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公开(公告)号：DE69419739D1
公开(公告)日：1999-09-02
申请号：DE69419739
申请日：1994-03-04
Applicant: MACROVISION CORP
Inventor： RYAN JOHN
IPC: G06F1/00 , H04N5/91 , G11B5/86 , G11B20/00 , G11B20/10 , G11B20/12 , H04N5/913 , H04N5/92 , H04N5/94
Abstract: A hybrid digital/analog video recorder prevents both analog and digital copying. The recorder (including a digital tape deck) inputs and outputs both analog and digital video signals. At the analog input, a detector detects conventional copy protection in the analog input video, and in response disables recording thereof. At the digital input, a first detector detects anti-copy bits present in the input material and in response prevents recording. A second bit detector detects serial copy prevention scheme bits, and in response adds an anti-copy bit to the input digital stream, preventing later copying of such material. When another bit detector detects anti-copy bits present in the playback digital data stream prior to conversion to analog, an analog copy protection signal modifies the output analog signal, inhibiting copying of the output signal. In another version, a specially adapted video recorder or playback device copy protects video source material which for technical reasons is not copy protectable. A copy protect "flag" is provided in a predetermined location in the video signal to be protected. The video recorder or playback device,, upon detection of the flag at playback, modifies the output standard (NTSC) video signal with a conventional copy protection process.
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公开(公告)号：DE69505680T2
公开(公告)日：1999-03-25
申请号：DE69505680
申请日：1995-07-27
Applicant: MACROVISION CORP
Inventor： RYAN JOHN
Abstract: A video scrambling and descrambling system that produces color video that is difficult or annoying to watch by randomly switching the color components of a component or composite video. In the scrambling portion, component or composite video is decoded into a luminance component and its two color components. A random switching signal is generated to randomly switch the relationship of the color component signals. The randomly switched color component signals may be encoded together with the luminance signal to produce a component or composite video signal that is scrambled. The random switching signal may be transmitted as part of the encoded signal or through a separate data channel medium. A descrambling portion first separates the scrambled component or composite video signal into a luminance component and two scrambled color components. The random switching signal transmitted to the descrambler along with the scrambled video signal is used to restore the original relationship between the color component signals. The luminance component as well as the two descrambled color components are then encoded to produce a component or composite video with the relationship between the color components restored to their respective original positions in the video signal. The method may be used in various transmission and recording formats.
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公开(公告)号：DE69505680D1
公开(公告)日：1998-12-03
申请号：DE69505680
申请日：1995-07-27
Applicant: MACROVISION CORP
Inventor： RYAN JOHN
Abstract: A video scrambling and descrambling system that produces color video that is difficult or annoying to watch by randomly switching the color components of a component or composite video. In the scrambling portion, component or composite video is decoded into a luminance component and its two color components. A random switching signal is generated to randomly switch the relationship of the color component signals. The randomly switched color component signals may be encoded together with the luminance signal to produce a component or composite video signal that is scrambled. The random switching signal may be transmitted as part of the encoded signal or through a separate data channel medium. A descrambling portion first separates the scrambled component or composite video signal into a luminance component and two scrambled color components. The random switching signal transmitted to the descrambler along with the scrambled video signal is used to restore the original relationship between the color component signals. The luminance component as well as the two descrambled color components are then encoded to produce a component or composite video with the relationship between the color components restored to their respective original positions in the video signal. The method may be used in various transmission and recording formats.
