Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1998-12-07
2000-09-19
Hsia, Sherrie
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348607, 348608, 348914, H04N 5213
Patent
active
061220159
ABSTRACT:
A system for filtering digital television signals is provided. The system comprises a generator for providing a first data sequence to a private data packetizer, and a transmitter for transmitting the packetized first data sequence in a data channel of a digital television signal. The system further includes a receiver for receiving the digital television signal and recovering the first data sequence. The receiver includes a channel estimator for providing an estimate of channel characteristics, such as estimated channel impulse estimate and estimated noise variance. The receiver further includes an adaptive equalizer filter having an input for receiving the digital television signal and an input for receiving adaptive filter coefficients. The receiver further includes a coefficient processor for calculating adaptive filter coefficients based on the channel estimate, and providing the adaptive filter coefficients to the adaptive equalizer filter. The digital television signal is thus filtered to remove undesired channel effects.
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"Design and Selection of a Ghost Cancelling Reference Signal for Television Systems in North America," Proceedings of Canadian Conference on Electrical and Computer Engineering, Vancouver, BC, Canada, 14-17 Sep. 1993, pp. 660-663.
"Training Signal and Receiver Design for Multi-Path Channel Characterization for TV Broadcasting," D. -D Wang, T. -H.S. Chao, BR Saltzberg, IEEE Transactions on Consumer Electronics, vol. 36, No. 4, Nov. 1990, pp. 794-806.
"Fast Computation of Channel-Estimate Based Equalizers in Packet Data Transmission," N. Al-Dhahir, J. Cioffi, IEEE Transactions on Signal Processing, vol. 43, No. 11, Nov. 1995, pp. 2462-2473.
Al-Dhahir Naofal Mohammed Wassel
Frey Richard Louis
Grabb Mark Lewis
Hershey John Erik
Van Stralen Nick Andrew
General Electric Company
Hsia Sherrie
Ingraham Donald S.
Johnson Christine
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