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1. 发明申请

WO2010040503A2 AUDIO DECODER, AUDIO ENCODER, METHOD FOR DECODING AN AUDIO SIGNAL, METHOD FOR ENCODING AN AUDIO SIGNAL, COMPUTER PROGRAM AND AUDIO SIGNAL 审中-公开
标题翻译：音频解码器，音频编码器，解码音频信号的方法，编码音频信号的方法，计算机程序和音频信号
公开(公告)号：WO2010040503A2
公开(公告)日：2010-04-15
申请号：PCT/EP2009/007169
申请日：2009-10-06
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ... , FUCHS, Guillaume , MULTRUS, Markus , GEIGER, Ralf , BORSUM, Arne , NAGEL, Frederik , ROBILLIARD, Julien , SUBBARAMAN, Vignesh , LECOMTE, Jérémie
发明人： FUCHS, Guillaume , MULTRUS, Markus , GEIGER, Ralf , BORSUM, Arne , NAGEL, Frederik , ROBILLIARD, Julien , SUBBARAMAN, Vignesh , LECOMTE, Jérémie
IPC分类号： G10L19/00 , G10L19/02
CPC分类号： G10L19/0017 , G10L19/02 , G10L19/0204 , G10L19/022 , G10L19/028 , G10L19/035 , G10L25/18
摘要： An audio decoder for providing a decoded audio information on the basis of an entropy encoded audio information comprises a context-based entropy decoder configured to decode the entropy-encoded audio information in dependence on a context, which context is based on a previously-decoded audio information in a non-reset state-of-operation. The context-based entropy decoder is configured to select a mapping information, for deriving the decoded audio information from the encoded audio information, in dependence on the context. The context-based entropy decoder comprises a context resetter configured to reset the context for selecting the mapping information to a default context, which default context is independent from the previously-decoded audio information, in response to a side information of the encoded audio information.
摘要翻译：用于基于经熵编码的音频信息提供经解码音频信息的音频解码器包括经配置以取决于上下文解码经熵编码音频信息的基于上下文的熵解码器，所述上下文基于在非重置操作状态中的先前解码的音频信息。基于上下文的熵解码器被配置为根据上下文来选择映射信息，以从编码的音频信息中导出解码的音频信息。基于上下文的熵解码器包括上下文重置器，其被配置为响应于编码的音频信息的辅助信息而重置用于选择映射信息到默认上下文的上下文，该默认上下文独立于先前解码的音频信息。

2. 发明申请

WO2010086342A1 AUDIO ENCODER, AUDIO DECODER, METHOD FOR ENCODING AN INPUT AUDIO INFORMATION, METHOD FOR DECODING AN INPUT AUDIO INFORMATION AND COMPUTER PROGRAM USING IMPROVED CODING TABLES 审中-公开
标题翻译：音频编码器，音频解码器，编码输入音频信息的方法，使用改进的编码表解码输入音频信息和计算机程序的方法
公开(公告)号：WO2010086342A1
公开(公告)日：2010-08-05
申请号：PCT/EP2010/050954
申请日：2010-01-27
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , LECOMTE, Jeremie , NAGEL, Frederik , ROBILLARD, Julien , GEIGER, Ralf , BORSUM, Arne , FUCHS, Guillaume , MULTRUS, Markus
发明人： LECOMTE, Jeremie , NAGEL, Frederik , ROBILLARD, Julien , GEIGER, Ralf , BORSUM, Arne , FUCHS, Guillaume , MULTRUS, Markus
IPC分类号： G10L19/00
CPC分类号： G10L19/0017
摘要： An audio decoder comprises an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically-encoded representation of the spectral values and a frequency-domain to time-domain converter for providing a time-domain audio representation using the decoded spectral values, in order to obtain a decoded audio information. The arithmetic decoder is configured to derive a group index from a variable-length-codeword representing the group index in dependence on a state index. The arithmetic decoder is configured to derive the values of a most-significant bit-plane of a tuple of spectral values using the group index and an element index, and to provide a tuple of decoded spectral values using the values of the most-significant bit-plane of the tuple of spectral values. The arithmetic decoder is configured to select a cumulative-frequencies-table out of a set of 32 cumulative-frequencies-tables in dependence on the state index, and to apply the selected cumulative-frequencies-table to derive the group index from the variable-length codeword representing the group index.
摘要翻译：音频解码器包括算术解码器，用于基于频谱值的算术编码表示来提供多个解码频谱值，以及频域到时域转换器，用于使用解码频谱提供时域音频表示值，以便获得解码的音频信息。算术解码器被配置为根据状态索引从表示组索引的可变长度码字导出组索引。算术解码器被配置为使用组索引和元素索引来导出频谱值的元组的最高有效位平面的值，并且使用最高有效位的值来提供解码频谱值的元组光谱值的元组的平面。算术解码器被配置为根据状态索引从32个累积频率表的集合中选择累积频率表，并且应用所选择的累积频率表以从可变频率表中导出组索引，代表组索引的长度代码字。

