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US 6,608,704 B2Granted
Image communication apparatus with enhanced utilization of CPU
AssigneeCanon Kabushiki Kaisha
InventorsYuji Kurosawa, Teruyuki Nishii
Life of this patent
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Abstract
An ink jet printer function and other facsimile functions are controlled by one CPU. Specifically, the CPU performs a recording process and other FAX processes in time division through a task. Further, an ink remaining amount check function of an ink jet printer is performed with priority over other processes by a timer interrupt operation.
Claims10
An image communication apparatus comprising:
- receiving means for receiving, from an external source, image data corresponding to an image to be recorded, said receiving means having a function of storing/decoding thus-received image data;
- recording means for recording the image;
- recording head control means for controlling the operation of a recording head;
- and
- control means for controlling the whole apparatus,
- wherein said control means performs the parallel processing of an image data receiving process by said receiving means and an image data decoding process by said receiving means, a recording process by said recording means and a recording head control process by said recording head control means, by performing said processes for respective predetermined times, in order.
3 more elements
A control method for an image communication apparatus comprising:
- receiving, from an external source, image data corresponding to an image to be recorded, said receiving step being performed by means that have a function of storing/decoding thus-received image data;
- recording the image;
- and
- controlling the operation of a recording head,
- wherein said receiving step, including an image data decoding process, said recording step and said recording head control step are subjected to parallel processing by performing said steps for respective predetermined time periods, in order, under control of common control means.
2 more elements
An image communication apparatus comprising:
- receiving means for receiving an image;
- recording means for recording the image;
- recording head control means for controlling the operation of a recording head;
- and
- control means for controlling the whole apparatus,
- wherein said control means performs the parallel processing of said receiving means, said recording means and said recording head control means, and
- wherein said receiving means comprises memorizing means for memorizing an image received from the line, and decoding means for decoding said image, said recording means comprises first buffer means for temporarily accumulating said image, and second buffer means for accumulating H-V converted data into which data of said first buffer means is H-V converted, and said recording head control means comprises recording control means for reading and recording data within said second buffer means in accordance with the position of said recording head.
4 more elements
A control method for an image communication apparatus comprising:
- receiving an image;
- recording the image;
- and
- controlling the operation of a recording head,
- wherein said receiving step, said recording step and said recording head control step are subjected to parallel processing under control of common control means, and
- wherein said receiving step comprises a memorizing step for memorizing an image received from the line and a decoding step for decoding said image, said recording step comprises a first accumulation step for temporarily accumulating said image, and a second accumulation step for accumulating H-V converted data into which data accumulated at said first accumulation step is H-V converted, and said recording head control step comprises a recording control step for reading and recording data in said second buffer means in accordance with the position of said recording head.
3 more elements
Dependencies are inferred from the claim text.