| 6804452 |
Apparatus for generating recording signal including image data and copy condition information |
| Oct-12-2004 |
An apparatus for generating a recording signal by converting an image signal and outputting the generated recording signal to an external device is provided. The image signal included image data corresponding... |
| 6792538 |
Information generating method and apparatus, information reproducing method and apparatus, and information record medium |
| Sep-14-2004 |
An information generating apparatus for generating output information to be outputted is provided with: an error correcting code adding device for adding an error correction code, which is used for an... |
| 6792532 |
Method for encrypting data using IEEE 1394 serial bus network |
| Sep-14-2004 |
A data encryption method for an IEEE 1394 serial bus network, a data encryption method for an IEEE 1394 serial bus network, comprising the steps of requesting a private encryption at a data transmission... |
| 6789197 |
Apparatus for data copyright management system |
| Sep-7-2004 |
A data copyright management apparatus is used with a user terminal and comprises a CPU, a CPU bus, ROM, EEPROM, and RAM. The CPU, ROM, EPROM, and RAM are connected to the CPU bus, and a system bus of a... |
| 6775464 |
Video duplication control system, video playback device, video recording device, information superimposing and extracting device, and video recording medium |
| Aug-10-2004 |
A playback device 10 generates a PN code with a start timing based on a video sync signal, and generates a PN inverse code which has a reverse polarity to that of the PN code with a timing based on the... |
| 6772133 |
Information recording device and information reproducting device |
| Aug-3-2004 |
The information reproduction device for reproducing contents information based on license information added to the contents information and required for reproducing the contents information, includes a... |
| 6768942 |
Navigation system with decryption functions and secure geographic database |
| Jul-27-2004 |
A navigation system with decryption functions. The navigation system may receive from a portable data storage medium an encrypted authentication key, an encrypted first portion of a geographic database,... |
| 6765739 |
Method and apparatus for discouraging duplication of digital data |
| Jul-20-2004 |
A method and apparatus for creating a machine-readable medium such as a CD or a DVD disc is disclosed. The disc includes encoded copy protection data that, when decoded and re-encoded, produces a tracking... |
| 6754347 |
Input/output unit, input/output method, and receiving unit |
| Jun-22-2004 |
A switching portion of an IRD supplies a non-descrambled TS (transport stream) received from a front end portion or a descrambled TS received from a descrambler to a DVCR connected to an IEEE 1394 interface.... |
| 6725372 |
Digital watermarking |
| Apr-20-2004 |
The invention is a system for digital watermarking that operates on a conventional digital video stream to etch, on hand, and read, on the other hand, digital watermarks in the stream that do not visibly... |
| 6701062 |
Generational copy control of a video signal |
| Mar-2-2004 |
Method and apparatus for providing generational copy control of a video signal. A digital video signal contains content information, first supplemental information and second supplemental information.... |
| 6694023 |
Method and apparatus for protecting copyright of digital recording medium and copyright protected digital recording medium |
| Feb-17-2004 |
A digital recording medium for protecting a copyright includes a data recording region on at least a part of which information encrypted using a cryptosystem is recorded, and a copy disapproval region... |
| 6690880 |
Method and apparatus for copy protection detection in a video signal |
| Feb-10-2004 |
A method and apparatus for detecting copy protection included in an input video signal is described. Two types of copy protection are particularly addressed, including techniques that imbed copy protection... |
| 6690795 |
Multiple keys for decrypting data in restricted-access television system |
| Feb-10-2004 |
An encryption system for restricted-access television systems. Multiple decryption keys are used to decrypt encrypted material which is transmitted to customers of a restricted-access television system. |
| 6668068 |
Image attribute altering device and electronic watermark embedding device |
| Dec-23-2003 |
Image attribute detection means for detecting the attribute of an input image (attribute "A") and image attribute altering means for altering the image attribute in the input image on the basis of the... |
| 6636690 |
Digital signal storing apparatus and method, program recording medium, digital signal recording apparatus and method |
| Oct-21-2003 |
To prevent fraudulent innumerable copies of a copyrighted digital signal from appearing, a dedicated device driver reads the copyrighted digital signal from a card type recording medium, for example, a... |
| 6628891 |
Signal filtering mechanism for a multi-purpose digital television receiver |
| Sep-30-2003 |
Conditional access methods and apparatus are provided for use with digital television receivers and other digital broadband receivers. The methods and apparatus are capable of handling several different... |