3. 发明申请

WO2010003532A1 APPARATUS AND METHOD FOR ENCODING/DECODING AN AUDIO SIGNAL USING AN ALIASING SWITCH SCHEME 审中-公开
标题翻译：使用切换方案编码/解码音频信号的装置和方法
公开(公告)号：WO2010003532A1
公开(公告)日：2010-01-14
申请号：PCT/EP2009/004374
申请日：2009-06-17
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FUCHS, Guillaume , LECOMTE, Jérémie , BAYER, Stefan , GEIGER, Ralf , MULTRUS, Markus , SCHULLER, Gerald , HIRSCHFELD, Jens
发明人： FUCHS, Guillaume , LECOMTE, Jérémie , BAYER, Stefan , GEIGER, Ralf , MULTRUS, Markus , SCHULLER, Gerald , HIRSCHFELD, Jens
IPC分类号： G10L19/02 , G10L19/04 , G10L19/14
CPC分类号： G10L19/20 , G10L19/02 , G10L19/022 , G10L19/04
摘要： An apparatus for encoding an audio signal comprises the windower (11) for windowing a first block of the audio signal using an analysis window having an aliasing portion and a further portion. The apparatus furthermore comprises a processor (12) for processing the first sub-block of the audio signal associated with the aliasing portion by transforming the sub-block from a domain into a different domain subsequent to windowing the first sub-block to obtain the processed first sub-block, and for processing a second sub-block of the audio signal associated with the further portion by transforming the second sub-block from the domain into the different domain before windowing the second sub-block to obtain a processed second sub-block. The apparatus furthermore comprises a transformer (13) for converting the processed first sub-block and the processed second sub-block from the different domain into a further different domain using the same block transform rule to obtain a converted first block which may then be compressed using any of the well-known data compression algorithms. Thus, a critically sampled switch between two coding modes can be obtained, since aliasing portions occurring in two different domains are matched to each other.
摘要翻译：用于编码音频信号的装置包括用于使用具有混叠部分和另一部分的分析窗口对音频信号的第一块进行加窗的加窗器（11）。所述装置还包括处理器（12），用于通过将所述子块从一个域变换成不同的域来处理与所述混叠部分相关联的所述音频信号的所述第一子块，所述第一子块在所述第一子块的加窗之后获得所述处理并且用于通过在开启第二子块之前将第二子块从该域变换为不同的域来处理与另一部分相关联的音频信号的第二子块，以获得处理的第二子块，块。该装置还包括用于使用相同的块变换规则将处理的第一子块和处理的第二子块从不同域转换成另一不同域的变压器（13），以获得可以被压缩的转换后的第一块使用任何众所周知的数据压缩算法。因此，由于发生在两个不同域中的混叠部分彼此匹配，所以可以获得两种编码模式之间的批量采样切换。

