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公开(公告)号：US08924208B2
公开(公告)日：2014-12-30
申请号：US13521112
申请日：2011-01-12
IPC分类号： G10L19/02 , G10L19/032
CPC分类号： G10L19/0208 , G10L19/032
摘要： An encoding device and encoding method improve a quality of a decoded signal under very low bit rate conditions using a small amount of computation. A spectrum corrector performs correction processing on a subspectrum in each subband in such a manner that samples equal to or greater than a subspectrum average value are left unchanged and samples smaller than the subspectrum average value are replaced by zero. As a result of this, it is possible to significantly reduce the number of bits required to quantize the subspectrums without a substantial reduction in quality in a local searcher and in a multi-rate indexer.
摘要翻译： 编码装置和编码方法使用少量的计算在非常低的比特率条件下提高解码信号的质量。 频谱校正器以等于或大于子频谱平均值的样本保持不变并且将小于子频谱平均值的样本替换为零的方式对每个子带中的子频谱进行校正处理。 因此，可以显着地减少量化子频段所需的位数，而不会在本地搜索器和多速率分度器中显着降低质量。
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公开(公告)号：US08422569B2
公开(公告)日：2013-04-16
申请号：US12863690
申请日：2009-01-23
IPC分类号： H04L27/00
CPC分类号： G10L19/0204 , G10L19/24 , G10L21/038
摘要： Provided is an encoding device which divides an input signal into a low-range component and a high-range component and encodes the components in separate encoding units. The encoding device can improve quality of a decoded signal. The encoding device (101) includes: a band division process unit (201) which subjects an input signal to a band division process so as to obtain a lower intermediate-range component lower than a first frequency and a high-range component higher than the first frequency; a low-range encoding unit (202) which suppresses a portion of the lower intermediate-range component higher than a second frequency so as to obtain a low-range component and encodes the low-range component so as to obtain low-range encoded information; an intermediate-range correction unit (203) corrects the intermediate-range component higher than the second frequency among the suppressed lower intermediate-range component so as to obtain a corrected intermediate-range component; an intermediate high-range encoding unit (204) which encodes the corrected intermediate-range component and the high-range component so as to obtain intermediate high-range encoded information; and a multiplexing unit (205) which multiplexes the low-range encoded information and the intermediate high-range encoded information so as to obtain encoded information.
摘要翻译： 提供了一种编码装置，其将输入信号分成低范围分量和高范围分量，并以分开的编码单位对分量进行编码。 编码装置可以提高解码信号的质量。 编码装置（101）包括：频带分割处理单元（201），其对输入信号进行频带分割处理，以获得低于比第一频率低的第一频率和高范围分量的较低中间范围分量 第一频率 低范围编码单元，其抑制低于第二频率的较低中间范围分量的一部分以获得低范围分量，并对低范围分量进行编码，以获得低范围编码信息 ; 中间范围校正单元（203）在被抑制的较低中间范围分量中校正高于第二频率的中间范围分量，以获得校正的中间范围分量; 中间高范围编码单元，其对所述校正的中间范围分量和所述高范围分量进行编码，以获得中间的高范围编码信息; 以及多路复用低范围编码信息和中间高范围编码信息以获得编码信息的复用单元（205）。
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公开(公告)号：US08311818B2
公开(公告)日：2012-11-13
申请号：US13367840
申请日：2012-02-07
IPC分类号： G10L19/02
CPC分类号： G10L19/0208 , G10L19/038 , G10L19/24
摘要： A transform coding apparatus includes an input scale factor calculating section that calculates an input scale factor having a predetermined number of scale factors associated with an input spectrum as an element, and a codebook that stores a plurality of scale factor candidates having a predetermined number of elements and outputs one scale factor candidate. The transform coding apparatus also includes an error calculating section that calculates an error on a per element basis, a weighted error calculating section that determines a weight on a per element basis and calculates a sum of products of the error and the weight to calculate a weighted error, and a searching section that searches for a scale factor candidate that minimizes the weighted error in the codebook.
摘要翻译： 变换编码装置包括：输入比例因子计算部分，其计算具有与输入频谱相关联的预定数量的比例因子作为元素的输入比例因子;以及码本，其存储具有预定数量的元素的多个比例因子候选 并输出一个比例因子候选。 变换编码装置还包括：以每个元素为基础计算误差的误差计算部，加权误差计算部，其基于每个元素确定权重，并计算误差和权重的乘积之和，以计算加权的 错误和搜索部分，其搜索使码本中的加权误差最小化的比例因子候选。
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公开(公告)号：US20110307248A1
公开(公告)日：2011-12-15
申请号：US13203122
申请日：2010-02-25
CPC分类号： G10L19/0204 , G10L21/038
摘要： Provided is an encoder which can effectively encode/decode spectrum data of a broad frequency signal in a high frequency range, can dramatically reduce the number of the arithmetic operations to be performed, and can improve the quality of the decoded signal. The encoder comprises a first layer coding unit (202) which encodes an input signal in a low frequency range below a predetermined frequency to generate first coded information, a first layer decoding unit (203) which decodes the first coded information to generate a decoded signal, and a second layer coding unit (206) which splits the input signal in a high frequency range above a predetermined frequency, into a plurality of sub-bands, presumes the respective sub-hands from the input signal or decoded signal, partially selects a spectrum component within each sub-band, and calculates an amplitude adjustment parameter used to adjust the amplitude of the selected spectrum component to thereby generate second coding information.
