Large capacity data storage device
AssigneeCanon Kabushiki Kaisha
InventorsHirofumi Nakajima, Koichi Ueda, Yuichiro Hattori, Ichiro Kuwana
Life of this patent
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Abstract
A data storage device includes a main memory into/from which data can be written or read out and an input/output device for receiving the data to be written into the main memory or generating the data read out from the main memory. An addressing device outputs first address data which represent an access address of the input/output device to the main memory on a basis of a unit composed of a predetermined number of data. A convertor converts the first address data into second address data representing an address in the main memory on a basis of single data and an address controller controls the access address of the input/output device to the main memory in accordance with the second address data.
Claims8
An image data storage device, comprising:
- (a) a data bus;
- (b) a main memory into which image data can be written via the data bus;
- (c) input means for inputting the image data to be written into said main memory in a byte unit composed of a plurality of bits corresponding to a pixel, said input means including packetizing means for packetizing the input image data so that each packet is composed of a plurality of bytes;
- (d) control means for controlling data transferring via the data bus so that said input means intermittently accesses said memory by means of the packet;
- and
- (e) determining means for variably determining a number of bytes corresponding to the packets in response to an operation of said control means.
An image data storage device comprising:
- (a) a main memory into which image data can be written;
- (b) input means for inputting the image data to be written into said main memory in a unit composed of a plurality of bits corresponding to a pixel, said input means including packetizing means for packetizing the input image data so that each packet is composed of a plurality of bytes;
- (c) designating means for designating an entire amount of the image data which is written into said main memory;
- (d) determining means for variably determining a number of bytes corresponding to the packet in accordance with the entire amount of the image data;
- and
- (e) control means for controlling said input means so that said input means intermittently accesses said main memory by means of the packet.
Dependencies are inferred from the claim text.