-
1.发明授权CELP speech decoder modifying an input vector with a fixed waveform to transform a waveform of the input vector 有权CELP语音解码器用固定波形修改输入向量，以变换输入矢量的波形公开(公告)号：US08036887B2
公开(公告)日：2011-10-11
申请号：US12781049
申请日：2010-05-17
IPC分类号： G10L19/12
CPC分类号： G10L19/135 , G10L19/12 , G10L2019/0007 , G10L2019/0013
摘要： A CELP speech decoder includes an adaptive codebook that generates an adaptive code vector and a random codebook that generates a random code vector. The random codebook includes an input vector provider that provides an input vector including at least one pulse, each pulse having a position and a polarity, a fixed waveform storage that stores at least one fixed waveform, and a selector that selects at least one of a first process and a second process based on a value of an adaptive codebook gain. The random codebook further includes a convolution section that generates the random code vector by convoluting the at least one fixed waveform with the input vector when the first process is selected. A synthesis filter outputs synthesized speech by performing linear prediction coefficient synthesis on a signal based on the adaptive code vector and the random code vector.
摘要翻译： CELP语音解码器包括产生自适应码矢量的自适应码本和产生随机码矢量的随机码本。 所述随机码本包括输入向量提供者，所述输入向量提供器提供包括至少一个脉冲，每个具有位置和极性的脉冲，存储至少一个固定波形的固定波形存储器的输入向量，以及选择器， 第一处理和基于自适应码本增益的值的第二处理。 所述随机码本还包括卷积部分，其通过在选择所述第一处理时将所述至少一个固定波形与所述输入矢量进行卷积来生成所述随机码矢量。 合成滤波器通过对基于自适应码矢量和随机码矢量的信号执行线性预测系数合成来输出合成语音。
-
2.发明授权Pitch cycle search range setting apparatus and pitch cycle search apparatus 有权间距周期搜索范围设定装置和音调周期搜索装置公开(公告)号：US07542898B2
公开(公告)日：2009-06-02
申请号：US11619667
申请日：2007-01-04
申请人： Kaoru Sato , Kazutoshi Yasunaga , Toshiyuki Morii
发明人： Kaoru Sato , Kazutoshi Yasunaga , Toshiyuki Morii
IPC分类号： G10L19/00
CPC分类号： G10L19/09 , G10L19/125 , G10L25/90 , G10L2019/0002
摘要： An apparatus sets a pitch cycle search object in pitch cycle search processing for searching for a pitch cycle included in a linear predictive residual on a per subframe basis. A pitch cycle indicator of the apparatus sequentially output spitch cycle candidates within a predetermined pitch cycle search range at integral accuracy. A memory stores an integral component of a pitch cycle selected in pitch cycle search processing of a previous subframe. An adaptive sound source vector generator sets, as the pitch cycle search object in pitch cycle search processing in a processing subframe section, a group of candidates comprising a group of integral-accuracy pitch cycle candidates output from the pitch cycle indicator and a group of fractional-accuracy pitch cycle search candidates that cover a pitch cycle near an integral component of the pitch cycle read from the previous subframe integral pitch cycle memory using fractional accuracy.
摘要翻译： 一种装置在音调周期搜索处理中设置音调周期搜索对象，用于在每个子帧的基础上搜索包括在线性预测残差中的音调周期。 设备的音调周期指示器以整体精度依次输出预定音调周期搜索范围内的音调周期候选。 存储器存储在先前子帧的音调周期搜索处理中选择的音调周期的积分分量。 自适应声源矢量发生器将处理子帧部分中的音调周期搜索处理中的音调周期搜索对象设置为包括从音调周期指示符输出的一组积分精度音调周期候选组和一组分数 - 精确的音调周期搜索候选，其使用分数精度覆盖从前一个子帧积分音调周期存储器读取的音调周期的整数分量附近的音调周期。
-
公开(公告)号：US07110943B1
公开(公告)日：2006-09-19
申请号：US09462493
申请日：1999-06-08
IPC分类号： G10L19/12
CPC分类号： G10L19/12 , G10L2019/0005 , G10L2019/0014
摘要： First codebook 61 and second codebook 62 respectively have two subcodebooks, and in respective codebooks, addition sections 66 and 67 obtain respective excitation vectors by adding sub-excitation vectors fetched from respective two subcodebooks. Addition section 68 obtains an excitation sample by adding those excitation vectors. According to the aforementioned constitution, it is possible to store sub-excitation vectors with different characteristics in respective sub-codebooks. Therefore, it is possible to correspond to input signals with various characteristics, and achieve excellent sound qualities at the time of decoding.
