Method and system for transferring image data between two device

Details Method and system for transferring image data between two device Method and system for transferring image data between two device

1994-04-01

1996-11-05

Vu, Kim

Facsimile and static presentation processing

Facsimile

Facsimile system interface

358409, 358404, 39520013, 395250, H04N 136, H04N 100, H04N 132, H01J 100

Patent

active

055723357

ABSTRACT:
An image input terminal synchronously transfers image data to a host terminal when the internal data transfer rate of the image input terminal exceeds the data transfer rate of the host terminal. The image input terminal scans the document at a constant rate, but the constant rate is slower than the normal scan rate for the image input terminal, thereby effectively scanning the document at a higher resolution. To realize an apparent internal data transfer rate equal to the data transfer rate of the host terminal, the image input terminal periodically discards or skips scanlines of valid image data to give the host terminal ample time to complete the transfer of valid image data. The image input terminal, to facilitate a synchronous transfer of image data, will skip N-1 scanlines of valid image data out of N scanlines of valid image data such that N is determined by the data transfer rate of the host terminal.

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