Abstract
An audio decoder 2200 for providing decoded audio information 2212 based on encoded audio information 2210 may generate a plurality of decoded spectral values 2224 using an arithmetically-encoded representation 2222 of the spectral values. Domain-to-time-domain converter 2220 for providing a time-domain audio representation using decoded spectral values 2224 to obtain decoded audio information, (2230). The arithmetic decoder is configured to select a mapping rule that describes a mapping of the code value to a symbol code depending on the context state. The arithmetic decoder is operative to determine a numerical current context value that describes the current context state depending on a plurality of previously decoded spectral values and depending on whether a spectral value to be decoded is within a first predetermined frequency domain or a second predetermined frequency domain a numeric current context value. The audio encoder provides the encoded audio information based on the input audio information.
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