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1. 发明申请

WO1996021313A1 ACOUSTIC ECHO SUPPRESSOR WITH SUBBAND FILTERING 审中-公开
标题翻译：具有子带过滤功能的声学ECHO抑制器
公开(公告)号：WO1996021313A1
公开(公告)日：1996-07-11
申请号：PCT/FR1995001743
申请日：1995-12-27
申请人： MATRA COMMUNICATION , BOUDY, Jérôme , CAPMAN, François
发明人： MATRA COMMUNICATION
IPC分类号： H04M09/08
CPC分类号： H04M9/082
摘要： The echo suppressor is intended to be placed between a free-hand acoustic interface and a communication network. It comprises a plurality of processing channels mounted in parallel and each affected to one of a plurality of adjacent subbands of the spectral band of the output signal. Each channel comprises an analysis filter which receives the signal, affected with an echo, to be emitted after correction, a second analysis filter receiving the incoming signal, from the network, and supplying an adaptive filter providing an estimated echo in the respective subband at the subtractive input of the subtracter and a synthesis filter. The adaptive filter of at least some of the subbands implements the algorithm RLS with QR breakdown of the incoming signal, in fast processing, with recursive or non-recursive order.
摘要翻译：回波抑制器旨在放置在自由声学接口和通信网络之间。它包括并行安装并且各自影响输出信号的频谱带的多个相邻子带中的一个的多个处理通道。每个通道包括分析滤波器，其接收来自网络的在校正之后发射的受回波影响的信号，接收来自网络的输入信号的第二分析滤波器，并且提供自适应滤波器，该自适应滤波器在相应子带中提供估计回波减法器的减法输入和合成滤波器。至少一些子带的自适应滤波器在快速处理中以递归或非递归顺序实现了输入信号的QR分解的算法RLS。

2. 发明申请

WO1996023384A1 FREQUENCY-DOMAIN ADAPTIVE-FILTER ACOUSTIC ECHO CANCELLER 审中-公开
标题翻译：频域自适应滤波耳塞式收音机
公开(公告)号：WO1996023384A1
公开(公告)日：1996-08-01
申请号：PCT/FR1996000100
申请日：1996-01-22
申请人： MATRA COMMUNICATION , BOUDY, Jérôme , CAPMAN, François
发明人： MATRA COMMUNICATION
IPC分类号： H04M09/08
CPC分类号： H04M9/082
摘要： An echo canceller including an adaptive filter receiving the coefficients of a direct discrete transform in the frequency domain, said coefficients being calculated over a series of blocks in an input signal, and driving, via an inverse transform circuit, the substractive input of an adder for forming an output signal to the network, and a filter coefficient adapting circuit. Said canceller is characterised in that the adapting circuit receives the coefficients of the series of transforms for the output signal sample blocks via a noise reducer. The adapting circuit receives the coefficients of the series of transforms for the output signal sample blocks via a noise reducer.
摘要翻译：一种包括接收频域中的直接离散变换的系数的自适应滤波器的回声消除器，所述系数是通过输入信号中的一系列块来计算的，并且通过逆变换电路驱动用于向网络形成输出信号，以及滤波器系数适配电路。所述消除器的特征在于，适配电路经由降噪器接收输出信号采样块的一系列变换的系数。适应电路经由降噪器接收输出信号采样块的一系列变换的系数。

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