[hts-users:03114] Re: Use reference tree for clustering

[Kei Hashimoto <bonanza@xxxxxxxxxxxxxxx>]

Hello Xi,

A untied MMF has to be loaded for using reference trees. The context-clustering with "-q" option is almost same as the standard context-clustering. The difference is only that the top of tree is constructed using the questions of the reference tree. If you want to keep the original tree structure that is different from the reference tree, you should use the original tree as the reference tree.

The standard context clustering start after the clustering process stops referring the questions of the reference tree. How to stop is defined by the number (0 or 1) of "-q" option.

Regards,
Kei


(2011/11/08 16:34), Xi Wang wrote:
> Hello Kei,
>
> Thanks for your reply. I still have some doubts about the process.
>
> (1) First constructed trees using reference tree.
> Should the reference tree be compatible with loaded MMF model definitions?
> I mean if a untied MMF is loaded, it lose the assignment of which model
> with tree nodes.
> If it need the tree and corresponding clustered MMF, it becomes the problem
> which I mentioned last mail. I can't see the impact of reference tree. Your
> refer to the question of root node of reference tree, however, does it mean
> it doesn't primarily split the child node according to reference tree even
> if there is model assigned in the node?
>
> (2) Secondly, apply standard clustering at the second stage
> I'm not sure how to turn on the "context-clustering started in the middle
> of the tree building". The standard clustering process a already tree based
> clustered HMM model   without any further splitting in my test. Should I
> untie somethings?
>
> Thanks a lot
> Xi
>
>
> On Mon, Nov 7, 2011 at 7:15 PM, Kei Hashimoto<bonanza@xxxxxxxxxxxxxxx>wrote:
>
> > Hi,
> >
> > In the 2-stage clustering, tree are first constructed using the reference
> > tree, then the standard clustering is performed. However, when using the
> > reference information, the node is not split if any models are not assigned
> > to a child node. After that, the clustering stops using the reference
> > information.
> >
> > Please check the question of root node of your reference tree.
> >
> > Regards,
> > Kei
> >
> >
> > (2011/10/28 19:07), Xi Wang wrote:
> >
> > > Hi,
> > >
> > > I want to confirm if the new feature "Context-clustering can be started in
> > > the middle of the tree building" of HTS-2.2 in HHEd could achieve the
> > > 2-stage clustering. For instance, load a clustered tree and continue to
> > > split each nodes with new QS, then output the secondly clustered tree.
> > >
> > > I tried the -q n (with 0~3) and LT command to load reference tree, use TB
> > > command to do the new tree building.
> > > However, the tree structure seems to reset while create the root of the
> > > trees. It lose the structure of reference tree information I want to keep.
> > >
> > > Does anyone know if HHEd in HTS-2.2 could do the work, or I use it in the
> > > wrong way?
> > >
> > > Thanks a lot
> > >
> > > --
> > > Xi
>
>
> --