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1. 发明申请

WO1991013517A1 VIDEO SIGNAL SCRAMBLING AND UNSCRAMBLING DEVICE 审中-公开
标题翻译：视频信号屏蔽和非屏蔽设备
公开(公告)号：WO1991013517A1
公开(公告)日：1991-09-05
申请号：PCT/CH1991000042
申请日：1991-02-21
申请人： KUDELSKI S.A. FABRIQUE D'ENREGISTREURS NAGRA , KUDELSKI, André
发明人： KUDELSKI S.A. FABRIQUE D'ENREGISTREURS NAGRA
IPC分类号： H04N07/167
CPC分类号： H04N7/1696
摘要： A scrambling method wherein each image line (23-309) of a frame having been produced in unscrambled form before being scrambled, is given the pseudorandomly determined address (B) of the memory line in the storage memory (8) in which said image line is to be stored on reception; and wherein the moment (or the running order) for broadcasting said image line is determined so that on reception, the image line causes, because it is stored in the memory line to which it was addressed, the image line previously stored at the same address to be output to the television set at the right moment (or in the right order) so that an unscrambled picture is reconstructed.

2. 发明申请

WO1994002937A2 DATA SIGNAL RECORDING AND REPRODUCTION METHOD 审中-公开
标题翻译：数据信号记录和再现方法
公开(公告)号：WO1994002937A2
公开(公告)日：1994-02-03
申请号：PCT/EP1993001904
申请日：1993-07-19
申请人： KUDELSKI S.A. FABRIQUE D'ENREGISTREURS NAGRA , SCHLUP, Jean-Claude
发明人： KUDELSKI S.A. FABRIQUE D'ENREGISTREURS NAGRA
IPC分类号： G11B0
CPC分类号： G11B20/1208 , G11B5/0086 , G11B27/032 , G11B27/06
摘要： A digital signal recording and reproduction method, comprising subdivision into a series of sectors and groups of sectors, whereafter each group is re-ordered in order to record the resulting group on successive inclined tracks on a magnetic tape, said re-ordering being such that the sectors are grouped on the tape (10) in such a way as to form virtual tracks (W1) extending physically along a line (L) which is perpendicular to the magnetic tape (10). Sections of the tape may then be cut and joined together again without disrupting the reading of the resulting tape.
摘要翻译：一种数字信号记录和再现方法，包括细分成一系列扇区和扇区组，之后每组被重新排序，以将结果组记录在磁带上的连续倾斜的轨道上，所述重新排序使得这些扇区以形成沿着垂直于磁带（10）的线（L）物理延伸的虚拟轨道（W1）的方式分组在磁带（10）上。然后可以将带的切片再次切割并连接在一起，而不会中断所得到的带的读取。

3. 发明申请

WO1990010354A1 PRE-PAYMENT TELEVISION SYSTEM USING A MEMORY CARD ASSOCIATED WITH A DECODER 审中-公开
标题翻译：使用与解码器相关联的记忆卡的预付费电视系统
公开(公告)号：WO1990010354A1
公开(公告)日：1990-09-07
申请号：PCT/CH1990000040
申请日：1990-02-21
申请人： KUDELSKI S.A. FABRIQUE D'ENREGISTREURS NAGRA , KUDELSKI, André
发明人： KUDELSKI S.A. FABRIQUE D'ENREGISTREURS NAGRA
IPC分类号： H04N07/167
CPC分类号： H04N7/1675
摘要： According to the invention, on the emitter side, a number generator (10) delivers a random code (XAL) which is sent to the input of a master card (11) which ciphers such code according to a predetermined key (100), the code thus ciphered is broadcast with the video signal, a first device (17) receives on the one hand the random code (XA) and on the other hand the code ciphered by the master card (11) and effects a predetermined numerical combination of these two codes, such combination forming the initialization word of a pseudo-random generator (12) intended to provide a table of codes for scrambling the video signal and, on the receiver side, the ciphered code received is deciphered by a customer card (13), a second device (18) receives at the inputs on the one hand the ciphered code and on the other hand the code deciphered (XA) by the customer card (13) and effects a numerical combination of these two codes which is similar to the combination of the first device (17).
摘要翻译：根据本发明，在发射器侧，数字发生器（10）传送随机码（XAL），该随机码（XAL）被发送到根据预定密钥（100）对这些码进行加密的主卡（11）的输入，这样加密的代码与视频信号进行广播，第一设备（17）一方面接收随机码（XA），另一方面接收由主卡（11）加密的代码，并且实现这些两个代码，形成用于提供用于加扰视频信号的代码表的伪随机生成器（12）的初始化字的组合，并且在接收机侧形成接收到的加密代码，由客户卡（13）解密，第二设备（18）一方面在输入端接收加密代码，另一方面接收由客户卡（13）解密的代码（XA），并且实现这两个代码的数字组合，其类似于第一装置（17）的组合。

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