Flickers Forecasting In CRT Using Stochastic Analysis

1. INTRODUCTION Series of individual images in a movie clip called frames. When these images are shown rapidly in succession, a viewer has the illusion that motion is occurring. The viewer cannot observe the flickering in a movie clip due frame continuation is known as persistence of vision. It is due to eye retains on a visual image for a fraction of a second after the source has been removed. While watching a movie observer noticed unwanted checker boxes when a movie scene changed this can be called as Flickers. These flickers are due to abrupt variation of intensities in the phosphorous pixels Yoon, (2011). Flicker forecasting and avoidance can improve the video quality and provides flicker free environment. It is difficult to calculate abruption in pixels but can be forecast by stochastic method. This process contains family of random variables which is indexed by the parameter " t " and defined on a common probability space (Ω, F, P) whereas t, w , Ω, Xt (w) is a random variable. For each w, T, Xt (w) is called a sample function or realization of the process. The result shows that intensity barrier is one of the main causes behind this error, by comparing two pixels of two separate frames shows the intensity gap. The intensity gap among two pixels can easily determine by probability of selected pixels. Hence by comparing the pixels intensities it is easy to calculate flickers. The analysis shows the flicker will emerge in a clip if probability among pixels is above 0.05. In order to reduce flicker we add a new pixel among higher probability pixels. This additional pixel contains the mean pixel values of consecutive pixels that can reduce the luminosity of a flicker. On fast motion scenes, a variable bit rate uses more bits than it does on slow motion scenes of similar duration yet achieves a consistent visual quality. High definition video transmission, low bandwidth can also produce flicker or checkers. Human Eye cannot notice it due to persistence of vision and beta movement On the other hand, the Flat-panel liquid crystal display (LCD) monitors do not suffer from flicker even if its refresh rate is 60 Hz or even lower. This is because LCD pixels open to allow a continuous stream of light to pass through until instructed by the video signal to produce a darker color. In contrary monitors are …