Patent ID: 7042518

Claim:
A method for providing an enhanced video image signal from a video input signal, comprising: inverting the video input signal to provide an inverted video input signal; coupling the video input signal to a first high pass filter, wherein the first high pass filter has a first pass band that is defined by a first corner frequency; providing a first filtered signal with the first high pass filter, wherein the first filtered signal is generated in response to the video input signal; coupling the inverted video input signal to a second high pass filter, wherein the second high pass filter has a second pass band that is defined by a second corner frequency that is different from the first corner frequency; providing a second filtered signal with the second high pass filter, wherein the second filtered signal is generated in response to the inverted video input signal; and combining the first and second filtered signals to produce a filtered video output signal, whereby an image produced by the filtered video output signal is sharpened.