An NTSC Video Signal receiver with reduced sensitivity to interference from Common Channel Digital Television Signals

摘要

A video signal receiver with reduced sensitivity to interference Signal of digital television channels Common built with a Main aspect of the invention inIncludes entry to select join nal Circuits of Amplitude Modulation in bandalateral residualdescriptiva of a video signal.That converts the signal Amplitude Modulation vestigial sideband Signal at an intermediate Frequency.And amplificadicha frecuenciaint ermedia First Signal to provide a First Intermediate Frequency signal is Amplified.The Signal Amplitude Modulation ofbanda lateral residual in the form in which it is originally received,Includes a Carrier and a video of a band to Band lateralcompleta other lateralresidual.The Signal Amplitude Modulation vestigial sideband is selected from any one of multiple channels, at least one of the cualesestu00e1 subject to contain sometimesInterference decanals com unes originated in a digital television Signal.The Circuits of sincrodinizacion videodetectan synchronously Amplified Signal of intermediate Frequency signal on the video Carrier,To generate a response dedeteccionsin in chronic phase and to generate a response of Synchronous Detection in phase Quadrature.All the frequency components of the Synchronous forquick response in phase Quadrature over a Set Frequency Spectrum sondesplazados R Phase substantially 90s poA reverse Hilbert Filter DETRANSFORMACION R and are combined linearly with Synchronous Detection in the phase response with appropriate delay to recover lasporciones of frecuenciamu00e1s baJa Video Signal described in both the lateral and the complete residual sideband Signal amplitude modulacionde vestigial sideband,Substantially free of artifacts of any television Signal with interferen CIA Common Channel.Segunse used in this specification and Claims attached to it, the term linear Combiner is a generic term to describe a