Date Aug. 1, 1996The echo canceller comprises an adaptive filter receiving the coefficients of a direct discrete transform into the frequency domain, computed on successive blocks of an input signal and fed via an inverse transform circuit to the subtractive input of an adder for forming an ...
transducer elements between the phase rotation means and first adder; rectifier means for rectifying the outputs of the adders; a delay line for delaying signals from the first adder; and, subtraction means for taking the difference of the first and second adder outputs and displaying the results...
(60) or a voice output device (70) is detected by a movement detection section (12), a reference signal is generated by reference signal generation sections (14, 16), superimposed on the voice signal received from terminal devices (3, 4) by an adder (24), and output from a speaker (...
of EP0287742 Echo cancelling device for cancelling echoes affecting the incoming signal received over a two-wire telephone line, comprising near echo canceller 20, far echo canceller 22 and an adder 26 providing the estimated echo signal. A circuit path including a digital-to-analog converter 48 ...
The output vector Y′=H′{circle around (X)}X′ of the monophonic filter 46 is added to the output vectors Y1=H1{circle around (X)}X1 and Y2=H2{circle around (X)}X2 of the stereo filters 13 by the adder 14. The resulting vector Y=Y1+Y2+Y′ is then processed as in the pre...
An adder, responsive to the different control signals, modifies the coefficients by different amounts corresponding to the plurality of increments.doi:US3836734 ACAMPANELLA SSUYDERHOUD HONUFRY MUSUS3836734 * Dec 3, 1971 Sep 17, 1974 Communications Satellite Corp,Us Adaptive echo canceller with ...
An echo canceller with adaptive non-linearity is disclosed. In an embodiment, an incoming signal coming in from the far end is passed to a probe signal adder, which may add a probe signal to the incoming signal and may perform other signal conditioning before passing the signal to a play...
Adaptive echo compensator for asynchronous CW system - has frequency corrector containing two multipliers, Hilbert transformer, adder and voltage controlled oscillatorThe echo compensator has a frequency corrector (FR) containing two multipliers (M1, M2) whose outputs are added (A1) to produce a ...
Moreover, notch filters may be provided to eliminate a tone signal frequency component at input stages of the adaptive filter and the adder for echo cancellation.Masashi Takada
The correction circuits (223) and the (323) consist of an adder circuit with a number of inputs, each of which is connected to an output of a delay line (227i, 327i) whose input is connected to the output of an attenuator (226i, 326i) ....