LINE DOUBLER/ QUADRUPLER/SCALER
In its simple form, a device which converts a video signal to a high frequency computer DATA type signal. It is intended primarily for displaying video on a VGA monitor or on a DATA wide screen projector. An ADC is applied to the video signal, reading it into RAM (Random Access Memory), adding lines and shifting the data to use high frequency scan rates as used by computers, and then passing the signal through a DAC in order to obtain an analog signal. Those devices are sometimes also called de-interlacers as they convert an interlaced video signal to a non-interlaced signal. See also Scaler.
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