公开(公告)号：US4385393A

公开(公告)日：1983-05-24

申请号：US253159

申请日：1981-04-10

申请人： Christian Chaure ,  Albert Benveniste ,  Andre Gilloire

发明人： Christian Chaure ,  Albert Benveniste ,  Andre Gilloire

IPC分类号： H03M3/04 ,  H03M7/38 ,  H04B14/06 ,  H04B12/04

CPC分类号： H03M3/042

摘要： A coding process for the adaptive prediction differential PCM type. An error signal e.sub.t is formed between a sample of signal y.sub.t to be coded and a prediction signal p.sub.t of said signal. The prediction signal p.sub.t is formed from restored signals y.sub.t and e.sub.t by two linear filtering operations, the first relating to N successive samples of y.sub.t and using coefficients A1.sub.t, A2.sub.t, . . . , AN.sub.t and the second relating to P successive samples of e.sub.t and using coefficients B1.sub.t, B2.sub.t, . . . , BP.sub.t, the coefficients A1.sub.t, A2.sub.t, . . . , AN.sub.t and B1.sub.t, B2.sub.t, . . . , BP.sub.t being sequentially adjusted at each time t so that the mean power of error signal e.sub.t is minimal. Instead of carrying out the prediction on the basis of signals y.sub.t and e.sub.t only according to the invention, use is also made of the real signal y.sub.t and the real error e.sub.t. A linear filtering of y.sub.t using the coefficients A1.sub.t, A2.sub.t, . . . , AN.sub.t, these coefficients affecting N successive samples of the signal y.sub.t, a linear filtering of e.sub.t using the coefficients B1.sub.t, B2.sub.t, . . . , BP.sub.t are performed. In addition, the quantities thus obtained are respectively weighted by two coefficients between 0 and 1 and not simultaneously zero.

摘要翻译： 用于自适应预测差分PCM类型的编码过程。 在要编码的信号yt的采样和所述信号的预测信号pt之间形成误差信号等。 预测信号pt由恢复的信号yt和et由两个线性滤波操作形成，第一个与nt的连续样本相关，并且使用系数A1t，A2t。 的。 的。 ANt，第二个涉及et的P个连续样本，并使用系数B1t，B2t，...。 的。 的。 ，BPt，系数A1t，A2t，。 的。 的。 ，ANt和B1t，B2t，。 的。 的。 BPt在每个时间t被顺序地调整，使得误差信号等的平均功率最小。 代替根据本发明的基于信号yt和et的执行预测，也可以使用实际信号yt和实际误差等。 使用系数A1t，A2t，...进行线性滤波。 的。 的。 ANt，这些系数影响信号yt的N个连续样本，使用系数B1t，B2t的线性滤波。 的。 的。 ，执行BPt。 另外，这样获得的量分别由0和1之间的两个系数加权而不是同时为零。

公开(公告)号：US6122609A

公开(公告)日：2000-09-19

申请号：US93740

申请日：1998-06-08

申请人： Pascal Scalart ,  Andre Gilloire

发明人： Pascal Scalart ,  Andre Gilloire

IPC分类号： G10L21/04 ,  G10L13/00 ,  H03H21/00 ,  H04B3/23 ,  H04M1/60 ,  H04R3/00 ,  H04R29/00 ,  G10L21/00

CPC分类号： H04R29/00 ,  H04R3/00

摘要： A method and a device adapted to hands-free mobile radiotelephony for the optimized processing of a disturbing signal during a sound capture, on the basis of an observation signal y(t) formed of an original useful signal s(t) and of this disturbing signal p(t), the disturbing signal is estimated as a signal p(t) and the useful signal as an estimated useful signal su. An optimal filtering of the observation signal y(t) is carried out on the basis of the signal p(t) and of a minimizing of the error e(su,su) between the useful signal su and the estimated useful signal su. The estimated useful signal su and the useful signal converge towards the original useful signal s(t) for a substantially zero error e(su,su).

摘要翻译： 基于由原始有用信号s（t）形成的观测信号y（t）和这种干扰的方法和装置，适用于免提移动无线电话，用于在声音捕获期间对干扰信号进行优化处理 信号p（t），扰动信号被估计为信号+ E，cir p + EE（t），有用信号被估计为估计有用信号+ E，cir s + EE u。 基于信号+ E，cir p + EE（t）和最小化误差e（su，+ E，cir s + EE u）来进行观测信号y（t）的最优滤波， 在有用信号su和估计有用信号+ E，cir s + EE u之间。 对于基本为零误差e（su，+ E，cir s + EE u），估计的有用信号+ E，cir s + EE u和有用信号朝着原始有用信号s（t）收敛。

公开(公告)号：US4319082A

公开(公告)日：1982-03-09

申请号：US103582

申请日：1979-12-14

申请人： Andre Gilloire ,  Jean Zurcher

发明人： Andre Gilloire ,  Jean Zurcher

IPC分类号： H03M3/04 ,  H04B1/66 ,  H04B14/06 ,  G10L1/00

CPC分类号： H04B14/068 ,  H03M3/042 ,  H04B1/667

摘要： Adaptive differential PCM system using both adaptive quantization and adaptive prediction. The adaptive prediction is carried out in adjacent frequency bands on as many signals as are obtained by weighting the quantized signal by coefficients obtained by spectral analysis in the bands of the quantized signal.

