c3d and trb are Point Motion Capture Formats
http://www.youtube.com/watch?v=S8vSSp1z9xQ...feature=related
http://www.youtube.com/watch?v=OEoDw6tnv38...feature=related
http://www.youtube.com/watch?v=PKX7YwbjnuA...feature=related
high quality data similar to bvh
CSM/TRC/C3D/TRB are Point Motion Capture Formats
BVH/HTR are Skeleton Motion Capture Formats