Printing system, printing control apparatus, printing apparatus and method for generating a band compressed image data and print command includes selection of omitting untransmitted data set

摘要

The printing control apparatus compares, when printing a bit image, a data set of a transmitted compressed image data to a data set of an untransmitted compressed image data, omits transmission of the data set in the subsequent compressed image data when the data sets coincide with each other, and notifies the printing apparatus that transmission of the data set has been omitted with setting in a printing command. The printing apparatus holds the compressed image data in which the data set has been omitted, and, when it is notified that transmission of the part of the data set has been omitted, generates the bit image by reusing a part of the already existing data set and developing the held compressed image data.

主权项

1. A printing system that outputs a printing command from a printing control apparatus to a printing apparatus,
wherein, a printing process is performed for each band of a page on a bit image, compressed image data is transmitted from the printing control apparatus to the printing apparatus in response to the bit image, the compressed image data includes image data subjected to lossy compression so as to be developed by using a predetermined data set, and the predetermined data set, the printing command includes a selection of omitting the predetermined data set, the printing control apparatus includes a processor to: compare a transmitted data set of the transmitted compressed image data to a untransmitted data set of the untransmitted compressed image data when printing the bit image, omit transmission of the untransmitted data set in the subsequent compressed image data when the data sets coincide with each other, and notify the printing apparatus that transmission of the untransmitted data set has been omitted, and the printing apparatus includes a central processing unit (CPU) to: hold the compressed image data in which the untransmitted data set has been omitted, and generate the bit image by developing the image data of the held compressed image data by reusing an already existing data set when it is notified that the transmission of the untransmitted data set has been omitted.