Electronic circuit apparatus for separating the luminance and color information of a color television signal
Separating circuit of luminance and chrominance signals for TV receiver selecting between three three line comb filters
Digital composite color video signal separating circuit with vertical correlation weighting function
NTSC compatible TV signal transmitting system for improving vertical resolution
Still more feature for improved definition television digital processing units, systems, and methods
Luminance/chromaticity signal separation circuit for composite video signal
Video signal processing system with selective signal extraction and delay
Spectrum distribution luminance/color signal separating device
Luminance/chrominance signal separating apparatus which attenuates chrominance signal based on phase change of chrominance signal
Motion adaptive luminance signal and color signal separation filter
ApplicationNo. 10008821 filed on 11/13/2001
US Classes:348/663, Chrominance-luminance signal separation348/669, Including frame or field delays (e.g., motion adaptive)348/447, Field rate type flicker compensating348/24, PLURAL STILL IMAGES OVER CONVENTIONAL CHANNEL348/665, Including comb filter (e.g., using line, field, frame delays)348/609, Reduction of chrominance luminance cross-talk (e.g., precomb)348/668Selects or blends two or more separated signals to derive output
ExaminersPrimary: Natnael, Paulos M.
Attorney, Agent or Firm
Foreign Patent References
AbstractAn apparatus for separating luminance and chrominance signals from an NTSC composite video signal includes first through fourth delayers connected to a digital composite video signal in series for delaying input signals each by 1, a first filter for separating a first chrominance signal from signals output from the first and second delayers; a second filter for separating a second chrominance signal from signals output from the second and third delayers, a vertical edge direction detector for detecting a vertical edge direction by receiving signals output from the second and fourth delayers and receiving the digital composite video signal, a multiplexer for outputting one of the first and second chrominance signals based on a signal output from the vertical edge direction, a chrominance signal outputting unit for receiving the output of the multiplexer and then outputting a perfect chrominance signal, and a luminance signal outputting unit for receiving the signal of the second delayer and receiving the chrominance signal and then outputting a perfect luminance signal. Using the apparatus, cross-luminance and cross-chrominance can be substantially eliminated from the chrominance and luminance signals.