| 摘要 |
A ciphering device (1) encodes the original data and converts it into signals for an output device (5) that creates a document (6, 10) out of them. This document is fed into a sending device (12) that scans the data (7) line by line and converts the result into signals that are transmitted to a receiving device (13) via a transmission link (14). The receiving device (13) produces a copy (15) of the document (6, 10) out of the transmitted signals, which is fed into a reading device (17). This device converts the data into signals for a deciphering device (18) which decodes the data and converts it into signals for an output device (20). From them, the output device (20) restores the original data and makes it available for further processing. The transmitting device (12), the receiving device (13) and the transmission link (14) form a telecopying system. The encoding of data (7) is done by using a code that is insensitive to transmission errors of the telecopying system and, in particular, to distortions in the line feed direction. The code is preferentially binary with logical values contrasting in brightness and/or color, for instance it is a bar code with bars (9) parallel to the line feed, and it can be read be a reading device (17). The parts of the system in a transmitting-end device or a receiving-end device are preferentially integrated.
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