JPS59125180U - Time axis error detection circuit - Google Patents
Time axis error detection circuitInfo
- Publication number
- JPS59125180U JPS59125180U JP1779483U JP1779483U JPS59125180U JP S59125180 U JPS59125180 U JP S59125180U JP 1779483 U JP1779483 U JP 1779483U JP 1779483 U JP1779483 U JP 1779483U JP S59125180 U JPS59125180 U JP S59125180U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- time
- phase difference
- detection circuit
- axis error
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、従来の時間軸誤差検出回路の一例を示すブロ
ック図、第２図は、本考案の一実施例を示す回路ブロッ
ク図、第３図は、第２図の回路の一部の作用を示すカラ
ーバースト信号のベクトル図、第４図は、第２図の回路
の各部の動作を示す波形図である。
主要部分の符号の説明、３・・・・・・位相検波器、４
゜９・・・・・・ＬＰＦ、 ５・・・・・・サンプルホ
ールド回路、６・・・・・・パーストゲート、７・・・
・・・ＰＬＬ回路、８・・・・・・移相器、１０・・・
・・・コンパレータ、１１・・・・・・Ｔ形フリップフ
ロップ、１２・！・・・・単安定マルチ、１３・・・・
・・パルス発生回路、１４・・・・・−ＮＡＮＤゲート
。FIG. 1 is a block diagram showing an example of a conventional time axis error detection circuit, FIG. 2 is a circuit block diagram showing an embodiment of the present invention, and FIG. 3 is a part of the circuit shown in FIG. 2. FIG. 4 is a vector diagram of the color burst signal showing the effect, and is a waveform diagram showing the operation of each part of the circuit of FIG. 2. Explanation of symbols of main parts, 3...Phase detector, 4
゜9...LPF, 5...Sample hold circuit, 6...Burst gate, 7...
... PLL circuit, 8 ... Phase shifter, 10 ...
...Comparator, 11...T-type flip-flop, 12.! ...Monostable multi, 13...
...Pulse generation circuit, 14...-NAND gate.
Claims (1)
期間おきに位相反転されたＰＡＬ力テービデオ信号が記
録された記録媒体から得られた該ＰＡＬカラービデオ信
号の時間軸誤差を検出して該時間軸誤差に応じた時間軸
誤差信号を発生する時間軸誤差検出回路であって、前記
カラーバースト信号とほぼ同一の周波数を有しかつ前記
カラーバースト信号の平均位相と所定の位相差を有する
基準信号を発生する基準信号発生手段と、前記基準信号
と前記カラーバースト信号間の位相差を検出して該位相
差に応じた信号を発生する位相差検出手段とを含み、１
水平走査期間おきに前記位相差検出手段の出力を保持し
て前記時間軸誤差信号として出力することを特徴とする
時間軸誤差検出回路。A time axis error of a PAL color video signal obtained from a recording medium on which one of the carrier color signals and a color burst signal is phase-inverted every horizontal scanning period is recorded, and the time axis error of the PAL color video signal is detected. A time-base error detection circuit that generates a time-base error signal according to the axis error, the reference signal having substantially the same frequency as the color burst signal and having a predetermined phase difference from the average phase of the color burst signal. a reference signal generating means for generating a reference signal; and a phase difference detecting means for detecting a phase difference between the reference signal and the color burst signal and generating a signal according to the phase difference;
A time-base error detection circuit characterized in that the output of the phase difference detection means is held every horizontal scanning period and outputted as the time-base error signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1779483U JPS59125180U (en) | 1983-02-09 | 1983-02-09 | Time axis error detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1779483U JPS59125180U (en) | 1983-02-09 | 1983-02-09 | Time axis error detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59125180U true JPS59125180U (en) | 1984-08-23 |
Family
ID=30149019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1779483U Pending JPS59125180U (en) | 1983-02-09 | 1983-02-09 | Time axis error detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59125180U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034893A (en) * | 1973-07-31 | 1975-04-03 | ||
| JPS5436812A (en) * | 1977-08-26 | 1979-03-17 | Yukiko Asai | Method and film for copying |
-
1983
- 1983-02-09 JP JP1779483U patent/JPS59125180U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034893A (en) * | 1973-07-31 | 1975-04-03 | ||
| JPS5436812A (en) * | 1977-08-26 | 1979-03-17 | Yukiko Asai | Method and film for copying |
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