Method and device for generating a modulated television signal

Details Method and device for generating a modulated television signal Method and device for generating a modulated television signal

1996-03-06

1998-10-13

Kostak, Victor R.

Television

Television transmitter circuitry

Modulator

455 47, H04N 540

Patent

active

058220208

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.

REFERENCES:
patent: 3955155 (1976-05-01), Behrend
patent: 4533960 (1985-08-01), Tiemann
patent: 4622694 (1986-11-01), Weber

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