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1.发明授权Method and apparatus for frame classification and rate determination in voice transcoders for telecommunications 失效用于电信的语音转码器中的帧分类和速率确定的方法和装置公开(公告)号：US07469209B2
公开(公告)日：2008-12-23
申请号：US10642422
申请日：2003-08-14
CPC分类号： G10L19/173 , G10L19/10
摘要： A method and apparatus for frame classification and rate determination in voice transcoders. The apparatus includes a classifier input parameter preparation module that unpacks the bitstream from the source codec and selects the codec parameters to be used for classification, parameter buffers that store previous input and output parameters of previous frames, and a frame classification and rate decision module that uses the source codec parameters from the current frame and zero or more frames to determine the frame class, rate, and classification feature parameters for the destination codec. The classifier input parameter preparation module separates the bitstream code and unquantizes the sub-codes into the codec parameters. The frame classification and rate decision module comprises M sub-classifiers and a final decision module. The characteristics of the sub-classifiers are obtained by a classifier construction module, which comprises a training set generation module, a learning module and an evaluation module.
摘要翻译： 一种用于语音转码器中帧分类和速率确定的方法和装置。 该装置包括：分类器输入参数准备模块，用于从源编解码器解码比特流并选择要用于分类的编解码器参数，存储先前帧的先前输入和输出参数的参数缓冲器;以及帧分类和速率决定模块， 使用来自当前帧的源编解码器参数和零个或多个帧来确定目标编解码器的帧类，速率和分类特征参数。 分类器输入参数准备模块分离比特流代码，并将子代码未量化为编解码器参数。 帧分类和速率决定模块包括M个子分类器和一个最终决策模块。 分类器的特征由分类器构造模块获得，分类器构造模块包括训练集生成模块，学习模块和评估模块。
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公开(公告)号：US20080195384A1
公开(公告)日：2008-08-14
申请号：US11890283
申请日：2007-08-02
IPC分类号： G10L19/12
CPC分类号： G10L19/173
摘要： A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution. The method includes pre-computing weighting factors for a perceptual weighting filter optimized to a specific source and destination codec pair, pre-configuring the transcoding strategies, mapping CELP parameters in the CELP parameter space according to the selected coding strategy, performing Linear Prediction analysis if specified by the transcoding strategy, perceptually weighting the speech using with tuned weighting factors, and searching for adaptive codebook and fixed-codebook parameters to obtain a quantized set of destination codec parameters.
摘要翻译： 一种用于语音代码转换器的方法和装置，其使用使用调谐加权因子的感知加权，将代表根据第一语音压缩标准编码的数据的比特流转换为表示数据帧的比特流，使得 第二语音压缩标准的比特流，以产生比可比较的串联转码解决方案更高质量的解码语音信号。 该方法包括预先计算针对特定源和目标编解码器对优化的感知加权滤波器的加权因子，预配置转码策略，根据所选择的编码策略映射CELP参数空间中的CELP参数，执行线性预测分析，如果 由转码策略指定，用调谐的加权因子感知加权语音，并搜索自适应码本和固定码本参数以获得量化的目的地编解码器参数集合。
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公开(公告)号：US07962333B2
公开(公告)日：2011-06-14
申请号：US11890283
申请日：2007-08-02
IPC分类号： G10L19/12
CPC分类号： G10L19/173
摘要： A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution. The method includes pre-computing weighting factors for a perceptual weighting filter optimized to a specific source and destination codec pair, pre-configuring the transcoding strategies, mapping CELP parameters in the CELP parameter space according to the selected coding strategy, performing Linear Prediction analysis if specified by the transcoding strategy, perceptually weighting the speech using with tuned weighting factors, and searching for adaptive codebook and fixed-codebook parameters to obtain a quantized set of destination codec parameters.
摘要翻译： 一种用于语音代码转换器的方法和装置，其使用使用调谐加权因子的感知加权，将代表根据第一语音压缩标准编码的数据的比特流转换为表示数据帧的比特流，使得 第二语音压缩标准的比特流，以产生比可比较的串联转码解决方案更高质量的解码语音信号。 该方法包括预先计算针对特定源和目标编解码器对优化的感知加权滤波器的加权因子，预配置转码策略，根据所选择的编码策略映射CELP参数空间中的CELP参数，执行线性预测分析，如果 由转码策略指定，用调谐的加权因子感知加权语音，并搜索自适应码本和固定码本参数以获得量化的目的地编解码器参数集合。
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公开(公告)号：US07363218B2
公开(公告)日：2008-04-22
申请号：US10693620
申请日：2003-10-23
IPC分类号： G10L19/10
CPC分类号： G10L19/173
摘要： An apparatus and method for mapping CELP parameters between a source codec and a destination codec. The apparatus includes an LSP mapping module, an adaptive codebook mapping module coupled to the LSP mapping module, and a fixed codebook mapping module coupled to the LSP mapping module and the adaptive codebook mapping module. The LSP mapping module includes an LP overflow module and an LSP parameter modification module. The adaptive codebook mapping module includes a first pitch gain codebook. The fixed codebook mapping module includes a first target processing module, a pulse search module, a fixed codebook gain estimation module, a pulse position searching module.
