86. 1.1 Block Diagram Representation In the time domain, the input-output relations of an lti digital filter is given by the convolution sum y]=2∑k=小kn- or, by the linear constant coefficient difference equation y小=-∑:4yn-k]+2k20pm-k§6.1.1 Block Diagram Representation • In the time domain, the input-output relations of an LTI digital filter is given by the convolution sum ∑ ∞ =−∞ = − k y[n] h[k] x[n k] ∑ = ∑ = = − − + − M k k N k k y n d y n k p x n k 1 0 [ ] [ ] [ ] or, by the linear constant coefficient difference equation