JPS643282U - - Google Patents
Info
- Publication number
- JPS643282U JPS643282U JP9573387U JP9573387U JPS643282U JP S643282 U JPS643282 U JP S643282U JP 9573387 U JP9573387 U JP 9573387U JP 9573387 U JP9573387 U JP 9573387U JP S643282 U JPS643282 U JP S643282U
- Authority
- JP
- Japan
- Prior art keywords
- color signal
- comb
- filter
- signal output
- circuit
- 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
- 238000000926 separation method Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案の一実施例に係わるＹ／Ｃ分離
回路の構成を示すブロツク図、第２図は第１図の
Ｙ／Ｃ分離回路中の各部の信号波形を例示する波
形図、第３図は第１図中のクロマ・ノツチフイル
タ１２とクロマ・ノツチ制御回路１４の構成の一
具体例を示す回路図、第４図は従来のＹ／Ｃ分離
回路の構成を示すブロツク図である。
１１……くし形フイルタ、１２……クロマ・ノ
ツチフイルタ、１３……帯域通過濾波回路、１４
……クロマ・ノツチ制御回路、１４ａ……低域通
過濾波回路、１４ｂ……増幅回路、１４ｃ……絶
対値回路。
FIG. 1 is a block diagram showing the configuration of a Y/C separation circuit according to an embodiment of the present invention, FIG. 2 is a waveform diagram illustrating signal waveforms of various parts in the Y/C separation circuit of FIG. FIG. 3 is a circuit diagram showing a specific example of the structure of the chroma notch filter 12 and chroma notch control circuit 14 shown in FIG. 1, and FIG. 4 is a block diagram showing the structure of a conventional Y/C separation circuit. 11...Comb filter, 12...Chroma notch filter, 13...Band pass filter circuit, 14
...Chroma notch control circuit, 14a...Low pass filter circuit, 14b...Amplification circuit, 14c...Absolute value circuit.
Claims (1)
され、色副搬送波帯域の周波数成分の通過を選択
的に阻止する阻止機能可変の色信号阻止用濾波回
路と、 前記くし形フイルタの色信号出力端子から出力
される色信号中に含まれる抵域成分の振幅を検出
し、この振幅が増加するほど前記色信号阻止用濾
波回路の阻止機能を強調させる色信号阻止機能制
御回路とを備えたことを特徴とするＹ／Ｃ分離回
路。[Claims for Utility Model Registration] A comb-shaped filter, and a color signal blocking filter connected to the luminance signal output terminal of the comb-shaped filter and having a variable blocking function that selectively blocks the passage of frequency components in the color subcarrier band. detecting the amplitude of a resistance component included in the color signal output from the color signal output terminal of the comb-shaped filter, and emphasizing the blocking function of the color signal blocking filter circuit as the amplitude increases; A Y/C separation circuit comprising a color signal blocking function control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9573387U JPS643282U (en) | 1987-06-22 | 1987-06-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9573387U JPS643282U (en) | 1987-06-22 | 1987-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS643282U true JPS643282U (en) | 1989-01-10 |
Family
ID=31320442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9573387U Pending JPS643282U (en) | 1987-06-22 | 1987-06-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS643282U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS611983B2 (en) * | 1977-05-16 | 1986-01-21 | Tokyo Shibaura Electric Co |
-
1987
- 1987-06-22 JP JP9573387U patent/JPS643282U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS611983B2 (en) * | 1977-05-16 | 1986-01-21 | Tokyo Shibaura Electric Co |
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