首页> 外国专利> AUDIO ENCODER, AUDIO DECODER, METHOD FOR ENCODING AND DECODING AN AUDIO INFORMATION, AND COMPUTER PROGRAM OBTAINING A CONTEXT SUB-REGION VALUE ON THE BASIS OF A NORM OF PREVIOUSLY DECODED SPECTRAL VALUES

AUDIO ENCODER, AUDIO DECODER, METHOD FOR ENCODING AND DECODING AN AUDIO INFORMATION, AND COMPUTER PROGRAM OBTAINING A CONTEXT SUB-REGION VALUE ON THE BASIS OF A NORM OF PREVIOUSLY DECODED SPECTRAL VALUES

机译：音频编码器，音频解码器，用于对音频信息进行编码和解码的方法，以及基于先前已编码的谱值的范数获得上下文子区域值的计算机程序

页面导航

摘要
著录项
相似文献

摘要

AN AUDIO DECODER (200;800) FOR PROVIDING A DECODED AUDIO INFORMATION (212;812) ON THE BASIS OF AN ENCODED AUDIO INFORMATION (210;810) COMPRISES AN ARITHMETIC DECODER (230;820) FOR PROVIDING A PLURALITY OF DECODED SPECTRAL VALUES (232;822) ON THE BASIS OF AN ARITHMETICALLY-ENCODED REPRESENTATION (222,821) OF THE SPECTRAL VALUES AND A FREQUENCY-DOMAIN-TO-TIME-DOMAIN CONVERTER (260;830) FOR PROVIDING A TIME-DOMAIN AUDIO REPRESENTATION (262;812) USING THE DECODED SPECTRAL VALUES (232;822), IN ORDER TO OBTAIN THE DECODED AUDIO INFORMATION (212;812). THE ARITHMETIC DECODER (230;820) IS CONFIGURED TO SELECT A MAPPING RULE (297;CUM_FRE []) DESCRIBING A MAPPING OF A CODE (ACOD_M, VALUE) ONTO A SYMBOL CODE (SYMBOL) IN DEPENDENCE ON A CONTEXT STATE DESCRIBED BY A NUMERIC CURRENT CONTEXT VALUE (C). THE ARITHMETIC DECODER(230;820) IS CONFIGURED TO DETERMINE THE NUMERIC CURRENT CONTEXT VALUE (C) IN DEPENDENCE ON A PLURALITY OF PREVIOUSLY DECODED SPECTRAL VALUES. THE ARITHMETIC DECODER IS CONFIGURED TO OBTAIN A PLURALITY OF CONTEXT SUBREGION VALUES (Q[O[I-1], Q[0][I],Q[0][I+1], Q[1]I-1]) ON THE BASIS OF PREVIOUSLY DECODED SPECTRAL VALUES AND TO STORE SAID CONTEXT SUBREGION VALUES. THE ARITHMETIC DECODER IS CONFIGURED TO DERIVE A NUMERIC CURRENT CONTEXT VALUE (C) ASSOCIATED WITH ONE OR MORE SPECTRAL VALUES TO BE DECODED IN DEPENDENCE ON THE STORED CONTEXT SUBREGION VALUES (Q[O[I-1], Q[0][I],Q[0][I+1], Q[1]I-1]). THE ARITHMETIC DECODER IS CONFIGURED TO COMPUTE THE NORM OF A VECTOR FORMED BY A PLURALITY OF PREVIOUSLY DECODED SPECTRAL VALUES (A,B) IN ORDER TO OBTAIN A COMMON CONTEXT SUBREGION VALUE (Q[1][I]) ASSOCIATED WITH THE PLURALITY OF PREVIOUSLY DECODED SPECTRAL VALUES. AN AUDIO ENCODER USES A SIMILAR CONCEPT. (FIGURE 12)

机译：用于基于已编码的音频信息（210; 810）提供已解码的音频信息（212; 812）的音频解码器（200; 800）包括用于提供多个已频谱频谱值的算术解码器（230; 820）（ 232; 822）基于频谱值的算术编码表示（222,821）和用于提供时域音频表示的频率域到时域转换器（260; 830）。为了获得解码后的音频信息（212; 812），请使用解码后的频谱值（232; 822）。配置了算术解码器（230; 820）来选择映射规则（297; CUM_FRE []），以便将代码（ACOD_M，值）映射到符号代码（SYMBOL）上，这取决于由数字描述的上下文状态当前上下文值（C）。算术解码器（230; 820）配置为确定数字当前上下文值（C），具体取决于多个先前解码的谱值。算术解码器配置为获得上下文子区域值的多个（Q [O [I-1]，Q [0] [I]，Q [0] [I + 1]，Q [1] I-1]）基于预先解码的谱值并存储所述上下文子区域值。算术解码器配置为推导与要根据存储的上下文子区域值（Q [O [I-1]，Q [0] [I]）相关的一个或多个频谱值解码的数字当前上下文值（C），Q [0] [I + 1]，Q [1] I-1]。算术解码器配置为计算由多个预先解码的谱值（A，B）构成的矢量的范数，以便获得与多个上下文相关的通用上下文子值（Q [1] [I]）解码后的光谱值。音频编码器使用类似的概念。（图12）

著录项

公开/公告号MY159982A

专利类型
公开/公告日2017-02-15

原文格式PDF
申请/专利权人 FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.;
展开▼

申请/专利号MY2012PI03149
发明设计人 FUCHS GUILLAUME;MULTRUSMARKUS;RETTELBACHNIKOLAUS;SUBBARAMANVIGNESH;WEISSOLIVER;GAYERMARC;WARMBOLDPATRICK;GRIEBELCHRISTIAN;
展开▼

申请日2011-01-11
分类号G10L19;G10L19/02;
国家 MY
入库时间 2022-08-21 13:36:13

相似文献

专利
外文文献
中文文献