Patents:
M. Tomlinson and K.M.
Wong, “TDM-FDM signal converter”, A digital system transforming two
30-channel PCM telephone frames to a supergroup of FDM signals using all
digital electronic devices. Patent no. 17342/75, United Kingdom, Nov. 1975.
M. Tomlinson, K.M.
Wong and R.M. Mark, “Minimum sampling rate TDM-FDM converter”, A digital
system (later more widely known as the transmultiplexer) which utilizes the
concept of periodically varying digital filters to convert efficiently two
30-channel PCM telephone frames to a supergroup of FDM signals. Patent no.
6084/76, United Kingdom, March 1976.
M. Tomlinson and K.M.
Wong, “FDM supergroup to PCM converter”, A digital system performing the
reverse process of the device in (2) Patent no. 6085/76, United Kingdom, March
1976.
Q. Jin, K.M. Wong, P.
Wu, Q. Wu, “A wavelet-based echo canceller for telephony”, U.S. Patent in
application, no. 08/671,869, September, 1995.