Patent ID: 7298786

Claim:
An enhanced VSB transmitter comprising: a convolutional encoder encoding an input bit to generate first and second output bits; and a trellis-coded modulation (TCM) encoder encoding the first and second output bits and outputting third, fourth, and fifth output bits, wherein the convolutional encoder comprises: N multipliers, each i th multiplier multiplying the input bit by a constant k i to generate an i th multiplier value for i=1, 2, 3, . . . , N; N+1 memories including a 1 st memory pre-storing a 1 st memory value being a previous second output bit outputted from the convolutional encoder, each (i+1) th memory storing an (i+1) th memory value obtained by adding an ith memory value stored in an i th memory with the i th multiplier value for i=1, 2, 3, . . . , N; and N adders, each i th adder adding the ith memory value with the i th multiplier value for i=1, 2, 3, . . . , N, wherein the first output bit is the input bit and the second output bit is an (N+1) th memory value stored in an (N+1) th memory, wherein the constant Ki is greater than 1 for at least one value i.