About the Highway Network output Dimension in BiDAF

[shiwang-Xing]

Thank you for sharing your work, but I have a question about the output dimension of the highway network in BiDAF.
In the original paper, the author said:
The outputs of the Highway Network are two sequences of d-dimensional vectors, or more conveniently, two matrices: X∈R^{d×T} for the context and Q∈R^{d×J} for the query.
So, I think that the input dimension of embedding is 2d and output is d.
Hope you can answer this question.
Best regards.