... Lumi masking is the process where the encoder preferentially removes detail from areas of the image that are either very bright or very dark. This can assign more bitstream space to encoding medium-brightness blocks, which means that ...

... lumi masking, trellis quantization, QPEL, GMC, and H.263, MPEG and custom quan- tization matrices. It allows compressing and decompressing digital video to reduce the required bandwidth of video data for transmission over computer ...

... on MPEG-4 Part 2 Advanced Simple Profile (ASP). It implements features such as b-frames, global and quarter pixel motion compensation, lumi masking, three quantization modes (trellis, H.263 and MPEG), 106 X. Tang et al.