JP4295131B2 - カムコーダによる不正行為を阻止する高められた安全性を有するプロジェクタ - Google Patents
カムコーダによる不正行為を阻止する高められた安全性を有するプロジェクタ Download PDFInfo
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- JP4295131B2 JP4295131B2 JP2004049686A JP2004049686A JP4295131B2 JP 4295131 B2 JP4295131 B2 JP 4295131B2 JP 2004049686 A JP2004049686 A JP 2004049686A JP 2004049686 A JP2004049686 A JP 2004049686A JP 4295131 B2 JP4295131 B2 JP 4295131B2
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- Prior art keywords
- image
- color
- projector
- light
- projection
- 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.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91314—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a pulse signal inserted in blanking intervals of the video signal, e.g. pseudo-AGC pulses, pseudo-sync pulses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91342—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being an authentication signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
- H04N2005/91371—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video color burst signal being modified
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91392—Television signal processing therefor for scrambling ; for copy protection using means for preventing making copies of projected video images
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Projection Apparatus (AREA)
- Liquid Crystal (AREA)
- Television Signal Processing For Recording (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Description
・見られる通りの画像(as viewed image)を劣化しない、
・見られる通りの画像の不正複製を劣化する、
・光学スループットに関して能率的である、
・容易に実施することができる、
・動画データストリームへの変更を必要としない、
動画の画面からの海賊行為を阻止する系が必要である。
実施例1
第1の実施例では、像の光レベルに空間的に大域的で空間的に不変な効果をもたらすデジタル投影系内の位置において時間変調される光を供給する。最も明らかなことには、光は、像リレーレンズ28組立体の絞り(面F)において/絞りの付近において、又は、照明リレーレンズ82組立体の絞り(面D)において/絞りの付近において変調されることが可能である。これらの位置では、像は焦点が合っておらず、これは、与えられる又は取り外される機械的素子の任意の移り変わりは、観察者の目には見えないことを意味する。更に、面D及びFでは、1色のみが変調され、このことは、不正の複製において他の2色が過剰に表示される効果をもたらす。従って、不正の複製は、カメラの捕捉サンプリング周波数と干渉変調手段の変調周波数の相互作用による時間的なストロービング又はフリッカ効果の影響を受けるだけでなく、不正にサンプリングされた画像は、正しくない演色も有する。
実施例2
照明路における一対のリレー集光光学素子80、82か、又か、結像経路における像リレー光学素子28を有するデジタル投影系10は、中間像面とインタラクトする可能性を独自に与える。図1において、均一化光学素子22の終わりにおける面A、色分割素子の後の面C、空間光変調器面E、及び、1色の内部像である面Gは、全て焦点の合ったの内部像である。多くの他のフィルム又はデジタル投影系において、中間像へのアクセスを与える面は、照明及び結像光路にはない。何故なら、それらが存在しないか、又は、より一般的には、これらの面に、空間光変調器又は他の結像素子が設置されるからである。
実施例3
像は、開口絞りでも、像面でもない(そして、任意の内部中間像面の焦点の奥行きに意図的に十分に外れた)ビーム場所に置かれる変調干渉手段を用いて変更されることが可能である。このような場所の例は、図1の面K1及びK2である。この場合、干渉変調装置は、像面の大きい領域をアドレス指定する光錐に連続的に変化をもたらすことができる。特に、干渉変調装置は、像の所与の領域をアドレス指定する第1の光錐に変化をもたらし、次に、干渉変調装置は、像面の異なる大きい領域をアドレス指定する第2の光錐に変化をもたらし得る。光錐は、(好適なデジタル投影系の大きい視野及び開口数を仮定すると)中間像面から数インチ離れたビーム収束空間内であることが可能である。このことは、像面は、像に空間的及び時間的の両方で変化がもたらされるよう変更可能であるが、対象物が実際に像面に焦点が合わされる感性/困難がないことを意味する。その場合、干渉変調手段は、複数のメカニズム、又は、動かされる1つのメカニズム、又は、独立して作動可能な画成された活性領域を有する1つのメカニズムを含み得る。光学系において、ビームが分岐する場所と、例えば、面K1及びK2といったようにちょうど一点に収束した場所ではないビーム場所に変調干渉素子手段を置くことによって、同じ結果を達成することができる。