4. 发明申请

WO2010003617A1 LOW BITRATE AUDIO ENCODING/DECODING SCHEME WITH COMMON PREPROCESSING 审中-公开
标题翻译：低分辨率音频编码/解码方案与通用预处理
公开(公告)号：WO2010003617A1
公开(公告)日：2010-01-14
申请号：PCT/EP2009/004873
申请日：2009-07-06
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , GRILL, Bernhard , BAYER, Stefan , FUCHS, Guillaume , GEYERSBERGER, Stefan , GEIGER, Ralf , HILPERT, Johannes , KRAEMER, Ulrich , LECOMTE, Jeremie , MULTRUS, Markus , NEUENDORF, Max , POPP, Harald , RETTELBACH, Nikolaus , NAGEL, Frederik , DISCH, Sascha , HERRE, Juergen , YOKOTANI, Yoshikazu , WABNIK, Stefan , SCHULLER, Gerald , HIRSCHFELD, Jens
发明人： GRILL, Bernhard , BAYER, Stefan , FUCHS, Guillaume , GEYERSBERGER, Stefan , GEIGER, Ralf , HILPERT, Johannes , KRAEMER, Ulrich , LECOMTE, Jeremie , MULTRUS, Markus , NEUENDORF, Max , POPP, Harald , RETTELBACH, Nikolaus , NAGEL, Frederik , DISCH, Sascha , HERRE, Juergen , YOKOTANI, Yoshikazu , WABNIK, Stefan , SCHULLER, Gerald , HIRSCHFELD, Jens
IPC分类号： G10L19/14
CPC分类号： G10L19/173 , G10L19/0017 , G10L19/008 , G10L19/0212 , G10L19/18 , G10L2019/0008
摘要： An audio encoder comprises a common preprocessing stage (100), an information sink based encoding branch (400) such as spectral domain encoding branch, a information source based encoding branch (500) such as an LPC-domain encoding branch and a switch (200) for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage (300). An audio decoder comprises a spectral domain decoding branch, an LPC- domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.
摘要翻译：音频编码器包括公共预处理级（100），诸如频域编码分支的基于信息集合的编码分支（400），诸如LPC域编码分支的信息源编码分支（500）和开关（200 ），用于在由决策阶段（300）控制的这些分支的这些分支或输出的输入处在这些分支之间切换。音频解码器包括频域解码分支，LPC域解码分支，用于在分支之间切换的一个或多个开关和用于后处理时域音频信号以用于获得后处理音频的公共后处理级信号。

5. 发明申请

WO2012110415A1 APPARATUS AND METHOD FOR PROCESSING A DECODED AUDIO SIGNAL IN A SPECTRAL DOMAIN 审中-公开
标题翻译：在频域中处理解码音频信号的装置和方法
公开(公告)号：WO2012110415A1
公开(公告)日：2012-08-23
申请号：PCT/EP2012/052292
申请日：2012-02-10
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FUCHS, Guillaume , GEIGER, Ralf , SCHNELL, Markus , RAVELLI, Emmanuel , DOEHLA, Stefan
发明人： FUCHS, Guillaume , GEIGER, Ralf , SCHNELL, Markus , RAVELLI, Emmanuel , DOEHLA, Stefan
IPC分类号： G10L19/14
CPC分类号： G10L19/00 , G10K11/16 , G10L19/005 , G10L19/012 , G10L19/0212 , G10L19/025 , G10L19/03 , G10L19/04 , G10L19/107 , G10L19/12 , G10L19/22 , G10L19/26 , G10L21/0216 , G10L25/06 , G10L25/78
摘要： An apparatus for processing a decoded audio signal (100) comprising a filter (102) for filtering the decoded audio signal to obtain a filtered audio signal (104), a time-spectral converter stage (106) for converting the decoded audio signal and the filtered audio signal into corresponding spectral representations, each spectral representation having a plurality of subband signals, a weighter (108) for performing a frequency selective weighting of the filtered audio signal by a multiplying subband signals by respective weighting coefficients to obtain a weighted filtered audio signal, a subtracter (112) for performing a subband-wise subtraction between the weighted filtered audio signal and the spectral representation of the decoded audio signal, and a spectral-time converter (114) for converting the result audio signal or a signal derived from the result audio signal into a time domain representation to obtain a processed decoded audio signal (116).
摘要翻译：一种用于处理解码音频信号（100）的装置，包括用于对解码的音频信号进行滤波以获得经滤波的音频信号（104）的滤波器（102），用于转换解码的音频信号的时间频谱转换器级（106）滤波后的音频信号转换成相应的频谱表示，每个频谱表示具有多个子带信号，一个重力器（108），用于通过乘法子带信号通过相应的加权系数执行滤波后的音频信号的频率选择性加权，以获得加权滤波音频信号，用于在加权的滤波音频信号和解码的音频信号的频谱表示之间执行子带方式减法的减法器（112），以及用于转换结果音频信号的频谱 - 时间转换器（114）将结果音频信号转换成时域表示以获得经处理的解码音频信号（116）。