| 6618335 |
Method and apparatus for recording and reproducing information on and from recording disc |
| Sep-9-2003 |
A recording disc has a lead-in area and a data area. A scrambled version of a SID code word is read out from the lead-in area of the disc. The SID code word represents a producer of the disc. The readout... |
| 6611599 |
Watermarking of digital object |
| Aug-26-2003 |
A technique for identifying digital object using a digital watermark. The technique includes the steps of encrypting a message derived from source data on the digital object, to obtain an encrypted message... |
| 6606450 |
Method and apparatus for processing video signals having associated access restriction data |
| Aug-12-2003 |
A method and apparatus that includes processing for restricting usage of video signals in accordance with associated access restriction data begins by detecting the presence of the associated access restriction... |
| 6594441 |
Method and apparatus for video tag signal recovery using various techniques to regenerate and re-record the tag signal |
| Jul-15-2003 |
In typical prior art generational copy protection processes, a video tag signal is added to a watermarked and/or copy protected video signal to prevent the production of unauthorized second generation... |
| 6591420 |
Remote control system for audio and video content |
| Jul-8-2003 |
A program distribution system is disclosed for the simultaneous release of a program at a plurality of locations. The locations may include local broadcasters, or even individual devices. A program is... |
| 6587948 |
Recording apparatus, recording medium, playback apparatus, recording method and playback method |
| Jul-1-2003 |
A recording method and a recording apparatus whereby digital data is recorded onto a disc as run-length limited code used for modulating marks or spaces on the disc and, at the same time, the recorded... |
| 6584199 |
Conditional access system and method thereof |
| Jun-24-2003 |
A conditional access system (CAS) for processing signals between a pay broadcast management system and a digital receiver includes a resource subscriber management system (RSMS) for predetermining time(s)... |
| 6577810 |
Method of restricting reproduction for information signal, information signal reproducing device, and information signal recording medium |
| Jun-10-2003 |
When a use permission information detecting unit detects restrictive use permission information, time shift start information, and time shift end information from a reproduced video signal S6 supplied... |
| 6574735 |
Information signal recording/reproducing system, information signal recording device, information signal reproducing device and information signal recording/reproducing process |
| Jun-3-2003 |
When digital image signals fed in through an input terminal are to be recorded on a disc, medium-related information, such as a serial number recorded in a table of contents of the disc, is read from the... |
| 6556679 |
Copy-guard system and information recording medium used in the same system |
| Apr-29-2003 |
In an embodiment, a copy-guard system is provided that includes a decoding section for decoding digital data, which is encoded and error-correction-coded, from an information recording medium in which... |
| 6539475 |
Method and system for protecting digital data from unauthorized copying |
| Mar-25-2003 |
Data is protected from unauthorized copying by rescrambling an unauthorized version of the data, but descrambling an authorized version of the data. This is done using a trigger signal. One property of... |
| 6539468 |
Data copying system, data copying method, data reading apparatus, data writing apparatus and data recording medium |
| Mar-25-2003 |
There is provided a copying system for copying information recorded on a first recording medium onto a second recording medium. The first recording medium is recorded with copying control information for... |
| 6526510 |
Signal reproducing method and apparatus, signal recording method and apparatus and signal recording system |
| Feb-25-2003 |
A signal reproducing method and apparatus in which the generation limitation information, such as a token or a ticket, contained in digital data, is recorded in analog signals. A reproducing device 20... |
| 6526220 |
Apparatus and method for TV broadcast copy protection |
| Feb-25-2003 |
Copy protecting television broadcast program signals which are received and recorded in a format that reserves recording areas for accessory information relating to the format and reserves other recording... |
| 6526146 |
Information recording system |
| Feb-25-2003 |
An optical disc recorder/reproducer, a personal computer, a television receiver, an IRD and so forth are connected mutually via a 1394 serial bus. When data transmitted from the personal computer to the... |
| 6523113 |
Method and apparatus for copy protection |
| Feb-18-2003 |
Copy protection techniques that utilize a watermark and a permission key are disclosed. The copy protection techniques can provide single-copy copy protection in addition to different levels of copy protection.... |
| 6516132 |
Method and apparatus for improving the effects of color burst modifications to a video signal |
| Feb-4-2003 |
