Patent ID: 8325823

Claim:
An error correcting encoder for digital television broadcasting, comprising: a robust encoder for receiving a single one-bit input signal and encoding the input signal to thereby produce two output signals comprising robust encoded data; a pre-coding block for receiving and performing pre-coding on at least one of the two output signals to thereby produce a pre-coded signal; and a trellis encoding block for performing trellis encoding on at least one of the two output signals and the pre-coded signal, wherein the two output signals are X 1 (k) and X 2 (k), respectively, and wherein the robust encoder performs robust encoding based on equations: X 1 ( k )= X′ 1 ( k− 1) X 2 ( k )= Z 2 ( k− 1)⊕{ X′ 1 ( k )⊕ X′ 1 ( k− 1)Δ X′ 1 ( k− 2)} where ⊕ denotes an exclusive-or (XOR) operation; Z 2 (k−d) denotes a bit signal of Z 2 delayed by d at time k; and X(k−d) denotes a bit signal of X delayed by d at time k.