| 5905798 |
TIRIS based kernal for protection of "copyrighted" program material |
| May-18-1999 |
The invention consists of attaching or embedding a "TIRIS" transponder (or other RF or IR or barcode or other identifying device) physically into the center of the proposed DVD disk. Within the memory... |
| 5896454 |
System and method for controlling copying and playing of digital programs |
| Apr-20-1999 |
A system and method for preventing effective copying of digital recordings. A copy-state code accompanies each recording, one state of which represents that no copies at all are to be made of the recording.... |
| 5889919 |
Copy protect recording and playback system that enables single authorized recording of protected broadcasts be made |
| Mar-30-1999 |
A recording system that enables single authorized recordings of protected broadcasts be made. Subsequent unauthorized copies are prohibited by encoding a signal that causes the broadcast to be obscured... |
| 5883959 |
Video copy protection |
| Mar-16-1999 |
Regular burst signals from video line (n+0) to line (n+3) are replaced by modified burst signals which function as copy prohibit signals. The phase of the modified burst signals is controlled by controlling... |
| 5875249 |
Invisible image watermark for image verification |
| Feb-23-1999 |
A system quickly verifies that the content of an image has not been changed since an earlier time when the content of that image was stamped. The system consists of a stamping process that embeds stamping... |
| 5832084 |
Recording method of digital magnetic recording medium for copyright protection and variable speed playback |
| Nov-3-1998 |
In a recording method of a digital magnetic recording medium for a copyright protection and a variable speed playback when a user records a digital broadcasting program by a digital video cassette recorder... |
| 5822425 |
Methods of transmitting and recording television signals with copy generating restriction information and recording apparatus therefor |
| Oct-13-1998 |
Information for imposing copy generation restrictions is superimposed in the format of an XDS signal that is according to the standard of a closed caption broadcast so as to permit performance of copy... |
| 5799081 |
Illegal view/copy protection method and apparatus for digital broadcasting system |
| Aug-25-1998 |
An illegal view/copy protection method for a digital broadcasting system is disclosed including an audio/video signal transmission step for multiplexing and transmitting audio/video bit stream scrambled... |
| 5796828 |
Controlled-access broadcast signal receiving system |
| Aug-18-1998 |
An apparatus and method for transferring from a broadcaster to a receiver a limited reproduction right in data. A signal indicating the limited reproduction right is transmitted by the broadcaster and... |
| 5796826 |
Apparatus for limiting reproducible number of magnetic recording medium |
| Aug-18-1998 |
A reproducible number limiting apparatus for a magnetic recording medium using a reproducible number limiting algorithm is disclosed including: scrambling means for scrambling an input bit stream using... |
| 5778140 |
Video signal processing apparatus |
| Jul-7-1998 |
In a reproducing apparatus, a generator circuit for adding copy information during the vertical blanking period of a reproduced video signal output is provided, and copy information in compliance with... |
| 5778064 |
Apparatus and method for processing a high definition video signal |
| Jul-7-1998 |
Digital video tape recorder which reproduces from a record medium a digital high definition video signal having copy-prevention data therein, extracts the copy-prevention data from the reproduced signal,... |
| 5764764 |
Video signal format converting circuit |
| Jun-9-1998 |
A video signal format converting circuit is disclosed, comprising a signal converting matrix circuit and a filter circuit that is constructed of a time delaying device for a video signal corresponding... |
| 5761304 |
Video signal format converting circuit |
| Jun-2-1998 |
A video signal format converting circuit is disclosed, comprising a signal converting matrix circuit and a filter circuit that is constructed of a time delaying device for a video signal corresponding... |
| 5757910 |
Apparatus for preventing illegal copying of a digital broadcasting signal |
| May-26-1998 |
An apparatus for preventing illegal copying of a digital broadcasting signal, comprises a transmission section for generating a copy prevention signal to determine a display time of each field of a digital... |
| 5754649 |
Video media security and tracking system |
| May-19-1998 |
A video disc designed for providing security and tracking data in the rental video media market. Those new formats for video players and media allow for inclusion of security features which both allow... |
| 5754648 |
Video media security and tracking system |
| May-19-1998 |
