1. A Transmission Parameter Signaling (TPS) decoder, for a Digital Video Broadcasting-Terrestrial (DVB-T) television system, comprising: an input signal estimator, for receiving a plurality of frequency-domain input signals and a plurality of channel measure signals to produce a plurality of estimated input signals, wherein the frequency-domain input signals correspond to TPS signals from a frame; a masking device, connected to the input signal estimator, for performing a masking operation on the estimated input signals to produce a plurality of masking signals; a vector index determinator, connected to the masking device, for determining a vector index corresponding to the frequency-domain input signals according to the masking signals; and a lookup table device connected to the vector index determinator for producing a codeword according to the vector index.