2 内部像コピープロテクトモジュール
10 投影装置
11 コピープロテクト照明系
12 コピープロテクト結像系
20 光源
22 均一化光学素子
24 偏光ビームスプリッタ
26 ダイクロイック合成器
27 ダイクロイック分離器
28 像リレーレンズ
30 光変調器
31 反射鏡
32 投影レンズ
36 ダイクロイック面
38 光変調組立体
40 表示面
70 ランプハウス
71 電源
72 ランプ点火装置
73 排気スタック
75 投影ユニット
80 テレセントリックベースコンデンサリレー
82 照明リレーレンズ
Claims (5)
- 空間光変調器を照明するコピープロテクト照明系を含む、カムコーダによる不正行為を阻止する高められた安全性を有するプロジェクタであって、
(a)多色光源と、
(b)均一な照明視野を供給するよう前記多色光源からの光を均一化する均一化光学素子と、
(c)リレー光学素子と、
(d)ダイクロイック光学素子と、
(e)前記多色光源と前記空間光変調器との間にある光路における面に設置される干渉変調素子と、
(f)前記干渉変調素子の欠如を判断すべく、前記干渉変調素子内に一体的に組み込まれる電子IDタグを検出する検出手段と、
を含むプロジェクタ。 - 前記干渉変調素子の欠如が、応答をトリガする請求項1記載のカムコーダによる不正行為を阻止する高められた安全性を有するプロジェクタ。
- 前記応答は、前記プロジェクタの動作を阻止する請求項2記載のカムコーダによる不正行為を阻止する高められた安全性を有するプロジェクタ。
- 前記応答は、可聴の又は可視のアラームである請求項2記載のカムコーダによる不正行為を阻止する高められた安全性を有するプロジェクタ。
- 前記応答は、第三者への信号である請求項2記載のカムコーダによる不正行為を阻止する高められた安全性を有するプロジェクタ。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/401,208 US7221759B2 (en) | 2003-03-27 | 2003-03-27 | Projector with enhanced security camcorder defeat |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004295098A JP2004295098A (ja) | 2004-10-21 |
JP4295131B2 true JP4295131B2 (ja) | 2009-07-15 |
Family
ID=32825007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004049686A Expired - Fee Related JP4295131B2 (ja) | 2003-03-27 | 2004-02-25 | カムコーダによる不正行為を阻止する高められた安全性を有するプロジェクタ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7221759B2 (ja) |
EP (1) | EP1463310B1 (ja) |
JP (1) | JP4295131B2 (ja) |
CN (1) | CN100426128C (ja) |
CA (1) | CA2457272C (ja) |
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US7693330B2 (en) * | 2004-03-15 | 2010-04-06 | Vincent So | Anti-piracy image display methods and systems with sub-frame intensity compensation |
-
2003
- 2003-03-27 US US10/401,208 patent/US7221759B2/en not_active Expired - Fee Related
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2004
- 2004-02-11 CA CA002457272A patent/CA2457272C/en not_active Expired - Fee Related
- 2004-02-25 JP JP2004049686A patent/JP4295131B2/ja not_active Expired - Fee Related
- 2004-03-15 EP EP04075816A patent/EP1463310B1/en not_active Expired - Fee Related
- 2004-03-26 CN CNB2004100312724A patent/CN100426128C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JP2004295098A (ja) | 2004-10-21 |
EP1463310A1 (en) | 2004-09-29 |
CA2457272A1 (en) | 2004-09-27 |
EP1463310A8 (en) | 2005-06-15 |
US7221759B2 (en) | 2007-05-22 |
US20040190716A1 (en) | 2004-09-30 |
CA2457272C (en) | 2007-09-18 |
CN100426128C (zh) | 2008-10-15 |
EP1463310B1 (en) | 2012-04-18 |
CN1542539A (zh) | 2004-11-03 |
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