公开(公告)号：US5487064A

公开(公告)日：1996-01-23

申请号：US251073

申请日：1994-05-31

申请人： Claude Galand ,  Gerald Lebizay

发明人： Claude Galand ,  Gerald Lebizay

IPC分类号： G06F13/00 ,  H04L29/06 ,  H04L12/56

CPC分类号： H04L29/06

摘要： A packet switching communication system is improved by using a packet header structure which does not require a fixed format. The packet header comprises a chain of 2 byte command/data segments. Each command/data segment contains generic bits and a routing field. One of the generic bits (bit 1) allows the header to be extended with another command/data segment.

摘要翻译： 通过使用不需要固定格式的分组报头结构来改进分组交换通信系统。 分组报头包括2字节命令/数据段链。 每个命令/数据段包含通用位和路由字段。 通用位之一（位1）允许使用另一个命令/数据段扩展头。

公开(公告)号：US5359593A

公开(公告)日：1994-10-25

申请号：US112736

申请日：1993-08-26

申请人： Jeffrey H. Derby ,  John E. Drake, Jr. ,  Claude Galand ,  Levent Gun ,  Gerald A. Marin ,  Allen L. Roginsky ,  Theodore E. Tedijanto

发明人： Jeffrey H. Derby ,  John E. Drake, Jr. ,  Claude Galand ,  Levent Gun ,  Gerald A. Marin ,  Allen L. Roginsky ,  Theodore E. Tedijanto

IPC分类号： H04Q3/00 ,  H04L12/56 ,  H04J3/14

CPC分类号： H04L12/5602 ,  H04L43/0829 ,  H04L43/0894 ,  H04L2012/5632 ,  H04L2012/5635 ,  H04L2012/5636 ,  H04L2012/5637 ,  H04L2012/5651

摘要： Access control for a packet communications network includes a dynamic bandwidth updating mechanism which continuously monitors the mean bit rate of the signal source and the loss probability of the connection. These values are filtered to remove noise and then used to test whether the values fall within a pre-defined acceptable adaptation region in the mean bit rate, loss probability plane. Values falling outside of this region trigger bandwidth updating procedures which, in turn, result in acquiring a new connection bandwidth, and determining new filter parameters and new parameters for a leaky bucket access mechanism.

摘要翻译： 分组通信网络的访问控制包括动态带宽更新机制，其连续监视信号源的平均比特率和连接的丢失概率。 对这些值进行滤波以去除噪声，然后用于测试值是否落在平均位速率丢失概率平面内的预定义的可接受适应区域内。 落在该区域之外的值触发带宽更新过程，这又导致获得新的连接带宽，并且确定用于泄漏桶访问机制的新的过滤器参数和新参数。

公开(公告)号：US5142583A

公开(公告)日：1992-08-25

申请号：US522710

申请日：1990-05-14

申请人： Claude Galand ,  Jean Menez

发明人： Claude Galand ,  Jean Menez

IPC分类号： G10L13/00 ,  G10L19/04 ,  G10L19/08

CPC分类号： G10L19/08 ,  G10L19/04

摘要： A vector quantizing speech coder includes a Short-Term-Predictive filter which receives originally sampled speech signal s(n) and decorrelates it into a residual signal r(n). A device is provided to quantize the residual signal r(n) at a low bit rate. The device also generates a reconstructed signal r(n) from which coefficients for adjusting the Short-Term-Predictive filter are dynamically derived.

摘要翻译： 矢量量化语音编码器包括短期预测滤波器，其接收原始采样的语音信号s（n）并将其解相关到残差信号r（n）中。 提供了一种以低比特率量化剩余信号r（n）的装置。 该装置还生成重建信号r（n），从该信号r（n）中动态地导出用于调整短期预测滤波器的系数。

公开(公告)号：US5054025A

公开(公告)日：1991-10-01

申请号：US185670

申请日：1988-04-25

申请人： Claude Galand ,  Philippe Elie ,  Michele Rosso

发明人： Claude Galand ,  Philippe Elie ,  Michele Rosso

IPC分类号： H03M13/00 ,  H03M7/30 ,  H03M13/09

CPC分类号： H03M13/09 ,  H03M13/098 ,  H03M7/3053

摘要： Some signal coding techniques involve quantizing the signal samples using a signal derived parameter to set the quantizer step. This parameter is then used in the decoding process to synthesize the original signal back to its analog form. Any error affecting the integrity of said parameter, between coding and decoding, would affect the synthesized signal. The method proposed here for protecting data integrity involves, at the encoding site, forcing the parameter to a fixed parity. Then, before synthesizing operations are performed, any parameter failing a parity control test is discarded and replaced with a parameter derived from available valid parameter(s).

