Method of coding and decoding of the synchronous serial transmission, preferably in the energy saving devices and in the optical fibre connections

摘要

A method of encoding and decoding of serially transmitted data is disclosed for telecommunication links where at least one neutral symbol is available, comprising of alternatively sending payload symbols interleaved with neutral symbols. According to present invention clock is recovered from such encoded transmission by detection of neutral symbols on the line, allowing receiver to operate without precise local reference clock generators or phase locked loop. In case when physical layer have two or more neutral symbols available, present invention allows for transport of additional symbols (like frame demarcation symbols), and for multiplexing of two separate payload data- streams at the level of physical layer. Also disclosed is a method of encoding payload data, transport clock and frame demarcation symbols, when transmission link consists of only two physical circuits.