JPS6390386U - - Google Patents
Info
- Publication number
- JPS6390386U JPS6390386U JP18566186U JP18566186U JPS6390386U JP S6390386 U JPS6390386 U JP S6390386U JP 18566186 U JP18566186 U JP 18566186U JP 18566186 U JP18566186 U JP 18566186U JP S6390386 U JPS6390386 U JP S6390386U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- color
- absolute value
- subtracter
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims 3
- 230000004069 differentiation Effects 0.000 claims 2
- 230000001934 delay Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は第１図におけるノツチフイルタの周波数
特性図、第３図は本考案の他の実施例の要部を示
すブロツク図である。
主要部分の符号の説明、４…くし形フイルタ、
５…ノツチフイルタ、７，２３…乗算器、９…色
変化分検出回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a frequency characteristic diagram of the notch filter shown in FIG. 1, and FIG. 3 is a block diagram showing the main parts of another embodiment of the present invention. Explanation of symbols of main parts, 4...Comb filter,
5... Notch filter, 7, 23... Multiplier, 9... Color change detection circuit.
Claims (1)
号とを分離するくし形フイルタと、色信号周波数
を中心周波数としかつ前記輝度信号を入力とする
バンドパスフイルタと、前記バンドパスフイルタ
の出力信号を前記輝度信号から減ずる減算器とを
含むＹ―Ｃ分離回路であつて、色信号の水平方向
及び垂直方向の少なくとも一方の変化分を検出す
る色変化分検出回路と、前記色変化分検出回路か
らの変化分情報を前記バンドパスフイルタの出力
信号に乗じて前記減算器の減算入力とする乗算器
とを備えたことを特徴とするＹ―Ｃ分離回路。 (2) 前記色変化分検出回路は、映像信号の色差
信号を１Ｈ（水平走査期間）相当時間だけ遅延せ
しめる遅延回路と、この遅延回路の出力信号と前
記色差信号とを減算する減算器と、この減算器の
出力信号を絶対値化する第１の絶対値回路と、前
記色差信号を微分する微分回路と、この微分回路
の出力信号を絶対値化する第２の絶対値回路と、
前記第１及び第２の絶対値回路の各出力信号のう
ち信号レベルの大なる方を選択して前記変化分情
報とするセレクタとを有することを特徴とする実
用新案登録請求の範囲第１項記載のＹ―Ｃ分離回
路。[Claims for Utility Model Registration] (1) A comb filter that separates a luminance (Y) signal and a color (C) signal from a video signal, and a band whose center frequency is the color signal frequency and whose input is the luminance signal. A color change circuit that detects a change in at least one of a horizontal direction and a vertical direction of a color signal, the Y-C separation circuit including a pass filter and a subtracter that subtracts the output signal of the band pass filter from the luminance signal. Y-C separation, comprising: a color change detection circuit; and a multiplier that multiplies the output signal of the bandpass filter by the color change information from the color change detection circuit and uses the result as a subtraction input of the subtracter. circuit. (2) The color change detection circuit includes a delay circuit that delays the color difference signal of the video signal by a time equivalent to 1H (horizontal scanning period), and a subtracter that subtracts the output signal of the delay circuit and the color difference signal. a first absolute value circuit that converts the output signal of the subtracter into an absolute value; a differentiation circuit that differentiates the color difference signal; and a second absolute value circuit that converts the output signal of the differentiation circuit into an absolute value;
Utility model registration claim 1, further comprising a selector that selects the one with a larger signal level from among the output signals of the first and second absolute value circuits and uses it as the change information. Y-C separation circuit as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18566186U JPS6390386U (en) | 1986-12-01 | 1986-12-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18566186U JPS6390386U (en) | 1986-12-01 | 1986-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6390386U true JPS6390386U (en) | 1988-06-11 |
Family
ID=31134499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18566186U Pending JPS6390386U (en) | 1986-12-01 | 1986-12-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6390386U (en) |
-
1986
- 1986-12-01 JP JP18566186U patent/JPS6390386U/ja active Pending
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