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公开(公告)号：TR9701540T1
公开(公告)日：1998-02-21
申请号：TR9701540
申请日：1996-05-22
Applicant: MACROVISION CORP
Inventor： RYAN JOHN , COPELAND GREGORY C
IPC: H04N5/91 , G06F1/00 , G06F7/72 , G06F21/24 , G11B20/00 , G11B20/10 , H04L9/32 , H04N5/913 , H04N5/926 , H04N7/08 , H04N7/16 , H04N21/8358
CPC classification number: H04N21/8358 , G06F7/725 , G06F2211/007 , G11B20/00086 , G11B20/00094 , G11B20/00123 , G11B20/00173 , G11B20/0021 , G11B20/00246 , G11B20/00536 , G11B20/00586 , G11B20/00601 , G11B20/00695 , G11B20/00884 , G11B20/00913 , H04L9/3247 , H04L2209/605 , H04N5/913 , H04N5/9261 , H04N7/08 , H04N7/165 , H04N2005/91335 , H04N2005/91342 , H04N2005/91364
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公开(公告)号：CA2195938A1
公开(公告)日：1996-02-22
申请号：CA2195938
申请日：1995-07-27
Applicant: MACROVISION CORP
Inventor： RYAN JOHN
Abstract: A video scrambling and descrambling system that produces color video that is difficult or annoying to watch by randomly switching the color components of a component or composite video. In the scrambling portion, component or composite video is decoded into a luminance component and its two color components. A random switching signal is generated to randomly switch the relationship of the color component signals. The randomly switched color component signals may be encoded together with the luminance signal to produce a component or composite video signal that is scrambled. The random switching signal may be transmitted as part of the encoded signal or through a separate data channel medium. A descrambling portion first separates the scrambled component or composite video signal into a luminance component and two scrambled color components. The random switching signal transmitted to the descrambler along with the scrambled video signal is used to restore the original relationship between the color component signals. The luminance component as well as the two descrambled color components are then encoded to produce a component or composite video with the relationship between the color components restored to their respective original positions in the video signal. The method may be used in various transmission and recording formats.
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Patent Agency Ranking
公开(公告)号：DE69419739T2
公开(公告)日：1999-12-02
申请号：DE69419739
申请日：1994-03-04
Applicant: MACROVISION CORP
Inventor： RYAN JOHN
IPC: G06F1/00 , H04N5/91 , G11B5/86 , G11B20/00 , G11B20/10 , G11B20/12 , H04N5/913 , H04N5/92 , H04N5/94
Abstract: A hybrid digital/analog video recorder prevents both analog and digital copying. The recorder (including a digital tape deck) inputs and outputs both analog and digital video signals. At the analog input, a detector detects conventional copy protection in the analog input video, and in response disables recording thereof. At the digital input, a first detector detects anti-copy bits present in the input material and in response prevents recording. A second bit detector detects serial copy prevention scheme bits, and in response adds an anti-copy bit to the input digital stream, preventing later copying of such material. When another bit detector detects anti-copy bits present in the playback digital data stream prior to conversion to analog, an analog copy protection signal modifies the output analog signal, inhibiting copying of the output signal. In another version, a specially adapted video recorder or playback device copy protects video source material which for technical reasons is not copy protectable. A copy protect "flag" is provided in a predetermined location in the video signal to be protected. The video recorder or playback device,, upon detection of the flag at playback, modifies the output standard (NTSC) video signal with a conventional copy protection process.
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7.发明专利
公开(公告)号：AU700013B2
公开(公告)日：1998-12-17
申请号：AU5869396
申请日：1996-05-22
Applicant: MACROVISION CORP
Inventor： RYAN JOHN , COPELAND GREGORY C
IPC: H04N5/91 , G06F1/00 , G06F7/72 , G06F21/24 , G11B20/00 , G11B20/10 , H04L9/32 , H04N5/913 , H04N5/926 , H04N7/08 , H04N7/16 , H04N21/8358
Abstract: A method and apparatus for copyright protection for various recording media such as Digital Video Discs (DVDs) uses a combination of a Video Finger Print Signal and an Authenticating Signature to permit the player to handle either copy-protected or non-copy-protected media, in a manner that is difficult to compromise. Both a Video Finger Print Signal and an Authenticating Signature are recorded on the media only when copy-protection is required. The nature of this Authenticating Signature is such that it will not be transferred to illicit copies made on CD recorders. When either an original protected or an original non-protected disk is played, the presence or absence of the Authenticating Signature causes the player to correctly play the program video. All original DVDs therefore play normally. When a copy of a non-protected CD is played, the absence of the Video Print Signal also causes the player to correctly playback the video signal data. However, when a copy of a protected CD is played, the absence of the Authenticating Signature causes the player to prohibit the disk from playing normally.
