where Obin means i-th bin’s accumulated shifts value during m-layer multiple embedding. The distortion also is divided by two parts: (a) The former is the shifting distortion for those non-peak bins, which are shifted as an entirety with the same accumulated shifting value Obin; (2) D represents the distortion caused by single utilized (non-repeated utilized) peak bin Pk , half of which will be changed to be adjacent value towards Zk to hide w = 1 with shift being (Obin + 1) or (Obin − 1), which depends on the relative location between