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首页> 外国专利> AUDIO ENCODER, AUDIO DECODER, METHOD OF CODING AND DECODING AUDIO INFORMATION AND COMPUTER PROGRAM, DETERMINING VALUE OF CONTEXT SUB-ADAPTION BASED ON NORM OF THE DECODED SPECTRAL VALUES

AUDIO ENCODER, AUDIO DECODER, METHOD OF CODING AND DECODING AUDIO INFORMATION AND COMPUTER PROGRAM, DETERMINING VALUE OF CONTEXT SUB-ADAPTION BASED ON NORM OF THE DECODED SPECTRAL VALUES

机译：音频编码器，音频解码器，音频信息和计算机程序的编码和解码方法，基于编码谱值的范数确定上下文子自适应值

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FIELD: information technology.;SUBSTANCE: encoder, an audio decoder, method of encoding and decoding audio information, and a computer program are proposed to obtain a frequency value based on the previously normal decoded spectral values. The audio decoder for providing decoded audio information based on the encoded audio information includes an arithmetic decoder for providing a plurality of decoded spectral values based on the arithmetic encoded spectral value representation, and a time-frequency converter for providing audio representation of a time domain using the decoded spectral values to obtain decoded audio information, the arithmetic decoder selects a mapping rule that describes the mapping of the code values for the symbol code, depending on the context state, which is described by the numerical value of the current context, determines the numerical value of the current context, depending on the set of the previously decoded spectral values.;EFFECT: reducing the encoding errors of the input audio information spectral values.;19 cl, 24 dwg
机译：领域：信息技术;技术领域：提出了编码器，音频解码器，对音频信息进行编码和解码的方法以及计算机程序，以基于先前正常解码的频谱值来获得频率值。用于基于编码的音频信息提供解码的音频信息的音频解码器包括：用于基于算术的编码频谱值表示来提供多个解码的频谱值的算术解码器;以及用于使用时域来提供时域的音频表示的时频转换器。解码频谱值以获得解码音频信息，算术解码器根据当前状态的数值描述的上下文状态，选择描述符号代码的代码值映射的映射规则，确定当前上下文的数值，取决于先前解码的频谱值的集合;效果：减少输入音频信息频谱值的编码错误; 19 cl，24 dwg

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