[Telemelody] Pipeline of Collecting Lyric-Rhythm Data

[mlpeng2003]

In your paper, about collecting Lyric-Rhythm Data, I found these description:

Finally, with tempo information and timestamp of each lyric, we can infer beat-level onset, that is, the corresponding rhythm of each lyric.
We use 4 tokens ranging from 0 to 3 to represent rhythm patterns, that is, beat-level onset position in a bar.

My understanding is to find the position of each beat within the bar, corresponding to the number 0-3. To find the location of the beat, there is librosa.beat function in librosa, but for finding the location of the bar, I didn't find a function available in librosa.
I have checked a lot of information, but I still have some question about the details. Could you explain it in detail? Or can share the code about this?