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1.发明公开METHOD FOR ENCODING SOUND SOURCE OF PROBABILISTIC CODE BOOK 审中-公开方法ZUR KODIERUNG EINER TONQUELLE MIT EINEM PROBABILISTISCHEM CODE-BUCH
公开(公告)号：EP1548706A1
公开(公告)日：2005-06-29
申请号：EP03811104.3
申请日：2003-11-11
发明人： MORII, Toshiyuki
IPC分类号： G10L19/12
CPC分类号： G10L19/12 , G10L2019/0004
摘要： A stochastic codebook 103 associates a pulse position of a predetermined channel with a pulse position of another channel, searches for a pulse position by means of a predetermined algorithm, and outputs a code combining a found pulse position with a polarity code to an excitation vector creation section 104 as a stochastic excitation vector code. By this means, it is possible to secure variations so that there are no positions where there is no pulse at all while achieving a reduction of the number of bits used when coding stochastic codebook pulses in order to attain a lower bit rate.
摘要翻译： 随机码本103将预定信道的脉冲位置与另一信道的脉冲位置相关联，通过预定算法搜索脉冲位置，并将找到的脉冲位置与极性码组合的代码输出到激励矢量创建 部分104作为随机激励矢量代码。 通过这种方式，可以确保变化，使得在编码随机码本脉冲的同时实现减少使用的位数，从而没有完全没有脉冲的位置，以便获得较低的比特率。
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公开(公告)号：EP0883107B1
公开(公告)日：2004-08-18
申请号：EP97911460.0
申请日：1997-11-06
IPC分类号： G10L19/12
CPC分类号： G10L19/135 , G10L19/12 , G10L2019/0007 , G10L2019/0013
摘要： In a CELP type speech coder, the excitation is quantized by vectors from a random codebook. The random codebook is made of a fixed waveform storage section (181), followed by a vector rearranging unit (182). The rearranging section (182) shifts the vectors to positions determined to minimize the quantization distorsion using a pulse placement methodology of an algebraic coder. The vectors are summed (183) to generate the excitation code vector.
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公开(公告)号：EP0858069B1
公开(公告)日：2006-11-29
申请号：EP97933895.1
申请日：1997-08-04
发明人： EHARA, Hiroyuki , MORII, Toshiyuki
IPC分类号： G10L19/12
CPC分类号： G10L19/12 , G10L2019/0005
摘要： The present invention intends to enhance a sound quality of a sound source generating portion in a CELP type voice encoding device and a CELP type voice decoding device. A pitch peak position of an adaptive code vector is obtained by a pitch peak position calculator, a window for emphasizing an amplitude of the pitch peak position is prepared by an amplitude emphasizing window generator (13), and an amplitude of a noise code vector corresponding to the pitch peak position is emphasized by an amplitude emphasizing window unit (16).
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公开(公告)号：EP0967594A1
公开(公告)日：1999-12-29
申请号：EP98950336.2
申请日：1998-10-22
CPC分类号： G10L19/10 , G10L19/107 , G10L19/12
摘要： An excitation vector generator comprises a pulse vector generating section having N channels (N≧1) for generating pulse vectors, a storing section for storing M (M≧1)kinds of dispersion patterns every channel in accordance with N channels, a selecting section for selectively taking out a dispersion pattern from the storing section every channel, a dispersion section for performing a superimposing calculation of the extracted dispersion pattern and the generated pulse vectors every channel so as to generate N dispersion vectors, excitation vector generating section for generating an excitation vector from N dispersion vectors generated.
摘要翻译： 一个激励矢量发生器包括一个具有用于产生脉冲矢量的N个通道（N> / = 1）的脉冲矢量产生部分，一个根据N个通道每个通道存储M（M> / = 1）种色散模式的存储部分， 选择部分，用于从每个通道的存储部分选择性地取出色散图案，分散部分，用于执行所提取的色散图案的叠加计算和每个通道的产生的脉冲矢量，以产生N个色散矢量;激励矢量生成部分，用于 从产生的N个色散向量生成激励矢量。
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公开(公告)号：EP0967594B1
公开(公告)日：2006-12-13
申请号：EP98950336.2
申请日：1998-10-22
IPC分类号： G10L19/10
CPC分类号： G10L19/10 , G10L19/107 , G10L19/12
摘要： A speech coding method and a speech coder operating according to the code excited linear prediction paradigm. A random codevector is chosen using an orthogonalization search. Said search determines an optimum random excitation gain minimizing a distortion function. The denominator of the gain function is determined using preprocessed matrices determined in advance and depending on the adaptive codevector and synthesis filter matrix in order to reduce the amount of filtering operations during the search of the random codebook.
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6.发明公开PITCH CYCLE SEARCH RANGE SETTING DEVICE AND PITCH CYCLE SEARCH DEVICE 有权PITCH-CYCLE-SUCHBEREICHSEINSTELLEINRICHTUNG UND PITCH-CYCLE-SUCHEINRICHTUNG
公开(公告)号：EP1339043A1
公开(公告)日：2003-08-27
申请号：EP02751823.2
申请日：2002-08-01
CPC分类号： G10L19/09 , G10L19/125 , G10L25/90 , G10L2019/0002
摘要： An Adaptive Sound Source Vector Generator (ASSVG) 103 sets preceding and succeeding pitch cycles centered on an integral-accuracy pitch cycle T0 selected in the previous subframe as a range for searching for a fractional-accuracy pitch frequency, and extracts an adaptive sound source vector P(T-frac) that has fractional-accuracy pitch cycle T-frac within this range from an Adaptive Code Book (ACB) 102. A Last Sub Frame Integral Pitch Cycle Storage (LSFIPCS) 108 stores integral component T0 of the optimal pitch cycle selected by a Distortion Comparator (DC) 107, and when a pitch cycle of the next subframe is searched for, outputs this optimal pitch cycle integral component T0 to the Adaptive Sound Source Vector Generator (ASSVG) 103. An Optimal Pitch Cycle Accuracy Judge Section (OPCAJS) 109 judges whether the optimal pitch cycle is of integral accuracy or fractional accuracy. A Comparison Judge Section (CJS) 110 restricts the number of times fractional-accuracy pitch information is selected in an optimal pitch cycle.
