JPS5973882U - Horizontal scanning section detection circuit - Google Patents
Horizontal scanning section detection circuitInfo
- Publication number
- JPS5973882U JPS5973882U JP16974182U JP16974182U JPS5973882U JP S5973882 U JPS5973882 U JP S5973882U JP 16974182 U JP16974182 U JP 16974182U JP 16974182 U JP16974182 U JP 16974182U JP S5973882 U JPS5973882 U JP S5973882U
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- horizontal scanning
- scanning section
- arrival
- frequency division
- 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
Landscapes
- Television Signal Processing For Recording (AREA)
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図は垂直及び水平同期信号とデータ挿入区間との関
係を示す図、第２図は従来のデータ区間水平同期パルス
位置検出回路の図、第３図は本考案の原理を示すブロッ
ク図、第４図は本考案の一実施例の回路図、第５−は第
４図の回路の動作を説明するタイミングチャートである
。
主要部分の符号の説明、６・・・分周器、７・・・カウ
ンタ、８・・・デコーダ。FIG. 1 is a diagram showing the relationship between vertical and horizontal synchronization signals and data insertion intervals, FIG. 2 is a diagram of a conventional data interval horizontal synchronization pulse position detection circuit, and FIG. 3 is a block diagram showing the principle of the present invention. FIG. 4 is a circuit diagram of an embodiment of the present invention, and FIG. 5- is a timing chart illustrating the operation of the circuit of FIG. 4. Explanation of symbols of main parts, 6... Frequency divider, 7... Counter, 8... Decoder.
Claims (1)
ｍ番目（ｍは自然数）のパルスを含んで連続するｎ個（
ｎは自然数）のパルスの到来及び同じく第ｍ＋ｎ番目の
パルスを含んで連続するｎ個のパルスの到来の−）ちい
ずれか一方をＮＴＳＣビデオフォーマット信号方式及び
ＰＡＬ（又はＳＥＣＡＭ）ビデオフォーマット信号方式
に応じて選択的に検出するようにした水平走査区間検出
回路であって、前記水平同期信号パルス列を入力とし前
記所定パルスに応答して活性化されかつ少（ともｎ分周
機能を有しこのｎ分周出力が前記第ｍ番目のパルスの発
生タイミングと同期するよう構成された分周手段と、前
記分周出力を入力とし前記ビデオフォーマット信号方式
に応じて進数制御自在なカウンタとを含み、前記カウン
タの出力によりパルスの到来を検出するようにしたこと
を特徴とする水平走査区間検出回路。Consecutive n pulses (where m is a natural number) including the m-th pulse (m is a natural number) based on a predetermined pulse in the horizontal synchronizing signal pulse train
either the arrival of a pulse (n is a natural number) or the arrival of n successive pulses including the m+nth pulse -) in the NTSC video format signaling system or the PAL (or SECAM) video format signaling system. A horizontal scanning section detecting circuit selectively detects the horizontal scanning period according to the input signal, which receives the horizontal synchronizing signal pulse train, is activated in response to the predetermined pulse, and has a frequency division function of n. a frequency dividing means configured such that the frequency division output is synchronized with the generation timing of the m-th pulse; and a counter that receives the frequency division output and can freely control the base number according to the video format signal system, 1. A horizontal scanning section detection circuit, characterized in that the arrival of a pulse is detected by the output of a counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16974182U JPS5973882U (en) | 1982-11-09 | 1982-11-09 | Horizontal scanning section detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16974182U JPS5973882U (en) | 1982-11-09 | 1982-11-09 | Horizontal scanning section detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5973882U true JPS5973882U (en) | 1984-05-19 |
| JPH0411433Y2 JPH0411433Y2 (en) | 1992-03-23 |
Family
ID=30370749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16974182U Granted JPS5973882U (en) | 1982-11-09 | 1982-11-09 | Horizontal scanning section detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5973882U (en) |
-
1982
- 1982-11-09 JP JP16974182U patent/JPS5973882U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0411433Y2 (en) | 1992-03-23 |
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