BeatFlow-ECG: Rectified Flow for ECG Reconstruction from Indirect Wearable Signals
BeatFlow-ECG reconstructs single-channel ECG signals using a conditional rectified-flow model that combines indirect wearable photoplethysmography (PPG) and inertial measurements. The model incorporates motion information through specialized conditioning and training strategies, achieving state-of-the-art performance across waveform and timing metrics compared to other methods.