I have read it in a paper https://cs230.stanford.edu/projects_spring_2018/reports/8291197.pdf, convLSTM 3x3-256-2 means convLSTM with 3x3 filter size, 256 hidden states, and 2 layers.
But the original https://keras.io/api/layers/recurrent_layers/conv_lstm2d/ do not show any argument regarding hidden states and layers.
Please elaborate this text, and how do we write it in the python code?
Regards