JPS62152572U - - Google Patents
Info
- Publication number
- JPS62152572U JPS62152572U JP3981586U JP3981586U JPS62152572U JP S62152572 U JPS62152572 U JP S62152572U JP 3981586 U JP3981586 U JP 3981586U JP 3981586 U JP3981586 U JP 3981586U JP S62152572 U JPS62152572 U JP S62152572U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- noise
- circuit
- luminance
- reproduction
- 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 description 4
- 239000000284 extract Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Television Signal Processing For Recording (AREA)
- Picture Signal Circuits (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は入力信号波形図、第３図は同期分離回路
２の出力信号波形図、第４図はゲート回路３の出
力信号波形図、第５図は従来のノイズ軽減回路の
一例を示すブロツク図である。
２……同期分離回路、３……ゲート回路、４…
…増巾回路、５……ノイズ振巾検出回路、７……
可変振巾制限器、８……ノイズ軽減回路、２２…
…高域フイルター、２４，２５……つき合わせ回
路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
Figure 2 is an input signal waveform diagram, Figure 3 is an output signal waveform diagram of the synchronous separation circuit 2, Figure 4 is an output signal waveform diagram of the gate circuit 3, and Figure 5 is a block diagram showing an example of a conventional noise reduction circuit. It is a diagram. 2...Synchronization separation circuit, 3...Gate circuit, 4...
...Width amplification circuit, 5... Noise amplitude detection circuit, 7...
Variable amplitude limiter, 8... Noise reduction circuit, 22...
...High frequency filter, 24, 25... matching circuit.
Claims (1)
の輝度ＦＭ再生信号から同期信号をとり出す同期
分離回路と、 前記同期分離回路の出力からノイズ信号のみを
通過させるゲート回路と、 前記ゲート回路から出力されるノイズ信号のレ
ベルを検出するノイズ振巾検出回路と、 前記輝度ＦＭ再生信号から高周波信号を抽出す
るとともに、該抽出された高周波信号を前記ノイ
ズ振巾検出回路で検出されたノイズレベルに応じ
て振幅制限してノイズ信号をとり出し、且つ前記
輝度ＦＭ再生信号から前記ノイズ信号を減算する
ノイズ軽減回路とを備えたことを特徴とするノイ
ズ軽減処理回路。[Claims for Utility Model Registration] A sync separation circuit for extracting a sync signal from a luminance FM reproduction signal of a luminance signal reproduction system in a video tape recorder; a gate circuit for passing only a noise signal from the output of the sync separation circuit; a noise amplitude detection circuit that detects the level of a noise signal output from the gate circuit; and a noise amplitude detection circuit that extracts a high frequency signal from the luminance FM reproduction signal and detects the extracted high frequency signal with the noise amplitude detection circuit. A noise reduction processing circuit comprising: a noise reduction circuit that extracts a noise signal by limiting the amplitude according to a noise level, and subtracts the noise signal from the luminance FM reproduction signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3981586U JPS62152572U (en) | 1986-03-20 | 1986-03-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3981586U JPS62152572U (en) | 1986-03-20 | 1986-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62152572U true JPS62152572U (en) | 1987-09-28 |
Family
ID=30853340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3981586U Pending JPS62152572U (en) | 1986-03-20 | 1986-03-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62152572U (en) |
-
1986
- 1986-03-20 JP JP3981586U patent/JPS62152572U/ja active Pending
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