| 摘要 |
PURPOSE:To prevent the deterioration in the picture quality of a reproduced picture by providing a band emphasis/attenuation circuit emphasizing a prescribed band at low frequencies of a chrominance carrier signal band and attanuating the chrominance carrier band. CONSTITUTION:An input video signal Vi is delayed at a delay circuit 21 by 1 horizontal period, an output signal of a subtraction circuit 22 is attenuated by an attenuation circuti 23 by 1/2, a signal Cy obtained at a terminal 20c includes a luminance signal component to a chromiance carrier signal, and a signal Yc obtained at an output terminal 20y of a subtraction circuit 24 includes a chrominance carrier signal component to the luminance signal. An emphasized luminance signal component at a mid-frequency between frequencies being an integral number of multiple at low and mid-band is obtained at an output terminal 30e of a band emphasis/attenuation circuit 30. A luminance signal Yo with emphasized signal component at the frequency between frequencies being an integral number of multiple of the horizontal frequency at the mid-band is obtained at an output terminal 50 of an adder 40 and a chromiancne carrier signal is led at a terminal 70 via a band pass filter 60.
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