Abstract: A method for generating a frequency-modulated signal with high receivability quality, comprising the steps of: before sending an input modulating signal to a modulator, modifying the input modulating signal so as to compensate for distortions which will be introduced in the modulated signal receiving section.

Abstract: A method for reducing computational errors in a useful band of a signal generated with a Fourier transform, particularly for fixed-point microprocessors, which comprises a step of shifting errors present in a signal due to Fourier transforms applied thereto, so that the errors straddle a frequency in which the information content of the signal is irrelevant.

Abstract: A method for converting a real signal into a complex signal inherently in quadrature, whose particularity consists of the fact that it comprises the step that consists in adding to a real signal meant to be converted into a complex signal a signal whose frequency is four times the band-center frequency of the signal to be converted, in order to obtain an inherent quadrature.

Abstract: A method for decoding a suppressed-carrier modulated signal in the presence of a pilot tone, comprising the steps of:extracting the pilot signal from the modulated signal;obtaining the suppressed carrier by multiplying the pilot signal by the pilot signal in quadrature;adjusting the level of the suppressed carrier; andreconstructing the modulating signal.

Abstract: A method for individually adjusting levels of signals in an operation for mixing the signals using a multichannel mixer, in which the level of each signal corresponds to the position of a corresponding slider, comprising the steps of: computing the total sum of the values that correspond to the positions of the corresponding sliders; calculating the percentage contribution of each signal, which corresponds to the position of each slider, with respect to the total sum; and adding the signals so as to obtain a resulting signal whose value is within a preset dynamic range which is allowable for the resulting signal.

Abstract: The method for generating a modulated television signal involves performing a first filtering and a second filtering to obtain two signals, one having a passband that is equal to complete passband and the other one having a passband that is equal to the sideband to be suppressed. The signal having a complete passband is amplitude-modulated with a video carrier, obtaining a first signal. The signal having a passband equal to the sideband to be suppressed is then divided into a first component and a second component, and the first component is phase-shifting by 90.degree. with respect to the second component. The first component is modulated with a video carrier that is phase shifted by 90.degree., obtaining a second signal. The second component of the signal having a passband equal to the sideband to be suppressed is modulated with the video carrier, obtaining a third signal. The second and third signals are then subjected to an algebraic sum, obtaining a fourth signal.

Abstract: The method envisages performing a first filtering and a second filtering of a video signal to obtain two signals, one signal having a passband that is equal to the complete band and a bandwidth that is a function of the frequency, and another signal whose passband is equal to the side band to be suppressed, and amplitude-modulating the signal having a complete passband with a video carrier, obtaining a first signal. The signal whose sideband is equal to the band to be suppressed is phase-shifted by 90.degree. and modulated with the video carrier phase-shifted by 90.degree., obtaining a second signal. The algebraic sum of the first signal and of the second signal obtains a third signal that represents the television signal having the desired side band.