Multiplexer and imaging system

A multiplexer comprising:

• an input unit to which a plurality of image signals based on a first data communication standard are input, the image signals being acquired by respective imaging devices;
• an output unit that outputs an image signal based on a second data communication standard having a data transfer rate lower than that of the first data communication standard;
• a processing unit that converts the image signals based on the first data communication standard input to the input unit into the image signal based on the second data communication standard;
• and
• a storage unit that temporarily buffers the image signals input from the input unit;
• wherein when each of the imaging devices is assumed to be an n-th imaging device (n=1 to m) and packet data input from the n-th imaging device (n=1 to m) to the input unit is n-th packet data (n=1 to m),
• the output unit sequentially outputs an image signal based on the second data communication standard converted from first packet data input from a first imaging device to the input unit to an image signal based on the second data communication standard converted from m-th packet data input from an m-th imaging device to the input unit, and
• the n-th packet data (n=1 to m) is data smaller than image data for one screen captured by the n-th imaging device (n=1 to m).