An audio decoder (100;200) for providing a decoded audio information (112;212) on the basis of an entropy-encoded audio information (110;210, 222,224), the audio decoder comprising: a context-based entropy decoder (120;240) configured to decode the entropy-encoded audio information (110;210,222,224) 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 (120;240) is configured to select a mapping information, for deriving the decoded audio information (112;212) from the encoded audio information, in dependence on the context, wherein the selected mapping information is used for deriving a first portion of the decoded audio information; and wherein the context-based entropy decoder (120;240) 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 (110;210), wherein the mapping information, which is based on the default context, is used for deriving a second portion of the decoded audio information, wherein the context resetter is configured to selectively reset the context-based entropy decoder (120;240) between a decoding of subsequent time portions (1010,1012) of the encoded audio information (110;210) having associated spectral data of the same spectral resolution; wherein the audio decoder is configured to receive, as the encoded audio information, an encoded audio information comprising a plurality of sets of spectral values per audio frame (1320,1330); and wherein the audio decoder is configured to also receive a grouping side information (scale_factor_grouping); and wherein the audio decoder is configured to group (1322a,1322c,1322d,1330c,1330d) two or more of the sets of spectral values for a combination with a common scale factor information in dependence on the grouping side information; wherein the context resetter is configured to reset the context (q,q) to the default context in response to the grouping side information (scale_factor_grouping); and wherein the context resetter is configured to reset the context (q,q) between a decoding of sets of spectral values of subsequent groups, and to avoid to reset the context between a decoding of sets of spectral values of a single group. a context-based entropy decoder (120;240) configured to decode the entropy-encoded audio information (110;210,222,224) 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 (120;240) is configured to select a mapping information, for deriving the decoded audio information (112;212) from the encoded audio information, in dependence on the context, wherein the selected mapping information is used for deriving a first portion of the decoded audio information; and wherein the context-based entropy decoder (120;240) 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 (110;210), wherein the mapping information, which is based on the default context, is used for deriving a second portion of the decoded audio information, wherein the context resetter is configured to selectively reset the context-based entropy decoder (120;240) between a decoding of subsequent time portions (1010,1012) of the encoded audio information (110;210) having associated spectral data of the same spectral resolution; wherein the audio decoder is configured to receive, as the encoded audio information, an encoded audio information comprising a plurality of sets of spectral values per audio frame (1320,1330); and wherein the audio decoder is configured to also receive a grouping side information (scale_factor_grouping); and wherein the audio decoder is configured to group (1322a,1322c,1322d,1330c,1330d) two or more of the sets of spectral values for a combination with a common scale factor information in dependence on the grouping side information; wherein the context resetter is configured to reset the context (q,q) to the default context in response to the grouping side information (scale_factor_grouping); and wherein the context resetter is configured to reset the context (q,q) between a decoding of sets of spectral values of subsequent groups, and to avoid to reset the context between a decoding of sets of spectral values of a single group.