HimaTalk: robust audio-driven Tibetan talking head generation via bi-directional Mamba and spatiotemporal constraints. - Tingting Du; Xiangzhen He; Xianghe Meng; Xue Ding; Wenhao Jiang; Xiang Wang; Haotian Zhu; Jingbin Hao; Shibiao Shi; Xu Ouyang; Ruilei Shan (J. King Saud Univ. Comput. Inf. Sci., 2026)