This document is Neural Network-based Video Coding NNVC 9.1. It includes the coding features and encoding methods implemented in NNVC software that are under coordinated exploration study by the Joint Video Exploration Team (JVET) of ITU-T VCEG and ISO/IEC MPEG as potential neural network video coding technology beyond the capabilities of VVC. The groups are working together on this exploration activity in a joint collaboration effort known as the Joint Video Exploration Team (JVET) to evaluate compression technology designs proposed by their experts in this area.