JPS5969572U - Teletext reception indicator circuit - Google Patents
Teletext reception indicator circuitInfo
- Publication number
- JPS5969572U JPS5969572U JP16321082U JP16321082U JPS5969572U JP S5969572 U JPS5969572 U JP S5969572U JP 16321082 U JP16321082 U JP 16321082U JP 16321082 U JP16321082 U JP 16321082U JP S5969572 U JPS5969572 U JP S5969572U
- Authority
- JP
- Japan
- Prior art keywords
- holding
- signal
- indicator circuit
- output
- gate
- 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図は文字多重放送における画像情報の一例を示す概
略構成図、第2図は本考案に係る文字多重放送の受信イ
ンジケータ回路の回路図、第3図は第2図の回路動作を
説明するためのタイミング・チャート、第4図は第2図
の垂直同期周期の回動動作を説明するためのタイミング
・チャートである。
FC・・・フレーミング・コード、S■・・・サービス
識別コード、Ql・・・シフト・レジスタ、Q2・・・
フレーミング・コード及びサービス識別コード検出用デ
コーダ、Q3. Q9・・・D形フリップ・フロップ、
Q’bQ4・・・シフト・レジスタ、Q7・・・3人カ
アンド・ゲート、Trl、 Tr2・・・トランジスタ
、R□〜R2・・・抵抗、C1・・・コンデンサ、D、
・・・発売ダイオード、VDD’・・直流電圧源、1・
・・スライス・データ入力端子、2・・・サンプル・ク
ロック信号入力端子、3・・・重畳Hゲート入力端子、
4・・・H−RESET入力端子、5・・・v、RES
ET入力端子。
5
’J −−Van
Q6 ■
羽。
4 j
一
−Cに
ヨ μV
DD
■−
−Qa −“Fig. 1 is a schematic configuration diagram showing an example of image information in teletext broadcasting, Fig. 2 is a circuit diagram of a reception indicator circuit for teletext broadcasting according to the present invention, and Fig. 3 explains the circuit operation of Fig. 2. FIG. 4 is a timing chart for explaining the rotation operation of the vertical synchronization period in FIG. 2. FC...Framing code, S■...Service identification code, Ql...Shift register, Q2...
Framing code and service identification code detection decoder, Q3. Q9...D type flip-flop,
Q'bQ4...Shift register, Q7...3-person gate, Trl, Tr2...Transistor, R□~R2...Resistor, C1...Capacitor, D,
...Sale diode, VDD'...DC voltage source, 1.
... slice data input terminal, 2 ... sample clock signal input terminal, 3 ... superimposition H gate input terminal,
4...H-RESET input terminal, 5...v, RES
ET input terminal. 5'J --Van Q6 ■ Feathers. 4 j 1-C to μV DD ■- -Qa -“
Claims (1)
ド及びサービス識別コードを検知するデコード手段と、
このデコード手段のフレーミング・コード検出出力の出
力状態を保持しこの保持信号を予め設定された期間まで
シフトさせるシフト手段と、シフトされた保持信号を用
いて前記デコード手段のサービス識別コード検出出力を
ゲートするゲート手段と、このゲート手段の出力状態を
保持する信号保持手段と、この信号保持手段の出力にて
駆動される表示ドライブ手段及び表示手段とを具備する
ことを特徴とする文字多重放送の受信インジケータ回路
。decoding means for detecting a framing code and a service identification code in a control signal of a teletext signal;
a shift means for holding the output state of the framing code detection output of the decoding means and shifting this holding signal to a preset period; and a shifting means for gating the service identification code detection output of the decoding means using the shifted holding signal. Receiving teletext broadcasting characterized by comprising: a gate means for holding an output state of the gate means; a signal holding means for holding the output state of the gate means; and a display drive means and a display means driven by the output of the signal holding means. indicator circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16321082U JPS5969572U (en) | 1982-10-29 | 1982-10-29 | Teletext reception indicator circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16321082U JPS5969572U (en) | 1982-10-29 | 1982-10-29 | Teletext reception indicator circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5969572U true JPS5969572U (en) | 1984-05-11 |
Family
ID=30358183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16321082U Pending JPS5969572U (en) | 1982-10-29 | 1982-10-29 | Teletext reception indicator circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5969572U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0759008A (en) * | 1993-01-29 | 1995-03-03 | Thomson Consumer Electron Inc | Television apparatus |
-
1982
- 1982-10-29 JP JP16321082U patent/JPS5969572U/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0759008A (en) * | 1993-01-29 | 1995-03-03 | Thomson Consumer Electron Inc | Television apparatus |
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