6. 发明申请

WO2010086373A2 AUDIO ENCODER, AUDIO DECODER, ENCODED AUDIO INFORMATION, METHODS FOR ENCODING AND DECODING AN AUDIO SIGNAL AND COMPUTER PROGRAM 审中-公开
标题翻译：音频编码器，音频解码器，编码音频信息，编码和解码音频信号和计算机程序的方法
公开(公告)号：WO2010086373A2
公开(公告)日：2010-08-05
申请号：PCT/EP2010/050998
申请日：2010-01-28
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , GEIGER, Ralf , LECOMTE, Jérémie , MULTRUS, Markus , NEUENDORF, Max , SPITZNER, Christian
发明人： GEIGER, Ralf , LECOMTE, Jérémie , MULTRUS, Markus , NEUENDORF, Max , SPITZNER, Christian
IPC分类号： G10L19/02
CPC分类号： G10L19/167 , G10L19/0017 , G10L19/022 , G10L19/24
摘要： An audio decoder for providing a decoded audio information on the basis of an encoded audio information comprises a window-based signal transformer configured to map a time-frequency representation, which is described by the encoded audio information, to a time-domain representation. The window-based signal transformer is configured to select a window, out of a plurality of windows comprising windows of different transition slopes and windows of different transform length, on the basis of a window information. The audio decoder comprises a window selector configured to evaluate a variable-codewordlength window information in order to select a window for a processing of a given portion of the time-frequency representation associated with a given frame of the audio information.
摘要翻译：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：基于窗口的信号变换器，被配置为将由编码的音频信息描述的时间频率表示映射到时域表示。基于窗口的信号变换器被配置为基于窗口信息来选择包括不同转换斜率的窗口的多个窗口和不同变换长度的窗口中的窗口。音频解码器包括窗口选择器，其被配置为评估可变码字长度窗口信息，以便选择用于处理与音频信息的给定帧相关联的时间 - 频率表示的给定部分的窗口。

