Patent ID: 7344069
Filing Date: 2008-03-18
Classification: G06Q,G07G

Abstract:
1. A point-of-sale system comprising a host unit and a plurality of point-of-sale terminal units connected thereto via a predetermined communication line for data transfer/receipt between each point-of-sale terminal unit and the host unit, wherein: maintenance programs for the point-of-sale system are stored in the host unit; execution programs of the point-of-sale system are stored in the host unit; each point-of-sale terminal unit is not provided with any point-of-sale system execution program, and has at least a transmission data generating function and a communication function for data exchange with the host unit; the transfer/receipt data is subjected to data quantity reduction and compression; and the data reduction and compression are performed in units of image data frames by comparing the present frame and immediately preceding frame of transferred data, only data recognized to have been changed with respect to the immediately preceding frame being compressed.