A system for providing security and tracking data for rental video media, including digital video discs and digital video cassettes. Those new formats for video players and media allow for inclusion of... |
| 5719937 |
Multi-media copy management system |
| Feb-17-1998 |
Reproduction of a data signal which is stored on a source media or distributed via a communication network is controlled by inserting master tag data and control tag data into the data signal. A player/recorder... |
| 5689559 |
Copy prevention method and apparatus of a digital magnetic recording/reproducing system |
| Nov-18-1997 |
A copy prevention method and apparatus of a digital magnetic recording/reproducing system performs the copy prevention function by encoding to insert a marker involving copy prevention function information... |
| 5673357 |
Video recording, transmitting and reproducing apparatus with concurrent recording and transmitting or multiple dubbing of copy protected video signals |
| Sep-30-1997 |
A recording and reproducing apparatus records and reproduces video signals which include video information and copy protection information for restricting the number of times the video information may... |
| 5627655 |
Recording apparatus and reproducing apparatus for video signals |
| May-6-1997 |
In a reproducing apparatus, a generator circuit for adding copy information during the vertical blanking period of a reproduced video signal output is provided, and copy information in compliance with... |
| 5537216 |
Circuit for including a copy-inhibit signal with a video signal |
| Jul-16-1996 |
A spurious signal SSP whose frequency spectrum is located at frequencies [(N+(1/2)).multidot.fh] is multiplexed with a luminance signal Y so as to keep an interleaved relation between the spurious signal... |
| 5535275 |
Apparatus and method for producing scrambled digital video signals |
| Jul-9-1996 |
Unauthorized copying of a video signal is prevented by means of a compression encoding circuit that selectively applies scrambling to the encoded signal. The compression encoding circuit is of the type... |
| 5523853 |
Circuit for including a copy-inhibit signal with a video signal |
| Jun-4-1996 |
A spurious signal SSP whose frequency spectrum is located at frequencies [(N + (1/2)).fh] is multiplexed with a luminance signal Y so as to keep an interleaved relation between the spurious signal SSP... |
| 5418853 |
Apparatus and method for preventing unauthorized copying of video signals |
| May-23-1995 |
In a digital video tape recorder (VTR) which reproduces digital video and audio signals from a magnetic tape, a copy protect bit in the reproduced digital video signal is detected, and on the basis of... |
| 5315448 |
Copy protection for hybrid digital video tape recording and unprotected source material |
| May-24-1994 |
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,... |
| 5216712 |
Recording apparatus |
| Jun-1-1993 |
A recording apparatus for recording a digital data, which includes an orthogonal transform unit for transforming the time axis of the digital data to the frequency axis on a block-by-block basis, a conversion... |
| 5177618 |
Dual deck VCR and duplicating circuit therefor |
| Jan-5-1993 |
A dual deck video cassette recorder, having first and second video decks in a common housing. Each deck has a plurality of heads and both of the decks can playback, and at least one of the decks can record.... |
| 5172241 |
Recording/playback system for VCR |
| Dec-15-1992 |
A recording and playback system for code recording of VCR which comprises a synchronous separator, an 1/2 frequency demultiplier, a microcomputer, a comparator, a control pulse amplifier, a key matrix,... |
| 5134496 |
Bilateral anti-copying device for video systems |
| Jul-28-1992 |
A video system anti-copying device in which leading and trailing code sequences are inserted into the luminance portion of a video signal. These code sequences are visually manifested as dropouts on a... |
| 4945563 |
Video system and method for controlled viewing and videotaping |
| Jul-31-1990 |
A satellite TV or cable video receiver includes a decoder for decoding information embedded in a broadcasted TV program which can be utilized to permit an operator to select the program for viewing only,... |
| 4937679 |
Dual deck video recording apparatus having enhanced copy protection and method for providing enhanced copy protection to such a recording apparatus |
| Jun-26-1990 |
A method and apparatus are described for preventing a dual deck video recorder from being used to record a copy-protected video signal. A switch is included on the recorder to indicate whether a video... |
| 4890319 |
Method for controlling copying of protected information transmitted over a communications link |
| Dec-26-1989 |
A subscription television system for distributing program material protected by copyright to subscribers comprises a transmitter including a data insertion circuit for inserting a control bit in a transmitted... |
