The initial traceback states must be integers between 0 and (number of states - 1), arranged in a matrix. Its number of

[omidrostaei]

The initial traceback states must be integers between 0 and
(number of states - 1), arranged in a matrix. Its number of rows must equal the
number of states in the specified trellis, and its number of columns must equal
the traceback depth.

vitdec