公开(公告)号：US20130124201A1

公开(公告)日：2013-05-16

申请号：US13703491

申请日：2011-06-07

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L19/008 ,  H03G3/20

CPC分类号： G10L19/008 ,  G10L19/0212 ,  G10L19/18 ,  G10L19/24 ,  G10L21/038 ,  H03G3/20

摘要： Disclosed is a decoding device which can efficiently encode/decode spectral data in a high pass section of a broadband signal. In the disclosed device: a sample group extraction unit (372) 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 (373) applies second parameters to the partially selected spectral components; and an interpolation processing unit (374) 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： 公开了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。 在所公开的装置中：采样组提取单元（372）通过在频谱分量接近具有最大振幅值的频谱分量的范围内的选择重要性的方面来部分地选择频谱分量 通过第二编码信息中包含的第一参数和最接近于从第二解码信号的频谱计算出的多个子带的每个频谱的频带估计的高通; 对数增益应用单元（373）将第二参数应用于部分选择的频谱分量; 并且插值处理单元（374）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。

公开(公告)号：US20130035943A1

公开(公告)日：2013-02-07

申请号：US13641493

申请日：2011-04-01

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L21/00

CPC分类号： G10L19/24 ,  G10L19/038 ,  G10L2019/0006

摘要： Disclosed is an encoding device capable of improving decoded signal quality. A local search unit (302) 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 (303) 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 (304) 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： 公开了能够提高解码信号质量的编码装置。 本地搜索单元（302）对通过分割频谱数据产生的多个子带进行局部搜索，并且计算多个子带中的频谱的格子向量。 多速率索引单元（303）使用格子向量对每个子带执行多速率索引，并生成表示其结果的索引信息。 频带选择单元（304）从多个编码层中的多个子频带中确定某些子频带，作为感知上重要的子频带组，其中它们是：在子频段的选择范围内，其中总数 分配给索引信息中的多个子带中的每一个的编码比特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 。

公开(公告)号：US20120296640A1

公开(公告)日：2012-11-22

申请号：US13521112

申请日：2011-01-12

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L19/02

CPC分类号： G10L19/0208 ,  G10L19/032

摘要： Disclosed are an encoding device and encoding method capable of improving the quality of a decoded signal under very low bit rate conditions using a small amount of computation. A spectrum correction unit (302) performs correction processing on the subspectrum in each subband in such a manner that samples equal to or greater than a subspectrum average value are left unchanged while 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 substantial reduction in quality in a local search unit (303) and in a multi-rate indexing unit (304).

摘要翻译： 公开了一种编码装置和编码方法，其能够使用少量的计算来在非常低的比特率条件下提高解码信号的质量。 频谱校正单元（302）以等于或大于子频谱平均值的样本在小于子频谱平均值的样本被零替换的方式对每个子带中的子频谱进行校正处理。 作为其结果，可以在本地搜索单元（303）和多速率分度单元（304）中显着地减少量化子频段所需的比特数量而不显着降低质量。

公开(公告)号：US20100274558A1

公开(公告)日：2010-10-28

申请号：US12809150

申请日：2008-12-22

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L19/04 ,  G10L21/00

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 encoding section (202) encodes an input signal and generates first encoded information, a first layer decoding section (203) decodes the first encoded information and generates a first decoded signal, a characteristic judging section (206) analyzes the intensity of the harmonic structure of the input signal and generates harmonic characteristic information representing the analysis result, and a second layer encoding section (207) 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，第一层编码部（202）对输入信号进行编码并生成第一编码信息，第一层解码部（203）对第一编码信息进行解码并生成第一解码信号，特性判断部（206）分析 输出信号的谐波结构的强度，并生成表示分析结果的谐波特性信息，第二层编码部（207）根据谐波特性信息，改变分配给第二 通过在创建第二信息之前对输入信号和第一解码信号之间的差进行编码而产生的编码信息。

公开(公告)号：US20100049512A1

公开(公告)日：2010-02-25

申请号：US12518375

申请日：2007-12-14

申请人： Masahiro Oshikiri ,  Tomofumi Yamanashi

发明人： Masahiro Oshikiri ,  Tomofumi Yamanashi

IPC分类号： G10L21/06

CPC分类号： G10L19/10 ,  G10L19/038 ,  H03M7/3082

摘要： Disclosed is an encoding device and others capable of suppressing quantization distortion while suppressing increase of a bit rate when encoding audio or the like. In the device, a dynamic range calculation unit (12) calculates a dynamic range of an input spectrum as an index indicating a peak of the input spectrum, a pulse quantity decision unit (13) decides the number of pulses of a vector candidate outputted from a shape codebook (14), and a shape codebook (14) outputs a vector candidate having the number of pulses decided by the pulse quantity decision unit (13) according to control from the search unit (17) by using a vector candidate element {−1, 0, +1}.

摘要翻译： 公开了一种能够抑制量化失真同时抑制编码音频等时的比特率增加的编码装置等。 在该装置中，动态范围计算单元（12）计算输入频谱的动态范围，作为表示输入频谱的峰值的指标，脉冲量决定单元（13）决定从 形状码本（14）和形状码本（14）根据来自搜索单元（17）的控制，通过使用矢量候选元素（9）输出具有由脉冲数量决定单元（13）决定的脉冲数的矢量候选， -1，0，+1}。

公开(公告)号：US09009037B2

公开(公告)日：2015-04-14

申请号：US13501389

申请日：2010-10-13

申请人： Tomofumi Yamanashi ,  Toshiyuki Morii

发明人： Tomofumi Yamanashi ,  Toshiyuki Morii

IPC分类号： G10L19/00 ,  G10L21/00 ,  G10L19/24 ,  G10L19/02

CPC分类号： G10L19/24 ,  G10L19/0204 ,  G10L19/0212

摘要： Disclosed is an encoding device that improves the quality of a decoded signal in a hierarchical coding (scalable coding) method, wherein a band to be quantized is selected for every level (layer). The encoding device (101) is equipped with a second layer encoding unit (205) that selects a first band to be quantized of a first input signal from among a plurality of sub-bands, and that generates second layer encoding information containing first band information of said band; a second layer decoding unit (206) that generates a first decoded signal using the second layer encoding information; an addition unit (207) that generates a second input signal using the first input signal and the first decoded signal; and a third layer encoding unit (208) that selects a second band to be quantized of the second input signal using the first decoded signal, and that generates third layer encoding information.