In the known color stripe process for preventing recording of video signals, the color burst present on each line of active video is modified so that any subsequent video tape recording of the video signal... |
| 6507299 |
Embedding supplemental data in an information signal |
| Jan-14-2003 |
An arrangement for embedding supplemental data (e.g. a watermark W) in an information signal. In an embodiment of the invention, the arrangement comprises a conventional sigma-delta modulator for encoding... |
| 6490686 |
Method and apparatus for restricting privilege access to distributed content information |
| Dec-3-2002 |
A method and apparatus for restricting privileged access to distributed content information, (e.g., audio data stored on a compact disk, audiocassette, etc., and video and/or audio data stored on a DVD... |
| 6490355 |
Method and apparatus for use of a time-dependent watermark for the purpose of copy protection |
| Dec-3-2002 |
A copy protection system for protecting content wherein a ticket and a watermark are created, utilizing a first time reference (TD) and a one-way function, to indicate the copy protection status of the... |
| 6487363 |
Video duplication control signal, video playback device, video recording device, information superimposing and extracting device and video recording medium |
| Nov-26-2002 |
A playback device 10 generates a pseudo random noise (PN) code with a start timing based on a video sync signal, and generates a PN inverse code which has a reverse polarity to that of the PN code with... |
| 6480607 |
Encrypted data reproducing transmitting and processing method and apparatus with separately encrypted control data |
| Nov-12-2002 |
A data reproducing apparatus high in security against unauthorized duplication. A drive 20 includes a first CSS encoder 21 for performing first encryption processing on picture data etc reproduced from... |
| 6470137 |
Method and apparatus for superimposing a level changed spectrum spread additional information signal on a video signal |
| Oct-22-2002 |
Visual influence on the reproduced image by the spectrum spread additional information signal can be controlled on the reproduced image by sequentially changing the level of the spectrum spread additional... |
| 6453304 |
Digital information recording apparatus for recording digital information |
| Sep-17-2002 |
A digital information recording apparatus to record digital information to protect copyright of digital information that includes at least first digital information and first copy control information.... |
| 6449109 |
Recording and reproducing apparatus |
| Sep-10-2002 |
A recording and reproducing apparatus comprising a reproducing member for reproducing number-of-times-of-copy information and possible-number-of-times-of-copy information recorded on a recording medium,... |
| 6438692 |
Copy protection apparatus and information recording medium used in this copy protection apparatus |
| Aug-20-2002 |
This invention protects the unauthorized copy of multimedia data, recorded on an information recording medium, by using electronic watermark information and key information. The electronic watermark information... |
| 6438232 |
Method of securing the playback of a DVD-ROM via triggering data sent via a cable network |
| Aug-20-2002 |
A method and system for implementing the pay-per-view DVD-ROM system, whereby the enabling data provided to the DVD-player allowing the playback of the DVD-ROM video data is provided to the DVD-player... |
| 6433946 |
Information signal output control method, information signal duplication prevention method, information signal duplication prevention device, and information signal recording medium |
| Aug-13-2002 |
If only any one of a pair of an SS anti-duplication control signal S5 and copy guard signal S6 generated correlatively each other added on the video signal played back from the disk is detected, or if... |
| 6430291 |
Method and device for controlling information signal recording |
| Aug-6-2002 |
An anti-duplication control signal detection section detects an anti-duplication control signal added on a video signal S1 and supplies it to a system controller as a duplication prevention control information... |
| 6421497 |
Method for locating copy protection pulses within selected video lines of a video signal |
| Jul-16-2002 |
In a known copy protection process for preventing recording of video signals, pseudo sync and AGC pulses are present on predetermined lines within the blanking intervals of the video signal so that any... |
| 6411713 |
Method of adaptive control of the presence of a copy protection signal |
| Jun-25-2002 |
A method and apparatus for adaptively controlling the presence of copy protection signals in a video signal depends upon the scene content of the video signal during an upper portion of a display of the... |
| 6408076 |
Digital video broadcasting |
| Jun-18-2002 |
In order to descramble sections of scrambled data interleaved with sections of unscrambled data in a transport stream of broadcast video data, while leaving the sections with the original timing relationship... |
| 6398245 |
Key management system for digital content player |
| Jun-4-2002 |
A method of managing keys used by a digital content player on a computer system. According to the method, digital content data encrypted with a first encrypting key is decrypted using a first decrypting... |