摘要翻译： 自适应差分PCM系统使用自适应量化和自适应预测。 通过在量化信号的频带中通过频谱分析获得的系数对量化信号进行加权获得的信号，在相邻频带中进行自适应预测。

公开(公告)号：US4389726A

公开(公告)日：1983-06-21

申请号：US253154

申请日：1981-04-10

申请人： Alain Le Guyader ,  Andre Gilloire

发明人： Alain Le Guyader ,  Andre Gilloire

IPC分类号： H03H21/00 ,  H03M3/04 ,  H03M7/38 ,  H04B14/06 ,  H04L25/03 ,  H04B12/04

CPC分类号： H04L25/03038 ,  H03H21/0014 ,  H03M3/042

摘要： An adaptive predicting circuit comprises a lattice filter with N identical cells each having four accesses. The first and second accesses of a cell are respectively connected to the third and fourth accesses of the preceding cell. Each cell comprises a circuit with a delay of one sampling time and two multipliers each having two inputs, one receiving a signal and the other a multiplication coefficient k.sub.m (t). The coefficient k.sub.m (t) is supplied to the multipliers. The adaptive predicting circuit also comprises an adder having N inputs respectively connected to the N cells and one output supplying a prediction signal. The coefficient k.sub.m (t) is supplied by a circuit for the sequential adaptation of the coefficient k.sub.m (t) inherent to each cell. The adaptation circuit has four inputs respectively connected to the first access of the cell, to the output of the delay circuit, and to the third and fourth accesses.

摘要翻译： 一个自适应预测电路包括具有N个相同单元的格子滤波器，每个单元具有四个访问。 单元的第一和第二访问分别连接到前一单元的第三和第四访问。 每个单元包括具有一个采样时间的延迟的电路和两个具有两个输入的乘法器，一个接收信号，另一个乘法乘法系数km（t）。 系数km（t）被提供给乘法器。 自适应预测电路还包括具有分别连接到N个单元的N个输入和提供预测信号的一个输出的加法器。 系数km（t）由用于每个单元固有的系数km（t）的顺序适应的电路提供。 适配电路具有分别连接到小区的第一接入，延迟电路的输出和第三和第四接入的四个输入。

公开(公告)号：US4956838A

公开(公告)日：1990-09-11

申请号：US322947

申请日：1989-03-14

申请人： Andre Gilloire ,  Martin Vetterli

发明人： Andre Gilloire ,  Martin Vetterli

IPC分类号： H04B3/23 ,  H04M9/08

CPC分类号： H04B3/21 ,  H04B3/23 ,  H04M9/082 ,  H04B3/238

摘要： An echo cancelling device for use between a line receiving an incoming signal and a line transmitting an outgoing signal, for cancelling out echo, comprising a plurality of processing channels connected in parallel relation and assigned to successive mutually adjacent sub-bands of the spectral band of the outgoing signal, each channel having: a first analysis band-pass filter receiving the echo-affected signal to be transmitted, whose output is connected to the additive input of a subtractor; a second analysis band-pass filter, identical to the first filter, receiving the incoming signal and feeding an adaptive filter delivering an estimated echo value in the sub-band to the subtractive input of the subtractor; and a synthesis filter, symmetrical with the analysis filters and whose output feeds the transmission line. Each processing channel receives an estimation of the aliasing component originating from another sub-band at least and that component is eliminated by adding it to the signal originating from the filter analyzing the respective incoming signal. Estimation may be made by synthesis using at least one adaptive cross-filter fed by the output of an adjacent channel.

摘要翻译： 一种用于在接收输入信号的线路和发送输出信号的线路之间使用的用于消除回波的回波消除装置，包括以并行关系连接并被分配给频谱带的连续相互相邻的子带的多个处理信道 每个信道具有：接收要发送的回波影响信号的第一分析带通滤波器，其输出连接到减法器的加法输入; 第二分析带通滤波器，与第一滤波器相同，接收输入信号并馈送将子带中的估计回波值传送到减法器的减法输入端的自适应滤波器; 以及与分析滤波器对称的合成滤波器，其输出馈送传输线。 每个处理通道至少接收来自另一个子带的混叠分量的估计，并且通过将该分量加到分析各个输入信号的滤波器的信号中来消除该分量。 可以通过使用由相邻信道的输出馈送的至少一个自适应交叉滤波器进行合成来进行估计。