JP4284185B2 - ビデオ・システムおよびビデオ・システムにおけるコピー防止方式を非同期的に検出する方法 - Google Patents
ビデオ・システムおよびビデオ・システムにおけるコピー防止方式を非同期的に検出する方法 Download PDFInfo
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- JP4284185B2 JP4284185B2 JP2003553827A JP2003553827A JP4284185B2 JP 4284185 B2 JP4284185 B2 JP 4284185B2 JP 2003553827 A JP2003553827 A JP 2003553827A JP 2003553827 A JP2003553827 A JP 2003553827A JP 4284185 B2 JP4284185 B2 JP 4284185B2
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- 238000001514 detection method Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 12
- 239000002131 composite material Substances 0.000 claims description 23
- 230000002265 prevention Effects 0.000 description 13
- 238000012545 processing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
- G11B20/00615—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the logical format of the recording medium, e.g. the structure of sectors, blocks, or frames
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
-
- 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
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
-
- 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
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Security & Cryptography (AREA)
- Television Signal Processing For Recording (AREA)
- Television Systems (AREA)
Description
本発明によれば、ビデオ・システムは、検出回路およびタイミング回路を備えている。検出回路は、少なくとも1つのタイミング信号に応答して複合同期信号中の擬似同期パルスを検出するように動作する。タイミング回路は、複合同期信号中の同期情報を利用せずに、少なくとも1つのタイミング信号を生成するように動作する。
特許請求の範囲と実施例との対応関係を実施例で使われている参照符号を用いて示すと以下の通りである。
(請求項1)
少なくとも1つのタイミング信号に応答して、複合同期信号中の擬似同期パルスを検出するように動作する検出回路であって、前記少なくとも1つのタイミング信号によって示される時間内に前記擬似同期パルスを表す少なくとも1つの所定のビット・パターンを検出するように動作するフィルタを含む検出回路(200A〜200C)と、
クロック信号を生成するように動作するクロック回路と、
前記クロック信号に応じて前記少なくとも1つのタイミング信号を生成するように動作するタイミング回路(200D〜200F)とを備えるビデオ・システム(100)であって、
前記少なくとも1つのタイミング信号が、前記複合同期信号中の同期情報とは独立して生成される、ビデオ・システム。
(請求項2)
前記検出回路(200A〜200C)が、前記時間内にビデオ・フィールドの複数の連続した各ライン中の少なくとも2つの擬似同期パルスを検出するように動作する、請求項1に記載のビデオ・システム(100)。
(請求項3)
ビデオ・システムにおけるコピー防止方式を非同期的に検出する方法であって、
少なくとも1つのタイミング信号によって示される時間内に複合同期信号中の擬似同期パルスを表す少なくとも1つの所定のビット・パターンを検出するステップと、
クロック信号に応じて、前記複合同期信号とは独立した前記少なくとも1つのタイミング信号を生成するステップとを含む、前記方法。
(請求項4)
前記検出ステップが、前記時間内にビデオ・フィールドの複数の連続した各ライン中の少なくとも2つの擬似同期パルスを検出することを含む、請求項3に記載の方法。
Claims (4)
- 少なくとも1つのタイミング信号に応答して、複合同期信号中の擬似同期パルスを検出するように動作する検出回路であって、前記少なくとも1つのタイミング信号によって示される時間内に前記擬似同期パルスを表す少なくとも1つの所定のビット・パターンを検出するように動作するフィルタを含む検出回路と、
クロック信号を生成するように動作するクロック回路と、
前記クロック信号に応じて前記少なくとも1つのタイミング信号を生成するように動作するタイミング回路とを備えるビデオ・システムであって、
前記少なくとも1つのタイミング信号が、前記複合同期信号中の同期情報とは独立して生成される、前記ビデオ・システム。 - 前記検出回路が、前記時間内にビデオ・フィールドの複数の連続した各ライン中の少なくとも2つの擬似同期パルスを検出するように動作する、請求項1に記載のビデオ・システム。
- ビデオ・システムにおけるコピー防止方式を非同期的に検出する方法であって、
少なくとも1つのタイミング信号によって示される時間内に複合同期信号中の擬似同期パルスを表す少なくとも1つの所定のビット・パターンを検出するステップと、
クロック信号に応じて、前記複合同期信号とは独立した前記少なくとも1つのタイミング信号を生成するステップとを含む、前記方法。 - 前記検出ステップが、前記時間内にビデオ・フィールドの複数の連続した各ライン中の少なくとも2つの擬似同期パルスを検出することを含む、請求項3に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US34055501P | 2001-12-14 | 2001-12-14 | |
US10/170,955 US7599604B2 (en) | 2001-12-14 | 2002-06-13 | Asynchronous copy protection detector |
PCT/US2002/039123 WO2003053054A1 (en) | 2001-12-14 | 2002-12-09 | Asynchronous copy protection detector |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005513880A JP2005513880A (ja) | 2005-05-12 |
