JPS6129582U - comb filter circuit - Google Patents
comb filter circuitInfo
- Publication number
- JPS6129582U JPS6129582U JP11251584U JP11251584U JPS6129582U JP S6129582 U JPS6129582 U JP S6129582U JP 11251584 U JP11251584 U JP 11251584U JP 11251584 U JP11251584 U JP 11251584U JP S6129582 U JPS6129582 U JP S6129582U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- output
- band
- period
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Processing Of Color Television Signals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【図面の簡単な説明】
第１図は本考案に係るくし形フィルタ回路を示すブロッ
ク図、第２図は第１図の回路動作を説明する説明図、第
３図はＮＴＳＣ方式の複合映像信号の周波数関係を示す
説明図、第４図はくし形フィルタによる輝度信号及び色
信号の分離方法を原理的に説明する説明図、第５′図は
従来の−くし形フィルタの構成を示すブロック図、第６
図は第５図の動作を説明する説明図、第７図は第５図に
おいてＩＨ前後で信号に相関がない場合の動作を説明す
る説明図である。
１・・・入力端子、２・・・ＩＨ遅延素子、ａ，１３，
１６・・・反転増幅器、４，６・・・加算器、５・・・
色信号出力端子、７・・・３．５３ＭＨｚのトラップ回
路、８，９・・・スイッチ回路、１ｏ・・・輝度信号出
力端子、１１・・・低域通過フィルタ、１２．１４・・
・コンパレータ、１５・・・オア回路、ＶＲ・・・比較
電圧。[Brief Description of the Drawings] Figure 1 is a block diagram showing a comb filter circuit according to the present invention, Figure 2 is an explanatory diagram explaining the circuit operation of Figure 1, and Figure 3 is an NTSC system composite video signal. FIG. 4 is an explanatory diagram illustrating the principle of a method for separating luminance signals and color signals using a comb filter, and FIG. 5' is a block diagram showing the configuration of a conventional comb filter. 6th
This figure is an explanatory diagram for explaining the operation of FIG. 5, and FIG. 7 is an explanatory diagram for explaining the operation when there is no correlation between the signals before and after IH in FIG. 1... Input terminal, 2... IH delay element, a, 13,
16... Inverting amplifier, 4, 6... Adder, 5...
Color signal output terminal, 7... 3.53 MHz trap circuit, 8, 9... Switch circuit, 1o... Luminance signal output terminal, 11... Low pass filter, 12.14...
・Comparator, 15...OR circuit, VR...comparison voltage.
Claims (1)
入力し一水千期間遅延させる遅延回路と、前記複合映像
信号とこの信号を一水千期間遅延させた信号とを加算す
る加算回路と、前記複合映像信号とこの信号を一水千期
間遅延させた信号とを減算する減算回路と、この減算回
路からの出力に基づいて一水平期間前後での信号の相関
の有無を検出し制御信号を作成する回路と、前記加算回
路からの出力の信号帯域を制限し色信号成分を除去する
帯域制限回路と、前記制御信号を用いて前記加算回路か
らの信号と前記帯域制限回路からの信号とを切り換えて
出力する切換回路とを具備し、一水千期間の前後で信号
に相関がある場合には前記加算回路からの信号を出力し
、相関がない場合には前記帯域制限回路からの信号を出
力するように構成したことを特徴とするくし形フィルタ
回路。a delay circuit that inputs an NTSC composite video signal on which a color subcarrier is superimposed and delays it for a period of 10,000 seconds; an adder circuit that adds the composite video signal and a signal obtained by delaying this signal for a period of 1,000 days; A subtraction circuit that subtracts the composite video signal and a signal obtained by delaying this signal by one hundred and one thousand periods, and based on the output from this subtraction circuit, detects whether or not there is a correlation between the signals before and after one horizontal period, and generates a control signal. a circuit to be created, a band-limiting circuit that limits the signal band of the output from the adder circuit and removes the color signal component, and a signal from the adder circuit and a signal from the band-limiter circuit using the control signal. and a switching circuit for switching and outputting, and if there is a correlation between the signals before and after the one water period, the signal from the adding circuit is output, and if there is no correlation, the signal from the band limiting circuit is output. A comb filter circuit characterized in that it is configured to output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11251584U JPS6129582U (en) | 1984-07-26 | 1984-07-26 | comb filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11251584U JPS6129582U (en) | 1984-07-26 | 1984-07-26 | comb filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6129582U true JPS6129582U (en) | 1986-02-22 |
Family
ID=30671565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11251584U Pending JPS6129582U (en) | 1984-07-26 | 1984-07-26 | comb filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6129582U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376690A (en) * | 1986-09-19 | 1988-04-06 | Victor Co Of Japan Ltd | Color video signal processing circuit |
| JPS6393290A (en) * | 1986-10-08 | 1988-04-23 | Victor Co Of Japan Ltd | Color video signal processing circuit |
| JPH02117270U (en) * | 1989-03-09 | 1990-09-19 |
-
1984
- 1984-07-26 JP JP11251584U patent/JPS6129582U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376690A (en) * | 1986-09-19 | 1988-04-06 | Victor Co Of Japan Ltd | Color video signal processing circuit |
| JPS6393290A (en) * | 1986-10-08 | 1988-04-23 | Victor Co Of Japan Ltd | Color video signal processing circuit |
| JPH02117270U (en) * | 1989-03-09 | 1990-09-19 |
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