7. 发明申请

WO2011048118A1 AUDIO SIGNAL ENCODER, AUDIO SIGNAL DECODER, METHOD FOR PROVIDING AN ENCODED REPRESENTATION OF AN AUDIO CONTENT, METHOD FOR PROVIDING A DECODED REPRESENTATION OF AN AUDIO CONTENT AND COMPUTER PROGRAM FOR USE IN LOW DELAY APPLICATIONS 审中-公开
标题翻译：音频信号编码器，音频信号解码器，用于提供音频内容的编码表示的方法，用于提供音频内容的解码表示的方法和用于低延迟应用的计算机程序
公开(公告)号：WO2011048118A1
公开(公告)日：2011-04-28
申请号：PCT/EP2010/065753
申请日：2010-10-19
申请人： FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , GEIGER, Ralf , SCHNELL, Markus , LECOMTE, Jérémie , SCHMIDT, Konstantin , FUCHS, Guillaume , RETTELBACH, Nikolaus
发明人： GEIGER, Ralf , SCHNELL, Markus , LECOMTE, Jérémie , SCHMIDT, Konstantin , FUCHS, Guillaume , RETTELBACH, Nikolaus
IPC分类号： G10L19/02 , G10L19/04 , G10L19/14
CPC分类号： G10L19/0212 , G10L19/022 , G10L19/20
摘要： An audio signal encoder (100) comprises a transform-domain path (12) configured to obtain a set of spectral coefficients (124) and noise-shaping information (126) on the basis of a time-domain representation (122) of a portion of the audio content to be encoded in a transform-domain mode. The transform-domain path comprises a time-domain-to-frequency-domain converter (130) configured to window a time-domain representation of the audio content, or a pre-processed version thereof, to obtain a windowed representation of the audio content, and to apply a time-domain-to-frequency-domain conversion, to derive a set of spectral coefficients from the windowed time-domain representation of the audio content. The audio signal decoder comprises a CELP path (140) configured to obtain an code-excitation information (144) and a linear-prediction-domain parameter information (146) on the basis of a portion of the audio content to be encoded in a CELP mode. The time-domain-to-frequency-domain converter (136) is configured to apply a predetermined asymmetric analysis window (520) for a windowing of a current portion of the audio content to be encoded in the transform-domain mode and following a portion of the audio content encoded in the transform-domain mode both if the current portion of the audio content is followed by a subsequent portion of the audio content to be encoded in the transform-domain mode and if the current portion of the audio content is followed by a subsequent portion of the audio content to be encoded in the CELP mode. The audio signal encoder is configured to selectively provide an aliasing cancellation information (164) if the current portion of the audio content is followed by a subsequent portion of the audio content to be encoded in the CELP mode.
摘要翻译：音频信号编码器（100）包括变换域路径（12），其经配置以基于部分的时域表示（122）获得一组频谱系数（124）和噪声整形信息（126）要以变换域模式编码的音频内容。变换域路径包括被配置为对音频内容的时域表示或其预处理版本进行窗口化的时域 - 频域转换器（130），以获得音频内容的窗口化表示并且应用时域到频域转换，从音频内容的加窗时域表示中导出一组频谱系数。音频信号解码器包括CELP路径（140），其被配置为基于要在CELP中编码的音频内容的一部分来获得码激励信息（144）和线性预测域参数信息（146）模式。时域 - 频域转换器（136）被配置为对预定的非对称分析窗口（520）应用于在变换域模式中对要编码的音频内容的当前部分的加窗，并且遵循一部分如果音频内容的当前部分后面是要以变换域模式编码的音频内容的后续部分，并且如果跟随音频内容的当前部分，则以变换域模式编码的音频内容通过CELP模式中要编码的音频内容的后续部分。音频信号编码器被配置为如果音频内容的当前部分跟随着要以CELP模式编码的音频内容的后续部分，则选择性地提供混叠消除信息（164）。