公开(公告)号：US4965789A

公开(公告)日：1990-10-23

申请号：US320146

申请日：1989-03-07

申请人： Francoise Bottau ,  Claude Galand ,  Michele Rosso

发明人： Francoise Bottau ,  Claude Galand ,  Michele Rosso

IPC分类号： G10L19/06 ,  G10L19/12

CPC分类号： G10L19/12 ,  G10L19/06 ,  G10L19/24 ,  G10L25/06

摘要： The voice signal s(n) is filtered through a short-term predictive filter (13) tuned with PARCOR derived coefficients computed over a pre-emphasized s(n), said filter (13) providing a short-term residual r(n). Said r(n) signal is then processed through a first Cod-Excited/Long-Term Predicative coder providing first couples of table address and gain data (k1, gl)'s. An error signal r'(n) is then derived by subtracting coded/decoded data from uncoded data. Then said error signal is processed through a second Code-Excited/Long-Term Predictive coder providing second couples of data (k2, g2)'s. Full rate coding is achieved by multiplexing both couples (k1, gl)'s and (k2, g2)'s into a multi-rate frame; while switching to a lower rate is achieved through a mere delation of (g2, k2)'s from the full rate frame.

公开(公告)号：US4933957A

公开(公告)日：1990-06-12

申请号：US320192

申请日：1989-03-07

申请人： Francoise Bottau ,  Claude Galand ,  Jean Menez ,  Michele Rosso

发明人： Francoise Bottau ,  Claude Galand ,  Jean Menez ,  Michele Rosso

IPC分类号： G10L19/06 ,  G10L19/12 ,  H03M7/30

CPC分类号： G10L19/12 ,  G10L19/06 ,  G10L25/06 ,  G10L25/09

摘要： This low bit rate voice encoding involves short-term predictive filtering the voice signal s(n) using partial correlation related coefficients derived from pre-emphasized s(n), and deriving a short term signal r(n); then deriving a long-term residual signal e(n) by subtracting a delayed synthesized short term b.r'(n-31 M) from said r(n); and code excited encoding e(n) into codeword references k's and associated gains G's.

公开(公告)号：US4751730A

公开(公告)日：1988-06-14

申请号：US856265

申请日：1986-04-28

申请人： Claude Galand ,  Guy Platel

发明人： Claude Galand ,  Guy Platel

IPC分类号： H04B3/20 ,  H04B3/23

CPC分类号： H04B3/23

摘要： This process enables cancelling residual echo signals in a transmission system wherein echo signals are partially cancelled through use of a filter generating an echo replica, and substracting said replica from the signal in the echo path. The process involves measuring energies of incoming and outgoing signals, comparing the ratio of said energies to a predetermined threshold value to generate a flag information, which flag is used to control a switch on the echo path. The threshold is determined, for instance by using the information provided by the echo path impulse response not considered for the generation of the echo replica.

摘要翻译： 该过程能够消除传输系统中的残余回波信号，其中通过使用产生回波复制品的滤波器部分地消除回波信号，并且从回波路径中的信号中减去所述副本。 该过程包括测量进入和输出信号的能量，将所述能量的比率与预定阈值进行比较以产生标志信息，该标志用于控制回波路径上的开关。 确定阈值，例如通过使用由回波路径脉冲响应提供的信息而不考虑用于生成回波复制品。

公开(公告)号：US4589130A

公开(公告)日：1986-05-13

申请号：US458796

申请日：1983-01-18

申请人： Claude Galand

发明人： Claude Galand

IPC分类号： G10L13/00 ,  G10L19/00 ,  H03M7/30 ,  H04B1/66 ,  H04B14/04 ,  H04J3/17 ,  H04J3/22

CPC分类号： H04B1/667 ,  G10L19/00

摘要： In a TASI system using dynamic subband allocation and BCPCM (Block Companded PCM), losses due to freeze-out or delay are avoided by use of a multi-rate macro-frame format, wherein switching to a lower rate (24, 16, or 8 Kbs) for one or more of the input channels is accommodated by simply dropping one or more sections of each signal frame, since the lower rate bits are distributed over the entire frame.

摘要翻译： 在使用动态子带分配和BCPCM（块压缩PCM）的TASI系统中，通过使用多速率宏帧格式来避免由于冻结或延迟引起的损失，其中切换到较低速率（24,16或 通过简单地放弃每个信号帧的一个或多个部分来容纳一个或多个输入信道，因为较低速率比特分布在整个帧上。