Patent ID: 6483549
Filing Date: 2002-11-19
Classification: H04N

Abstract:
A video signal processing apparatus, comprising:a receiver receiving an incoming video signal, said receiver further producing an output video signal in response thereto; a limit setup unit setting up at least one of an upper limit value and a lower limit value for said output video signal; and a limiter supplied with said output video signal from said receiver and further with at least one of said upper limit value and said lower limit value from said limit setup unit, said limiter limiting a level of said output video signal produced by said receiver, by comparing said level of said output video signal according to any of said upper limit value and lower limit value; wherein said video signal processing apparatus is supplied with said video signal in the form of a first analog component signal and a second analog component signal, and wherein said limit setup unit includes an upper limit setup unit setting up said upper limit value, said limiter including: a voltage divider supplied with said second analog component signal and dividing said second analog component signal to form a voltage-divided second analog component signal; a comparator supplied with a sum of said first analog component signal and one of said second analog component signal and said voltage-divided second analog component signal as an input signal, said comparator being further supplied with said upper limit value from said upper limit setup unit and comparing said input signal with said upper limit value; and a selector supplied with an output of said comparator, said selector being further supplied with said second analog component signal and said voltage-divided second analog component signal and selectively outputting said voltage-divided second analog component signal when said sum exceeds said upper limit value.