Patent ID: 6972806
Filing Date: 2005-12-06
Classification: H04N

Abstract:
1. A video signal processing apparatus for preventing data corruption from video related enhancements, comprising: a composite switch having a first video signal input coupled to a television tuner, a second video signal input coupled to an auxiliary video source, a third video signal input coupled to a source of luma signal from a S-video signal source, the composite switch providing an output video signal from a selected one of the video signal inputs in response to control signals from a controller coupled to the composite switch, the output video signal having a component that includes auxiliary data information; a comb filter coupled to the composite switch for comb filtering the output video signal to provide an output luma signal and an output chroma signal at respective first and second outputs; and a data processor, having an input coupled between the composite switch and the comb filter for receiving the video output signal and decoding auxiliary data included in the video output signal and providing a decoded output signal, wherein a first signal switch coupled to the comb filter and the S-video signal source for selecting either the output luma signal from the comb filter or the luma signal from the S-video signal source in response to a first control signal generated by the controller, a second signal switch coupled to the comb filter and the S-video signal source for selecting either the output chroma signal from the comb filter or the chroma signal from the S-video signal source in response to the first control signal generated by the controller, and the composite switch selecting a signal from one of the first, second, and third video signal inputs in response to the first control signal and a combination signal formed from the first control signal and a second control signal generated by the controller.