiring the first windowed time domain signal and of a window for acquiring a second windowed time domain signal; and wherein the audio decoder is configured to perform, in response to the side information, a reset of the context between a decoding of the spectral values of the first audio frame and a decoding of the spectral values of the second audio frame, even if the second window shape is identical to the first window shape, such that the context used for decoding the encoded audio information of the second audio frame is independent from the decoded audio information of the first audio frame if the side information indicates to reset the context.