| 摘要 |
<p>A data handling device for handling data defining the colour content of pixels of an image comprises a data bus (3) connected to a number of data transfer interfaces (11, 12, 16 - 18, 18 min ) including a first interface (16 - 18, 18 min ) for connection to at least two disk stores, and at least one second interface (11, 12) for connection to one of a data source and a data destination. An address generator (21) and a bus arbitrator (20) control the transfer of data between selected pairs of the interfaces. A buffer (19) is connected to the data bus (3). The address generator (24) and bus arbitrator (20) cause data defining successive n x m pixel blocks, where both n and m is greater than one, to be stored on different disk stores connected to the first interface (16 - 18, 18 min ) in use; control the transfer of data between selected pairs of the interfaces via the buffer (19) such that each transfer is carried out in a number of subsidiary transfer operations; and predetermine the duration of the subsidiary transfer operations for each interface and the amount of memory required in the buffer (19) to be allotted to each transfer operation whereby the transfer of data via each interface is substantially optimised.</p> |
