Abstract
An audio decoder for providing decoded audio information on the basis of encoded audio information comprises an arithmetic decoder for providing a plurality of decoded spectral values based on an arithmetically encoded representation of the spectral values and a frequency domain converter a temporary domain to provide a temporary domain audio representation that uses decoded spectral values, to obtain the decoded audio information. The arithmetic decoder has a configuration that allows you to select a mapping standard that describes a mapping of a code value to a symbol code in a manner dependent on a contextual state. The arithmetic decoder has a configuration that allows it to determine a numerical current contextual value that describes the current contextual state in a manner dependent on a plurality of previously decoded spectral values and also in a manner that depends on a spectral value to be decoded in a first predetermined frequency region or in a second predetermined frequency region. An audio encoder provides encoded audio information based on an incoming audio information.
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