摘要翻译： 用于在源编解码器和目标编解码器之间映射CELP参数的装置和方法。 该装置包括LSP映射模块，耦合到LSP映射模块的自适应码本映射模块以及耦合到LSP映射模块和自适应码本映射模块的固定码本映射模块。 LSP映射模块包括一个LP溢出模块和一个LSP参数修改模块。 自适应码本映射模块包括第一音调增益码本。 固定码本映射模块包括第一目标处理模块，脉冲搜索模块，固定码本增益估计模块，脉冲位置搜索模块。
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公开(公告)号：US08150685B2
公开(公告)日：2012-04-03
申请号：US13097300
申请日：2011-04-29
IPC分类号： G10L19/12
CPC分类号： G10L19/173
摘要： A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution. The method includes pre-computing weighting factors for a perceptual weighting filter optimized to a specific source and destination codec pair, pre-configuring the transcoding strategies, mapping CELP parameters in the CELP parameter space according to the selected coding strategy, performing Linear Prediction analysis if specified by the transcoding strategy, perceptually weighting the speech using with tuned weighting factors, and searching for adaptive codebook and fixed-codebook parameters to obtain a quantized set of destination codec parameters.
摘要翻译： 一种用于语音代码转换器的方法和装置，其使用使用调谐加权因子的感知加权，将代表根据第一语音压缩标准编码的数据的比特流转换为表示数据帧的比特流，使得 第二语音压缩标准的比特流，以产生比可比较的串联转码解决方案更高质量的解码语音信号。 该方法包括预先计算针对特定源和目标编解码器对优化的感知加权滤波器的加权因子，预配置转码策略，根据所选择的编码策略映射CELP参数空间中的CELP参数，执行线性预测分析，如果 由转码策略指定，用调谐的加权因子感知加权语音，并搜索自适应码本和固定码本参数以获得量化的目的地编解码器参数集合。
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公开(公告)号：US07848922B1
公开(公告)日：2010-12-07
申请号：US11890263
申请日：2007-08-02
IPC分类号： G10L19/04
CPC分类号： G10L19/16
摘要： An apparatus and method for encoding and decoding a voice signal. The apparatus includes an encoder configured to generate an output bitstream signal from an input voice signal. The output bitstream signal is associated with at least a first standard of a first plurality of CELP voice compression standards. Additionally, the apparatus includes a decoder configured to generate an output voice signal from an input bitstream signal. The input bitstream signal is associated with at least a first standard of a second plurality of CELP voice compression standards. The CELP encoder includes a plurality of codec-specific encoder modules. Additionally, the CELP encoder includes a plurality of generic encoder modules. The CELP decoder includes a plurality of codec-specific decoder modules. Additionally, the CELP decoder includes a plurality of generic decoder modules.
摘要翻译： 一种用于对语音信号进行编码和解码的装置和方法。 该装置包括：编码器，被配置为从输入语音信号生成输出比特流信号。 输出比特流信号与第一多个CELP语音压缩标准的至少第一标准相关联。 另外，该装置包括被配置为从输入比特流信号产生输出语音信号的解码器。 输入比特流信号与第二多个CELP语音压缩标准的至少第一标准相关联。 CELP编码器包括多个编解码器专用编码器模块。 此外，CELP编码器包括多个通用编码器模块。 CELP解码器包括多个编解码器专用解码器模块。 此外，CELP解码器包括多个通用解码器模块。
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7.发明授权公开(公告)号：US07433815B2
公开(公告)日：2008-10-07
申请号：US10660468
申请日：2003-09-10
CPC分类号： G10L19/173 , G10L19/12 , G10L19/24
摘要： A variable-rate voice transcoder that transcodes a bitstream representing frames of data encoded according to a first compression standard to a bitstream representing frames of data according to a second compression standard; the second compression standard defines a variable-rate voice codec. The method includes unquantizing a bitstream into a first set of parameters compatible with the first compression standard. The first set of parameters in addition to external control commands are then used to determine a frame class and a rate for the second compression standard. Next, the first set of parameters are transformed into a second set of parameters compatible with the second compression standard according to the frame-classification and rate determination decision. Lastly, the second set of parameters is packed into a bitstream compatible with the second compression standard.
