Antonelli, Terry & Wands
Scan signal processing system
 An analog scan signal having a repetitive background waveform is converted into a multi-level signal through a peek hold circuit, a converter, a digital memory and a discriminator. The peak hold circuit detects and holds the peak voltage of the current scan lines. The background waveform is normalized by the peak voltage and converted into a digital signal in the converter and stored in the memory. The analog scan signal is discriminated in the discriminator on the basis of a reference voltage produced with the normalized background waveform read out of the memory and converted in the converter and with the current peak voltage supplied from the peak hold circuit. 
Nippon Telegraph & Telephone Public Corporation Hitachi, Ltd.
H G H
H04N G06V H04N
inventional inventional inventional
Taizoh Kiyohiko Masaharu
Nakano Tanno Tadauchi