Pirelli Cavi E Sistemi S.p.a.

Pirelli Cavi S.p.a.

Sisvel Technology S.r.l.

Societa' Italiana Per Il Gas P.a.

Franco Mussino

Claudio Zammarchi

Giuseppe Ravasio

Saverio Celia

Pietro Porzio Giusto

Massimo Notargiacomo

Gianluca Gobetti

Pietro Belisomi

Marco Roccato

A method for displaying a video stream according to a format defined by a user, wherein a graphic element is superimposed on the displayed video stream, and wherein the dimensions and/or position of the graphic element are modified as a function of commands received from the user, so as to define a screen area in which a certain portion of the frames of the video stream is displayed. The video stream is then displayed in a format wherein, for each frame, the frame portion defined by the graphic element is displayed with altered dimensions and/or position on the screen.

Method for displaying a video stream according to a customised format

The present invention relates to a method and to a signal predistorter circuit for eliminiating the nonlinearities in the input/output characteristics of nonlinear stages, in particular for eliminating the third-order nonlinearities. More particularly, it relates to a method and to a predistorter circuit for external optical modulators of television signals. The method for predistortion of a signal of variable amplitude comprises the phases of: delivering the said signal to at least one first distorter circuit; biasing the said at least one first distorter circuit; distorting the said signal in the said at least one first distorter circuit; characterized in that the said phase of biasing the said at least one first distorter circuit comprises the phase of maintaining a substantially constant preset voltage value on varying the amplitude of the said signal at the said at least one first distorter circuit.

External optical modulation system comprising a predistorter

An analog-external-modulation optical, emitter is described which comprises an electro-optical modulator and a piloting circuit. The piloting circuit comprises a pilot-tone-generating circuit; an electric control signal generated by the optical signal coming out of the modulator and a predetermined bias voltage are fed to the input of a differential amplifier the output of which is added to the pilot tone to feed an electric input of the electro-optical modulator. The RF input of the analog electric signal is connected to a linearizer circuit to which the pilot-tone-generating circuit is also connected. The output of the linearizer circuit is sent to an electric input of the electro-optical modulator through a band-stop filter adapted to eliminate the pilot tone downstream of the linearizer circuit.

Bias system in an optical CATV modulator

A method for the improvement of distribution network management, in particular of a gas, water, electric energy or heat network that provides the possibility of telemetry of data by means of a central station and a plurality of peripheral stations connected to the central station. The relevant data is subsected to simultaneous reading of a plurality of peripheral stations and the successive transmission of such data to the central station.

Method and network for operating a distribution network

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Turin, Italy

Franco Mussino