While a film is converted to video using a Telecine machine for example, it is necessary to match the film frame rates and the video frame rates. The process used for NTSC is called 3:2 Pull-down, and for PAL it is called a 2:2 Pull-down. Due to the complexity of the process, digital artifacts are often generated. A good quality Scaler automatically detects the Pull-down process and corrects the flaws to generate a clean, jagged-free image.
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