Patent ID: 7068327
Filing Date: 2006-06-27
Classification: H04N

Abstract:
1. A video encoder for combining a color signal and a luminance signal including a frequency component of the color signal to generate a composite video signal, comprising: a level adjustment circuit for adjusting the output level of the generated composite video signal based on a setting value; an encoding unit for performing predetermined filtering with respect to an input luminance signal and color signal and modulating the color signal; a trap circuit for removing the frequency component of the color signal included in the luminance signal output from the encoding unit and outputting the result; a selector for selecting either of the luminance signal output from the encoding unit or the luminance signal output from the trap circuit in accordance with a control signal; and a combining circuit for combining the luminance signal selected by the selector and the color signal output from the encoding unit to generate the composite video signal, wherein the control signal instructs the selector to select the output luminance signal of the trap circuit when the raw video has a large cross-color effect and to select the output luminance signal of the encoding unit when the cross-color effect is small, and wherein the trap circuit comprises: a band pass filter having a frequency of the carrier of the color signal as a center frequency, and a subtractor for subtracting the luminance signal and the output signal of the band pass filter.