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1.发明授权公开(公告)号：US08543392B2
公开(公告)日：2013-09-24
申请号：US12528869
申请日：2008-02-29
IPC分类号： G10L19/00
CPC分类号： G10L19/00 , G10L19/005 , G10L19/0204 , G10L19/0208 , G10L19/0212 , G10L19/24
摘要： Disclosed is an encoding device which can accurately specify a band having a large error among all the bands by using a small calculation amount. A first position identifier uses a first layer error conversion coefficient indicating an error of a decoding signal for an input signal so as to search for a band having a large error in a relatively wide bandwidth in all the bands of the input signal and generates first position information indicating the identified band. A second position identifier searches for a target frequency band having a large error in a relatively narrow bandwidth in the band identified by the first position identifier and generates second position information indicating the identified target frequency band. An encoder encodes a first layer decoding error conversion coefficient contained in the target frequency band.
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公开(公告)号：US20130176150A1
公开(公告)日：2013-07-11
申请号：US13822823
申请日：2011-09-07
IPC分类号： H03M7/00
摘要： An encoding device enables the amount of processing operations to be significantly reduced while minimizing deterioration in the quality of an output signal. This encoding device (101) encodes an input signal by determining the correlation between a first signal generated by using the input signal and a second signal generated by a predetermined method. An importance assessment unit (202) sets the importance of each of a plurality of processing units obtained by dividing the frames of the input signal. A CELP coder (203) performs sparse processing in which the amplitude value of a predetermined number of samples among multiple samples constituted by the first signal and/or the second signal in each processing unit is set to zero according to the importance that was set for each processing unit, and calculates the correlation between the first signal and the second signal, either of which was subjected to sparse processing.
摘要翻译： 编码装置使得可以显着减少处理操作量，同时最小化输出信号质量的劣化。 该编码装置（101）通过确定通过使用输入信号产生的第一信号和通过预定方法产生的第二信号之间的相关性来对输入信号进行编码。 重要性评估单元（202）设置通过划分输入信号的帧而获得的多个处理单元中的每个处理单元的重要性。 CELP编码器（203）执行稀疏处理，其中根据为每个处理单元中的第一信号和/或第二信号构成的多个样本中的预定数量样本的振幅值被设置为零，根据为 每个处理单元，并且计算第一信号和第二信号之间的相关性，其中任一个都进行稀疏处理。
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公开(公告)号：US08423371B2
公开(公告)日：2013-04-16
申请号：US12809150
申请日：2008-12-22
CPC分类号： G10L19/0204 , G10L21/038
摘要： An encoder capable of reducing the degradation of the quality of the decoded signal in the case of band expansion in which the high band of the spectrum of an input signal is estimated from the low band. In this encoder, a first layer encoder encodes an input signal and generates first encoded information, a first layer decoder decodes the first encoded information and generates a first decoded signal, a characteristic judger analyzes the intensity of the harmonic structure of the input signal and generates harmonic characteristic information representing the analysis result, and a second layer encoder changes, on the basis of the harmonic characteristic information, the numbers of bits allocated to parameters included in second encoded information created by encoding the difference between the input signal and the first decoded signal before creating the second information.
摘要翻译： 在频带扩展的情况下，能够降低解码信号的质量劣化的编码器，其中从低频段估计输入信号的频谱的高频带。 在该编码器中，第一层编码器编码输入信号并产生第一编码信息，第一层解码器解码第一编码信息并产生第一解码信号，特征判断器分析输入信号的谐波结构的强度并产生 表示分析结果的谐波特征信息，第二层编码器根据谐波特性信息，改变分配给包括在通过对输入信号和第一解码信号之间的差进行编码而产生的第二编码信息中的参数的比特数 在创建第二个信息之前。
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4.发明申请SPECTRAL SMOOTHING DEVICE, ENCODING DEVICE, DECODING DEVICE, COMMUNICATION TERMINAL DEVICE, BASE STATION DEVICE, AND SPECTRAL SMOOTHING METHOD 有权光谱平滑装置，编码装置，解码装置，通信终端装置，基站装置和光谱平滑方法公开(公告)号：US20110137643A1
公开(公告)日：2011-06-09
申请号：US13057454
申请日：2009-08-07
IPC分类号： G10L19/02
CPC分类号： G10L19/0204 , G10L19/0212 , G10L19/032 , G10L19/24 , G10L21/02
摘要： Disclosed is a spectral smoothing device with a structure whereby smoothing is performed after a nonlinear conversion has been performed for a spectrum calculated from an audio signal, and with which the amount of processing calculation is significantly reduced while maintaining excellent audio quality. With this spectral smoothing device, a sub band division unit (102) divides an input spectrum into multiple sub bands; a representative value calculation unit (103) calculates a representative value for each sub band using an arithmetic mean and a geometric mean; with respect to each representative value, a nonlinear conversion unit (104) performs a nonlinear conversion the characteristic of which is further emphasized as the value increases; and a smoothing unit (105) that smoothes the representative value which has undergone the nonlinear conversion for each sub band, at the frequency domain.
