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 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 or modify the current contextual state in a manner dependent on a plurality of previously decoded spectral values. The arithmetic decoder has a configuration that allows it to detect a group of a plurality of previously decoded spectral values that satisfy, considered individually or together, a predetermined condition related to their magnitudes, and determine the current contextual state depending on a result obtained. With the detection. An audio encoder uses similar principles.
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