Data transfer device
AssigneeSony Corporation
InventorNorio Ishibashi
Life of this patent
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Abstract
A data transfer device (10) converts the data stream input to it by IEEE 1394 isochronous transmission from an image processing device (20) connected to it into data in a color signal mode adapted to PCI transfer by means of a converter circuit (219), while controlling an address of PCI bridge circuit (216B) as bus master, transmits the image data from the converter circuit (219) to a graphic memory (221) by DMA transmission by way of a PCI bus (215) and writes the data in the graphic memory (221) by means of a graphic control circuit (220). It then reads the image data from the graphic memory (221) by means of the graphic control circuit (220) and transfers the data to an electronic device (30).
Claims16
A data transfer device for transferring the image data input from an image processing device to an electronic device, said device comprising:
- a conversion processing section for performing a predetermined conversion processing operation on the image data input from said image processing device;
- a graphic memory for temporarily storing the image data;
- a graphic control circuit for writing the image data transmitted from said conversion processing section into said graphic memory or reading the image data stored in said graphic memory and transmitting it to said electronic device;
- and
- a CPU for selecting a first data transmission route for transmitting the image data from said conversion processing section to said graphic control circuit or a second data transmission route for transmitting a control signal to said graphic control circuit;
- said conversion processing section being adapted to convert the image data input from said image processing device into an output format.
Dependencies are inferred from the claim text.