8. 发明申请

WO2011147950A1 LOW-DELAY UNIFIED SPEECH AND AUDIO CODEC 审中-公开
标题翻译：低延迟语音和音频编解码器
公开(公告)号：WO2011147950A1
公开(公告)日：2011-12-01
申请号：PCT/EP2011/058701
申请日：2011-05-27
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , GEIGER, Ralf , SCHNELL, Markus , FUCHS, Guillaume , RAVELLI, Emmanuel , BÄCKSTRÖM, Tom , LECOMTE, Jérémie , SCHMIDT, Konstantin , RETTELBACH, Nikolaus , LUTZKY, Manfred , GRILL, Bernhard
发明人： GEIGER, Ralf , SCHNELL, Markus , FUCHS, Guillaume , RAVELLI, Emmanuel , BÄCKSTRÖM, Tom , LECOMTE, Jérémie , SCHMIDT, Konstantin , RETTELBACH, Nikolaus , LUTZKY, Manfred , GRILL, Bernhard
IPC分类号： G10L19/14
CPC分类号： G10L19/20
摘要： A unified speech and audio decoder is described, which comprises a frame buffer configured to buffer a sub-part of a datastream composed of consecutive frames in units of the frames so that the subpart continuously comprises at least one frame, each frame representing a coded version of a respective portion of consecutive portions of an audio signal, and each frame comprising a mode identifier assigning the respective frame to a respective one of a plurality of coding modes comprising a CELP (codebook excitation linear prediction) coding mode and a transform coded excitation linear prediction coding mode. Further, the unified speech and audio decoder comprises a CELP decoder configured to decode the frames to which the CELP coding mode is assigned to reconstruct the respective portions, and a transform coded excitation linear prediction decoder configured to decode the frames to which the transform coded excitation linear prediction coding mode is assigned, to reconstruct the respective portions, wherein the frame buffer is configured to distribute the frames buffered to the CELP decoder and the transform coded excitation linear prediction decoder under removal of the respective frames from the frame buffer, frame-wise.
摘要翻译：描述了一种统一的语音和音频解码器，其包括帧缓冲器，其被配置为以帧为单位缓冲由连续帧组成的数据流的子部分，使得该子部分连续地包括至少一个帧，每个帧表示编码版本音频信号的连续部分的相应部分，并且每个帧包括将各个帧分配给包括CELP（码本激励线性预测）编码模式和变换编码激励线性的多个编码模式中的相应一个的模式标识符预测编码模式。此外，统一语音和音频解码器包括：CELP解码器，被配置为对分配有CELP编码模式的帧进行解码以重构各个部分;以及变换编码激励线性预测解码器，被配置为对转换编码激励分配线性预测编码模式，以重建各个部分，其中帧缓冲器被配置为在从帧缓冲器移除相应帧的情况下，将缓冲到CELP解码器和变换编码激励线性预测解码器的帧分配。

9. 发明申请

WO2011048094A1 MULTI-MODE AUDIO CODEC AND CELP CODING ADAPTED THEREFORE 审中-公开
标题翻译：多模式音频编解码器和CELP编码适配器
公开(公告)号：WO2011048094A1
公开(公告)日：2011-04-28
申请号：PCT/EP2010/065718
申请日：2010-10-19
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , GEIGER, Ralf , FUCHS, Guillaume , MULTRUS, Markus , GRILL, Bernhard
发明人： GEIGER, Ralf , FUCHS, Guillaume , MULTRUS, Markus , GRILL, Bernhard
IPC分类号： G10L19/14 , G10L19/08
CPC分类号： G10L19/12 , G10L19/03 , G10L19/04 , G10L19/083 , G10L19/20 , G10L2019/0002
摘要： In accordance with a first aspect of the present invention, bitstream elements of sub-frames are encoded differentially to a global gain value so that a change of the global gain value of the frames results in an adjustment of an output level of the decoded representation of the audio content. Concurrently, the differential coding saves bits otherwise occurring when introducing a new syntax element into an encoded bitstream. Even further, the differential coding enables the lowering of the burden of globally adjusting the gain of an encoded bitstream by allowing the time resolution in setting the global gain value to be lower than the time resolution at which the afore-mentioned bitstream element differentially encoded to the global gain value adjusts the gain of the respective sub-frame. In accordance with another aspect, a global gain control across CELP coded frames and transform coded frames is achieved by co-controlling the gain of the codebook excitation of the CELP codec, along with a level of the transform or inverse transform of the transform coded frames. According to even another aspect, a variation of the loudness of a CELP coded bitstream upon changing the respective gain value is rendered more well adapted to the behavior of transform coded level adjustments, by performing the gain value determination in CELP coding in the weighted domain of the excitation signal.
摘要翻译：根据本发明的第一方面，子帧的比特流元素被差分地编码为全局增益值，使得帧的全局增益值的改变导致对解码表示的输出电平的调整音频内容。同时，差分编码保存在将新的语法元素引入到编码比特流中时所发生的位。此外，差分编码能够通过在将全局增益值设定为低于上述比特流元素差分编码的时间分辨率的同时允许时间分辨率来降低全局调整编码比特流的增益的负担全局增益值调整相应子帧的增益。根据另一方面，跨CELP编码帧和变换编码帧的全局增益控制通过共同控制CELP编解码器的码本激励的增益以及变换编码帧的变换或逆变换的级别来实现。根据另一方面，通过在加权域中的CELP编码中执行增益值确定，在改变相应增益值时，CELP编码比特流的响度的变化被更好地适应于变换编码电平调整的行为激励信号。

