Color signal processing apparatus

Claim 2

A color signal processing apparatus comprising: (a) first delay means (22) for delaying an input chroma signal; (b) second delay means (23) operatively disposed for delaying an output of said first delay means (22); (c) a plurality of gain control means (24, 25, 26) operatively disposed for controlling the amplitudes of said input chroma signal and the output of said first delay means (22) and an output of said second delay means (23); and (d) operating means (27) operatively disposed for operating the gain-controlled amplitudes of said input chroma signal and the outputs of said first and second delay means (22, 23), wherein phases of the outputs of said first and second delay means (22, 23) are matched with a phase of said input chroma signal.

Claim 3

The apparatus of claim 1, wherein a delay time of said first and second delay means (22, 23) is an integer multiple of one wavelength of the chroma signal.

Claim 4

A color signal processing apparatus comprising: (a) first delay means (32) for delaying a chroma input signal to produce delayed output signal; (b) second delay means (33) connected in series to said first delay means (32) for delaying said delayed output signal of said first delay means (32); (c) first substracting means (34) operatively disposed for obtaining a first difference between the input and output signals of said first delay means (32); (d) second substracting means (35) operatively disposed for obtaining a second difference between the input and output signals of said second delay means (33); (e) first signal processing means (36, 38, 40) operatively disposed for processing said first difference signal to obtain a first enhanced signal; (f) second signal processing means (37, 39, 41) operatively disposed for processing said second difference signal to obtain a second enhanced signal ; (g) first adding means (42) operatively disposed for adding said first and second enhanced signals of said first and second signal processing means; and (h) second adding means (43) operatively disposed for adding an added enhanced signal of said first adding means (42) to the output signal of said first delay means (32).

Claim 5

A color signal processing apparatus comprising: (a) first delay means (32) for delaying a chroma input signal to produce delayed output signal; (b) second delay means (33) connected in series to said first delay means (32) for delaying said delayed output signal of said first delay means (32); (c) first substracting means (34) operatively disposed for obtaining a first difference between the input and output signals of said first delay means (32); (d) second substracting means (35) operatively disposed for obtaining a second difference between the input and output signals of said second delay means (33); (e) first signal processing means (36, 38, 40) operatively disposed for processing said first difference signal to obtain a first enhanced signal; (f) second signal processing means (37, 39, 41) operatively disposed for processing said second difference signal to obtain a second enhanced signal ; (g) first adding means (42) operatively disposed for adding said first and second enhanced signals of said first and second signal processing means; and (h) second adding means (43) operatively disposed for adding an added enhanced signal of said first adding means (42) to the output signal of said first delay means (32).

Claim 6

The apparatus of claim 3, wherein each of said first and second signal processing means comprises a limiter circuit (36; 37) a noise slicing circuit (38, 39), and a gain control amplifier (40, 41) connected in series.

Claim 7

The apparatus of claim 3 or 4, wherein phases of the input and output signals of said first delay means (32) are matched with each other.