Annoying visual phenomena mainly related to the interlacing of video fields, which show up as small vibrations on the screen. Flicker also appears when static images are displayed on the screen, as in computer generated text when transferred to video. Poor digital image treatment, as in low priced standard converters (going between PAL and NTSC), will create an annoying flicker on the screen. There are several electronic techniques to minimize flicker, such as line averaging and filtering.
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