Patent ID: 8885188

Claim:
An image forming apparatus having a communication system, the communication system comprising: a transmitter configured to generate and transmit a multiplexed signal for a plurality of pulse signals, the multiplexed signal including a value indicating an amplitude of each pulse signal of the plurality of pulse signals at a sampling timing; and a receiver configured to receive the multiplexed signal and output the plurality of pulse signals, wherein the transmitter comprises: a detector configured to detect an error amount of an edge position of a pulse signal caused by sampling; and a multiplexer configured to include a value indicating the detected error amount in the multiplexed signal, and the receiver comprises: a demultiplexer configured to demultiplex the multiplexed signal and output a value indicating an amplitude of the pulse signal and the value indicating the error amount of the pulse signal; and a corrector configured to correct an edge position of the pulse signal using the error amount of the pulse signal, the edge position being obtained from the value indicating the amplitude of the pulse signal output from the demultiplexer.