| Patents for H04N 21 - Selective content distribution, e.g. interactive television, vod [video on demand] (56,445) |
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| 01/15/1997 | EP0753235A1 Buffer management in variable bit-rate compression systems |
| 01/15/1997 | CN1140381A Method and apparatus for operating transport packet stream encoder for data representing plurality of component signals |
| 01/14/1997 | US5594859 Graphical user interface for video teleconferencing |
| 01/14/1997 | US5594794 For providing video services to consumers via an information network |
| 01/14/1997 | US5594509 Method and apparatus for audio-visual interface for the display of multiple levels of information on a display |
| 01/14/1997 | US5594493 Television signal activated interactive smart card system |
| 01/14/1997 | US5594492 Method and apparatus for rapid channel selection |
| 01/14/1997 | US5594491 Near-video-on-demand digital video distribution system utilizing asymmetric digital subscriber lines |
| 01/11/1997 | CA2180752A1 Service for transmitting a video film |
| 01/09/1997 | WO1997001245A1 A three-dimensional (3d) video presentation system providing interactive 3d presentation with personalized audio responses for multiple viewers |
| 01/09/1997 | WO1997001236A1 Hybrid fiber coax communications system |
| 01/08/1997 | EP0752786A1 Apparatus and method for authenticating transmitted applications in an interactive information system |
| 01/08/1997 | EP0752705A2 Method of and apparatus for recording information on record medium, and apparatus for reproducing the same |
| 01/08/1997 | EP0752678A2 Apparatus and method for executing game programs having advertisements therein |
| 01/08/1997 | CN1033783C Apparatus for synchronizing main and uaxiliary video signals |
| 01/07/1997 | US5592551 Method and apparatus for providing interactive electronic programming guide |
| 01/07/1997 | US5592450 Method for reproducing compressed information data from a disk using a spatial frequency less than the track pitch |
| 01/03/1997 | WO1997000577A1 Data communication device |
| 01/02/1997 | EP0751655A2 Multimedia transmission system |
| 01/02/1997 | EP0751640A2 Method for meging supplementary broadcast programmes into a main broadcast programme |
| 01/02/1997 | DE19626064A1 Device for correcting faults in monitoring block for master position in optical TV cable |
| 01/01/1997 | CN1139507A Circuit for the acquisition of a carrier signal by applying a substitute pilot to a synchronous demodulator |
| 12/31/1996 | US5590202 Countdown system for conditional access module |
| 12/31/1996 | US5589945 Method of retrieving video segments |
| 12/31/1996 | US5589892 Electronic television program guide schedule system and method with data feed access |
| 12/27/1996 | WO1996042169A1 Video decoder with dedicated mpeg processor |
| 12/27/1996 | WO1996042151A2 Steganographic method and device |
| 12/25/1996 | CN1138802A Data receiving-processing apparatus and method and broadcasting method |
| 12/25/1996 | CN1138795A Signal processing apparatus and method |
| 12/24/1996 | US5588029 MPEG audio synchronization system using subframe skip and repeat |
| 12/24/1996 | US5588025 Single oscillator compressed digital information receiver |
| 12/19/1996 | WO1996041478A1 Electronic television program guide schedule system and method with data feed access |
| 12/19/1996 | WO1996041471A1 Electronic program guide schedule localization system and method |
| 12/19/1996 | WO1996041470A1 Intelligent memory management system and method |
| 12/19/1996 | WO1996041468A1 Method and apparatus for copy protection for various recording media using a video finger print |
| 12/19/1996 | WO1996041438A1 Encoder apparatus and decoder apparatus for a television signal |
| 12/19/1996 | WO1996041423A1 Compression of an electronic programming guide |
| 12/19/1996 | WO1996041285A1 System and method for delivery of video data over a computer network |
| 12/19/1996 | CA2228607A1 System and method for delivery of video data over a computer network |
| 12/19/1996 | CA2222293A1 Compression of an electronic programming guide |
| 12/18/1996 | EP0749240A1 Digital video signal multiplex transmission system |
| 12/18/1996 | EP0748567A1 Buffering for digital video signal encoders using joint bit-rate control |
| 12/18/1996 | EP0748543A1 Video distribution network |
| 12/17/1996 | US5586121 Asymmetric hybrid access system and method |
| 12/17/1996 | US5585858 Simulcast of interactive signals with a conventional video signal |
| 12/17/1996 | US5585838 Program time guide |
| 12/11/1996 | EP0748124A2 Signal processing apparatus and method |
| 12/11/1996 | EP0748123A2 Multimedia server system and method for communicating multimedia information |
| 12/11/1996 | EP0748122A2 Multimedia control system and method for controlling multimedia program presentation |
