| 摘要 |
The economic efficiency of information coding and transmission depends in particular on the bandwidth and the time required for transmission. In order to code and transmit information in a reliable and economic manner, an additional effective combination code is provided, taking into account the object to be transmitted, for example in the case of telefax in particular the gray tone transmission. A multistage combination code with a constant phase position which precedes or follows the code elements and/or a different number of periods having identical or different durations is used as code, together with an amplitude code. An amplitude stage is used as redundant or quasi-stage for unambiguously identifying determined code combinations. In the case of gray tone coding and telefax transmission, conversion is transferred to the receiver according to the dither process, allowing quicker transmission. In all transmission cases, frequently repeated code elements, code words and lines in succession are condensed and the number of repetitions is coded and transmitted before or after the code elements, the code words or the coded lines. |
