公开(公告)号：US07113597B2

公开(公告)日：2006-09-26

申请号：US10280592

申请日：2002-10-24

申请人： Robert L. Myers

发明人： Robert L. Myers

IPC分类号： H04N7/167

CPC分类号： H04N21/4122 ,  H04N5/913 ,  H04N7/1696 ,  H04N21/4367 ,  H04N2005/91364

摘要： A method and system are provided for protecting an analog video signal sent from a video signal source to a video display enabled to receive a protected video signal. The method includes sending a string of bit values in an encrypted format from the video display to the video signal source. The string of bit values is received in the video signal source and decrypted. The string of bit values is then divided into multi-bit segments in both the video display and the video signal source. A common multi-bit segment in the string of bit values is selected for both the video display and video signal source. A plurality of analog video channels is then sent in a switched order from the video signal source to the video display based on the common multi-bit segment. The plurality of analog video channels is finally decoded in the video display using the common multi-bit segment to decode the switched order.

摘要翻译： 提供了一种用于保护从视频信号源发送的模拟视频信号到能够接收受保护视频信号的视频显示器的方法和系统。 该方法包括将加密格式的比特值串从视频显示发送到视频信号源。 在视频信号源中接收一串比特值并进行解密。 然后将该比特串串在视频显示和视频信号源中分为多位段。 为视频显示和视频信号源选择位值串中的公共多位段。 然后，多个模拟视频信道以切换顺序从视频信号源发送到基于公共多比特段的视频显示。 多个模拟视频通道最终在视频显示器中使用公共多比特段解码，以对切换顺序进行解码。

公开(公告)号：US20050195976A1

公开(公告)日：2005-09-08

申请号：US11083882

申请日：2005-03-17

申请人： Yacov Yacobi ,  Paul England ,  Gideon Yuval

发明人： Yacov Yacobi ,  Paul England ,  Gideon Yuval

IPC分类号： H04N7/169 ,  H04N7/01

CPC分类号： H04N21/4402 ,  H04N7/1696 ,  H04N21/4122 ,  H04N21/43632 ,  H04N21/4367 ,  H04N21/4405 ,  H04N21/4408

摘要： System for protecting copyrighted information, e.g., video signals, from unauthorized copying. Analog red (R), green (G) and blue (B) video signals are transmitted from a source device, e.g., a display adapter, to a display device, e.g., a monitor, over corresponding analog signal lines after the identify of the destination device is confirmed by receipt of a certificate assigned to the destination device. A session key, used for encrypting the analog signals, is generated and exchanged between the source and destination devices after the identification of the destination device is confirmed. The source and destination devices each includes a pseudo-random number generator driven by the session key. The lines that carry the R, G and B video signals are changed, e.g., swapped, on a periodic basis as a function of the output of the pseudo-random number generator in the source device. The destination device, which has an input to its pseudo-random number generator synchronized with the random number generator of the source device, decrypts the received video signals in a complimentary fashion to the encryption. Encrypted digital information subject to copying constraints may be supplied to a display adapter via an IEEE 1394 compliant bus.

摘要翻译： 用于保护受版权保护的信息（例如，视频信号）的未经授权的复制的系统。 模拟红色（R），绿色（G）和蓝色（B）视频信号从源设备（例如显示适配器）传输到显示设备，例如监视器，在相应的模拟信号线上， 通过接收分配给目的地设备的证书来确认目的地设备。 在确认目的地设备的识别之后，在源设备和目的设备之间生成用于加密模拟信号的会话密钥。 源和目标设备每个都包括由会话密钥驱动的伪随机数发生器。 作为源设备中的伪随机数发生器的输出的函数，周期性地改变携带R，G和B视频信号的线路，例如交换。 具有与源设备的随机数发生器同步的其伪随机数发生器的输入的目的地设备以接收的视频信号以加密方式互补地解密。 受复制限制的加密数字信息可以通过IEEE 1394兼容总线提供给显示适配器。

