let start = band_start[gr_no][band];
let end = band_end[gr_no][band];
super::apply_ms(&mut coef0[start..end], &mut coef1[start..end]);
let start = band_start[gr_no][band];
let end = band_end[gr_no][band];
super::apply_ms(&mut coef0[start..end], &mut coef1[start..end]);