利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

60 条记录 (耗时 0.02 秒)

    Method and apparatus for concealing a composite video signal by use of sync wiggle
    3.
    发明公开
    Method and apparatus for concealing a composite video signal by use of sync wiggle 失效
    用于通过同步信号的颤动隐藏的复合视频信号的方法和装置

    公开(公告)号：EP1233620A1

    公开(公告)日：2002-08-21

    申请号：EP02007748.3

    申请日：1992-11-13

    申请人： MACROVISION CORPORATION

    发明人： Ryan, John O. ,  Quan, Ronald ,  Holzgrafe, James R. ,  Wonfor, Peter J.

    IPC分类号： 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.

    摘要翻译： 一种视频加扰系统诱导的随机摆动，即，时移，在视频帧的活动部分的位置，而不会影响在每个视频行的脉冲串的水平同步信号和颜色，从而提供了安全性和隐蔽性。 安全是通过在有效视频信号的标称始端和有效视频的与合成的视频信号，该信号复制用数字方式产生填充图案的邻将activeVideoPlayerIndex实际开始之间的间隙填充增强。 所以，随机噪声覆层还隐藏的缺口位置。 附加的隐蔽是通过在时间上扭动使用一个或两个频率的水平同步信号的位置通过随机改变垂直同步信号的位置设置，因而。 在与本发明雅舞蹈的NTSC数字编码是通过仅使用两个通道，色度和亮度，并且通过对色度稳定性的外差电路简化。 NTSC编码是通过提供细节通常丢失时，通过使用色度通道的增强。 此外，一个非标准视频信号可以被提供有突发在水平消隐的前沿的颜色的至少一部分，从而允许使用相对简单的解码器。

    Copy protection in data transmission and processing
    4.
    发明公开
    Copy protection in data transmission and processing 失效
    数据传输和处理中的复制保护

    公开(公告)号：EP0831648A3

    公开(公告)日：1998-04-08

    申请号：EP97307220.0

    申请日：1997-09-11

    申请人： SONY CORPORATION

    发明人： Ezaki, Tadashi, c/o Intellectual Property Division ,  Hirai, Jun, c/o Intellectual Property Division

    IPC分类号： H04N5/913

    CPC分类号： H04N21/4408 ,  H04N5/913 ,  H04N7/163 ,  H04N7/1693 ,  H04N2005/91314 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/91371

    摘要： A digital satellite broadcasting system for providing copy protection or so-called macrovision signals which hinder the recording of designated picture signals and which do not adversely affect the performance of a television receiver. Such satellite broadcasting system may include a broadcasting station (100), a satellite (200), and a plurality of satellite receivers (31) each located at a subscriber's premises and coupled to the subscriber's television receiver (60) and recording/reproducing device (VTR) (70). Parameters pertaining to a number of types of television receivers (60) may be transmitted from the satellite broadcasting station (100) by way of the satellite (200) to the satellite receivers (31). Upon receiving such transmitted parameters, each respective satellite receiver (31) obtains the parameters associated with the respective television (60). Such obtained parameters are utilized in forming a macrovision signal which is combined with video data and supplied to the respective television receiver (60). As a result of using parameters associated with the respective television receiver (60) in forming the macrovision signal, the performance of such television receiver (60) is not adversely affected and picture signals of designated programs which are recorded on the VTR (70) will produce unacceptable pictures upon reproduction so as to provide the desired copy protection.

    摘要翻译： 数字卫星广播系统，用于提供防止指定图像信号记录并且不会不利地影响电视接收机性能的复制保护或所谓的宏视信号。 这种卫星广播系统可以包括一个广播站（100），一个卫星（200）和多个卫星接收器（31），每个卫星接收器位于一个用户的房屋内，并连接到该用户的电视接收机（60）和记录/再现设备 VTR）（70）。 可以通过卫星（200）从卫星广播站（100）向卫星接收器（31）发送与多种类型的电视接收机（60）有关的参数。 在接收到这样的传输参数后，每个相应的卫星接收器（31）获得与相应电视机（60）相关的参数。 这样获得的参数被用于形成与视频数据组合并被提供给相应的电视接收机（60）的宏视信号。 由于在形成宏视信号时使用与各个电视接收机（60）相关的参数，这种电视接收机（60）的性能不会受到不利影响，并且记录在VTR（70）上的指定节目的图像信号将 在复制时产生不可接受的图片，以提供所需的复制保护。

    MPEG data stream decoder
    5.
    发明公开
    MPEG data stream decoder 失效
    MPEG-Datenstromdekodierer

    公开(公告)号：EP0786908A2

    公开(公告)日：1997-07-30

    申请号：EP96305599.1

    申请日：1996-07-29

    申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

    发明人： Hiraki, Toshiyuki, c/o Mitsubishi Denki K.K. ,  Yamada, Akira, c/o Mitsubishi Denki K.K. ,  Oki, Masashi, c/o Mitsubishi Denki K.K.