摘要翻译： 自适应声源矢量发生器（ASSVG）103将前一个子帧中选择的积分精度音调周期T0的前后音调周期设置为搜索分数精度音调频率的范围，并提取自适应声源向量 在自适应码本（ACB）102的范围内具有分数精度音调周期T-frac的P（T-frac）。最后一个子帧积分间距周期存储（LSFIPCS）108存储最佳音调周期的积分分量T0 由失真比较器（DC）107选择，并且当搜索下一个子帧的音调周期时，将该最佳音调周期积分分量T0输出到自适应声源向量发生器（ASSVG）103。最佳音调周期精度判断部分 （OPCAJS）109判断最佳音调周期是否具有积分精度或分数精度。 比较判断部分（CJS）110限制在最佳音调周期中选择分数精度音调信息的次数。
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公开(公告)号：EP1132892A1
公开(公告)日：2001-09-12
申请号：EP00954908.0
申请日：2000-08-23
IPC分类号： G10L19/04
CPC分类号： G10L19/16 , G10L19/083 , G10L19/09
摘要： A vector codebook 1094 storing a plurality of typical samples of quantization target vectors is created. Each vector consists of three elements, which are values corresponding to logarithmic values of an AC gain and SC gain and an adjustment coefficient of SC prediction coefficient. Prediction coefficient storage section 1095 stores coefficients to perform predictive coding. These coefficients are MA prediction coefficients and a number of coefficients corresponding to the degree of prediction, of two types, AC and SC, are stored.
Parameter calculation section 1091 calculates parameters necessary for distance calculations from the input perceptual weighted input speech, perceptual weighted LPC synthesis of adaptive code vector, perceptual weighted LPC synthesis of stochastic code vector, further decoded vectors (AC, SC, adjustment coefficient) stored in decoded vector storage section 1096 and prediction coefficients (AC, SC) stored in prediction coefficient storage section 1095.摘要翻译： 创建存储量化目标矢量的多个典型样本的矢量码本1094。 每个矢量由三个元素组成，它们是对应于AC增益和SC增益的对数值以及SC预测系数的调整系数的值。 预测系数存储部1095存储执行预测编码的系数。 这些系数是MA预测系数，存储了与AC和SC两种类型的预测程度相对应的系数数。 参数计算部1091根据输入感知加权输入语音，自适应码矢量的感知加权LPC合成，随机码向量的感知加权LPC合成，存储在解码后的进一步解码矢量（AC，SC，调整系数）来计算距离计算所需的参数 矢量存储部1096和存储在预测系数存储部1095中的预测系数（AC，SC）
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8.发明授权PITCH CYCLE SEARCH RANGE SETTING DEVICE AND PITCH CYCLE SEARCH DEVICE 有权沥青和沥青SUCHBEREICHSEINSTELLEINRICHTUNG周期周期的搜索工具
公开(公告)号：EP1339043B1
公开(公告)日：2008-01-09
申请号：EP02751823.2
申请日：2002-08-01
CPC分类号： G10L19/09 , G10L19/125 , G10L25/90 , G10L2019/0002
摘要： An Adaptive Sound Source Vector Generator (ASSVG) 103 sets preceding and succeeding pitch cycles centered on an integral-accuracy pitch cycle T0 selected in the previous subframe as a range for searching for a fractional-accuracy pitch frequency, and extracts an adaptive sound source vector P(T-frac) that has fractional-accuracy pitch cycle T-frac within this range from an Adaptive Code Book (ACB) 102. A Last Sub Frame Integral Pitch Cycle Storage (LSFIPCS) 108 stores integral component T0 of the optimal pitch cycle selected by a Distortion Comparator (DC) 107, and when a pitch cycle of the next subframe is searched for, outputs this optimal pitch cycle integral component T0 to the Adaptive Sound Source Vector Generator (ASSVG) 103. An Optimal Pitch Cycle Accuracy Judge Section (OPCAJS) 109 judges whether the optimal pitch cycle is of integral accuracy or fractional accuracy. A Comparison Judge Section (CJS) 110 restricts the number of times fractional-accuracy pitch information is selected in an optimal pitch cycle.
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公开(公告)号：EP0883107B9
公开(公告)日：2005-01-26
申请号：EP97911460.0
申请日：1997-11-06
IPC分类号： G10L19/12
CPC分类号： G10L19/135 , G10L19/12 , G10L2019/0007 , G10L2019/0013
摘要： In a CELP type speech coder, the excitation is quantized by vectors from a random codebook. The random codebook is made of a fixed waveform storage section (181), followed by a vector rearranging unit (182). The rearranging section (182) shifts the vectors to positions determined to minimize the quantization distorsion using a pulse placement methodology of an algebraic coder. The vectors are summed (183) to generate the excitation code vector.
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公开(公告)号：EP1002237A1
公开(公告)日：2000-05-24
申请号：EP99923967.6
申请日：1999-06-08
IPC分类号： G01R23/16
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.
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