ENET-SAD 논문(원본) https://arxiv.org/pdf/1908.00821.pdf
ENET-SAD 자료 1 https://www.youtube.com/watch?v=FqffXu7xUJU
encoder attention 자료 1 http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=910033&flag=dissertation