This program is used to smooth a set of context-dependent tied mixture
or discrete HMM's using deleted interpolation.
The program operates as a replacement for the second pass of HEREST
when working in parallel mode
. It reads in the N sets of accumulator files containing the
statistics accumulated during the first pass and then interpolates the
mixture weights between each context dependent model and its corresponding
context independent version. The interpolation weights are chosen to
maximise the likelihood of each deleted block with respect to the
probability distributions estimated from all other blocks.