| 7043019 |
Copy protection for digital motion picture image data |
| May-9-2006 |
An apparatus and method for displaying a copy-deterrent pattern (104) within a digital motion picture in order to discourage recording of the motion picture using a video camera or other sampling recording... |
| 7043019 |
Copy protection for digital motion picture image data |
| May-9-2006 |
An apparatus and method for displaying a copy-deterrent pattern (104) within a digital motion picture in order to discourage recording of the motion picture using a video camera or other sampling recording... |
| 6882839 |
One-way roaming from ANS-41 to GSM systems |
| Apr-19-2005 |
Disclosed is a method and apparatus for providing authentication for a subscriber of a wireless communication system employing one type of authentication technology roaming into a wireless communication... |
| 6711261 |
Enhancing concealment in the presence of fine mistuning for various TV scrambling techniques |
| Mar-23-2004 |
An improved method and apparatus for maintaining concealment for a scrambled signal when frequency pre-emphasis is used to defeat the scrambling. The pre-emphasis may be synthesized with high pass or peaking... |
| 6584310 |
Method and apparatus for performing authentication in communication systems |
| Jun-24-2003 |
A method and apparatus for permitting global roaming between two communication networks which utilize different authentication schemes. The authentication interoperability function (AIF) and method translate... |
| 6243465 |
Method of providing video programming nearly on demand |
| Jun-5-2001 |
A method for providing video programming in a nearly on demand basis is disclosed. A video network includes a video server that operates several video recorders to simultaneously exhibit video performances... |
| 6198822 |
Enhanced scrambling of slowly changing video signals |
| Mar-6-2001 |
An enhanced scrambled video signal, method for making an enhanced scrambled video signal and apparatus for enhanced scrambling of a video signal are all characterized by a pattern added to a video signal.... |
| 6009172 |
Method and apparatus for optimizing scrambling concealment of a video signal by modifying a specialized sync pulse |
| Dec-28-1999 |
A technique for improving the scrambling concealment of a video signal and the like when displayed on a television set or monitor, includes the pulse width and/or pulse position modulation of a horizontal... |
| 5844988 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
| Dec-1-1998 |
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,... |
| 5841863 |
Method and apparatus for scrambling and descrambling of video signals with edge fill |
| Nov-24-1998 |
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,... |
| 5671278 |
Video scrambling with variable function generator |
| Sep-23-1997 |
A video scrambling and descrambling arrangement utilizes plural scrambling characteristics including a predetermined scrambling waveform and a selectable one of a plurality of phase relationships with... |
| 5617475 |
Scrambling and descrambling of video signals using horizontal line combinations |
| Apr-1-1997 |
A plurality of video lines in a raster scan video image are scrambled by delaying a first video line in time equal to the horizontal line scan time for the raster scan video field to produce a delayed... |
| 5608799 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
| Mar-4-1997 |
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,... |
| 5579390 |
Method and apparatus for vertically scrambling and descrambling of video signals |
| Nov-26-1996 |
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,... |
| 5553141 |
Encryption and decryption (scrambling and unscrambling) of video signals |
| Sep-3-1996 |
A video signal is encrypted by pseudo-random variation of portions of lines thereof to be horizontally scanned that are devoid of video information. Thus, the durations of line blanking intervals may be... |
| 5504815 |
Method and apparatus for scrambling and descrambling |
| Apr-2-1996 |
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,... |
| 5438620 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
| Aug-1-1995 |
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,... |
| 5410601 |
Video scramble system and equipment |
| Apr-25-1995 |
The object of the present invention is to provide various scramble systems and equipments for embodying the scramble systems for omitting unqualified viewers in a pay TV system such as CATV. One of the... |
| 5212723 |
Burst phase correction system for video descrambling |
| May-18-1993 |
A method and apparatus for synchronizing a randomized video signal to a phase-locked sampling system. The phase-locked system is part of a scrambling apparatus capable of scrambling and subsequent descrambling... |
| 5161188 |
Scrambling video by horizontal and vertical time shifting |
| Nov-3-1992 |
A system for scrambling and descrambling the image associated with a video signal employs the shifting in time of a video image after removal of vertical and horizontal synchronization, and color burst... |
| 5146496 |
Method and apparatus for enhancing the security of a scrambled television signal |
| Sep-8-1992 |
The scrambling security of a sync suppressed television signal is enhanced by eliminating the fixed time relationship between the normal color burst component and synchronization information in successive... |
| 5058157 |
Method and apparatus for encrypting and decrypting time domain signals |
| Oct-15-1991 |
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... |
| 5003592 |
Scrambling video by time shifting |
| Mar-26-1991 |
A system for scrambling and descrambling the image associated with a video signal employs the shifting in time of a video image after removal of synchronization and color burst reference signals. Coded... |
| 4916736 |
Method and apparatus for encrypting and decrypting time domain signals |
| Apr-10-1990 |
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... |
| 4901349 |
Time dispersal encryption of TV signals |
| Feb-13-1990 |
In encrypting a video signal for communications security, the horizontal synchronization pulses are removed, the active signal portions of each line in a field are delayed according to psuedorandom sequence... |
| 4642688 |
Method and apparatus for creating encrypted and decrypted television signals |
| Feb-10-1987 |
A method and apparatus for creating a television signal and encrypting or decrypting the signal at the same time. Luminance and chrominance information are received by the apparatus and stored in separate... |
| 4594609 |
Scrambling system for television video signal |
| Jun-10-1986 |
A method and apparatus for scrambling a composite television signal and method and apparatus for unscrambling of the scrambled television signal are disclosed in the present application. The method of... |
| 4466017 |
Sync suppression scrambling of television signals for subscription TV |
| Aug-14-1984 |
In order to provide higher efficiency of security in sync suppression scrambling of subscription TV signals, the signals are encoded with a timing pulse having a selected time delay relationship with the... |
| 4458268 |
Sync displacement scrambling |
| Jul-3-1984 |
A subscription television system comprises means for broadcasting a scrambled television signal wherein the NTSC horizontal and vertical synchronization signals are displaced in time from their nominal... |
| 4392021 |
Secure facsimile transmission system using time-delay modulation |
| Jul-5-1983 |
Method and apparatus for secure transmission of analog signals, particularly facsimile signals. The analog signal is first converted to a frequency-modulated signal, if not already one, and is then converted... |
| 4378570 |
Receiver for jam-resistant TV system |
| Mar-29-1983 |
A jam-resistant receiver for a TV signal in which each vertical sync pulse is replaced by several increasingly-delayed symbols from a pseudo-random number generator. A correlator produces a correlation... |
| 4333107 |
Jam-resistant TV system |
| Jun-1-1982 |
A jam-resistant TV transmission system including means to transmit a composite video signal in which each vertical sync pulse is replaced by several increasingly-delayed symbols from a pseudo-random number... |
