GDPO: Group reward-Decoupled Normalization Policy Optimization for Multi-reward RL Optimization | Shih-Yang Liu; Xin Dong; Ximing Lu; Shizhe Diao; Peter Belcak; Mingjie Liu; Min-Hung Chen; Hongxu Yin; Yu-Chiang Frank Wang; Kwang-Ting Cheng; Yejin Choi; Jan Kautz; Pavlo Molchanov | ResearchPod