Patent ID: 8749831

Claim:
A printing system including a printer and a host computer which transfers image data to the printer, the printing system comprising: a data transfer unit configured to transfer the image data as image data in a first data format in a case where a connection between the printer and the host computer is a first connection means, and transfer the image data as image data in a second data format in the case where the connection between the printer and the host computer is a second connection means, wherein the second connection means has less data communication amount per unit time than the first connection means, and when given image data is transferred, image data in the second data format, corresponding to the given image data, has less data amount than image data of the first data format, corresponding to the given image data, wherein the data transfer unit determines an effective rate of data transfer in the case of the first connection means and an effective rate of data transfer in the case of the second connection means and wherein the data transfer unit adjusts a degree of the first data format based on the effective data rate of the first connection means or a degree of the second data format based on the effective rate of data transfer of the second connection means.