Printing apparatus and control method
AssigneeCanon Kabushiki Kaisha
InventorsHiroyuki Shioiri, Kazuhiro Ueda
Life of this patent
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Abstract
Each of a first image processing unit and a second image processing unit is configured to generate print data to be used by a printing unit based on image data generated by a controller. The controller comprises a transmission control unit configured to select, based on a sheet size which is a print setting corresponding to a print job as a condition, one of first transmission control of controlling a transmission unit to alternately transmit band data included in first image data and band data included in second image data and second transmission control of controlling the transmission unit so that the band data included in the second image data will be transmitted after the band data included in the first image data has been transmitted.
Claims12
A printing apparatus comprising:
- a controller configured to obtain encoded image data;
- and
- a first image processing unit and a second image processing unit each of which is configured to generate print data to be used by a printing unit based on the encoded image data obtained by the controller, wherein a processing target area of the first image processing unit and a processing target area of the second image processing unit are different from each other in the encoded image data,
- wherein the controller comprises
- a decoder configured to decode first band data and second band data included in the encoded image data, wherein the first band data corresponds to a part of the processing target area of the first image processing unit and the second band data corresponds to a part of the processing target area of the second image processing unit;
- a transmission unit configured to transmit first band data decoded by the decoder to the first image processing unit, and to transmit second band data decoded by the decoder to the second image processing unit, and
- a transmission control unit configured (i) to, in a case where a sheet size of a print setting is a first sheet size, control the transmission unit to transmit the decoded second band data corresponding to at least one band included in the processing target area of the second image processing unit, during a period extending from a start of transmission of the decoded first band data corresponding to the processing target area of the first image processing unit to an end of the transmission of the decoded first band data corresponding to the processing target area of the first image processing unit, and
- (ii) to, in a case where the sheet size of the print setting is a second sheet size larger than the first sheet size, control the transmission unit to transmit all decoded first band data, then control the transmission unit to transmit all decoded second band data.
A control method executed in a printing apparatus that includes a controller configured to obtain encoded imaged data, and
- a first image processing unit and a second image processing unit each of which is configured to generate print data to be used by a printing unit based on the encoded image data obtained by the controller, wherein a processing target area of the first image processing unit and a processing target area of the second image processing unit are different from each other in the encoded image data,
- wherein the controller
- decodes first band data and second band data included in the encoded image data, wherein the first band data corresponds to a part of the processing target area of the first image processing unit and the second band data corresponds to a part of the processing target area of the second image processing unit,
- transmits first band data decoded in the decoding to the first image processing unit, and transmits second band data decoded in the decoding to the second image processing unit, and
- (i) in a case where a sheet size of a print setting is a first sheet size, performs control to transmit the decoded second band data corresponding to at least one band included in the processing target area of the second image processing unit, during a period extending from a start of transmission of the decoded first band data corresponding to the processing target area of the first image processing unit to an end of the transmission of the decoded first band data corresponding to the processing target area of the first image processing unit, and
- (ii) in a case where the sheet size of the print setting is a second sheet size larger than the first sheet size, performs control to transmit all decoded first band data, then to transmit all decoded second band data.
Dependencies are inferred from the claim text.