Methods and systems for providing multi-path echo cancellation

Details Methods and systems for providing multi-path echo cancellation Methods and systems for providing multi-path echo cancellation

2007-04-03

2007-04-03

Harold, Jefferey (Department: 2614)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406010, C379S406080, C379S406110

Reexamination Certificate

active

10316119

ABSTRACT:
Providing multi-path echo cancellation comprises providing a main echo signal corresponding to a main echo section of an echo response and providing a plurality of tail echo signals, each of the plurality of tail echo signals corresponding to respective tail echo sections of the echo response. Next, providing a multi-path echo canceller comprises summing the main echo signal and the plurality of tail echo signals to provide a synthesized echo.

REFERENCES:
patent: 5084865 (1992-01-01), Koike
patent: 5343522 (1994-08-01), Yatrou et al.
patent: 5675644 (1997-10-01), Sih
patent: 2005/0117739 (2005-06-01), Demirekler et al.
Philip Chu-Wah Yip and Delores M. Etter, Oct. 1990, IEEE Transactions on communications, vol. 38, No. 10, pp. 1694-1695.
D.G. Messerschmitt, “Echo cancellation in speech and data transmission,”IEEE J. Select. Areas in Commun., vol. 2, pp. 283-297, Mar. 1984.
C.-P. Tzeng,Timing recovery in digital subscriber loops.Ph.D. Thesis, University of California, Berkeley, 1985.
International Telecommunication Union, “Single-pair high-speed digital subscriber line (SHDSL)) transceivers.” ITU-I G.991.2, Feb. 2001.
G.W. Davidson and D.D. Falconer, “Reduced complexity echo cancellation using orthonormal functions,”IEEE Trans. Circuits Syst., vol. 38, pp. 20-28, Jan. 1991.
A. Abousaada, T. Aboulnasr, and W. Steenaart, “An echo tail canceller based on adaptive interpolated FIR filtering,”IEEE Trans. Circuits Syst. II, vol. 39, pp. 409-416, Jul. 1992.
S.S. Lin and W.R. Wu, “A low complexity adaptive interpolated FIR echo canceller,” inProc. IEEE Int. Symp. Circuits and Syst., vol. IV, pp. 438-441, 2001.
Y. Neuvo, D. Cheng-Yu, and S.K. Mitra, “Interpolated finite impulse response filters,”IEEE Trans. Acoust. Speech, Signal Processing, vol. 32, pp. 563-570, Jun. 1984.
S. Haykin,Adaptive Filter Theory. New Jersey: Prentice Hall, Inc., 3rded., 1996.
A.V. Oppenheim and R.W. Schafer,Discrete Time Signal Processing. New Jersey: Prentice Hall, Inc., 1989.
T. Saramaki, T. Neuvo, and S.K. Mitra, “Design of Computational efficient interpolated FIR filters,”IEEE Tarns. Circuits Syst., vol. 35, pp. 70-88, Jan. 1988.
T.W. Parks and C.S. Burrus,Digital Filter Design. New York: John Wiley & Sons, 1987.
J.G. David Forney and M.V. Eyuboglu, “Combined equalization and coding using precoding,”IEEE Commun. Magazine, pp. 25-34, Dec. 1991.
Abousaada, Anis et al., “Performance Analysis of an Efficient AIFIR Echo-Tail Canceller,”IEEE(1991), pp. 552-555.
Davidson, Gordon W. et al., “Reduced Complexity Echo Cancellation Using Orthonormal Functions,”IEEE Transactions on Circuits and Systems, vol. 38, No. 1, Jan. 1991, p. 20-28.

Affiliated with

Also associated with

Rating

Methods and systems for providing multi-path echo cancellation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and systems for providing multi-path echo cancellation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and systems for providing multi-path echo cancellation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3758956