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Two approaches
==============
Two approaches for FST-based forced alignment will be described:
- `Kaldi`_-based
- `k2`_-based
Note that the `Kaldi`_-based approach does not depend on `Kaldi`_ at all.
That is, you don't need to install `Kaldi`_ in order to use it. Instead,
we use `kaldi-decoder`_, which has ported the C++ decoding code from `Kaldi`_
without depending on it.
Differences between the two approaches
--------------------------------------
The following table compares the differences between the two approaches.
.. list-table::
* - Features
- `Kaldi`_-based
- `k2`_-based
* - Support CUDA
- No
- Yes
* - Support CPU
- Yes
- Yes
* - Support batch processing
- No
- Yes on CUDA; No on CPU
* - Support streaming models
- Yes
- No
* - Support C++ APIs
- Yes
- Yes
* - Support Python APIs
- Yes
- Yes
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