Method and television device with time division multiplex.

摘要

A high-definition television programme broadcasting method compatible with the D2-MAC/PACKETS standard which uses a time-division multiplex of analog picture signals and of digital sound and data signals, consists in including in the multiplex supplementary assistance data associated with the MAC picture, in the form of bursts with instantaneous throughput equal to 20.25 Mbits/s transmitted instead of the picture signals for certain at least of the frame-blanking lines. A receiver of such a programme includes a channel for recovering and decoding the supplementary assistance data, comprising a low-pass filter (72), a 20.25 MHz sampling circuit fed by the clock-recovery and duobinary decoding channel (74), and a circuit for processing the said data. <IMAGE>