Jbig Reception - Ricoh B230 Service Manual

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Video Data Path

5.3.2 RECEPTION

First, the FCU stores the incoming data from either an analog line to the SAF memory.

(The data goes to the FACE3 at the same time, and is checked for error lines/frames.)

The FCU then decompresses the data and transfers it to page memory. If image rotation

will be done, the image is rotated in the page memory. The data is transferred to the BICU.

If the optional G3 unit is installed, the line that the message comes in on depends on the

telephone number dialled by the other party (the optional G3 unit has a different telephone

number from the main fax board).

JBIG Reception

When data compressed with JBIG comes in on PSTN-1 (the standard analog line), the

data is sent to the QM-CODER for decompression. Then the data is stored in the page

memory, and transferred to the BICU.

When data compressed with JBIG comes in on PSTN-2 (optional extra analog line), the

data is sent to the QM-CODER on the SG3 board for decompression.

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