methods to reduce of low-frequency zitterkomponenten in a digital data transmission system

摘要

The invention relates to a procedure for reducing the low-frequency component of the jitter in a timing signal reconstituted at the output of a digital data transmission system of the type comprising at its input a higher-order multiplexer receiving at least one digitised data stream organised into a block and introduced with a specified timing, the said multiplexer transmitting each data block into a digital multiplexer towards the output of the transmission system via a digitised data transmission channel after a variable multiplexing delay, characterised in that: … …  a) a multiplexing delay is measured for the transmission in progress of a data block into the multiplex, …  b) the measured multiplexing delay is compared with a chosen reference value in order to determine a multiplexing delay deviation and if necessary in order to defer the said transmission in progress, …  c) steps a) and b) are repeated for the succeeding transmission of a data block into the multiplex while taking into account in step b) the multiplexing deviations determined for the preceding transmissions. …IMAGE… …