Trellis Viterbi trellis_viterbi_x from gnuradio import trellis trellis.viterbi_$(type)(trellis.fsm($fsm_args), $block_size, $init_state, $final_state) Type type enum Int i io:int Short s io:short Byte b io:byte FSM Args fsm_args raw Block Size block_size int Initial State init_state -1 int Final State final_state -1 int in $type.io out $type.io Viterbi Decoder. \ The fsm arguments are passed directly to the trellis.fsm() constructor.