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    Method and apparatus for coding digital data using vector quantizing techniques
    3.
    发明授权
    Method and apparatus for coding digital data using vector quantizing techniques 失效
    使用矢量量化技术对数字数据进行编码的方法和装置

    公开(公告)号：US5444488A

    公开(公告)日：1995-08-22

    申请号：US77009

    申请日：1993-06-15

    申请人： Eric Goubault ,  Emmanuel Lancon ,  Jean Menez ,  Catherine Raimondo

    发明人： Eric Goubault ,  Emmanuel Lancon ,  Jean Menez ,  Catherine Raimondo

    IPC分类号： G06T9/00 ,  H03M7/30 ,  H04N7/28

    CPC分类号： G06T9/008 ,  H03M7/3082 ,  H04N19/94

    摘要： A vector quantization encoder comprises a codebook built with the so-called Linde-Buzo-Gray (LBG) algorithm, an intermediary codebook built from the initial codebook (LBG) and a Hash-table containing subsets of the initial codebook (LBG). Vector quantization is then performed in two steps. First, a multistep prequantization of an input vector gives an index in the Hash-table which points to a subset of vectors of the initial codebook (LBG). Then a full search is performed within the pointed subset of vectors of the initial codebook (LBG).

    摘要翻译： 矢量量化编码器包括由所谓的林德 - 布佐灰色（LBG）算法构建的码本，由初始码本（LBG）构建的中间码本和包含初始码本（LBG）子集的散列表。 然后在两个步骤中执行矢量量化。 首先，输入向量的多步预量化给出了指向初始码本（LBG）的向量子集的哈希表中的索引。 然后在初始码本（LBG）的向量的指向子集内执行完全搜索。

    Adaptive echo cancellation method and device for implementing said method
    4.
    发明授权
    Adaptive echo cancellation method and device for implementing said method 失效
    自适应回波消除方法及其实现方法

    公开(公告)号：US5351291A

    公开(公告)日：1994-09-27

    申请号：US927690

    申请日：1992-08-07

    申请人： Jean Menez ,  Michele Rosso ,  Paolo Scotton

    发明人： Jean Menez ,  Michele Rosso ,  Paolo Scotton

    IPC分类号： H03H15/00 ,  H03H17/00 ,  H03H21/00 ,  H04B3/23 ,  H04M9/00

    CPC分类号： H04B3/237

    摘要： The echo cancellation method includes starting with an arbitrary set of echo filter coefficients. The coefficients are first sequentially re-estimated using a fast converging method.These operations are repeated a predefined number of times, and then the coefficients estimation is switched to a low converging but more precise method. In addition, an adaptive threshold is being defined and readjusted and all filter coefficients lower than said threshold are being discarded.Finally, sampling time boundaries are adaptively defined based on non-discarded filter coefficients with reference to said threshold, and in such a way the final echo cancellation algorithm is adaptive to echo variations (backtracking algorithm).

    摘要翻译： 回波消除方法包括以任意的一组回波滤波器系数开始。 首先使用快速收敛方法连续重新估计系数。 这些操作重复预定次数，然后将系数估计切换到低收敛但更精确的方法。 此外，正在定义和重新调整自适应阈值，并且正在丢弃低于所述阈值的所有滤波器系数。 最后，参考所述阈值，基于非丢弃的滤波器系数自适应地定义采样时间边界，并且以这种方式，最终回波消除算法适应于回波变化（回溯算法）。

    System for coding voice signals to optimize bandwidth occupation in high speed packet switching networks
    5.
    发明授权
    System for coding voice signals to optimize bandwidth occupation in high speed packet switching networks 失效
    用于编码语音信号的系统，以优化高速分组交换网络中的带宽占用

    公开(公告)号：US6104998A

    公开(公告)日：2000-08-15

    申请号：US213505

    申请日：1998-12-17

    申请人： Claude Galand ,  Gerald Lebizay ,  Jean Menez ,  Bernard Pucci ,  Gerard Richter ,  Michele Rosso

    发明人： Claude Galand ,  Gerald Lebizay ,  Jean Menez ,  Bernard Pucci ,  Gerard Richter ,  Michele Rosso

    IPC分类号： G10H1/00 ,  G10H1/053 ,  G10H1/26 ,  H04J3/22 ,  G10L19/08

    CPC分类号： G10H1/26 ,  G10H1/0066 ,  G10H2230/201 ,  G10H2240/251

    摘要： A system for coding voice signal to optimize bandwidth occupation in a High Speed Packet Switching network while ensuring best voice transmission quality.The voice signal is first encoded using a conventional GSM like RPE/LTP coder providing first sub-frames of coded signal and tagging these first sub-frames as being non-discardable. In addition, a convenient difference between an RPE/LTP provided signal and a corresponding synthesized image is performed (see 36) and is also block encoded into second sub-frames which second sub-frames are tagged as being discardable sub-frames. Said second sub-frames when concatenated to corresponding first sub-frames provide so-called multirate frames. Then, when transmitting said multirate frames over the High Speed packet switching network, dropping discardable tagged data enables solution network congestion situations in any network node and at random with no significant disturbing effect over the voice communication operation.

