Echo canceller for a packet signal

Details Echo canceller for a packet signal Echo canceller for a packet signal

1996-11-27

1999-05-18

Hsu, Alpus H.

Multiplex communications

Duplex

Transmit/receive interaction control

370290, 379410, H04B3/23

Patent

active

059057173

ABSTRACT:
An echo canceller of the present invention and for packet signals includes a buffer (4) for converting the rate of a residual echo, and a buffer (1) for converting the rate of a received packet. An echo path estimator (2) generates, by referencing the outputs of the buffers (1, 4), filter coefficients for estimating an echo path. An adaptive FIR (Finite Impulse Response) filter (3) performs convolutional computation with the filter coefficients and the output of the buffer (1) for thereby outputting a false echo component. A buffer (5) packetizes the false echo component. A subtracter (6) subtracts the packetized false echo component from a packet to be transmitted so as to cancel an echo. Because a line assigned to the packet to be transmitted involves only subtraction, the echo canceller prevents packets from being delayed.

REFERENCES:
patent: 5263020 (1993-11-01), Yatsuzuka et al.
patent: 5272695 (1993-12-01), Makino et al.
patent: 5539731 (1996-07-01), Haneda et al.
patent: 5606550 (1997-02-01), Jangi

Affiliated with

Also associated with

Rating

Echo canceller for a packet signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Echo canceller for a packet signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Echo canceller for a packet signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1765544