[not-for-merge] [src] Adding binary lattice-to-ngram-counts

[david-ryan-snyder]

This PR adds a binary called lattice-to-ngram-counts that computes n-label softcounts over input lattices.

Note that this binary may need to be used in conjunction with lattice-expand-ngram (https://github.com/kaldi-asr/kaldi/blob/master/src/latbin/lattice-expand-ngram.cc) so that each arch as a unique n-label history.

The PR is currently "not-for-merge" but may be added to the main branch at some point.

@m-wiesner

[david-ryan-snyder]

@m-wiesner was this code, or something similar to it, ever added to the main branch?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[kkm000]

@david-ryan-snyder, @m-wiesner, where we are at this?

[stale]

This issue has been automatically marked as stale by a bot solely because it has not had recent activity. Please add any comment (simply 'ping' is enough) to prevent the issue from being closed for 60 more days if you believe it should be kept open.

[kkm000]

@david-ryan-snyder, @m-wiesner, friendly ping?

[danpovey]

I think it's OK to merge but it's not used in any recipes. We can just leave the PR up, I think, in case people need it, and if it seems useful for anything we want to commit we can merge it.

[kkm000]

Agree, it makes no sense to maintain unused code.