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公开(公告)号：NZ290521A
公开(公告)日：1998-10-28
申请号：NZ29052195
申请日：1995-07-12
Applicant: MACROVISION CORP
Inventor： RYAN JOHN
Abstract: A video recording platform prevents both analog and digital copying of copy protected material. The platform may input and output both analog and digital video signals. At said analog input, a detector detects conventional copy protection in the analog input video, and in response disables recording thereof. At the digital input, a first detector detects a copyright signature present in the input material and in response prevents recording. A specially adapted video recorder, playback device or set top decoder copy protects video source material which has a copyright signature. A copyright signature is provided in a predetermined location in said video signal to be protected. The video recorder, playback device, or set top decoder upon detection of the copyright signature on its input or at playback, modifies the output standard (NTSC) video signal with a conventional copy protection process and the digital output with a new copyright signature. The input digital signal may contain a scrambling of the digital video signal in addition to the copy protection signature. In addition, an authenticating signature may be added to the digital video signal and detected as part of the copy protection process. As part of the copy protection, a television receiver includes a copy protection and descrambling system.
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公开(公告)号：AT462274T
公开(公告)日：2010-04-15
申请号：AT97926424
申请日：1997-05-07
Applicant: MACROVISION CORP
Inventor： RYAN JOHN
Abstract: A video signal is modified so that a television/receiver still produces a normal picture from the modified signal, whereas videotape recording of this signal produces generally unacceptable pictures. Videotape recorders have an automatic gain control circuit (Fig. 2) which measures the sync pulse level in a video signal and develops a gain control correction signal for keeping the video applied to an FM modulator in the videotape recording system at a fixed predetermined level. A portion of the back porch intervals following the trailing edges of a substantial number of sync pulses are significantly raised and lowered to improve the playability of the original signal without reducing the effectiveness of the copy protection of the copied signal. This is achieved most simply by adding pulses to selected lines of the video signal during the back porch interval, which pulses significantly raise or lower the voltage amplitude during the blanking interval so to provide a signal where the average value is approximately equal to the blanking interval. The sync level and the sync duration on the selected lines are also reduced to enhance the effectiveness of the process.
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10.发明专利
公开(公告)号：GR3035549T3
公开(公告)日：2001-06-29
申请号：GR20010400390
申请日：2001-03-09
Applicant: MACROVISION CORP
Inventor： RYAN JOHN , COPELAND GREGORY C
IPC: H04N5/91 , G06F1/00 , G06F7/72 , G06F21/24 , G11B20/00 , G11B20/10 , H04L9/32 , H04N5/913 , H04N5/926 , H04N7/08 , H04N7/16 , H04N21/8358
Abstract: A method and apparatus for copyright protection for various recording media such as Digital Video Discs (DVDs) uses a combination of a Video Finger Print Signal and an Authenticating Signature to permit the player to handle either copy-protected or non-copy-protected media, in a manner that is difficult to compromise. Both a Video Finger Print Signal and an Authenticating Signature are recorded on the media only when copy-protection is required. The nature of this Authenticating Signature is such that it will not be transferred to illicit copies made on CD recorders. When either an original protected or an original non-protected disk is played, the presence or absence of the Authenticating Signature causes the player to correctly play the program video. All original DVDs therefore play normally. When a copy of a non-protected CD is played, the absence of the Video Print Signal also causes the player to correctly playback the video signal data. However, when a copy of a protected CD is played, the absence of the Authenticating Signature causes the player to prohibit the disk from playing normally.
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