| Patents for H04N 21 - Selective content distribution, e.g. interactive television, vod [video on demand] (56,445) |
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| 10/04/1995 | EP0675642A2 Electronic apparatus with functional information memory |
| 10/04/1995 | EP0674824A1 Television program delivery system |
| 10/04/1995 | CN1109695A Multimedia synchronization system |
| 10/03/1995 | US5455820 Output-buffer switch for asynchronous transfer mode |
| 10/03/1995 | US5455684 Apparatus and method for processing a variable-rate coded signal for recording to provide a high-speed search capability, apparatus and method for reproducing such processed signal, and recording including such processed signal |
| 09/28/1995 | WO1995026111A2 An encoder buffer having an effective size which varies automatically with the channel bit-rate |
| 09/28/1995 | WO1995026103A1 On-demand video server system |
| 09/28/1995 | WO1995022855A3 Apparatus and methods for improving timing recovery of a system clock |
| 09/27/1995 | EP0674414A2 Apparatus and computer-implemented process for providing real-time multimedia data transport in a distributed computing system |
| 09/27/1995 | EP0673583A1 Advanced set top terminal for cable television delivery systems |
| 09/27/1995 | EP0673582A1 Reprogrammable terminal for suggesting programs offered on a television program delivery system |
| 09/27/1995 | EP0673581A1 Set top terminal for cable television delivery systems |
| 09/27/1995 | EP0673580A1 An operation center for a television program packaging and delivery system |
| 09/27/1995 | EP0673579A1 Network controller for cable television delivery systems |
| 09/27/1995 | EP0673578A1 Apparatus and method for use in a digital cable headend for cable television delivery system |
| 09/27/1995 | CN1109241A 数据传输系统 The data transmission system |
| 09/20/1995 | EP0673034A2 Optical disk and method and apparatus for recording and then playing information back from that disk |
| 09/20/1995 | EP0672323A1 Auxiliary device control for a subscriber terminal |
| 09/19/1995 | US5452435 Synchronized clocks and media players |
| 09/19/1995 | US5452012 Image display apparatus |
| 09/19/1995 | US5452009 Digital transmission system with data rate optimized for noise in transmission medium |
| 09/13/1995 | EP0671102A1 Picture-in-picture tv with insertion of a mean only frame into a full size frame |
| 09/12/1995 | US5450392 Reduction of interchannel harmonic distortions in an analog and digital signal multiplex |
| 09/12/1995 | US5450123 Method to enhance voice communications using encoded one-way video signals under bi-directional user or network control for transmitting stored or real-time video or image information |
| 09/08/1995 | WO1995024098A1 Method of automatically programming a tuner and device for carrying it out |
| 09/06/1995 | EP0670652A1 Improved graphical user interface for interactive television and video on demand |
| 09/05/1995 | US5448568 System of transmitting an interactive TV signal |
| 08/31/1995 | WO1995023411A1 Method and device for recording data, data recording medium, and method and device for reproducing data |
| 08/30/1995 | EP0669587A2 Networked system for display of multimedia presentations |
| 08/29/1995 | US5446919 Communication system and method with demographically or psychographically defined audiences |
| 08/29/1995 | US5446726 Error detection and correction apparatus for an asynchronous transfer mode (ATM) network device |
| 08/29/1995 | US5446491 Multi-point video conference system wherein each terminal comprises a shared frame memory to store information from other terminals |
| 08/29/1995 | US5446490 Interactive television with tailored programming |
| 08/29/1995 | US5446489 Cable television billing method |
| 08/29/1995 | US5446488 Television programme distribution signal having the capability to selectively block non-programme material |
| 08/24/1995 | WO1995022855A2 Apparatus and methods for improving timing recovery of a system clock |
| 08/24/1995 | EP0679317A4 Broadcast channel substitution method and apparatus. |
| 08/22/1995 | US5444575 Method for recording digital data using a set of heads including a pair of co-located heads to record data at a rate lower than the full recording rate possible using the set of heads |
| 08/17/1995 | DE4403803A1 Transmission system for video and audio signals of wide spatial sepn. |
| 08/16/1995 | EP0667082A1 System and method for multiplexing a plurality of digital program services for transmission to remote locations |
| 08/16/1995 | EP0667063A1 Process for transmitting and/or storing digital signals from several channels. |
| 08/16/1995 | EP0667016A1 Player bus apparatus and method |
| 08/15/1995 | US5442398 Method and apparatus for transmitting a video signal, and apparatus for receiving a video signal |
| 08/15/1995 | US5442390 Video on demand with memory accessing and or like functions |
| 08/15/1995 | US5442389 Program server for interactive television system |
| 08/08/1995 | US5440632 Reprogrammable subscriber terminal |
| 08/08/1995 | US5440336 System and method for storing and forwarding audio and/or visual information on demand |
| 08/03/1995 | CA2114771A1 Method and apparatus for providing dual language captioning of a television program |
