Patent ID: 6226046
Filing Date: 2001-05-01
Classification: H04N,Y10S

Abstract:
A video signal discriminating circuit comprising:a signal-to-noise (S/N) ratio discriminating means for detecting a noise level of a video signal and discriminating an S/N ratio from a noise level of said video signal;wide screen discriminating means for discriminating about a standard screen or a wide screen by the presence or absence of upper and lower black stripes of said video signal; anda low pass filter through which said video signal is allowed to pass,wherein said video signal transmitted through said low pass filter is supplied to said wide screen discriminating means, the presence or absence of the upper and lower black stripes of said video signal is detected by said wide screen discriminating means, thereby discriminating whether the screen is the standard screen or the wide screen, andwherein a characteristic of said low pass filter is set in accordance with an output of said S/N ratio discriminating means.