公开(公告)号：US20040083376A1

公开(公告)日：2004-04-29

申请号：US10280592

申请日：2002-10-24

发明人： Robert L. Myers

IPC分类号： H04L009/32

CPC分类号： H04N21/4122 ,  H04N5/913 ,  H04N7/1696 ,  H04N21/4367 ,  H04N2005/91364

摘要： A method and system are provided for protecting an analog video signal sent from a video signal source to a video display enabled to receive a protected video signal. The method includes sending a string of bit values in an encrypted format from the video display to the video signal source. The string of bit values is received in the video signal source and decrypted. The string of bit values is then divided into multi-bit segments in both the video display and the video signal source. A common multi-bit segment in the string of bit values is selected for both the video display and video signal source. A plurality of analog video channels is then sent in a switched order from the video signal source to the video display based on the common multi-bit segment. The plurality of analog video channels is finally decoded in the video display using the common multi-bit segment to decode the switched order.

摘要翻译： 提供了一种用于保护从视频信号源发送的模拟视频信号到能够接收受保护视频信号的视频显示器的方法和系统。 该方法包括将加密格式的比特值串从视频显示发送到视频信号源。 在视频信号源中接收一串比特值并进行解密。 然后将该比特串串在视频显示和视频信号源中分为多位段。 为视频显示和视频信号源选择位值串中的公共多位段。 然后，多个模拟视频信道以切换顺序从视频信号源发送到基于公共多比特段的视频显示。 多个模拟视频通道最终在视频显示器中使用公共多比特段解码，以对切换顺序进行解码。

公开(公告)号：US20040047469A1

公开(公告)日：2004-03-11

申请号：US10356327

申请日：2003-01-31

发明人： John O. Ryan ,  James R. Holzgrafe ,  Mark A. Hollar

IPC分类号： H04N007/167

CPC分类号： H04N7/1696 ,  H04N5/913 ,  H04N7/015 ,  H04N7/08 ,  H04N7/088 ,  H04N7/167 ,  H04N7/1693 ,  H04N21/835 ,  H04N2005/91357

摘要： Method and apparatus for scrambling a high definition television signal to discourage unauthorized recording of same. While recording per se is not prevented, the resulting recorded signal is rendered unusable due to an induced nullwobblenull between the active video and the associated sync pulses. The scrambled television signal is readily viewable on a compliant high definition television set which descrambles the HDTV signal using an encoded indication of the amount of wobble accompanying the HDTV signal. Also provided is a special interface to prevent unauthorized persons from using the indication of the amount of wobble so as to defeat the scrambling. Also provided are method and apparatus for defeating the scrambling method and hence allowing recording of the scrambled video signal.

摘要翻译： 用于扰乱高分辨率电视信号以阻止其未经授权记录的方法和装置。 虽然不能防止记录本身，但是由于在活动视频和相关联的同步脉冲之间引起的“摆动”，所产生的记录信号变得不可用。 加扰的电视信号可以在兼容的高分辨率电视机上容易地观看，该电视机使用伴随HDTV信号的摆动量的编码指示对HDTV信号进行解扰。 还提供了防止未经授权的人使用摆动量的指示以防止扰乱的特殊接口。 还提供了用于消除加扰方法并因此允许记录加扰视频信号的方法和装置。

公开(公告)号：US06570990B1

公开(公告)日：2003-05-27

申请号：US09192102

申请日：1998-11-13

申请人： Leslie Kohn ,  David A. Barr ,  Didier Le Gall

发明人： Leslie Kohn ,  David A. Barr ,  Didier Le Gall

IPC分类号： H04N7167

CPC分类号： H04N11/002 ,  H04N7/1675 ,  H04N7/1696 ,  H04N21/2347 ,  H04N21/4408

摘要： A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to generate a sequence, of pseudo-random values for the color component; and an adder coupled to the offset generator and to the color component signal for providing an encoded color component signal. The system also includes a decryptor with a decryptor offset generator adapted to receive the encrypted frame key and to generate a decryptor pseudo-random value for the color component; and a subtractor coupled to the offset generator and to the color component signal for subtracting the offset signal from the color component signal.

