Temporal Evidence Routing with Structured Visual Evidence for TimeLogicQA
For video QA researchers, this work provides a structured approach to temporal reasoning, though it is an incremental improvement over existing methods.
The paper tackles temporal reasoning in video question answering with a pipeline that separates perception from symbolic reasoning, achieving 81.8 AvgAcc on the TimeLogicQA benchmark.
TimeLogicQA evaluates whether video question answering systems can reason over temporal relations such as event existence, ordering, persistence, boundary conditions, and overlap. We address this task with a visual evidence routing pipeline that separates perception from symbolic temporal reasoning. The system first parses each question into event targets, answer mode, candidate options, and temporal operators. It then routes videos according to duration and operator difficulty, using ordered full-frame evidence for short clips and event-focused candidate windows for long videos. A multimodal large language model produces structured visual evidence for the relevant events, while programmatic verifiers recover dense action intervals and a deterministic reducer applies operator-specific temporal rules to produce the final answer. Conservative fusion accepts an answer only when the visual evidence, temporal program, and confidence checks agree, reducing noisy answer flips. On the official test evaluation, our final system achieves an AvgAcc of 81.8.