JPS625554B2 - - Google Patents
Info
- Publication number
- JPS625554B2 JPS625554B2 JP55147412A JP14741280A JPS625554B2 JP S625554 B2 JPS625554 B2 JP S625554B2 JP 55147412 A JP55147412 A JP 55147412A JP 14741280 A JP14741280 A JP 14741280A JP S625554 B2 JPS625554 B2 JP S625554B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmitting side
- audio
- key
- television
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/171—Systems operating in the amplitude domain of the television signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55147412A JPS5769984A (en) | 1980-10-21 | 1980-10-21 | Scramble system for television signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55147412A JPS5769984A (en) | 1980-10-21 | 1980-10-21 | Scramble system for television signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5769984A JPS5769984A (en) | 1982-04-30 |
| JPS625554B2 true JPS625554B2 (enExample) | 1987-02-05 |
Family
ID=15429709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55147412A Granted JPS5769984A (en) | 1980-10-21 | 1980-10-21 | Scramble system for television signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5769984A (enExample) |
-
1980
- 1980-10-21 JP JP55147412A patent/JPS5769984A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5769984A (en) | 1982-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1338158C (en) | Encryption and decryption (scrambling and unscrambling) of video signals | |
| EP0449633A1 (en) | Pay television | |
| JP2697231B2 (ja) | Catvシステム | |
| JPS60137190A (ja) | Catvシステムにおけるスクランブル・デスクランブル方式 | |
| US5113439A (en) | Catv terminal and video apparatus having a noise eliminating circuit | |
| JPH03272293A (ja) | テレビジョン信号のスクランブル方法および装置 | |
| US4639777A (en) | Apparatus for scrambling and descrambling communication signals | |
| JPS594394A (ja) | テレビ放送におけるデイスクランブル用キ−信号送出方法 | |
| JPS625554B2 (enExample) | ||
| JPS625513B2 (enExample) | ||
| JP2609637B2 (ja) | 同期圧縮スクランブル方式 | |
| US5206908A (en) | Method and apparatus for detecting timing pulses for scrambled television system | |
| JPS625507B2 (enExample) | ||
| JP2721163B2 (ja) | 同期圧縮スクランブル装置 | |
| JP2856270B2 (ja) | テレビジョン信号のスクランブル方式 | |
| JPS623974Y2 (enExample) | ||
| JP3521962B2 (ja) | Catvシステムにおける再送信用ユニット | |
| JPH0143514B2 (enExample) | ||
| JP3036270B2 (ja) | Catvシステムのスクランブル方式 | |
| JPH0525438B2 (enExample) | ||
| JPH02261282A (ja) | 映像信号スクランブル方式 | |
| JPH0683448B2 (ja) | テレビジョン信号のスクランブル信号送受信システム | |
| JPH0151119B2 (enExample) | ||
| JPS6011871B2 (ja) | キユー信号の挿入装置 | |
| JPS5941988A (ja) | テレビジヨン信号のスクランブル方式 |