Encoder - OKIDATA OF2600 Service Manual

Page: 27
Service Guide OF2200/2400/2600
Chapter 1 Principles of Operation

1.2.05 Encoder

Scanned image data received by the board is sent to the encoder/decoder (ENC/DEC) integrated chip of
the main control board. The image data is compressed by the ENC/DEC according to the Modified
Huffman (MH) and Modified Read (MR) encoding scheme, or MH only. The use of MH only or both MH
and MR is determined by a function setting. Data is then stored in the FIFO area in one byte units. Fill bits
are inserted if the length of one encoded line is less than the minimum scan time of the remote unit. Data
is transferred to the network control unit, then sent to the line interface board for transmission over the
phone line.
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