JPH0425384U - - Google Patents
Info
- Publication number
- JPH0425384U JPH0425384U JP6695190U JP6695190U JPH0425384U JP H0425384 U JPH0425384 U JP H0425384U JP 6695190 U JP6695190 U JP 6695190U JP 6695190 U JP6695190 U JP 6695190U JP H0425384 U JPH0425384 U JP H0425384U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- bpf
- extracts
- signal component
- beat 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.)
- Granted
Links
- 238000005259 measurement Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Television Signal Processing For Recording (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図はこの考案の１つの実施例に係るＬＤプ
レーヤ用のクロストーク測定回路の構成を示すブ
ロツク図、第２図はＣＬＶデイスク再生時の垂直
同期信号付近でのクロストーク妨害の様子を示す
説明図、第３図は第１図のクロストーク測定回路
の動作を示すタイムチヤートである。第４図は従
来のＬＤプレーヤ用のクロストーク測定回路の構
成を示すブロツク図、第５図乃至第７図はＣＡＶ
テストデイスクに記録されたテスト画面と対応す
る映像信号を示す説明図である。
主な符号の説明、１０……ＬＤプレーヤ、２０
Ａ……クロストーク測定回路、３０……抜き取り
回路、４０……ＢＰＦ、４４……レベル検出回路
。
Fig. 1 is a block diagram showing the configuration of a crosstalk measurement circuit for an LD player according to an embodiment of this invention, and Fig. 2 shows crosstalk interference near the vertical synchronization signal during CLV disc playback. The explanatory diagram, FIG. 3, is a time chart showing the operation of the crosstalk measuring circuit shown in FIG. 1. Figure 4 is a block diagram showing the configuration of a conventional crosstalk measurement circuit for LD players, and Figures 5 to 7 are CAV
FIG. 2 is an explanatory diagram showing a test screen recorded on a test disk and a corresponding video signal. Explanation of main symbols, 10...LD player, 20
A... Crosstalk measurement circuit, 30... Sampling circuit, 40... BPF, 44... Level detection circuit.
Claims (1)
去期間内の所定期間を抜き取る抜き取り回路と、 抜き取り回路の出力より所定のビート信号成分
を取り出すＢＰＦと、 ＢＰＦで取り出されたビート信号成分のレベル
を検出するレベル検出回路と、 を含むことを特徴とするＬＤのクロストーク測定
回路。[Scope of Claim for Utility Model Registration] A sampling circuit that extracts a predetermined period within the vertical blanking period from the video signal reproduced from the LD, a BPF that extracts a predetermined beat signal component from the output of the sampling circuit, and a BPF. An LD crosstalk measurement circuit comprising: a level detection circuit that detects the level of an extracted beat signal component;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990066951U JP2566309Y2 (en) | 1990-06-25 | 1990-06-25 | LD crosstalk measurement circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990066951U JP2566309Y2 (en) | 1990-06-25 | 1990-06-25 | LD crosstalk measurement circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0425384U true JPH0425384U (en) | 1992-02-28 |
| JP2566309Y2 JP2566309Y2 (en) | 1998-03-25 |
Family
ID=31600101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990066951U Expired - Fee Related JP2566309Y2 (en) | 1990-06-25 | 1990-06-25 | LD crosstalk measurement circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2566309Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57186233A (en) * | 1981-05-09 | 1982-11-16 | Pioneer Video Corp | Crosstalk detector in recording information reproducer |
-
1990
- 1990-06-25 JP JP1990066951U patent/JP2566309Y2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57186233A (en) * | 1981-05-09 | 1982-11-16 | Pioneer Video Corp | Crosstalk detector in recording information reproducer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2566309Y2 (en) | 1998-03-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |