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11. 发明申请

WO1996011468A1 VECTOR ENCODING METHOD AND ENCODER/DECODER USING THE METHOD 审中-公开
标题翻译：使用方法的矢量编码方法和编码器/解码器
公开(公告)号：WO1996011468A1
公开(公告)日：1996-04-18
申请号：PCT/JP1995001989
申请日：1995-09-29
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION , KATAOKA, Akitoshi , IKEDO, Jotaro
发明人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
IPC分类号： G10L09/18
CPC分类号： H03M7/02 , G06T9/008 , G10L19/00 , G10L19/005 , G10L2019/0005 , G10L2019/0013 , G10L2019/0014 , H03M7/3082
摘要： Representative vectors z1j, z2j are selected from code books CB1, CB2, respectively, and are multiplied by weighting factors w1, w2 having the same number of dimensions as the representative vectors by multipliers 21, 22 to generate weighted representative vectors z1iw1, z2jw2, respectively. They are then combined in a summing circuit portion 3, and the combination of z1i, z2j is selected by a control circuit so that the distance between the resultant vector yij and an input signal vector X becomes minimal. The weighting factor vectors w1, w2 have their respective factors at mutually different element positions, and are selected so that the sum of diagonal matrixes having the elements of these vectors becomes some multiples of a unit matrix.
摘要翻译：代表矢量z1j，z2j分别从码本CB1，CB2中选择，并且乘以与乘法器21,22相同的与代表矢量相同的维数的加权因子w1，w2，分别产生加权代表矢量z1i1，z2jw2 。然后将它们组合在求和电路部分3中，并且通过控制电路选择z1i，z2j的组合，使得所得到的矢量y ij与输入信号矢量X之间的距离变得最小。加权因子向量w1，w2在各自的元素位置具有各自的因子，并且被选择为使得具有这些向量的元素的对角矩阵的和变为单位矩阵的某个倍数。

12. 发明申请

WO1992016930A1 SPEECH CODER AND METHOD HAVING SPECTRAL INTERPOLATION AND FAST CODEBOOK SEARCH 审中-公开
标题翻译：语音编码器和方法具有频谱插值和快速的代码库搜索
公开(公告)号：WO1992016930A1
公开(公告)日：1992-10-01
申请号：PCT/US1992001299
申请日：1992-02-20
申请人： CODEX CORPORATION
发明人： CODEX CORPORATION , YONG, Mei
IPC分类号： G10L09/10
CPC分类号： G10L19/083 , G10L19/12 , G10L2019/0012 , G10L2019/0014
摘要： A novel spectral interpolation and efficient excitation codebook search method developed for a Code-Excited Linear Predictive (CELP) speech coder is set forth. The interpolation is performed on an impulse response of the spectral synthesis filter. As the result of using this new set of interpolation parameters, the computations associated with an excitation codebook search in a CELP coder are considerably reduced. Furthermore, a coder utilizing this new interpolation approach provides noticeable improvement in speech quality coded at low bit-rates.

13. 发明申请

WO1992011627A2 SPEECH CODING 审中-公开
标题翻译：语音编码
公开(公告)号：WO1992011627A2
公开(公告)日：1992-07-09
申请号：PCT/GB1991002291
申请日：1991-12-20
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , FREEMAN, Daniel, Kenneth , WONG, Wing-Tak-Kenneth , DAVIS, Andrew, Gordon
发明人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
IPC分类号： G10L09/14
CPC分类号： G10L19/083 , G10L19/12 , G10L2019/0013 , G10L2019/0014
摘要： In a codebook excited speech coder, speech is analysed (200) to produce coefficients of a synthesis filter and (203, 204) the parameters of a long-term prediction filter (LTP) and a codeword indication one of a set of excitations (stored in 205), the results being transmitted to a receiver where they can be used to resynthesise the speech. The LTP and excitation analysis involve computation (224) of impulse response products (stored in 301, 302). Computation of new products is performed by adding additional terms to products already formed. Multiplication of these products by excitation terms is performed using a pointer table (303) storing precalculated addresses of locations in the store (301, 302). If some excitations are shifted versions of others, some addressed can be obtained by modifying other addresses. The LTP analysis (203) may include selection between a simple delay prediction and a prediction consisting of the sum of two differently delayed terms, to provide improved predictor delay resolution.
摘要翻译：在由“字典”激励的语音编码器中，语音信号被分析（200）以产生合成滤波器的系数和（203,204）长期预测滤波器（LTP）的参数。）和构成一组激励（在205处存储）的激励之一的码字指示，结果被发送到接收机，在那里它们可以用于语音信号的新合成。 LTP和激励分析包括脉冲响应产品（存储在301和302）的计算（224）。新产品的计算方法是在已形成的产品中增加附加条款。通过激励项乘以这些乘积是使用存储先前计算的存储位置地址（301,302）的指示表（303）来执行的。当某些激励是其他激励的偏移版本时，某些地址可以通过修改其他地址来获得。 LTP分析（203）可以包括在简单延迟预测和包括具有不同延迟的两个项的相加之和的预测之间的选择，这提供了预测器延迟的改善的分辨率。

14. 发明申请

WO1992005541A1 VOICE CODING SYSTEM 审中-公开
标题翻译：语音编码系统
公开(公告)号：WO1992005541A1
公开(公告)日：1992-04-02
申请号：PCT/JP1991001235
申请日：1991-09-17
申请人： FUJITSU LIMITED , TANIGUCHI, Tomohiko , JOHNSON, Mark , OHTA, Yasuji , KURIHARA, Hideaki , TANAKA, Yoshinori , SAKAI, Yoshihiro
发明人： FUJITSU LIMITED
IPC分类号： G10L09/18
CPC分类号： G10L19/12 , G10L25/06 , G10L2019/0002 , G10L2019/0007 , G10L2019/0013 , G10L2019/0014
摘要： A voice coding system which finds by evaluation operation a code vector that minimizes the error between an input voice signal and a reproduced signal obtained through a linear estimation synthesis filtering simulating the vocal tract characteristics for each of the code vectors successively read out from a code book that stores a plurality of noise sequences as code vectors (C0, C1, C2 ....), and then encodes the input voice signal by using a code which specifies a code vector. The code book is constituted as a delta vector code book (11) that stores the initial vector (C0) and a plurality of delta vectors ( DELTA Ci) which consist of differential vectors among the neighboring code vectors. Operation means for the evaluation operation is provided with a cyclic adder means (20) which accumulates delta vectors for virtual reproduction of said code vectors (C0, C1, C2, ....).

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