PERCEPTUAL PREPROCESSING FILTER FOR VIEWING-CONDITIONS-AWARE VIDEO CODING

摘要

one or more spatial frequency contrast sensitivity of viewers less than the limit of the video signal from the video signal The perceptual filter (perceptual filter) may be implemented to filter. Perceptual filter to adapt one or more perceptual filter parameters, for example, in the example, the content, viewing distance, display density (display density), on the basis of the contrast ratio, the display brightness, background brightness, and / or age of the viewer, in pixels, It can be configured to. The estimate of the DC, the amplitude of the video frame, and the contrast sensitivity (contrast sensitivity) can be performed. The cut-off frequency of the perceived spatial filter may be mapped to the contrast sensitivity. Perceptual filter can be used as the pre-processing step for the video encoder in order to lower the encoding bit rate. The slope effect (oblique effect) developing the human visual system (human visual system) can be included in perception filter.