Binary signal processor

Abstract

Abstract PURPOSE:To prevent deterioration of picture quality due to the photoelectric conversion system, by performing a binary coding with the reference level signal which varies regularly within the unit cycle of the picture element signal row and then compensating the reference level signal with the compensation signal obtained by giving a photoelectric conversion to the reference pattern. CONSTITUTION:The reference level signa generator 5 delivers the reference level signal having a certain amplitude of the saw-tooth wave. On the other hand, the level compensating signal is delivered from the line sensor 1 in case the reference pattern is formed in an even white color and then stored in the memory 2. This compensating signal corresponds to the characteristic distribution proper to the photoelectric conversion system. Then a multiplication is given by the multiplier 6 between the signal given from the generator 5 and the memory signal of the memory 2. This output signal is turned into the reference level signal which received an amplitude modulation in correspondence to the compensating signal. This level signal is compared with the video signal of the sensor 1 through the comparator 3 and then binary coded, and this binary coded signal is extracted through the output termianl 8. In such way, the deterioration of quality is prevented for the reproduced picture, which is caused by the characteristic distribution proper to the photoelectric conversion system.

Inventors

• 👤 Yoshihiro Miyamoto

Bibliographic Details