JPH0338982U - - Google Patents
Info
- Publication number
- JPH0338982U JPH0338982U JP9787489U JP9787489U JPH0338982U JP H0338982 U JPH0338982 U JP H0338982U JP 9787489 U JP9787489 U JP 9787489U JP 9787489 U JP9787489 U JP 9787489U JP H0338982 U JPH0338982 U JP H0338982U
- Authority
- JP
- Japan
- Prior art keywords
- luminance signal
- signal
- horizontal synchronization
- reproducing
- synchronization signal
- 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 5
- 238000000605 extraction Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Picture Signal Circuits (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Description
第１図は本考案の磁気記録再生装置の再生系の
一実施例を示したブロツク図、第２図は第１図に
示したノイズレベル検出回路の詳細例を示したブ
ロツク図である。
１……磁気ヘツド、３……ＦＭ復調回路、５…
…再生映像信号処理回路、６……水平同期信号検
出回路、７……ノイズレベル検出回路、７１……
高域通過フイルタ、７３……発振器、７４……乗
算器、７５……帯域通過フイルタ、７６……基準
信号発生器、７７……比較器。
FIG. 1 is a block diagram showing an embodiment of the reproducing system of the magnetic recording/reproducing apparatus of the present invention, and FIG. 2 is a block diagram showing a detailed example of the noise level detection circuit shown in FIG. 1. 1... Magnetic head, 3... FM demodulation circuit, 5...
...Playback video signal processing circuit, 6...Horizontal synchronization signal detection circuit, 7...Noise level detection circuit, 71...
High pass filter, 73... oscillator, 74... multiplier, 75... band pass filter, 76... reference signal generator, 77... comparator.
Claims (1)
気記録再生装置において、再生映像信号からベー
スバンドの復調輝度信号を得る輝度信号再生手段
と、この輝度信号再生手段によつて得られた復調
輝度信号から水平同期信号を抽出する水平同期信
号抽出手段と、この水平同期信号抽出手段によつ
て抽出された水平同期信号から特定周波数帯のノ
イズ成分を抽出するノイズ抽出手段と、このノイ
ズ抽出手段によつて抽出されたノイズ成分のレベ
ルに対応した制御信号を発生するノイズレベル検
出手段と、このノイズレベル検出手段から発生さ
れた前記制御信号によつて前記輝度信号再生手段
から出力される復調輝度信号の周波数特性を変化
させる画質調整手段とを具備したことを特徴とす
る磁気記録再生装置。 A magnetic recording and reproducing device for reproducing video signals recorded on a tape includes a luminance signal reproducing means for obtaining a baseband demodulated luminance signal from the reproduced video signal, and a demodulated luminance signal obtained by the luminance signal reproducing means. horizontal synchronization signal extraction means for extracting a horizontal synchronization signal; noise extraction means for extracting a noise component in a specific frequency band from the horizontal synchronization signal extracted by the horizontal synchronization signal extraction means; noise level detection means for generating a control signal corresponding to the level of the extracted noise component; and a frequency of a demodulated luminance signal output from the luminance signal reproduction means based on the control signal generated from the noise level detection means. 1. A magnetic recording and reproducing device comprising: image quality adjusting means for changing characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9787489U JPH0338982U (en) | 1989-08-24 | 1989-08-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9787489U JPH0338982U (en) | 1989-08-24 | 1989-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0338982U true JPH0338982U (en) | 1991-04-15 |
Family
ID=31646999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9787489U Pending JPH0338982U (en) | 1989-08-24 | 1989-08-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0338982U (en) |
-
1989
- 1989-08-24 JP JP9787489U patent/JPH0338982U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0473677B2 (en) | ||
| US4361813A (en) | FM Audio demodulator with dropout noise elimination circuit | |
| JPH0338982U (en) | ||
| JPS5549078A (en) | Recording and reproducing device for video format signal | |
| JPH0654970B2 (en) | Video signal recording / reproducing device | |
| JPS641821Y2 (en) | ||
| JPH028462Y2 (en) | ||
| JPH0627021Y2 (en) | Information recording disk playback device | |
| JP2629848B2 (en) | Playback device | |
| JPS6144300Y2 (en) | ||
| JPH03224378A (en) | Audio signal recording and reproducing device | |
| JPH0739091Y2 (en) | Noise removal circuit | |
| JPS6052495B2 (en) | disc playback device | |
| JPS6047645B2 (en) | Video signal recording device | |
| JPS6171784A (en) | Magnetic recording and reproducing device | |
| JPS63174780U (en) | ||
| JPS6121006U (en) | Dropout compensation device for magnetic recording and reproducing equipment | |
| JPH02119492A (en) | Video recording and reproducing device | |
| JPH0325760A (en) | Device for discriminating recording system of frequency modulated video signal | |
| JPS5658112A (en) | Recording/reproducing system of picture information | |
| JPS59117393A (en) | Video tape recorder with tuner | |
| JPS6141284A (en) | Magnetic recording and reproducing device | |
| JPS6391859U (en) | ||
| JPS6128284A (en) | Video signal recorder | |
| JPS594280A (en) | Magnetic recorder and reproducer |