JPH0351588U - - Google Patents
Info
- Publication number
- JPH0351588U JPH0351588U JP11092089U JP11092089U JPH0351588U JP H0351588 U JPH0351588 U JP H0351588U JP 11092089 U JP11092089 U JP 11092089U JP 11092089 U JP11092089 U JP 11092089U JP H0351588 U JPH0351588 U JP H0351588U
- Authority
- JP
- Japan
- Prior art keywords
- color
- signal
- color signal
- level
- multiplexed
- 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
- 238000010586 diagram Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案の構成を示すブロツク図、第２
図は従来のランダムクロスカラーノイズ除去回路
の構成を示すブロツク図、第３図は第１図、第２
図のａ〜ｊで示す信号を周波数特性で表わした図
、第４図ｋはＮＴＳＣ信号のスペクトラム、ｌは
従来のランダムクロスカラーノイズ除去回路のく
し形フイルタ部分のスペクトラム、ｍは本考案に
よるくし形フイルタ部分のスペクトラム特性を示
す図である。
１０……レベル検出器、１１，１２……乗算回
路。
Figure 1 is a block diagram showing the configuration of the present invention;
The figure is a block diagram showing the configuration of a conventional random cross color noise removal circuit.
Figure 4 shows the frequency characteristics of the signals a to j in the figure, k is the spectrum of the NTSC signal, l is the spectrum of the comb filter part of the conventional random cross color noise removal circuit, and m is the comb filter according to the present invention. FIG. 3 is a diagram showing the spectrum characteristics of a shaped filter portion. 10... Level detector, 11, 12... Multiplication circuit.
Claims (1)
、輝度信号の高域成分をＹ形くし形フイルタを通
し、色信号が多重化される部分のノイズ成分を除
去しておき、これに搬送色信号を多重するランダ
ムクロスカラーノイズ除去回路において、上記色
信号のレベルを検出するレベル検出器を設け、く
し形フイルタの減衰量を、検出した色信号レベル
に応じて変化させるようにしたことを特徴とする
ランダムクロスカラーノイズ除去回路。 When generating an NTSC color television signal, the high-frequency component of the luminance signal is passed through a Y-shaped comb filter to remove noise components from the part where the color signal is multiplexed, and then a random color signal is multiplexed with the carrier color signal. Random cross color, characterized in that the cross color noise removal circuit is provided with a level detector for detecting the level of the color signal, and the attenuation amount of the comb filter is changed according to the detected color signal level. Noise removal circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11092089U JPH0351588U (en) | 1989-09-25 | 1989-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11092089U JPH0351588U (en) | 1989-09-25 | 1989-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0351588U true JPH0351588U (en) | 1991-05-20 |
Family
ID=31659425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11092089U Pending JPH0351588U (en) | 1989-09-25 | 1989-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0351588U (en) |
-
1989
- 1989-09-25 JP JP11092089U patent/JPH0351588U/ja active Pending
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