JP2000503821A - 複数の衛星からのテレビジョン信号の暗号解読システム - Google Patents
複数の衛星からのテレビジョン信号の暗号解読システムInfo
- Publication number
- JP2000503821A JP2000503821A JP9518947A JP51894797A JP2000503821A JP 2000503821 A JP2000503821 A JP 2000503821A JP 9518947 A JP9518947 A JP 9518947A JP 51894797 A JP51894797 A JP 51894797A JP 2000503821 A JP2000503821 A JP 2000503821A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- signals
- television
- decryption
- receiving
- 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
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
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Radio Relay Systems (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 複数の異なる衛星〜送信される信号を受信しかつ暗号解読するための家庭 用衛星テレビジョン受信システムにおいて、 各々異なる暗号化形式を有する第1及び第2の衛星からそれぞれの暗号化形式 により暗号化された第1の暗号化テレビジョン信号及び第2の暗号化テレビジョ ン信号を同時に受信するアンテナ・システムと、 ユーザーすなわち視聴者が視聴するために前記第1の暗号化テレビジョン信号 及び前記第2の暗号化テレビジョン信号のうち1つを選択できるスイッチと、 取り外し可能な第1及び第2のスマート・カードを同時に格納し、前記第1の スマート・カードは、前記受信された第1の暗号化テレビジョン信号を暗号解読 するための第1の暗号解読アルゴリズムを記憶するメモリを含み、前記第2のス マート・カードは、前記受信された第2の暗号化テレビジョン信号を暗号解読す るための第2の暗号解読アルゴリズムを記憶するメモリを含むことにより、前記 ユーザーすなわち視聴者が視聴するために選択した信号が第1又は第2の暗号化 テレビジョン信号のいずれであっても適切なスマート・カードを用いて暗号解読 した後に視聴するために送出する暗号解読装置とを有する 家庭用衛星テレビジョン受信システム。 2. 前記アンテナ・システムからの前記第1及び第2の暗号化テレビジョン信 号を受信して、前記選択された信号を前記暗号解読装置へ出力する入力信号イン タフェースを有し、前記入力信号インタフェースが前記スイッチを含む 請求項1のシステム。 3. 前記入力信号インタフェースと前記暗号解読装置の間に配置されるRF同 調し、復調し、かつフォワード・エラー修正(FEC)を行う手段を有し、前記 RF同調し、復調し、かつフォワード・エラー修正を行う手段が、前記選択され た信号をデジタル・データ・ストリームの形で前記暗号解読装置へ送出する 請求項2のシステム。 4. 暗号解読された前記選択されたテレビジョン信号を解凍した後、解凍され た該テレビジョン信号を視聴するために画像出力装置へと送出する手段を有し、 かつ、前記第1及び第2のスマート・カードがそれぞれ第1及び第2の暗号解読 キーを記憶する 請求項3のシステム。 5. 前記入力信号インタフェース、前記暗号解読装置、前記RF同調し復調し かつFECを行う手段、及び、前記解凍する手段と通信するコントローラを有し 、前記コントローラが前記スイッチを操作することにより前記ユーザーが視聴す るための信号及び衛星を選択できる 請求項4のシステム。 6. 前記第1及び第2の暗号化テレビジョン信号が直接放送衛星(DBS)信号 である 請求項1のシステム。 7. 前記暗号解読装置内に取り外し可能に受容できかつ第3の暗号解読アルゴ リズムを含む第3のスマート・カードを有することにより、前記アンテナ・シス テムが同時に3つの異なる暗号化テレビジョン信号を受信したとき、前記ユーザ ーすなわち視聴者が、暗号解読及び視聴のために前記3つの暗号化テレビジョン 信号のうちのいずれも選択できる 請求項1のシステム。 8. 前記アンテナ・システムがマルチビームアレイ・アンテナを含み、該マル チビームアレイ・アンテナは、実質的に同じ周波数である前記第1及び第2のテ レビジョン信号を同時に受信しかつ送出し、前記第1のテレビジョン信号は右回 り偏波され、前記第2のテレビジョン信号は左回り偏波されている 請求項1のシステム。 9. 前記アンテナ・システムが前記第1及び第2のテレビジョン信号をそれぞ れ受信する第1及び第2のパラボラ・アンテナすなわちディッシュを有する 請求項1のシステム。 10. 複数の衛星信号を受信しかつ前記複数の衛星信号のうち1つを選択する 方法において、 異なる暗号化形式による第1及び第2の暗号化信号をそれぞれ第1及び第2の 衛星から同時に受信するステップと、 第1及び第2の信号のいずれかを選択するステップと、 前記選択された衛星信号を暗号解読するために、前記第1及び第2の信号にそ れぞれ対応する第1及び第2の異なる暗号解読アルゴリズムをそれぞれ含む第1 及び第2の取り外し可能で同時にアクセス可能な暗号解読カードのうち1つを選 択するステップと、 前記選択された信号を前記選択された暗号解読カードを用いて暗号解読しかつ 逆スクランブリングするステップと、 前記暗号解読されかつ逆スクランブリングされた信号を使用するステップとを 有する方法。 11. セット・トップ・ボックスと組み合わされるアレイ・アンテナ受信シス テムを含むテレビジョン受信システムにおいて、 各サブアレイが複数の右回り円偏波用アンテナ要素を有する右回り円偏波用の サブアレイからなる第1のサブアレイの群、及び、各サブアレイが複数の左回り 円偏波用アンテナ要素を有する左回り円偏波用のサブアレイからなる第2のサブ アレイの群を有し、 前記第1及び第2のサブアレイの群は、各サブアレイが交互になるように配列 され、かつ、実質的に同じ周波数を受信可能であり、 前記第1のサブアレイの群から信号を受信する第1の電磁気的レンズ、及び、 前記第2のサブアレイの群から信号を受信する第2の電磁気的レンズと、 前記システムが、該システムの走査フィールド内の右回り円偏波信号、左回り 円偏波信号、及び直線偏波信号を受信可能であるように前記第1及び第2の電磁 気的レンズを操作する手段と、 前記サブアレイ及び前記レンズと通信し、かつ前記レンズのうち少なくとも1 つから受信された信号を暗号解読する第1の暗号解読アルゴリズムを記憶する手 段、及び視聴者がテレビ受像器等により前記信号を視聴できるように前記受信さ れた信号を暗号解読する手段を含む暗号解読装置とを有する テレビジョン受信システム。 12. 異なる偏波の信号を受信するために暗号解読装置と組み合わされるマル チビームアレイ・アンテナ・システムを有するテレビジョン受信システムにおい て、 実質的に同じ周波数の直線偏波信号及び円偏波信号の双方を受信する手段と、 (i)右回り円偏波信号、(ii)左回り円偏波信号、及び(iii)直線偏波信号のうち 少なくとも1つを受信する手段と、 暗号解読用データを記憶する手段、及び前記マルチビームアレイ・アンテナ・ システムから受信された信号を暗号解読することにより視聴者がテレビ受像器等 により該暗号解読された信号を視聴できるようにする手段を含む暗号解読装置と を有する テレビジョン受信システム。 13. 円偏波及び直線偏波の複数の偏波をもつ実質的に同じ周波数の複数のビ ームを同時に受信する手段と、前記視聴者が複数の異なる衛星からの異なる偏波 の信号を同時に利用できるように該複数の異なる衛星に同時にアクセスする手段 とを有する請求項12のシステム。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/556,511 US5742680A (en) | 1995-11-13 | 1995-11-13 | Set top box for receiving and decryption and descrambling a plurality of satellite television signals |
| US08/556,511 | 1995-11-13 | ||
| PCT/US1996/017936 WO1997018656A1 (en) | 1995-11-13 | 1996-11-13 | System for decrypting television from several satellites |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000503821A true JP2000503821A (ja) | 2000-03-28 |
Family
ID=24221649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9518947A Pending JP2000503821A (ja) | 1995-11-13 | 1996-11-13 | 複数の衛星からのテレビジョン信号の暗号解読システム |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5742680A (ja) |
| EP (1) | EP0861542A4 (ja) |
| JP (1) | JP2000503821A (ja) |
| AU (1) | AU725163B2 (ja) |
| NZ (1) | NZ325532A (ja) |
| WO (1) | WO1997018656A1 (ja) |
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-
1995
- 1995-11-13 US US08/556,511 patent/US5742680A/en not_active Expired - Fee Related
-
1996
- 1996-11-13 WO PCT/US1996/017936 patent/WO1997018656A1/en not_active Ceased
- 1996-11-13 JP JP9518947A patent/JP2000503821A/ja active Pending
- 1996-11-13 AU AU14059/97A patent/AU725163B2/en not_active Ceased
- 1996-11-13 EP EP96944189A patent/EP0861542A4/en not_active Withdrawn
- 1996-11-13 NZ NZ325532A patent/NZ325532A/en unknown
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| NZ325532A (en) | 1998-11-25 |
| AU1405997A (en) | 1997-06-05 |
| AU725163B2 (en) | 2000-10-05 |
| WO1997018656A1 (en) | 1997-05-22 |
| US5742680A (en) | 1998-04-21 |
| EP0861542A4 (en) | 2001-01-03 |
| EP0861542A1 (en) | 1998-09-02 |
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