Guiding audio source separation by video object information

In this work we propose novel joint and sequential multimodal approaches for the task of single channel audio source separation in videos. This is done within the popular non-negative matrix factorization framework using information about the sounding object's motion. Specifically, we present methods that utilize non-negative least squares formulation to couple motion and audio information. The proposed techniques generalize recent work carried out on NMF-based motion-informed source separation and easily extend to video data. Experiments with two distinct multimodal datasets of string instrument performance recordings illustrate their advantages over the existing methods.