摘要翻译： 第一码本61和第二码本62分别具有两个子码本，并且在相应码本中，相加部分66和67通过添加从相应的两个子码本中提取的子激励矢量来获得相应的激励矢量。 加法部分68通过加上这些激励矢量来获得激发样本。 根据上述结构，可以在各子码本中存储具有不同特性的子激励矢量。 因此，可以对应于具有各种特性的输入信号，并且在解码时获得优良的声音质量。
-
公开(公告)号：US20060080091A1
公开(公告)日：2006-04-13
申请号：US11281386
申请日：2005-11-18
IPC分类号： G10L19/12
CPC分类号： G10L19/10 , G10L19/107 , G10L19/12
摘要： A code excited linear prediction speech decoder is provided. An adaptive codebook generates an adaptive code vector. A random codebook generates a random code vector. A synthesis filter receives a signal based on the adaptive code vector and the random code vector, and performs linear prediction coefficient synthesis on the signal. The random codebook includes a pulse vector provider that provides a pulse vector having a signed unit pulse, a comparator that compares a value of adaptive codebook gain with a preset threshold value, a selector that selects a dispersion pattern from a plurality of dispersion patterns stored in a memory in accordance with a result of the comparison, and a generator that generates the dispersed vector by convoluting the pulse vector and the selected dispersion pattern.
-
5.发明授权Excitation vector generator and a method for generating an excitation vector including a convolution system 有权励磁矢量发生器和用于产生包括卷积系统的激励矢量的方法公开(公告)号：US06947889B2
公开(公告)日：2005-09-20
申请号：US09843939
申请日：2001-04-30
CPC分类号： G10L19/135 , G10L19/12 , G10L2019/0007 , G10L2019/0013
摘要： A random code vector reading section and a random codebook of a conventional CELP type speech coder/decoder are respectively replaced with an oscillator for outputting different vector streams in accordance with values of input seeds, and a seed storage section for storing a plurality of seeds. This makes it unnecessary to store fixed vectors as they are in a fixed codebook (ROM), thereby considerably reducing the memory capacity.
摘要翻译： 传统CELP型语音编码器/解码器的随机码矢量读取部分和随机码本分别被替换为根据输入种子的值输出不同矢量流的振荡器和用于存储多个种子的种子存储部分。 这使得不必像固定码本（ROM）一样存储固定向量，从而显着地降低了存储器容量。
-
公开(公告)号：US20050203736A1
公开(公告)日：2005-09-15
申请号：US11126171
申请日：2005-05-11
CPC分类号： G10L19/135 , G10L19/12 , G10L2019/0007 , G10L2019/0013
摘要： A noise canceller removes a noise component from an input speech signal. The noise canceller includes a noise cancellation coefficient adjuster that adjusts a noise cancellation coefficient to determine an amount of noise cancellation. A noise spectrum storage device stores an estimated noise spectrum. A noise estimator estimates a noise spectrum by comparing an input spectrum with a noise spectrum stored in the noise spectrum storage device. A noise canceling/spectrum compensator subtracts the noise spectrum stored in the noise spectrum storage device from the input spectrum based on a coefficient acquired by the noise cancellation coefficient adjuster.
摘要翻译： 噪声消除器从输入语音信号中去除噪声分量。 噪声消除器包括噪声消除系数调节器，其调整噪声消除系数以确定噪声消除量。 噪声频谱存储装置存储估计的噪声谱。 噪声估计器通过将输入频谱与存储在噪声频谱存储装置中的噪声谱进行比较来估计噪声谱。 噪声消除/频谱补偿器基于由噪声消除系数调整器获取的系数从输入频谱中减去存储在噪声频谱存储装置中的噪声谱。
-
公开(公告)号：US06757650B2
公开(公告)日：2004-06-29
申请号：US09855708
申请日：2001-05-16
IPC分类号： G10L1904
CPC分类号： G10L19/135 , G10L19/12 , G10L2019/0007 , G10L2019/0013
摘要： A random code vector reading section and a random codebook of a conventional CELP type speech coder/decoder are respectively replaced with an oscillator for outputting different vector streams in accordance with values of input seeds, and a seed storage section for storing a plurality of seeds. This makes it unnecessary to store fixed vectors as they are in a fixed codebook (ROM), thereby considerably reducing the memory capacity.