| 12/11/1996 | EP0748121A2 Multimedia direct access storage device and formatting method |
| 12/11/1996 | EP0746944A1 Multiplexing digital signals for transmission to remote locations |
| 12/11/1996 | EP0746943A1 Multi-service data receiver architecture |
| 12/11/1996 | EP0746941A1 Interactive television security through transaction time stamping |
| 12/11/1996 | EP0746937A1 Interactive multimedia communication system |
| 12/11/1996 | CN1137723A Illegal view and copy protection method in digital video system and controlling method thereof |
| 12/10/1996 | US5583937 Method for providing video programming nearly on demand |
| 12/10/1996 | US5583922 Telecommunication system for automatic switching between voice and visual data communications using forms |
| 12/10/1996 | US5583889 Data receiver |
| 12/10/1996 | US5583863 Full service network using asynchronous transfer mode multiplexing |
| 12/10/1996 | US5583576 Rating-dependent parental lock-out for television reception |
| 12/10/1996 | US5583569 Video camera having asynchronous digital output including header data |
| 12/10/1996 | US5583562 System and method for transmitting a plurality of digital services including imaging services |
| 12/10/1996 | US5583560 Method and apparatus for audio-visual interface for the selective display of listing information on a display |
| 12/10/1996 | US5583491 Method for displaying state of remote controller battery on a television set |
| 12/08/1996 | CA2170469A1 Signal processing apparatus and method |
| 12/05/1996 | WO1996038985A1 Interactive television system for processing viewer responses |
| 12/04/1996 | EP0746158A2 Scalable interactive multimedia server system |
| 12/04/1996 | EP0746126A2 System for data copyright management using key distribution |
| 12/04/1996 | EP0746119A2 Satellite communications system for transmitting information from an information centre to a satellite receiving terminal with identifier allocated to information |
| 12/04/1996 | EP0745307A1 Subtitling transmission system |
| 12/04/1996 | EP0745295A1 Multimedia multiplexing device and method using dynamic packet segmentation |
| 12/04/1996 | CN1137147A Recording medium, recording apparatus and method, and apparatus and method reproducing |
| 12/03/1996 | US5581784 Method for performing I/O's in a storage system to maintain the continuity of a plurality of video streams |
| 12/03/1996 | US5581706 Method forming an audio/video interactive data signal |
| 12/03/1996 | US5581368 Data-reducing coding method for transmitting information from a transmitter to a receiver |
| 11/28/1996 | WO1997037490A1 Bookmarking television program and channel selections |
| 11/28/1996 | WO1996038002A1 Asymmetric data communications system |
| 11/28/1996 | WO1996037999A1 Logical and composite channel mapping in an mpeg network |
| 11/28/1996 | WO1996037996A1 Improvements in receivers for television signals |
| 11/28/1996 | CA2778121A1 Asymmetric data communications system permitting subscriber interaction |
| 11/27/1996 | EP0744868A2 Method and apparatus for guaranteeing average case disk transfer bandwith and seek time for a video server |
| 11/27/1996 | EP0569350B1 Television programme distribution system |
| 11/26/1996 | US5579523 Method for controlled locking/unlocking of a system using a locking mode flag during an interrupt routine |
| 11/26/1996 | US5579317 In an audio and video signal transmission system |
| 11/26/1996 | US5579183 Recording and reproducing an MPEG information signal on/from a record carrier |
| 11/26/1996 | US5579143 Optical system with tunable in-fiber gratings |
| 11/26/1996 | US5579061 Transmitter for transmitting tuning data in a television signal and receiver for receiving same |
| 11/21/1996 | WO1996037075A1 Compressed digital-data interactive program system |
| 11/20/1996 | EP0743796A2 An easily expandable transport stream encoder |
| 11/20/1996 | EP0743795A2 Transport packet stream encoder and method for operating the same |
| 11/20/1996 | EP0742985A1 Method and system for scheduling the transfer of data sequences utilizing an anti-clustering scheduling algorithm |
| 11/20/1996 | CN1136257A Data multiplexer, data multiplexing method, data recording medium, data recorder, data demultiplexer and data demultiplexing method |
| 11/20/1996 | CN1136202A Recording medium and apparatus for protecting copyrighted digital data |
| 11/19/1996 | US5577072 Timing phase detector and timing recovery using the same |
| 11/19/1996 | US5576835 Method for run-length coding for shortening transmission time |
| 11/19/1996 | CA2036205C Program monitoring unit |
| 11/16/1996 | CA2618611A1 Serving signals |
| 11/16/1996 | CA2618308A1 Serving signals |
| 11/16/1996 | CA2614843A1 Serving signals |
| 11/16/1996 | CA2614583A1 Serving signals |