Patent ID: 7158191
Filing Date: 2007-01-02
Classification: H03G,H03J,H04N

Abstract:
1. A video signal processing apparatus comprising: one or more burst signal sampling means for extracting one or more burst signals from one or more video signals; one or more level converting means for converting to DC voltage or voltages at least one variable intensity level of at least one of the burst signal or signals extracted by at least one of the burst signal sampling means; and one or more image quality correcting means for causing at least one of the DC voltage or voltages obtained as a result of conversion by at least one of the level converting means to be fed back into one or more compensator subcircuits of one or more input tuning circuits so as to permit correction of frequency characteristics of at least one of the video signal or signals such that intensity level at one or more high frequency bands is constant relative to intensity level at one or more low frequency bands, wherein at least one of the compensator subcircuit or subcircuits includes one or more input tuning variable capacitance diodes; one or more sets of one or more capacitors connected in series to one or more variable capacitance diodes are connected in parallel to at least one of the input tuning variable capacitance diode or diodes; and at least one of the DC voltage or voltages is supplied by way of one or more intervening resistors to the cathode side of at least one of the input tuning variable capacitance diode or diodes.