Sixian Wang Jincheng Dai Xiaoqi Qin Zhongwei Si Kai Niu 0001 Ping Zhang 0003 Improved Nonlinear Transform Source-Channel Coding to Catalyze Semantic Communications. 1022-1037 2023 September 17 IEEE J. Sel. Top. Signal Process. 5 https://doi.org/10.1109/JSTSP.2023.3304140 db/journals/jstsp/jstsp17.html#WangDQSNZ23