摘要翻译： 传统CELP型语音编码器/解码器的随机码矢量读取部分和随机码本分别被替换为根据输入种子的值输出不同矢量流的振荡器和用于存储多个种子的种子存储部分。 这使得不必像固定码本（ROM）一样存储固定向量，从而显着地降低了存储器容量。
-
公开(公告)号：US08352253B2
公开(公告)日：2013-01-08
申请号：US12783974
申请日：2010-05-20
CPC分类号： G10L19/10 , G10L19/107 , G10L19/12
摘要： A vector quantization apparatus performs coding of a linear predictive coding coefficient by multi-stage vector quantization. A first codebook and a second codebook store code vectors, and a storing section stores scalars. A first quantizing section extracts a first code vector stored in the first codebook and performs first stage quantization for quantizing a target vector using the first code vector. A second quantizing section extracts a second code vector stored in the second codebook, calculates a third code vector by multiplying the second code vector and one of the scalars stored in the storing section, performs distance calculation using the target vector, the first code vector and the third code vector, and performs second stage quantization for quantizing the target vector using a result of the distance calculation. Each scalar stored in the storing section is associated with at least one of the vectors stored in the first codebook.
摘要翻译： 矢量量化装置通过多级矢量量化来执行线性预测编码系数的编码。 第一码本和第二码本存储码矢量，存储部分存储标量。 第一量化部分提取存储在第一码本中的第一码矢量，并使用第一码矢量进行用于量化目标矢量的第一级量化。 第二量化部分提取存储在第二码本中的第二码矢量，通过将第二码矢量与存储在存储部分中的标量之一相乘来计算第三码矢量，使用目标矢量进行距离计算，第一码矢量和 第三码矢量，并且使用距离计算的结果来执行用于量化目标矢量的第二级量化。 存储在存储部分中的每个标量与存储在第一码本中的至少一个矢量相关联。
-
公开(公告)号：US08086450B2
公开(公告)日：2011-12-27
申请号：US12870122
申请日：2010-08-27
IPC分类号： G10L19/00
CPC分类号： G10L19/135 , G10L19/12 , G10L2019/0007 , G10L2019/0013
摘要： A code excited linear prediction type speech coder, which includes a seed storage that stores seeds used as an initial state of oscillation, and an oscillator that generates different vector sequences in accordance with values of the seeds stored in the seed storage and outputs the vector sequences as excitation vectors. The speech coder also includes a linear predictive coding synthesis filter that receives, as input, the excitation vectors, which are the vector sequences generated in accordance with the values of the seeds, that synthesizes the excitation vectors, and that outputs a synthesized speech.
摘要翻译： 代码激励线性预测型语音编码器，其包括存储用作振荡的初始状态的种子的种子存储器，以及根据存储在种子存储器中的种子的值生成不同矢量序列的振荡器，并输出矢量序列 作为激励矢量。 语音编码器还包括线性预测编码合成滤波器，其接收作为合成激励矢量并且输出合成语音的根据种子的值生成的矢量序列作为输入的激励矢量。
-
公开(公告)号：US07499854B2
公开(公告)日：2009-03-03
申请号：US11281386
申请日：2005-11-18
IPC分类号： G10L19/12
CPC分类号： G10L19/10 , G10L19/107 , G10L19/12
摘要： A code excited linear prediction speech decoder is provided. An adaptive codebook generates an adaptive code vector. A random codebook generates a random code vector. A synthesis filter receives a signal based on the adaptive code vector and the random code vector, and performs linear prediction coefficient synthesis on the signal. The random codebook includes a pulse vector provider that provides a pulse vector having a signed unit pulse, a comparator that compares a value of adaptive codebook gain with a preset threshold value, a selector that selects a dispersion pattern from a plurality of dispersion patterns stored in a memory in accordance with a result of the comparison, and a generator that generates the dispersed vector by convoluting the pulse vector and the selected dispersion pattern.
摘要翻译： 提供码激励线性预测语音解码器。 自适应码本生成自适应码矢量。 随机码本生成随机码矢量。 合成滤波器基于自适应码矢量和随机码矢量接收信号，对信号进行线性预测系数合成。 随机码本包括提供具有有符号单位脉冲的脉冲矢量的脉冲矢量提供器，将自适应码本增益值与预设阈值进行比较的比较器，选择器，其从存储在 根据比较结果的存储器，以及通过卷积脉冲矢量和所选色散图案来生成分散矢量的发生器。
-
-
-
-
-
-
-
-
-
搜索结果
157 条记录 (耗时 0.039 秒)