摘要翻译： 提供了能够在高频范围内有效地编码/解码宽频信号的频谱数据的编码器，可以显着地减少要执行的算术运算的数量，并且可以提高解码信号的质量。 编码器包括对低于预定频率的低频范围内的输入信号进行编码以产生第一编码信息的第一层编码单元（202），对第一编码信息进行解码以产生解码信号的第一层解码单元（203） ，以及将高于预定频率的高频范围内的输入信号分割成多个子带的第二层编码单元（206），从输入信号或解码信号中假设相应的副手，部分地选择 并且计算用于调整所选择的频谱分量的振幅的幅度调整参数，从而生成第二编码信息。
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公开(公告)号：US20100169081A1
公开(公告)日：2010-07-01
申请号：US12517956
申请日：2007-12-12
CPC分类号： G10L19/0204 , G10L19/0212 , G10L19/038 , G10L19/083 , G10L19/24
摘要： An encoding device includes: a frequency region converter which converts an inputted audio signal into a frequency region; a band selector which selects a quantization object band from a plurality of sub bands obtained by dividing the frequency region; and a shape quantizer which quantizes the shape of the frequency region parameter of the quantization object band. When a prediction encoding presence/absence determiner determines that the number of common sub bands between the quantization object band and the quantization object band selected in the past is not smaller than a predetermined value, a gain quantizer performs prediction encoding on the gain of the frequency region parameter of the quantization object band. When the number of common sub bands is smaller than the predetermined value, the gain quantizer non-predictively encodes the gain of the frequency region parameter of the quantization object band.
摘要翻译： 编码装置包括：频率区域转换器，其将输入的音频信号转换成频率区域; 频带选择器，其从通过划分频率区域获得的多个子频带中选择量化对象频带; 以及量化量化对象带的频域参数的形状的形状量化器。 当预测编码存在/不存在确定器确定量化对象带和过去选择的量化对象带之间的公共子带的数量不小于预定值时，增益量化器对频率的增益执行预测编码 量化对象带的区域参数。 当公共子带的数量小于预定值时，增益量化器对量化对象带的频域参数的增益进行非预测编码。
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公开(公告)号：US20100017198A1
公开(公告)日：2010-01-21
申请号：US12518371
申请日：2007-12-14
IPC分类号： G10L19/00
CPC分类号： G10L19/24 , G10L21/038
摘要： Disclosed is a decoding device and others 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 decoding unit (202) decodes first layer encoded information to generate a first layer decoded signal; a second layer decoding unit (204) decodes second layer encoded information to generate a second layer decoded signal; a spectrum decoding unit (205) performs a band extension process by using the second layer decoded signal and the first layer decoded signal up-sampled in an up-sampling unit (203) so as to generate a all-band decoded signal; and a switch (206) outputs the first layer decoded signal or the all-band decoded signal according to the control information generated in a control unit (201).
摘要翻译： 公开了一种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谱数据的解码装置等。 在该设备中：第一层解码单元（202）解码第一层编码信息以产生第一层解码信号; 第二层解码单元（204）对第二层编码信息进行解码以产生第二层解码信号; 频谱解码单元（205）通过使用第二层解码信号和在上采样单元（203）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; 开关（206）根据在控制单元（201）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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67.发明授权Decoding and encoding apparatus and method for efficiently encoding spectral data in a high-frequency portion based on spectral data in a low-frequency portion of a wideband signal 有权基于宽带信号的低频部分中的频谱数据高效地编码高频部分中的频谱数据的解码编码装置和方法公开(公告)号：US09076434B2
公开(公告)日：2015-07-07
申请号：US13703491
申请日：2011-06-07
IPC分类号： G10L19/008 , G10L19/24 , H03G3/20 , G10L21/038 , G10L19/02 , G10L19/18
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/18 , G10L19/24 , G10L21/038 , H03G3/20
摘要： A decoding device which can efficiently encode/decode spectral data in a high pass section of a broadband signal. In the device, a sample group extraction unit partially selects spectral components by means of an ease of selection importance which is the extent that the spectral components come close to the spectral component having the maximum amplitude value, in the spectrum of a high pass estimated by means of first parameters contained in second encoded information and bands most approximated to each of the spectrums of a plurality of sub-bands calculated from the spectrum of a second decode signal; a logarithmic gain application unit applies second parameters to the partially selected spectral components; and an interpolation processing unit applies third parameters which are adaptively set according to the value of the second parameters, to the spectral components which were not partially selected.