摘要翻译： 一种可变速率语音转码器，其将表示根据第一压缩标准编码的数据的比特流代码成表示根据第二压缩标准的数据帧; 第二压缩标准定义了可变速率语音编解码器。 该方法包括将比特流非量化到与第一压缩标准兼容的第一组参数中。 然后除了外部控制命令之外，第一组参数用于确定第二个压缩标准的帧类和速率。 接下来，根据帧分类和速率确定决定，第一组参数被变换成与第二压缩标准兼容的第二组参数。 最后，将第二组参数打包成与第二压缩标准兼容的比特流。
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公开(公告)号：US07263481B2
公开(公告)日：2007-08-28
申请号：US10754468
申请日：2004-01-09
IPC分类号： G10L19/04
CPC分类号： G10L19/173
摘要： A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution. The method includes pre-computing weighting factors for a perceptual weighting filter optimized to a specific source and destination codec pair, pre-configuring the transcoding strategies, mapping CELP parameters in the CELP parameter space according to the selected coding strategy, performing Linear Prediction analysis if specified by the transcoding strategy, perceptually weighting the speech using with tuned weighting factors, and searching for adaptive codebook and fixed-codebook parameters to obtain a quantized set of destination codec parameters.
摘要翻译： 一种用于语音代码转换器的方法和装置，其使用使用调谐加权因子的感知加权，将代表根据第一语音压缩标准编码的数据的比特流转换为表示数据帧的比特流，使得 第二语音压缩标准的比特流，以产生比可比较的串联转码解决方案更高质量的解码语音信号。 该方法包括预先计算针对特定源和目标编解码器对优化的感知加权滤波器的加权因子，预配置转码策略，根据所选择的编码策略映射CELP参数空间中的CELP参数，执行线性预测分析，如果 由转码策略指定，用调谐的加权因子感知加权语音，并搜索自适应码本和固定码本参数以获得量化的目的地编解码器参数集合。
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公开(公告)号：US07254533B1
公开(公告)日：2007-08-07
申请号：US10688857
申请日：2003-10-17
IPC分类号： G10L19/00
CPC分类号： G10L19/16
摘要： An apparatus and method for encoding and decoding a voice signal. The apparatus includes an encoder configured to generate an output bitstream signal from an input voice signal. The output bitstream signal is associated with at least a first standard of a first plurality of CELP voice compression standards. Additionally, the apparatus includes a decoder configured to generate an output voice signal from an input bitstream signal. The input bitstream signal is associated with at least a first standard of a second plurality of CELP voice compression standards. The CELP encoder includes a plurality of codec-specific encoder modules. Additionally, the CELP encoder includes a plurality of generic encoder modules. The CELP decoder includes a plurality of codec-specific decoder modules. Additionally, the CELP decoder includes a plurality of generic decoder modules.
摘要翻译： 一种用于对语音信号进行编码和解码的装置和方法。 该装置包括：编码器，被配置为从输入语音信号生成输出比特流信号。 输出比特流信号与第一多个CELP语音压缩标准的至少第一标准相关联。 另外，该装置包括被配置为从输入比特流信号产生输出语音信号的解码器。 输入比特流信号与第二多个CELP语音压缩标准的至少第一标准相关联。 CELP编码器包括多个编解码器专用编码器模块。 此外，CELP编码器包括多个通用编码器模块。 CELP解码器包括多个编解码器专用解码器模块。 此外，CELP解码器包括多个通用解码器模块。
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10.发明授权Method and apparatus for compressed video bitstream conversion with reduced-algorithmic-delay 有权用于压缩视频比特流转换的方法和装置，具有减少的算法延迟公开(公告)号：US08837605B2
公开(公告)日：2014-09-16
申请号：US11862117
申请日：2007-09-26
申请人： Wei Jyh Heng , Wei Zhou , Jianwei Wang , Marwan A. Jabri , Chengji Zhao
发明人： Wei Jyh Heng , Wei Zhou , Jianwei Wang , Marwan A. Jabri , Chengji Zhao
CPC分类号： H04N7/26941 , H04N19/40 , H04N19/61 , H04N19/86
摘要： The present invention relates to converting media bitstreams across different networks in a media gateway without any algorithmic delay, and reduces the computation load within the transmission in the situation where the bandwidth of the outgoing network varies dynamically. A first embodiment of the present invention provides an apparatus and a method for a Reduced-Algorithmic-Delay Media Stream Unit Conversion module which is a light weight Simple Pass-Through operation. A second embodiment of the present invention provides an apparatus and a method for a Reduced-Algorithmic-Delay Video Rate Conversion. An alternative embodiment provides an apparatus and a method for a Smart Pass-Through Operation which involves switching between the Simple Pass-Through and the Rate Converter. The methods and apparatuses provided by the first and second embodiment can be used as a stand alone system, or as part of the module of the alternative embodiment.
摘要翻译： 本发明涉及在媒体网关中的不同网络上转换媒体比特流而没有任何算法延迟，并且在出局网络的带宽动态变化的情况下减少传输内的计算负荷。 本发明的第一实施例提供了一种重量轻的简单通过操作的减速算法延迟媒体流单元转换模块的装置和方法。 本发明的第二实施例提供了一种用于减少算法延迟视频速率转换的装置和方法。 替代实施例提供了一种智能直通操作的装置和方法，其涉及在简单通过和速率转换器之间切换。 由第一和第二实施例提供的方法和装置可以用作独立系统，或者作为替代实施例的模块的一部分。
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