In standard definition TV sets, analog covers most anything picture related plus the audio, once the FM signal is demodulated. In the new HDTV (digital sets) about the only portion of the TV is the...
Just go buy a converter box at an retail shop that sells TV's or computers. They are actually labeled "Analog to Digital Signal Converter". Easy as pie.
A: the device that you are searching for is called Analog Digital Converter or ADC . It takes samples of inputs signal and compere to a solid analog reference and output a digital representation in...