JPS58164381U - Delay line for comb filter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figure 1 is a diagram of the configuration principle of a comb filter, Figure 2 is an IHD
Figure 3 is a wiring diagram of L and its input/output circuit; Figure 3 is a diagram showing the in-band delay time characteristics that change depending on the selection of HDL input/output circuits; Figure 4 is a transient response of input/output signals of 1HDL and comb filter. Figure 5 is a diagram showing an example of the pass band amplitude characteristics of IHDL, Figure 6 is a diagram showing the configuration principle of a comb filter to explain the principle of the present invention, and Figure 7 is a diagram showing an example of the comb filter according to the present invention. FIG. 8 is a diagram illustrating the effect of a shape filter using color subcarriers, and is a configuration diagram showing an embodiment of the present invention. 2...IHDL, 3...Adder, 4.
...Subtractor, 13.14 ...0.140
A delay line corresponding to microseconds, a delay line of 21... (1 horizontal period - 172 color subcarrier periods). J I Q bar lt doo 511Q − (α) l po = l /iii
X number of cycles (MHI) Off-i Hea, t4aps B H8l

Claims (1)

[Scope of utility model registration request] In a delay line for configuring a comb filter by adding means for adding or subtracting both the input signal and an output signal obtained by delaying this input signal through one path, A delay line for a comb-shaped filter, characterized in that it has a delay time equal to one horizontal period of an NTSC color television signal minus a half period of a color subcarrier of the television signal.