摘要翻译： 一种可以在宽带信号的高通部分中有效地编码/解码频谱数据的解码装置。 在该装置中，采样组提取单元通过在频谱分量接近于具有最大振幅值的频谱分量的范围内的选择重要性的便利性部分地选择频谱分量，在由 包含在第二编码信息中的第一参数的装置和最接近于从第二解码信号的频谱计算的多个子带的每个频谱的频带; 对数增益应用单元将第二参数应用于部分选择的频谱分量; 并且内插处理单元将根据第二参数的值自适应地设定的第三参数应用于未被部分选择的频谱分量。
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公开(公告)号：US08983831B2
公开(公告)日：2015-03-17
申请号：US13203122
申请日：2010-02-25
IPC分类号： G10L19/02 , G10L21/038
CPC分类号： G10L19/0204 , G10L21/038
摘要： Provided is an encoder which can effectively encode/decode spectrum data of a broad frequency signal in a high frequency range, can dramatically reduce the number of the arithmetic operations to be performed, and can improve the quality of the decoded signal. The encoder comprises a first layer coding unit (202) which encodes an input signal in a low frequency range below a predetermined frequency to generate first coded information, a first layer decoding unit (203) which decodes the first coded information to generate a decoded signal, and a second layer coding unit (206) which splits the input signal in a high frequency range above a predetermined frequency, into a plurality of sub-bands, presumes the respective sub-hands from the input signal or decoded signal, partially selects a spectrum component within each sub-band, and calculates an amplitude adjustment parameter used to adjust the amplitude of the selected spectrum component to thereby generate second coding information.
摘要翻译： 提供了能够在高频范围内有效地编码/解码宽频信号的频谱数据的编码器，可以显着地减少要执行的算术运算的数量，并且可以提高解码信号的质量。 编码器包括对低于预定频率的低频范围内的输入信号进行编码以产生第一编码信息的第一层编码单元（202），对第一编码信息进行解码以产生解码信号的第一层解码单元（203） ，以及将高于预定频率的高频范围内的输入信号分割成多个子带的第二层编码单元（206），从输入信号或解码信号中假设相应的副手，部分地选择 并且计算用于调整所选择的频谱分量的振幅的幅度调整参数，从而生成第二编码信息。
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公开(公告)号：US08949117B2
公开(公告)日：2015-02-03
申请号：US13501354
申请日：2010-10-13
申请人： Tomofumi Yamanashi
发明人： Tomofumi Yamanashi
CPC分类号： G10L19/24
摘要： Disclosed is an encoding device, wherein the energy information of a given layer is efficiently encoded using a scalable encoding method in which the band to be encoded is selected in each layer, and the quality of decoded signals can be enhanced. An encoding device (101) is equipped with: a second layer encoding unit (205) which generates a second layer encoded information included in which is the first band information of said band; a second layer decoding unit (206) which generates a first decoding signal by using the second layer encoded information; an adding unit (207) which generates a second input signal by using the first decoding signal; and a third layer encoding unit (208) which generates a third layer encoded information included in which is a second band information obtained by selecting a second band to be quantized in the second input signal, and a corrected gain (energy information).
摘要翻译： 公开了一种编码装置，其中使用其中在每个层中选择要编码的频带的可分级编码方法来有效地编码给定层的能量信息，并且可以提高解码信号的质量。 编码装置（101）装备有：第二层编码单元（205），其生成包括在其中的所述频带的第一频带信息的第二层编码信息; 第二层解码单元，通过使用第二层编码信息产生第一解码信号; 添加单元，其通过使用第一解码信号生成第二输入信号; 以及生成第三层编码信息的第三层编码单元（208），所述第三层编码信息是通过选择第二输入信号中要量化的第二频带和校正增益（能量信息）获得的第二频带信息。
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公开(公告)号：US08452588B2
公开(公告)日：2013-05-28
申请号：US12918575
申请日：2009-03-13
IPC分类号： G10L11/04
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 encoder encodes a lower band portion below a predetermined frequency of an input signal so as to generate first layer encoded information. A first layer decoder decodes the first layer encoded information so as to generate a first layer demodulated signal. A second layer encoder 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。 第一层编码器对低于输入信号的预定频率的低频段编码，以便产生第一层编码信息。 第一层解码器对第一层编码信息进行解码，以产生第一层解调信号。 第二层编码器将输入信号的预定频率的高频带部分分割成多个子频带，并通过使用估计结果从输入信号或第一层解码信号估计每个子频带 以产生包括子带的估计结果的第二编码信息。
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