摘要翻译： 公开了一种以分级编码（可分级编码）方式提高解码信号的质量的编码装置，其中为每个级别（层）选择要被量化的频带。 编码装置（101）配备有从多个子带中选择要量化的第一输入信号的第一频带的第二层编码单元（205），并且生成包含第一频带信息的第二层编码信息 的乐队; 第二层解码单元，其使用所述第二层编码信息生成第一解码信号; 加法单元，用于使用第一输入信号和第一解码信号产生第二输入信号; 以及第三层编码单元，其使用第一解码信号来选择要量化的第二输入信号的第二频带，并且生成第三层编码信息。

公开(公告)号：US20090198491A1

公开(公告)日：2009-08-06

申请号：US12300225

申请日：2007-05-11

申请人： Kaoru Sato ,  Toshiyuki Morii ,  Tomofumi Yamanashi

发明人： Kaoru Sato ,  Toshiyuki Morii ,  Tomofumi Yamanashi

IPC分类号： G10L19/06

CPC分类号： H03M7/3082 ,  G10L19/07

摘要： Disclosed is an LPC vector quantization device capable of quantizing an LSP vector by using correlation between divided vectors. The device includes: a vector dividing unit (101) for dividing an inputted LSP vector into a first divided vector and a second divided vector; a first quantization unit (102) for quantizing the first divided vector by using a first codebook formed by a plurality of first code vectors to generate a first code; a prediction vector selection unit (103) for predicting a second divided vector from the first code by using a prediction codebook formed by a plurality of prediction code vectors to create a prediction vector; a prediction residual generation unit (104) for obtaining a residual between the prediction vector and the second divided vector to create a prediction residual vector; a second quantization unit (105) for quantizing the prediction residual vector by using a second codebook formed by a plurality of second code vectors to create a second code; and a multiplexing unit (106) for generating a quantization vector code by multiplexing the first code and the second code.

摘要翻译： 公开了一种LPC矢量量化装置，其能够通过使用分割矢量之间的相关来量化LSP矢量。 该装置包括：矢量分割单元，用于将输入的LSP矢量划分为第一分割矢量和第二分割矢量; 第一量化单元（102），用于通过使用由多个第一码矢量形成的第一码本来量化第一划分矢量以产生第一码; 预测矢量选择单元，用于通过使用由多个预测码矢量形成的预测码本来从第一码预测第二划分矢量以产生预测矢量; 预测残差生成单元，用于获得所述预测矢量和所述第二分割矢量之间的残差，以产生预测残差矢量; 第二量化单元（105），用于通过使用由多个第二代码矢量形成的第二代码簿来量化所述预测残差矢量以产生第二代码; 以及用于通过多路复用第一代码和第二代码来生成量化矢量代码的复用单元（106）。

公开(公告)号：US20070271101A1

公开(公告)日：2007-11-22

申请号：US11569377

申请日：2005-05-13

申请人： Kaoru Sato ,  Toshiyuki Morii ,  Tomofumi Yamanashi

发明人： Kaoru Sato ,  Toshiyuki Morii ,  Tomofumi Yamanashi

IPC分类号： G10L13/06

CPC分类号： G10L19/005 ,  G10L19/24

摘要： An audio/music decoding device capable of improving quality of a decoded signal generated by conceal processing of a frame erase using a scalable encoding method. The audio/music decoding device includes a frame loss detector that determines whether encoded information is normally received and generates frame loss information indicating the result of the determination. According to the frame loss information, a first decoder performs decoding by using at least one of the following encoded information: the first encoded information on the frame immediately before, the first encoded information on the current frame, and the second encoded information on the current frame. According to the frame loss information, a second decoder performs decoding by using at least one of the following encoded information: the first encoded information on the frame immediately before, the first encoded information on the current frame, the second encoded information on the frame immediately before, and the second encoded information on the current frame. An adder adds the decoded signal outputted from the first decoder and the decoded signal outputted from the second decoder.

摘要翻译： 一种音频/音乐解码装置，其能够使用可伸缩编码方法来提高通过隐藏处理帧擦除而产生的解码信号的质量。 音频/音乐解码装置包括帧丢失检测器，其确定编码信息是否被正常接收，并产生指示确定结果的帧丢失信息。 根据帧丢失信息，第一解码器通过使用以下编码信息中的至少一个来执行解码：紧接着的帧上的第一编码信息，当前帧上的第一编码信息和关于当前帧的第二编码信息 帧。 根据帧丢失信息，第二解码器通过使用以下编码信息中的至少一个来执行解码：紧接着的帧上的第一编码信息，当前帧上的第一编码信息，帧上的第二编码信息 之前，以及当前帧上的第二编码信息。 加法器将从第一解码器输出的解码信号和从第二解码器输出的解码信号相加。

公开(公告)号：US09076434B2

公开(公告)日：2015-07-07

申请号：US13703491

申请日：2011-06-07

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

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。

公开(公告)号：US08452588B2

公开(公告)日：2013-05-28

申请号：US12918575

申请日：2009-03-13

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

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。