| 摘要 |
An encryption device (1) encodes the original data and converts them into signals for an output device (5) which creates from this a document (6, 10). This is supplied to a transmitting device (12) which scans the data (7) line by line and converts the result into signals which are transmitted to a receiving device (13) via a transmission link (14). The receiving device (13) generates from the signals transmitted a copy (15) of the document (6, 10) which is supplied to a reader (17). This converts the data into signals for a decryption device (18) which decodes the data and converts them into signals for an output device (20). The output device (20) reproduces from these the original data and provides them for further processing. …<??>The transmitting device (12), the receiving device (13) and the transmission link (14) form a telecopying system. The data (7) are encoded in accordance with a code which is insensitive to transmission errors of the telecopying system and, in particular, distortions in the direction of the line feed. The code is preferably binary with logic values which produce brightness and/or colour contrasts, for example a bar code with bars (9) oriented in parallel with the line feed (8), and it can be read by a reader (17). …<??>Parts of this system are preferably integrated in a device at the transmitter or receiver end. …<IMAGE>… |