JP2005513880A5 JP2005513880A5 (ja) | 2006-01-26 |
JP4284185B2 true JP4284185B2 (ja) | 2009-06-24 |
Family
ID=26866588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003553827A Expired - Lifetime JP4284185B2 (ja) | 2001-12-14 | 2002-12-09 | ビデオ・システムおよびビデオ・システムにおけるコピー防止方式を非同期的に検出する方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7599604B2 (ja) |
EP (1) | EP1486064A4 (ja) |
JP (1) | JP4284185B2 (ja) |
KR (1) | KR100954971B1 (ja) |
CN (2) | CN101442642B (ja) |
AU (1) | AU2002363977A1 (ja) |
MX (1) | MXPA04005738A (ja) |
WO (1) | WO2003053054A1 (ja) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5194965A (en) * | 1983-11-23 | 1993-03-16 | Macrovision Corporation | Method and apparatus for disabling anti-copy protection system in video signals |
DE3855568T2 (de) | 1987-07-29 | 1997-02-06 | Scitec Corp | Methode für den Kopierschutz eines vorbespielten Videobandes |
JPH0549001A (ja) * | 1991-08-21 | 1993-02-26 | Sony Corp | ビデオ信号記録装置 |
JPH0644755A (ja) * | 1992-07-24 | 1994-02-18 | Sony Corp | ビデオ信号の伝送方法及び記録装置 |
JPH06350592A (ja) | 1993-06-08 | 1994-12-22 | Matsushita Electric Ind Co Ltd | 符号化信号復号化装置 |
US5442405A (en) * | 1993-12-22 | 1995-08-15 | Matsushita Electric Industrial Co., Ltd. | Frame synchronizing circuit for frame synchronization of digital signals |
JP3501184B2 (ja) | 1994-12-13 | 2004-03-02 | ソニー株式会社 | デジタル信号の再生装置 |
JP3341546B2 (ja) * | 1995-10-05 | 2002-11-05 | ソニー株式会社 | デジタル画像信号の記録再生方法及び記録再生装置 |
ATE477678T1 (de) * | 1995-10-17 | 2010-08-15 | Rovi Solutions Corp | Digitale entfernung von videokopierschutzimpulsen |
KR0164538B1 (ko) | 1995-12-05 | 1999-03-20 | 김광호 | 디지탈 영상처리장치의 의사동기신호 발생회로 |
JP3407556B2 (ja) * | 1996-08-14 | 2003-05-19 | ソニー株式会社 | 映像符号化変換装置 |
JP2000050200A (ja) | 1998-07-28 | 2000-02-18 | Canon Inc | コピー禁止信号検出装置、方法及びコンピュ−タ読み取り可能な記憶媒体 |
US6931547B2 (en) * | 2001-01-03 | 2005-08-16 | Macrovision Corporation | Method and apparatus for identifying a vertical blanking interval in a television signal |
-
2002
- 2002-06-13 US US10/170,955 patent/US7599604B2/en not_active Expired - Fee Related
- 2002-12-09 CN CN2009100023093A patent/CN101442642B/zh not_active Expired - Fee Related
- 2002-12-09 WO PCT/US2002/039123 patent/WO2003053054A1/en active Application Filing
- 2002-12-09 KR KR1020047009202A patent/KR100954971B1/ko active IP Right Grant
- 2002-12-09 JP JP2003553827A patent/JP4284185B2/ja not_active Expired - Lifetime
- 2002-12-09 EP EP02798495A patent/EP1486064A4/en not_active Withdrawn
- 2002-12-09 CN CNA028249186A patent/CN1605195A/zh active Pending
- 2002-12-09 AU AU2002363977A patent/AU2002363977A1/en not_active Abandoned
- 2002-12-09 MX MXPA04005738A patent/MXPA04005738A/es active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
US20030113101A1 (en) | 2003-06-19 |
EP1486064A4 (en) | 2009-12-09 |
AU2002363977A1 (en) | 2003-06-30 |
CN1605195A (zh) | 2005-04-06 |
CN101442642A (zh) | 2009-05-27 |
WO2003053054A1 (en) | 2003-06-26 |
JP2005513880A (ja) | 2005-05-12 |
US7599604B2 (en) | 2009-10-06 |
KR100954971B1 (ko) | 2010-04-29 |
CN101442642B (zh) | 2012-05-30 |
KR20040065272A (ko) | 2004-07-21 |
MXPA04005738A (es) | 2004-12-06 |
EP1486064A1 (en) | 2004-12-15 |
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