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【正文】 tal Comb Filters design digital b filters to separate Luminance Y(t) and Chrominance C(t), ., I/Q, signals from NTSC TV signals.– I, Q are quadrature modulated by fc. fc=455*fH/2=3579545Hz ~= , where fH =15734Hz (linescanrate)– I, Q are quadrature amplitude modulated (QAM), C(t) = I(t)．cos(2πfc+33o) + Q(t)．sin (2πfc+33o) – Composite video: Sc(t) = Y(t) + C(t)– Demodulation– Ideal case : b filter to separate Y(t) and C(t), synchronous demodulation of C(t) to recover I(t) and Q(t). – Economic case: simple bandpass filters to separate luminance and chrominance, luminance is 3 MHz bandwidth, I,Q chrominance is MHz bandwidth. – Digitization: fmax = , 4fc= is a multiple of linescan rate. Test procedure:1. obtain NTSC TV signal2. digitize NTSC signal as the input signals of the filters3. send digitized TV signals into b filters 4. display color images, evaluate the color image quality perceptually5. pare with the simple bandpass filter resultsThe report must include tables with the following items:1) filter type (IIR、FIR?)2) filter order6 /
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