JPS6271976U - - Google Patents
Info
- Publication number
- JPS6271976U JPS6271976U JP16341085U JP16341085U JPS6271976U JP S6271976 U JPS6271976 U JP S6271976U JP 16341085 U JP16341085 U JP 16341085U JP 16341085 U JP16341085 U JP 16341085U JP S6271976 U JPS6271976 U JP S6271976U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- text
- detected
- teletext receiver
- determination
- 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
- 238000009432 framing Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Television Systems (AREA)
Description
第１図は本考案に係る文字放送受信機の一実施
例のブロツク構成図、第２図〜第４図は同一実施
例の動作説明のためのタイミングチヤートである
。
１……アンテナ、２……チユーナ、３……映像
検波回路、４……映像信号処理回路、５……ＡＦ
Ｔ回路、６……文字信号検出回路、７……サンプ
リングクロツク発生回路、８……文字信号処理回
路、９……ＲＧＢ出力切換回路、１０……ＣＲＴ
、１１……フレーミングコード検出回路、１２…
…サンプル＆ホールド回路、１３……切換回路、
１４……選局電圧発生回路、１５，１６……文字
信号、１７，１９……フレーミングコード検出信
号、１８，２０……サンプリング信号、２１，２
２，２３……受信状態判別信号。
FIG. 1 is a block diagram of an embodiment of a teletext receiver according to the present invention, and FIGS. 2 to 4 are timing charts for explaining the operation of the same embodiment. 1...Antenna, 2...Tuner, 3...Video detection circuit, 4...Video signal processing circuit, 5...AF
T circuit, 6...Character signal detection circuit, 7...Sampling clock generation circuit, 8...Character signal processing circuit, 9...RGB output switching circuit, 10...CRT
, 11... framing code detection circuit, 12...
...sample & hold circuit, 13...switching circuit,
14... Tuning voltage generation circuit, 15, 16... Character signal, 17, 19... Framing code detection signal, 18, 20... Sampling signal, 21, 2
2, 23... Reception status determination signal.
Claims (1)
字や図形などの情報が重畳されて送られて来る文
字信号を受信し表示する文字放送受信機において
、文字信号データに先立つて伝送されて来るフレ
ーミングコードを検出する手段と、この検出手段
により検出した信号をもとに最適受信状態を判別
する手段と、この判別手段の判別信号により受信
周波数を自動的に微調し得る手段とを具備したこ
とを特徴とする文字放送受信機。 In a teletext receiver that receives and displays text signals with information such as text and graphics superimposed on them during the vertical blanking period of a television signal, the framing code that is transmitted prior to the text signal data is detected. The present invention is characterized by comprising means for determining the optimum reception condition based on the signal detected by the detection means, and means for automatically finely adjusting the reception frequency based on the determination signal of the determination means. Teletext receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16341085U JPS6271976U (en) | 1985-10-23 | 1985-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16341085U JPS6271976U (en) | 1985-10-23 | 1985-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6271976U true JPS6271976U (en) | 1987-05-08 |
Family
ID=31091581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16341085U Pending JPS6271976U (en) | 1985-10-23 | 1985-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6271976U (en) |
-
1985
- 1985-10-23 JP JP16341085U patent/JPS6271976U/ja active Pending
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