10. 发明申请

WO2010003564A1 LOW BITRATE AUDIO ENCODING/DECODING SCHEME HAVING CASCADED SWITCHES 审中-公开
标题翻译：低成本音频编码/解码方案具有CASCADED开关
公开(公告)号：WO2010003564A1
公开(公告)日：2010-01-14
申请号：PCT/EP2009/004652
申请日：2009-06-26
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V , VOICEAGE CORPORATION , GRILL, Bernhard , LEFEBVRE, Roch , BESSETTE, Bruno , LAPIERRE, Jimmy , GOURNAY, Philippe , SALAMI, Redwan , BAYER, Stefan , FUCHS, Guillaume , GEYERSBERGER, Stefan , GEIGER, Ralf , HILPERT, Johannes , KRAEMER, Ulrich , LECOMTE, Jeremie , MULTRUS, Markus , NEUENDORF, Max , POPP, Harald , RETTELBACH, Nikolaus
发明人： GRILL, Bernhard , LEFEBVRE, Roch , BESSETTE, Bruno , LAPIERRE, Jimmy , GOURNAY, Philippe , SALAMI, Redwan , BAYER, Stefan , FUCHS, Guillaume , GEYERSBERGER, Stefan , GEIGER, Ralf , HILPERT, Johannes , KRAEMER, Ulrich , LECOMTE, Jeremie , MULTRUS, Markus , NEUENDORF, Max , POPP, Harald , RETTELBACH, Nikolaus
IPC分类号： G10L19/14
CPC分类号： G10L19/008 , G10L19/0017 , G10L19/0212 , G10L19/173 , G10L19/18 , G10L2019/0008
摘要： An audio encoder comprises a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoding branch such as an LPC-domain encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch comprises a converter into a specific domain different from the spectral domain such as an LPC analysis stage generating an excitation signal, and wherein the second encoding branch furthermore comprises a specific domain coding branch such as LPC domain processing branch, and a specific spectral domain coding branch such as LPC spectral domain processing branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder comprises a first domain decoder such as a spectral domain decoding branch, a second domain decoder such as an LPC domain decoding branch for decoding a signal such as an excitation signal in the second domain, and a third domain decoder such as an LPC-spectral decoder branch and two cascaded switches for switching between the decoders.
摘要翻译：音频编码器包括第一信息宿定向编码分支，诸如频域编码分支，第二信息源或SNR定向编码分支，诸如LPC域编码分支，以及用于在第一编码分支与第二编码分支之间进行切换的开关编码分支，其中所述第二编码分支包括转换器到不同于所述频域的特定域，例如产生激励信号的LPC分析阶段，并且其中所述第二编码分支还包括特定域编码分支，诸如LPC域处理分支，以及诸如LPC频域处理分支的特定频域编码分支，以及用于在特定编码分支和特定频域编码分支之间切换的附加开关。音频解码器包括诸如频域解码分支的第一域解码器，诸如LPC域解码分支的第二域解码器，用于对诸如第二域中的激励信号的信号进行解码，以及第三域解码器，诸如LPC 光谱解码器分支和两个级联开关，用于在解码器之间切换。

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