Patent ID: 7593065
Filing Date: 2009-09-22
Classification: H04N

Abstract:
1. A method for channel filtering of an analog or digitally modulated TV signal ( 125 ), comprising: receiving the TV signal that includes a video signal component, a sound signal component, and a video carrier signal at a video carrier frequency; bandshifting the TV signal ( filtering the in-phase signal (I) in a first Hilbert filter (HF-I) of a Hilbert filter pair (HF-I, HF-Q) having an even symmetrical impulse response (h filtering the quadrature signal (Q) in a second Hilbert filter (HF-Q) of the Hilbert filter pair (HF-I, HF-Q) having an uneven symmetrical impulse response in order to obtain a Hilbert-filtered quadrature signal (Q adding the Hilbert-filtered quadrature signal (Q