公开(公告)号：US5226085A

公开(公告)日：1993-07-06

申请号：US779310

申请日：1991-10-18

Applicant: Renaud Di Francesco

Inventor： Renaud Di Francesco

IPC: G10L19/12 ,  H04B14/04

CPC classification number: G10L19/083 ,  G10L19/12

Abstract: A method is provided for transmitting a digital speech signal at low throughput. Coding is performed by code excited linear prediction in order to generate a code signal, a waveform being represented by an initial vector (O) of dimension L, from a filter for synthesizing by a reference waveform selected from a dictionary of reference vectors (v), relating to a criterion of minimum deviation min .parallel..chi.-H.v.parallel..sup.2, .chi. representing a target vector through perceptual weighting of the initial vector (O). A dictionary (Y) factorized as a product of basis vectors yi of n-ary form, which are corrected by a scale factor .gamma.i of distribution of the excitation energy, and a dictionary G(y) of gains gk, are established to represent the dictionary of the reference vectors (v), vk, i=gk..gamma..yi. The criterion is established by calculating C(gk, .gamma.i.yi)=2gk -gk.sup.2 formed of the scalar products and perceptual energies. To the initial vector (O) is assigned the optimal reference vector vk*, i*=gk*..gamma.i.yi represented by just the index values k*, i*.

Abstract translation: 提供一种用于以低吞吐量发送数字语音信号的方法。 通过代码激励线性预测执行编码，以便从用于由参考矢量（v）的字典中选择的参考波形合成的滤波器生成代码信号，波形由尺寸为L的初始向量（O）表示， ，与最小偏差标准最小值PARALLEL chi -Hv PARALLEL 2，chi通过初始向量（O）的感知加权表示目标向量。 将由因子分解的比例因子γi和增益gk的词G（y）校正的n元形式的基矢量yi的乘积的词典（Y）建立为表示 参考矢量（v），vk，i = gk的字典。 伽马。 该标准是通过计算C（gk，gamma i.yi）= 2gk -gk2由标量产物和感知能量组成。 向初始向量（O）分配最优参考向量vk *，i * = gk *。 gamma i.yi仅由索引值k *，i *表示。