Figure 1. The concat and frame-by-frame operations in exist-
ing methods struggle to efficiently extract sub-pixels and suppress
noise, leading to remaining artifacts and over-smoothed details, as
shown in (a). We observe that noise randomly appears on several
frames, while effective sub-pixels have consistent intensity at cor-
responding positions in all frames, as shown in (c). Based on this,
a novel inter-frame query and intra-frame scanning-based QMam-
baBSR is proposed to extract more accurate sub-pixels while mit-
igating noise interference simultaneously, as shown in (b).