    摘要翻译： 一种用于编码语音信号的系统，以优化高速分组交换网络中的带宽占用，同时确保最佳语音传输质量。 语音信号首先使用传统的GSM，如RPE / LTP编码器进行编码，提供编码信号的第一子帧，并将这些第一子帧标记为不可丢弃。 此外，执行RPE / LTP提供的信号和对应的合成图像之间的方便的差异（参见36），并且也被块编码成第二子帧，其中第二子帧被标记为可丢弃的子帧。 当连接到对应的第一子帧时，所述第二子帧提供所谓的多速率帧。 然后，当通过高速分组交换网络发送所述多速率帧时，丢弃可丢弃的标记数据使任何网络节点中的解决方案网络拥塞情况随机地在语音通信操作上无明显的干扰效应。

    Low-delay low-bit-rate speech coder
    6.
    发明授权
    Low-delay low-bit-rate speech coder 失效
    低延迟低比特率语音编码器

    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。

    Transmission system of telephony circuits over a packet switching network
    8.
    发明授权
    Transmission system of telephony circuits over a packet switching network 失效
    通过分组交换网络的电话电路的传输系统

    公开(公告)号：US6157637A

    公开(公告)日：2000-12-05

    申请号：US10004

    申请日：1998-01-21

    申请人： Claude Galand ,  Gerald Lebizay ,  Jean Menez ,  Gerard Richter

    发明人： Claude Galand ,  Gerald Lebizay ,  Jean Menez ,  Gerard Richter

    IPC分类号： H04L12/70 ,  H04Q11/04 ,  H04L12/66 ,  H04B1/66 ,  H04J3/00

    CPC分类号： H04Q11/0478 ,  H04L2012/5663 ,  H04L2012/5671 ,  H04Q2213/13034 ,  H04Q2213/13103 ,  H04Q2213/13164 ,  H04Q2213/13166 ,  H04Q2213/13196 ,  H04Q2213/13216 ,  H04Q2213/1322 ,  H04Q2213/1329

    摘要： Process for transmitting compressed voice circuits over a packet switching network of the type comprising a plurality of switching nodes (SW-1 to SW-7) interconnected by connection lines and including at least an end switching node (SW-1) connected to a source exchange telephone device (PABX A) and another end switching node (SW-3) connected to a destination exchange telephone device (CX), and comprising the steps of receiving from the source exchange telephone device a sequence of uncompressed frames wherein each frame contains n slots containing each J bytes respectively associated to J voice circuits, compressing the data bits of each voice circuit in order to build a packet containing J compressed voice circuits, and providing this packet to the end switching node for transmission to the destination exchange telephone device.

    摘要翻译： 用于通过包括通过连接线互连并包括至少连接到源的端交换节点（SW-1）的多个交换节点（SW-1至SW-7）的类型的分组交换网络来发送压缩语音电路的过程 交换电话设备（PABX A）和连接到目的地交换电话设备（CX）的另一终端交换节点（SW-3），并且包括以下步骤：从源交换电话设备接收一系列未压缩帧，其中每个帧包含n 包含分别与J个语音电路相关联的每个J字节的时隙，压缩每个语音电路的数据位，以构建包含J个压缩语音电路的数据包，并将该数据包提供给终端交换节点以传输到目的地交换电话设备。

    Voice coding process and device for implementing said process
    10.
    发明授权
    Voice coding process and device for implementing said process 失效
    语音编码过程和用于实现所述过程的设备

    公开(公告)号：US5001758A

    公开(公告)日：1991-03-19

    申请号：US35806

    申请日：1987-04-08

    申请人： Claude Galand ,  Jean Menez

    发明人： Claude Galand ,  Jean Menez

    IPC分类号： H04B14/04 ,  G10L19/06 ,  H03M7/30

    CPC分类号： G10L19/06

    摘要： The voice signal is analyzed to derive therefrom a low frequency base band signal, linear prediction coefficients and high frequency (HF) descriptors. Said HF descriptors include HF energy indications as well as indications relative to the phase shift between the low frequency and the high frequency band. Said HF descriptors are used during the voice synthesis operation to provide an inphase HF bandwidth component to be added to the base band prior to be used for driving a linear prediction synthesis filter tuned using said linear prediction parameters.