| 08/01/1995 | US5438369 Digital data interleaving system with improved error correctability for vertically correlated interference |
| 08/01/1995 | US5438355 Interactive system for processing viewer responses to television programming |
| 07/27/1995 | WO1995020294A1 Television signal activated interactive smart card system |
| 07/27/1995 | WO1995020293A1 Cable television billing method |
| 07/26/1995 | EP0664646A2 Digital video and audio signal recording and/or reproducing devices |
| 07/26/1995 | EP0664067A1 Method of and apparatus for channel mapping with relative service identification |
| 07/25/1995 | US5436676 Remote control unit code translation |
| 07/25/1995 | US5436675 Television receiver with UHF/VHF and broadcast satellite tuners, power switch state display antenna reception level display, and external decoder output and input terminals |
| 07/24/1995 | EP0746937A4 Interactive multimedia communication system |
| 07/18/1995 | US5434716 Digital video/audio recording and reproducing apparatus |
| 07/18/1995 | US5434678 Seamless transmission of non-sequential video segments |
| 07/18/1995 | US5434677 Digital video signal reproducing apparatus with high-speed play mode |
| 07/13/1995 | WO1995019092A1 Consumer interface for a digital television system |
| 07/13/1995 | WO1995019091A1 A digital television system channel guide having a limited lifetime |
| 07/13/1995 | WO1995017057A3 Local communication system including means for dividing messages into display field portions |
| 07/12/1995 | EP0662271A1 Apparatus and method for producing periodic synchronization references forming a synchronization signal |
| 07/06/1995 | WO1995018510A1 Data modulation arrangement for selectively distributing data |
| 07/06/1995 | WO1995018508A1 Circuit for the acquisition of a carrier signal by applying a substitute pilot to a synchronous demodulator |
| 07/06/1995 | WO1995018494A1 Data frame format for variable size data constellations |
| 07/04/1995 | US5430835 Method and means for computer sychronization of actions and sounds |
| 07/04/1995 | CA2005804C Automatic interactive television terminal configuration |
| 06/29/1995 | DE4344597A1 Drop-and-add multiplier for handling frequency multiplex signal |
| 06/28/1995 | EP0660609A2 Remote display of an image by transmitting compressed video frames representing background and overlay portions thereof |
| 06/28/1995 | EP0660603A2 Television channel memory device and channel programming method |
| 06/22/1995 | WO1995017057A2 Local communication system including means for dividing messages into display field portions |
| 06/14/1995 | EP0658055A1 Multimedia distribution over wide area networks |
| 06/14/1995 | EP0658019A1 Method and device for generation of clock signals |
| 06/13/1995 | US5425101 System and method for simultaneously authorizing multiple virtual channels |
| 06/13/1995 | US5424770 Method and apparatus for automatic insertion of a television signal from a remote source |
| 06/13/1995 | US5423555 Interactive television and video game system |
| 06/08/1995 | WO1995015656A1 Multi-service data receiver architecture |
| 06/08/1995 | WO1995015655A1 Multiplexing digital signals for transmission to remote locations |
| 06/08/1995 | WO1995015654A1 Transaction based interactive television system |
| 06/08/1995 | WO1995015653A1 Interactive television security through transaction time stamping |
| 06/08/1995 | WO1995015651A1 Data word indicator in a system for assembling transport data packets |
| 06/08/1995 | WO1995015647A1 System and method for providing compressed digital teletext services and teletext support services |
| 06/08/1995 | WO1995015632A1 System and method for simultaneously authorizing multiple virtual channels |
| 06/08/1995 | CA2177811A1 Multiplexing digital signals for transmission to remote locations |
| 06/08/1995 | CA2177735A1 System and method for providing compressed digital teletext services and teletext support services |
| 06/08/1995 | CA2177253A1 Multi-service data receiver architecture |
| 06/07/1995 | EP0656729A2 Method and apparatus for editing or mixing compressed pictures |
| 06/06/1995 | US5422674 Remote display of an image by transmitting compressed video frames representing background and overlay portions thereof |
| 06/06/1995 | CA1335837C System and device for data transmission, and related method |
| 05/30/1995 | US5421031 Program transmission optimisation |
| 05/30/1995 | US5420923 Addressed messaging in a cable television system |
| 05/30/1995 | US5420866 Methods for providing conditional access information to decoders in a packet-based multiplexed communications system |
| 05/30/1995 | US5420647 T.V. viewing and recording system |
| 05/30/1995 | US5420551 Circuit for broadband video transmission over unshielded twisted wire pairs |
| 05/27/1995 | CA2136560A1 Method and device for generation of clock signals |
| 05/23/1995 | US5418713 Apparatus and method for an on demand data delivery system for the preview, selection, retrieval and reproduction at a remote location of previously recorded or programmed materials |
| 05/23/1995 | US5418576 Television receiver with perceived contrast reduction in a predetermined area of a picture where text is superimposed |
| 05/23/1995 | US5418573 Apparatus and method for producing periodic synchronization references forming a synchronization signal |