Showing papers on "Synchronous Data Flow published in 1978"

HF transmission of coded digital speech signals - has series signal flow converted into parallel flow in blocks, applied to several sub-channels

Abstract: Signals are transmitted by TDM by a frequency shift keying modem. The transmitter converts the series data flow by a series-parallel multiplexer through a coder (FCS) into a parallel data flow divided in blocks and applied to a number of subchannels with different, discrete frequencies forming a frequency frame. A synchronism testing pattern is added to the synchronous data flow. This pattern is sequentially scanned in the receiver in each subchannel by a correlator, for derivation of synchronisation pulses which synchronise the subchannel data flow in the channel frame.