DIGITAL DEVICE FOR SEPARATING BRIGHTNESS AND COLOR SIGNALS IN SECAM SYSTEM DECODER Russian patent published in 1994 - IPC

FIELD: TV engineering. SUBSTANCE: device has analog-to-digital converter 1, unit 2 for separating total color videosignal to low-frequency and high-frequency components, two delay units 3,6, adder 4, two digital-to-analog converters 5,8, subtracter 7, two multipliers 9, 11, tuneable band-pass filter 10, complex frequency-modulated signal generator 12, differentiating unit 13, control signal former 14, complex signal frequency detector 15. Availability of tracking separation of color signal combined with frequency feedback, which reduces deviation of initial signal and availability of tracking rejection of color signal spectrum simultaneously with dynamic change in brightness band depending on peak-to-peak amplitude of brightness signal, allows to separate signals of color and brightness without distortion. High-frequency component of total color videosignal is transferred to the frequency. EFFECT: excluded distortion. 1 dwg