摘要翻译： 系统控制发射机和接收机之间的视频传输的再现。 该系统包括具有偏移生成器的加密器，其适于接收加密的帧密钥并生成用于颜色分量的伪随机值的序列; 以及耦合到偏移发生器和用于提供编码颜色分量信号的颜色分量信号的加法器。 所述系统还包括具有解密器偏移生成器的解密器，所述解密器偏移生成器适于接收所述加密的帧密钥并且生成所述颜色分量的解密器伪随机值; 以及耦合到偏移发生器的减法器和用于从颜色分量信号中减去偏移信号的颜色分量信号。

公开(公告)号：US06542609B1

公开(公告)日：2003-04-01

申请号：US09483594

申请日：2000-01-14

申请人： John O. Ryan ,  James R. Holzgrafe ,  Mark A. Hollar

发明人： John O. Ryan ,  James R. Holzgrafe ,  Mark A. Hollar

IPC分类号： H04N7167

CPC分类号： H04N7/1696 ,  H04N5/913 ,  H04N7/015 ,  H04N7/08 ,  H04N7/088 ,  H04N7/167 ,  H04N7/1693 ,  H04N21/835 ,  H04N2005/91357

摘要： Method and apparatus for scrambling a high definition television signal to discourage unauthorized recording of same. While recording per se is not prevented, the resulting recorded signal is rendered unusable due to an induced “wobble” between the active video and the associated sync pulses. The scrambled television signal is readily viewable on a compliant high definition television set which descrambles the HDTV signal using an encoded indication of the amount of wobble accompanying the HDTV signal. Also provided is a special interface to prevent unauthorized persons from using the indication of the amount of wobble so as to defeat the scrambling. Also provided are method and apparatus for defeating the scrambling method and hence allowing recording of the scrambled video signal.

摘要翻译： 用于扰乱高分辨率电视信号以阻止其未经授权记录的方法和装置。 虽然不能防止记录本身，但是由于在活动视频和相关联的同步脉冲之间引起的“摆动”，所产生的记录信号变得不可用。 加扰的电视信号可以在兼容的高分辨率电视机上容易地观看，该电视机使用伴随HDTV信号的摆动量的编码指示对HDTV信号进行解扰。 还提供了防止未经授权的人使用摆动量的指示以防止扰乱的特殊接口。 还提供了用于消除加扰方法并因此允许记录加扰视频信号的方法和装置。

公开(公告)号：US5844988A

公开(公告)日：1998-12-01

申请号：US400831

申请日：1995-03-08

申请人： John O. Ryan ,  James R. Holzgrafe

发明人： John O. Ryan ,  James R. Holzgrafe

IPC分类号： H04H20/00 ,  H04K1/00 ,  H04K1/02 ,  H04L9/00 ,  H04N7/169

CPC分类号： H04N7/1696 ,  H04N7/1693

摘要： A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line, thus providing both security and concealment. The security is enhanced by filling in the gap between the nominal beginning of active video and the actual beginning of active video with a synthesized video signal which replicates the adjacent active video using a digitally generated filling pattern. Also, a random noise overlay further conceals the location of the gap. Additional concealment is provided by wiggling in time the location of the horizontal sync signal using one or two frequencies and also by randomly altering the location of the vertical sync signal. The NTSC digital encoding in accordance with the invention is simplified by using only two channels, chrominance and luminance, and by a heterodyne circuit for chrominance stability. NTSC encoding is enhanced by providing detail normally lost, by use of the chroma channel. Additionally, a non-standard video signal may be provided with a portion of the colorburst on the front porch of the horizontal blanking, thus allowing use of a relatively simple decoder.