摘要翻译： 公开了一种光谱平滑装置，其具有在对从音频信号计算出的频谱进行非线性转换之后进行平滑处理，并且在保持优良音频质量的同时显着减少处理计算量的结构。 利用该频谱平滑装置，子带分割单元（102）将输入频谱划分成多个子频带; 代表值计算单元（103）使用算术平均值和几何平均值计算每个子带的代表值; 对于每个代表值，非线性转换单元（104）执行非线性转换，其特性随着值的增加被进一步强调; 以及平滑化单元（105），其以频域对每个子带进行了非线性转换的代表值进行平滑化。
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公开(公告)号：US20100332221A1
公开(公告)日：2010-12-30
申请号：US12918575
申请日：2009-03-13
CPC分类号： G10L21/038 , G10L19/18 , G10L19/24
摘要： It is possible to improve quality of a decoding signal in a band spread for estimating a high band from a low band of a decoding signal. A first layer encoding unit (202) encodes a lower band portion below a predetermined frequency of an input signal so as to generate first layer encoded information. A first layer decoding unit (203) decodes the first layer encoded information so as to generate a first layer demodulated signal. A second layer encoding unit (206) divides a high band portion higher than a predetermined frequency of an input signal into a plurality of sub-bands and estimates each of the sub-bands from the input signal or the first layer decoded signal by using the estimation result of the sub-band adjacent to the lower band side so as to generate second encoded information including the estimation results of the sub-bands.
摘要翻译： 可以提高从解码信号的低频带估计高频带的频带扩展中的解码信号的质量。 第一层编码单元（202）对输入信号的预定频率以下的低频带部分进行编码，以产生第一层编码信息。 第一层解码单元（203）对第一层编码信息进行解码，以产生第一层解调信号。 第二层编码单元（206）将高于输入信号的预定频率的高频带部分划分成多个子带，并且通过使用第二层编码单元从输入信号或第一层解码信号估计每个子带 估计与低频带侧相邻的子带的结果，以产生包括子频带的估计结果的第二编码信息。
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公开(公告)号：US20100106496A1
公开(公告)日：2010-04-29
申请号：US12528877
申请日：2008-02-29
IPC分类号： G10L19/00
CPC分类号： G10L19/032 , G10L19/0212 , G10L19/10
摘要： Provided is an encoding device which can reduce the encoding distortion as compared to the conventional technique and can obtain a preferable sound quality for auditory sense. In the encoding device, a shape quantization unit (111) quantizes the shape of an input spectrum with a small number of pulse positions and polarities. The shape quantization unit (111) sets a pulse amplitude width to be searched later upon search of the pulse position to a value not greater than the pulse amplitude width which has been searched previously. A gain quantization unit (112) calculates a gain of a pulse searched by the shape quantization unit (111) for each of bands.
摘要翻译： 提供了一种与传统技术相比可以减少编码失真并且可以获得用于听觉的优选声音质量的编码装置。 在编码装置中，形状量化单元（111）以少量的脉冲位置和极性量化输入频谱的形状。 形状量化单元（111）将脉冲位置搜索后的脉冲幅度宽度设定为以前已经搜索到的脉冲幅度宽度以下的值。 增益量化单元（112）针对每个频带计算由形状量化单元（111）搜索的脉冲的增益。
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公开(公告)号：US20100057446A1
公开(公告)日：2010-03-04
申请号：US12529219
申请日：2008-02-29
CPC分类号： G10L19/038 , G10L19/10 , G10L25/18
摘要： Provided is an encoding device which can obtain a sound quality preferable for auditory sense even if the number of information bits is small. The encoding device includes a shape quantization unit (111) having: a section search unit (121) which searches for a pulse for each of bands into which a predetermined search section is divided; and a whole search unit (122) which performs search for a pulse over the entire search section. The shape of an input spectrum is quantized by a small number of pulse positions and polarities. A gain quantization unit (112) calculates a gain of the pulse searched by the shape quantization unit (111) and quantizes the gain for each of the bands.
