H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/17, 363/23
H04J 3/06 (2006.01)
Patent
CA 1155981
DATA TRANSMISSION SYSTEM ABSTRACT OF THE DISCLOSURE A system for the transmission of data in which the transmitting station transmits in the form of batches numerical data originating from several channels. The batches from the different channels are time multiplexed and each batch includes a prefix containing, apart from standard synchronization and channel identification code signals, a batch format signal indicating the length of the sequence of the data which follows the prefix. The transmitting station includes as many couplers as channels, each coupler including an input circuit whose input is connected to the output of the channel associated with the coupler and whose output is connected to the input of a data memory whose output can be connected to a multiplexing circuit under control of a control circuit common to all the couplers, and a counter fed at a predetermined rate. An inhibition signal for the input circuit is given, either as soon as the memory is full, or as soon as the counter has reached a predetermined number. The format signal in the prefix has the value of the contents of the memory at the moment in time of the inhibition signal, after which the memory can be connected, via the control circuit, to the multiplexing circuit when the latter is free. The memory is then emptied, the counter cleared and the inhibition signal cancelled. The transmitting station includes a register arranged to count the data introduced into the data memory, the register having an adjustable maximum capacity depending on the standard of the broadcasting network over which the data is transmitted, the register initiating the inhibition signal of the input circuit when the level of the data reaches the maximum capacity.
332087
Etablissement Public de Diffusion Dit "telediffusion de France"
Etat Francais Represente Par Le Secretaire D'etat Aux Postes Et Telecommunicat
Pascal & Associates
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