JPH0475485U - - Google Patents
Info
- Publication number
- JPH0475485U JPH0475485U JP1990117665U JP11766590U JPH0475485U JP H0475485 U JPH0475485 U JP H0475485U JP 1990117665 U JP1990117665 U JP 1990117665U JP 11766590 U JP11766590 U JP 11766590U JP H0475485 U JPH0475485 U JP H0475485U
- Authority
- JP
- Japan
- Prior art keywords
- key signal
- video
- involved
- signal
- synchronized
- 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
- 230000001360 synchronised effect Effects 0.000 claims 3
- 230000008054 signal transmission Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
Description
第１図は本考案による送信系スクランブル装置
の構成を示すブロツク図、第２図は偽鍵信号発生
装置の構成を示すブロツク図、第３図は鍵信号の
タイミングチヤート、第４図は従来の送信系スク
ランブル装置の構成を示すブロツク図である。
１……入力端子、２……映像スクランブル装置
、３……鍵信号発生装置、４……論理和回路、５
……サブキヤリア変調装置、６……合成器、７…
…出力端子、８……偽鍵信号発生装置、９……同
期分離器、１０……水平同期再生器、１１……垂
直同期再生器、１２……遅延器、１３……間欠制
御器。
Figure 1 is a block diagram showing the configuration of a transmission system scrambler according to the present invention, Figure 2 is a block diagram showing the configuration of a false key signal generator, Figure 3 is a key signal timing chart, and Figure 4 is a conventional one. FIG. 2 is a block diagram showing the configuration of a transmission scrambling device. 1... Input terminal, 2... Video scramble device, 3... Key signal generator, 4... OR circuit, 5
...Subcarrier modulator, 6...Synthesizer, 7...
. . . Output terminal, 8 . . . False key signal generator, 9 .
Claims (1)
ランブル方式において、活性映像信号伝送期間中
に鍵信号の同期再生に関与しない偽鍵信号を挿入
し、同期再生に関与する鍵信号と合成し、伝送す
る映像スクランブル鍵信号伝送方式。 In a scrambling method that transmits a key signal synchronized with a video synchronization signal, a false key signal that is not involved in the synchronized playback of the key signal is inserted during the active video signal transmission period, and is combined with the key signal that is involved in the synchronized playback before being transmitted. Video scramble key signal transmission method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990117665U JPH0475485U (en) | 1990-11-13 | 1990-11-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990117665U JPH0475485U (en) | 1990-11-13 | 1990-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0475485U true JPH0475485U (en) | 1992-07-01 |
Family
ID=31865566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990117665U Pending JPH0475485U (en) | 1990-11-13 | 1990-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0475485U (en) |
-
1990
- 1990-11-13 JP JP1990117665U patent/JPH0475485U/ja active Pending
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