Abstract: An image transmitter, comprising: a color difference differential calculating unit configured to calculate color difference differential data relating to a difference between a current predicting value predicted based on a previous image data and current actual image data; a coding unit configured to code the color difference differential data to generate coding data; a multi-valuation unit configured to generate multi-valued data based on the coding data and an occurrence probability of the coding data based on statistical properties of the image data; and a transmitting unit configured to transmit the multi-valued data via at least one transmission line.

Abstract: An image transmitter, comprising: a color difference differential calculating unit configured to calculate color difference differential data relating to a difference between a current predicting value predicted based on a previous image data and current actual image data; a coding unit configured to code the color difference differential data to generate coding data; a multi-valuation unit configured to generate multi-valued data based on the coding data and an occurrence probability of the coding data based on statistical properties of the image data; and a transmitting unit configured to transmit the multi-valued data via at least one transmission line.

Abstract: In a current amplifier circuit having a feedback type operational amplifier, the operational amplifier has at an output stage a signal detecting transistor through which a signal current flowing through the feedback loop flows. The current amplifier circuit further comprises a bias current adder circuit, a bias current subtractor circuit, and a reference bias generator. The bias current adder circuit allows a bias current to flow steadily through the signal current detecting transistor of the operational amplifier. The bias current subtracter circuit has a further transistor through which a current flows of a magnitude equal to the sum current of the signal current flowing through the signal current detecting transistor and the bias current, and subtracts the bias current from the current flowing through the transistor to output only the signal current. The reference bias generator circuit determines a magnitude of the bias current.