公开(公告)号：US5555305A

公开(公告)日：1996-09-10

申请号：US211279

申请日：1994-06-13

申请人： Adrian P. Robinson ,  Christopher K. P. Clarke ,  Andrew J. Bower

发明人： Adrian P. Robinson ,  Christopher K. P. Clarke ,  Andrew J. Bower

IPC分类号： C07C67/29 ,  C08G63/21 ,  C08G63/52 ,  C08G63/676 ,  C08G63/91 ,  H04N7/169 ,  H04N7/173 ,  H04N7/167

CPC分类号： H04N7/1696 ,  C07C67/29 ,  C08G63/21 ,  C08G63/676 ,  H04N7/17327

摘要： Video signals are sampled at 4Fsc locked onto sub-carrier phase and frequency. The active picture lines of each field are divided into 6 blocks of 47 lines and the active line periods of those lines scrambled on a block by block basis by line order shuffling. The shuffling algorithm is generated by a line shuffling permutator driven by a PRBS generator (controls 36, 38). Active line period samples for one block are written in unscrambled form into a first memory block (32) and samples from the previous block are read out in scrambled form from a second memory block (34) for transmission. The complementary process takes place in the decoder.

摘要翻译： PCT No.PCT / GB92 / 01786 Sec。 371日期1994年6月13日 102（e）日期1994年6月13日PCT提交1992年9月29日PCT公布。 出版物WO93 / 07718 日期：1993年04月15日视频信号在4Fsc处被采样锁定到子载波相位和频率上。 每个场的活动图像行被划分成47行的6个块，并且这些行的有效行周期按行顺序改组逐个块地加扰。 混洗算法由PRBS发生器驱动的线洗牌排列器产生（对照36,38）。 一个块的有效行周期采样以未加扰的形式写入第一存储器块（32），并且来自前一块的采样以加扰形式从第二存储器块（34）读出以进行传输。 互补过程发生在解码器中。

公开(公告)号：US5455860A

公开(公告)日：1995-10-03

申请号：US48791

申请日：1993-04-16

申请人： Masayoshi Hirashma

发明人： Masayoshi Hirashma

IPC分类号： H04N5/913 ,  H04N5/92 ,  H04N7/169 ,  H04N7/167

CPC分类号： H04N5/913 ,  H04N5/92 ,  H04N7/1696 ,  H04N2005/91364

摘要： A scramble codec comprises a nonvolatile key data memory which holds a key data varying from one video recorder to another, a pair of line memories in which input picture signals are alternately written for each horizontal scan line, a nonlinear feedback shift register which is initialized with the output of the key data memory to output dissimilar pseudorandum pulse signals for respective horizontal scan lines, an address setting circuit which sets, as the initial value for scrambling, a value corresponding to the output of the nonlinear feedback shift register and, as the initial value for descrambling, a value obtained by subtracting the output of the nonlinear feedback shift register from the maximum address value of each line memory and an address counter which generates a consecutive series of addresses beginning with the address set by the above address setting circuit and applies a signal for each horizontal scan line alternately to the pair of line memories.

摘要翻译： 扰频编解码器包括一个非易失性密钥数据存储器，其保存从一个录像机到另一个录像机变化的密钥数据，一对行存储器，其中每个水平扫描线交替地写入输入图像信号;非线性反馈移位寄存器，其被初始化为 输出关键数据存储器，输出相应的水平扫描线的不相似的伪随机脉冲信号;地址设定电路，其设定与非线性反馈移位寄存器的输出对应的值作为加扰的初始值，作为初始值 用于解扰的值，通过从每行行存储器的最大地址值减去非线性反馈移位寄存器的输出而得到的值和产生由上述地址设置电路设置的地址开始的连续地址序列的地址计数器，并应用 每个水平扫描线的信号交替地与一对行存储器。

公开(公告)号：US5243411A

公开(公告)日：1993-09-07

申请号：US892039

申请日：1992-06-02

申请人： Yoshiki Shirochi ,  Toshihiko Numakura ,  Isao Saito

发明人： Yoshiki Shirochi ,  Toshihiko Numakura ,  Isao Saito

IPC分类号： H04N5/91 ,  H04N9/79

CPC分类号： H04N7/1696

摘要： An anti-piracy signal generating circuit for generating anti-piracy signal components on a video signal reproduced by a first video unit, the signal components being interleaved to a frequency f.sub.H in the band of the video signal in accordance with the video signal components and a signal superimposing circuit for superimposing the anti-piracy signal components intermittenly on the luminance signal, first color difference signal, and second color difference signal.