Patent ID: 6441843
Filing Date: 2002-08-27
Classification: H04N

Abstract:
A digital television receiver for receiving a digital television signal subject at times to being accompanied by a co-channel analog television signal, said digital television receiver improved to include therewithin a combination comprising:an adaptive equalizer filter with adjustable filtering parameters for supplying an equalizer filter response, said adaptive equalizer filter being a digital filter, and including a feedback filter, connected to receive as an input signal thereto a stream of successive digital samples of demodulated digital television signal descriptive of baseband symbol code having a prescribed symbol rate, accompanied by demodulation artifacts of said co-channel analog television signal at said times that said co-channel analog television signal accompanies received said digital television signal; and an interference-suppression filter connected to receive said equalizer filter response as input signal, said interference-suppression filter being a digital filter for supplying an interference-suppression filter response to said equalizer filter response, in which interference-suppression filter response said demodulation artifacts of said co-channel analog television signal are suppressed.