    IPC分类号： H04N7/52

    CPC分类号： H04N21/2368 ,  H04L7/10 ,  H04N7/1693 ,  H04N7/1713 ,  H04N7/24 ,  H04N19/00 ,  H04N19/61 ,  H04N19/70 ,  H04N21/4305 ,  H04N21/4341 ,  H04N21/4348

    摘要： A coded-signal decoding circuit in which, when a signal indicating a transition state from a synchronized state to an asynchronous state is outputted from a synchronous state register (8), data "0" generated by a "0" generating circuit (20) are stored in a data memory (10) instead of an output of an audio signal generating circuit (6), thus initializing the data memory (10) in advance. In a conventional coded-signal decoding circuit, when a transition was made from a synchronized state to an asynchronous state after failing to establish synchronization, the data memory (10) had to be initialized at a point in time before starting the next synchronous detection, presenting a problem in terms of time. The invention further provides a synchronous control method.

    摘要翻译： 一种编码信号解码电路，其中当从同步状态寄存器（8）输出表示从同步状态到异步状态的转移状态的信号时，由“0”生成电路（20）产生的数据“0” 存储在数据存储器（10）中而不是音频信号发生电路（6）的输出，从而预先初始化数据存储器（10）。 在传统的编码信号解码电路中，当在不能建立同步之后从同步状态转变为异步状态时，必须在开始下一个同步检测之前的时间点对数据存储器（10）进行初始化， 在时间上出现问题。 本发明还提供一种同步控制方法。

    Method and apparatus for scrambling and descrambling of video signals with edge fill
    8.
    发明公开
    Method and apparatus for scrambling and descrambling of video signals with edge fill 失效
    Verfahren und Vorrichtung zurVideosignalverschlüsselungund-entschlüsselungmitKantenfüllung。

    公开(公告)号：EP0543294A1

    公开(公告)日：1993-05-26

    申请号：EP92119481.7

    申请日：1992-11-13

    申请人： MACROVISION CORPORATION

    发明人： Ryan, John O. ,  Quan, Ronald ,  Holzgrafe, James R. ,  Wonfor, Peter J.

    IPC分类号： H04N7/167

    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.

    摘要翻译： 视频加扰系统在视频帧的有效部分的位置处引起随机摆动，即时移，而不影响每个视频行中的水平同步信号和色突，从而提供安全性和隐藏性。 通过使用使用数字生成的填充模式复制相邻活动视频的合成视频信号填充活动视频的标称开始与有效视频的实际开始之间的间隙来增强安全性。 而且，随机噪声叠加进一步隐藏间隙的位置。 通过使用一个或两个频率在时间上摆动水平同步信号的位置并且还通过随机改变垂直同步信号的位置来提供额外的隐藏。 根据本发明的NTSC数字编码通过仅使用两个通道，色度和亮度以及通过外差电路来实现色度稳定性被简化。 通过使用色度通道提供通常丢失的细节来增强NTSC编码。 此外，非标准视频信号可以在水平消隐的前沿上提供一部分色彩，从而允许使用相对简单的解码器。

    Method and apparatus for encrypting and decrypting time domain signals
    9.
    发明公开
    Method and apparatus for encrypting and decrypting time domain signals 失效
    加密和分解时域信号的方法和装置

    公开(公告)号：EP0416894A3

    公开(公告)日：1992-05-27

    申请号：EP90309714.5

    申请日：1990-09-05

    申请人： MACROVISION CORPORATION

    发明人： Ryan, John O.

    IPC分类号： H04N7/167

    CPC分类号： H04N7/1693

    摘要： A technique for encrypting and decrypting information signals normally arranged as a succession of lines of active information, with each line having a line timing reference, such as color video information signals. The active video portion is time shifted with respect to the horizontal sync portion of the corresponding line using a predetermined slowly varying time shifting function. The time shifting information is conveyed to the decryption site by encoding the instantaneous value of the time shifting wave form for the beginning of each field in the vertical blanking portion of that field. To provide a reasonable maximum time shifting range, portions of the trailing edge of the active video in the preceding line and portions of the leading edge of the active video in the current line are discarded. During decryption, the original line timing and color burst signals are discarded and new signals are generated which are time displaced from the active videos portion by the original amount before encryption.

    Method and apparatus for encrypting and decrypting time domain signals
    10.
    发明公开
    Method and apparatus for encrypting and decrypting time domain signals 失效
    加密和分解时域信号的方法和装置

    公开(公告)号：EP0345952A3

    公开(公告)日：1991-03-06

    申请号：EP89304793.6

    申请日：1989-05-11

    申请人： MACROVISION CORPORATION

    发明人： Ryan, John O.

    IPC分类号： H04N7/167

    CPC分类号： H04N7/1693 ,  H04N5/913 ,  H04N2005/91364

    摘要： Time sequential information signals, such as color video signals having a line timing reference and an active video portion, are encrypted by time shifting the active video signal portion towards and away from the line timing reference signal in psuedo-random fashion prior to broadcasting or recording on tape or disk and transmittal to the user. The signals are decrypted by an inverse time shifting technique. By limiting the amount of time shifting between lines, potential signal degradation for color video signals is minimized, and drop out compensation processing is minimally affected, so that the color resolution and picture quality are substantially unaffected. Various levels of security are attainable, ranging from a simple security technique in which the intra field time shifting information is encoded along with the active video to a relatively sophisticated, high security level in which the number of decryption signal processing attempts and the time period within which decryption processing is permitted are limited.