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Class 380/235 - Phase inversion of scan line information


Subclass of Class 380 - Cryptography
Definition: Subject matter which inverts the phase of selected video
No. of patents: 55
Last issue date: 09/09/2008


1    
NumberTitleIssue Date
7424739On-machine communication verification
The present invention provides for validating that one or more modules reside on the same machine. When a second module wishes to establish communication with a first module, a shared memory that is accessible by the modules—but inaccessible by modules outside the...
09/09/2008
7348955Method of controlling display method, display-use signal producing device, display device, and display system for implementing the method
The sending party of a display-use image signal adds to a signal representing a display image a control parameter signal composed of a control tag signal specifying a controlled object and control start/end identification signal Ts or Te between a specific parameter...
03/25/2008
7302162Modulation of a video signal with an impairment signal to increase the video signal masked threshold
An impairment signal is introduced into an original visual signal, either electronically or optically, that is not noticeable in a display of the original visual signal but is noticeable in a copy made of the display by a camcorder or other camera, thereby discourag...
11/27/2007
7221338Display device
The present invention is intended to suppress power consumption of an EL display. In accordance with the brightness of an image to be displayed in a pixel portion, the contrast of the image is determined whether to be inverted or not, and the number of bits of the d...
05/22/2007
7221759Projector with enhanced security camcorder defeat
A projector (10) with enhanced security camcorder defeat including a copy protection illumination system (1) for illuminating a spatial light modulator (30) comprises: a polychromatic light source (20); uniformizing optics (22) for...
05/22/2007
7218754Visual copyright protection
A visual copyright protection system is disclosed, including input content, a disruption processor, and output content. The disruption processor inserts disruptive content to the input content creating output content that impedes the ability of optical recording dev...
05/15/2007
7203580Electrical control unit and control system comprising plural electrical control units
When ENG frames created in an ENG transceiver unit and ECT frames subjected to gateway processing in an ECT gateway processor are transmitted around the same time, a transmission mediating unit alternately transmits each of the ENG frames and the ECT frames. Therefo...
04/10/2007
7146008Conditional access television sound
A digitally encrypted audio signal may be transmitted with an analog television signal. Access to the analog television video signal may be controlled by using graphics overlay techniques. The use of digital encryption techniques on the audio channel prevents improp...
12/05/2006
7107383Method and system for multi-channel transfer of data and control information
A system and method for transferring information in a multi-channel, point-to-point environment are described. In one embodiment, a number of processing chips are connected to a bridge bus. A bridge is connected to the bridge bus and to a system bus. In addition, a ...
09/12/2006
7082198Data receiving method and data receiving unit therefor
A data receiving method and unit extracts required data from among received digital signal data, and uses a predetermined decoding key to decode the extracted data. In the method and unit, it is determined whether the decoded data is normal. If it is determined that...
07/25/2006
7030956Optical intensity modulation method and system, and optical state modulation apparatus
An optical intensity modulation having a periodicity in the temporal domain is applied on an optical state of an original display image, being displayed on a projection screen or a display screen, that takes into account a human temporal frequency contrast sensitivi...
04/18/2006
6993152Hiding geo-location data through arrangement of objects
The present invention provides steganographic-embedding techniques. In one implementation a digital watermark signal is mapped to a set of spatial positions. Physical message objects are positioned according to the set of spatial positions. The signal is provided on...
01/31/2006
6975746Integrating digital watermarks in multimedia content
A method for decoding auxiliary data from media signals in multimedia content decodes watermarks from different media signals and uses the watermarks to control processing of the multimedia content. A copy control method decodes a watermark from one of the media sig...
12/13/2005
6971012Motion picture electronic watermark system
To provide an electronic watermark method and system for which the detection reliability of embedded information does not depend on the strength of signals that are measured in frames. To achieve the above object, information is prepared for embedding as a bi...
11/29/2005
6956549LCD driver
An LCD driver compares an image signal with a count of a counter repeatedly counting a clock. Based on the result of the comparison, the LCD driver outputs pulses each having a duty factor in accord with the image signal. When the count is not between first and seco...
10/18/2005
6950532Visual copyright protection
A visual copyright protection system is disclosed, including input content, a disruption processor, and output content. The disruption processor inserts disruptive content to the input content creating output content that impedes the ability of optical recording dev...
09/27/2005
6944296Video bit scrambling
In some embodiments, the invention includes a method to bit scramble a digital video signal. The method includes receiving blocks of the digital video signal and scrambling the blocks of the digital video signal responsive to a remote computer number. The remote com...
09/13/2005
6771794Electronic watermark generating apparatus, electronic watermark generating method and memory medium therefor
In a situation where a data portion is considered as of higher importance in the course of preparation of original data, the designer is enabled to set the electronic watermark in a position that is judged appropriate by the designer. There are provided input means ...
08/03/2004
6510229Communication system with multicarrier telephony transport
A communication system for transferring digital data over a distribution network is described. The communication system includes an interface for receiving successive strings of digital data from a source, each string representing a certain number of bits...
01/21/2003
5848154Apparatus for managing software using quantity
A DES decrypting unit decrypts video data frames encrypted and compressed based on MPEG standards, when receiving them. The decrypted video data frames are expanded one by one in a MPEG expansion circuit. Each time the single frame is expanded, the MPEG e...
12/08/1998
5491748Enhanced security for a cable system
A cable television plant scrambling system incorporates video inversion with a pair of mode signals included in the vertical blanking interval of a scrambled television signal for identifying the proper mode for a video inverting/non-inverting amplifier a...
02/13/1996
5185794System and method for scrambling and/or descrambling a video signal
An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal on a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted v...
02/09/1993
5060262Video scrambling, audio masking and data transmission methods for wireless cable systems
Video scrambling is accomplished by attenuating the video carrier during the horizontal blanking interval and/or by omitting horizontal sync pulses, vertical serration pulses and equalizing pulses. The method of scrambling can be dynamically changed, but ...
10/22/1991
4759061Technique for toggling coding mode in a television signal encoder
A technique for toggling the coding mode in a television signal encoder comprises establishing a rectangular window defining a relatively small and substantially centrally located portion of the field image intervals of the television signal. The coding m...
07/19/1988
4742545Video picture signal scrambling system
A video picture signal scrambling system for subscription braodcast or cablecast television systems which can scramble video signals without adversely effecting pictures received at a subscriber's terminal. The system includes a detector for detecting the...
05/03/1988
4700388Apparatus for scrambling a television signal
An apparatus for scrambling or encoding a television signal by inverting the latter signal in accordance with a control signal having a predetermined code pattern comprises a detector circuit for detecting a change in a picture scene of the television sig...
10/13/1987
4679235Television signal transmission system
A television signal transmission system transmits a television signal having a polarity inverted portion in association with a scene change and a polarity inverted portion after a predetermined time interval independently of the scene change....
07/07/1987
4635113Apparatus for descrambling transmitted scrambled television signals
This invention relates to an apparatus for descrambling scrambled television signals including a scrambled video signal having a first scrambling pattern, a scrambled control signal having a second scrambling pattern, and descrambling signals....
01/06/1987
4628358Television signal encryption system with protected audio
An encrypted video distribution system includes a signal-originating head end for scrambling the audio portion of outgoing television program-bearing signals. In particular, the audio content of a television program alternately reverses polarity under con...
12/09/1986
4613902Method of broadcasting an encoded video signal and a receiving apparatus for decoding the signal
A video signal is encoded prior to broadcasting by inverting portions of the signal about an encoding axis at a predetermined reference level. To enable the reference level to be determined accurately after the received signal has been recorded and played...
09/23/1986
4599648Video signal transmission systems
A video signal transmission system wherein a television video signal is subjected to a waveform conversion in a video processing unit on a transmission side, then sent to a receiving side and restored in a restoring processing unit on the receiving side. ...
07/08/1986
4598318Video encryption system
An encrypted video distribution system includes a signal-originating head end for scrambling outgoing television program-bearing signals. In particular, the video content of selected lines is inverted about a reference voltage level, and the inversion ref...
07/01/1986
4471379Codified field polarity television system
There is disclosed herein a television system wherein television signals are scrambled or otherwise encoded at the transmitting facility and then unscrambled or decoded at the receiving facility, typically a home television subscriber. The television sign...
09/11/1984
4463376Television signal processing system for a wireless pay system
A television signal processing system characterized in that a level of at least a portion of a blanking interval of a coded television signal is shifted towards a white level and falling of the level shifting interval is shaped into a smooth waveform....
07/31/1984
4454543Dynamic video scrambling
A means for coding and decoding video signals by the application of one of a plurality of available scrambling signals includes means for comparing the brightness level during a predetermined time period of the video signal with the brightness level of th...
06/12/1984
4447828Phase change dynamic scrambling
A means for coding and decoding video signals by the application of one of a plurality of available scrambling signals, which scrambling signals have a common frequency but differ in phase, includes means for comparing the brightness level during a predet...
05/08/1984
4429331Video cipher processing system
A video cipher processing system comprising a detecting means for detecting average tone variation of TV video signals, an extracting means for extracting at random at least some of outputs from the detecting means as a result of the detection and a ciphe...
01/31/1984
4389671Digitally-controlled analog encrypton
An apparatus for scrambling a television signal in which horizontal lines of the transmitted television picture are selectively inverted in accordance with the state of a pseudorandom noise generator. In order to permit correction of the throughput gain a...
06/21/1983
4387393Signal unscrambler
A received video signal that has been inverted at the transmitter is reinverted by the use of low cost pin diodes to reverse the ground and signal lead connections to the primary winding of a transformer operating at RF frequencies....
06/07/1983
4369462Coding system for pay television
A coding system for use in a television system wherein at least a part of a television signal is inverted by an encoder at a broadcasting station, according to a code signal and the coded television signal is decoded by decoders of specific subscribers to...
01/18/1983
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