摘要翻译： 提供一种编码装置，即使信息比特数较少，也可以获得听觉优先的声音质量。 编码装置包括形状量化单元（111），具有：搜索单元（121），搜索预定搜索区被分割成的每个频带的脉冲; 以及整个搜索单元（122），其执行搜索整个搜索部分的脉冲。 输入频谱的形状由少量的脉冲位置和极性量化。 增益量化单元（112）计算由形状量化单元（111）搜索的脉冲的增益，并对每个频带的增益进行量化。
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8.发明授权公开(公告)号：US09508356B2
公开(公告)日：2016-11-29
申请号：US13641493
申请日：2011-04-01
CPC分类号： G10L19/24 , G10L19/038 , G10L2019/0006
摘要： An encoding device is provided for improving decoded signal quality. A local search unit conducts a local search on a plurality of sub-bands generated by dividing spectrum data, and calculates lattice vectors for the spectra in the plurality of sub-bands. A multi-rate indexing unit uses the lattice vectors to perform multi-rate indexing on each of the sub-bands, and generates indexing information showing the results thereof. A band selection unit determines certain sub-bands from amongst the plurality of sub-bands in a plurality of encoding layers as perceptually important sub-band groups, where these are: within a selection range of sub-bands wherein the total number of encoding bits allocated to each of the plurality of sub-bands in the indexing information is equal to or less than an already set value, and within a sub-band selection range with the highest total energy of each of the plurality of sub-bands.
摘要翻译： 提供了一种用于改善解码信号质量的编码装置。 本地搜索单元对通过分割频谱数据产生的多个子带进行局部搜索，并计算多个子带中的频谱的格子向量。 多速率索引单元使用格子向量在每个子带上执行多速率索引，并且生成表示其结果的索引信息。 频带选择单元确定多个编码层中的多个子频带中的某些子频带是感知上重要的子频带组，其中，它们是：在子频带的选择范围内，其中编码比特的总数 在索引信息中分配给多个子带中的每一个的分配带宽等于或小于已经设定的值，并且在多个子带中的每个子带的总能量最高的子带选择范围内。
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公开(公告)号：US08560328B2
公开(公告)日：2013-10-15
申请号：US12518371
申请日：2007-12-14
CPC分类号： G10L19/24 , G10L21/038
摘要： A decoding device is capable of flexibly calculating high-band spectrum data with a high accuracy in accordance with an encoding band selected by an upper-node layer of the encoding side. In this device: a first layer decoder decodes first layer encoded information to generate a first layer decoded signal; a second layer decoder decodes second layer encoded information to generate a second layer decoded signal; a spectrum decoder performs a band extension process by using the second layer decoded signal and the first layer decoded signal up-sampled in an up-sampler so as to generate an all-band decoded signal; and a switch outputs the first layer decoded signal or the all-band decoded signal according to the control information generated in a controller.
摘要翻译： 解码装置能够根据由编码侧的上层节点选择的编码频带，以高精度灵活地计算高频带频谱数据。 在该设备中：第一层解码器解码第一层编码信息以产生第一层解码信号; 第二层解码器解码第二层编码信息以产生第二层解码信号; 频谱解码器通过使用第二层解码信号和在上采样器中被上采样的第一层解码信号来执行频带扩展处理，以便产生全频带解码信号; 并且开关根据在控制器中生成的控制信息输出第一层解码信号或全频带解码信号。
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10.发明授权Coding device and coding method with high layer coding based on lower layer coding results 有权基于较低层编码结果的编码设备和具有高层编码的编码方法公开(公告)号：US08306827B2
公开(公告)日：2012-11-06
申请号：US12282287
申请日：2007-03-08
IPC分类号： G10L19/12
CPC分类号： G10L19/24
摘要： A coding device is provided with features in which optimum coding in a higher layer is flexibly carried out based on a coding result of a lower layer and a quality audio signal in limited circumstances is served to users. In this coding device, a basic layer coding unit codes an input signal to generate a basic layer information source code and outputs a linear prediction coefficient (LPC) and a quantum LPC, which are parameters calculated at coding, to an expanded layer control unit. A basic layer decoding unit decodes the basic layer information source code. An adding unit reverses a polarity of a basic layer decoded signal, adds the same to the input signal, and calculates a difference signal. The expanded layer control unit generates expanded layer mode information indicative of a coding mode in an expanded layer based on the LPC and the quantum LPC. An expanded layer coding unit codes the difference signal obtained from the adding unit under control of the expanded layer control unit.
摘要翻译： 编码装置具有这样的特征，其中基于较低层的编码结果灵活地执行较高层中的最佳编码，并且在有限的情况下向用户提供质量音频信号。 在该编码装置中，基本层编码单元对输入信号进行编码以生成基本层信息源代码，并将作为编码计算出的参数的线性预测系数（LPC）和量子LPC输出到扩展层控制单元。 基本层解码单元解码基本层信息源代码。 加法单元反转基本层解码信号的极性，将其相加于输入信号，并计算差分信号。 扩展层控制单元基于LPC和量子LPC生成表示扩展层中的编码模式的扩展层模式信息。 扩展层编码单元在扩展层控制单元的控制下对从加法单元获得的差分信号进行编码。
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