No.16S058-01 E. DSP: Aperture The aperture (edge enhancement) settings are changeable in this window. The aperture (edge enhancement) settings are changeable for each DSP preset. 1) Front aperture The aperture (edge enhancement) process is done for each Red, Green and Blue of the RGB image before Bayer conversion. 2) Back aperture The aperture (edge enhancement) process is done for Y signal of YUV image after Bayer conversion. 33/49 STC-HD133 Series (STC-HD133DV / STC-HD133SDI) / STC-HD93 Series (STC-HD93DV / STC-HD93SDI) Users guide