Abstract: The metrological device, for example for a broadcasting network, for monitoring an upline broadcast signal includes a main component and upline control data. The metrological device includes an extraction circuit for extracting the upline control data from the upline broadcast signal and delivering an upline instruction, and a measuring circuit for measuring a parameter of the upline broadcast signal according to the upline instruction and delivering a measurement result. A control circuit produces a downline instruction from the measurement results and an upline result produced by the extraction circuit from the upline control data, and an insertion circuit produces a downline signal to broadcast comprising firstly the main component of the upline broadcast signal and secondly the downline control data containing the downline instruction.

Abstract: The invention relates to a method of transmitting an audio and/or video program via a transmission channel at adjustable bit rates, the method implementing an adjustment of at least one encoding and/or transmission parameter as a function of at least one setpoint vector having at least one dimension and representing a quality of reception desired by said end user.

Abstract: The invention concerns a metrological device (200) for monitoring an upline broadcast signal comprising a main component and upline control data. The metrological device (200) includes an extraction circuit (220) for extracting the upline control data from the upline broadcast signal and delivering an upline instruction, and a measuring circuit (230) for measuring a parameter of the upline broadcast signal according to the upline instruction and delivering a measurement result. In accordance with the invention, the metrological device (200) also includes: a control circuit (250) for producing a downline instruction from the measurement results and an upline result produced by the extraction circuit (220) from the upline control data, an insertion circuit (240) for producing a downline signal to broadcast comprising firstly the main component of the upline broadcast signal and secondly the downline control data containing the downline instruction.