Patents
Sitemap › H04 - Electric communication technique › H04N - Pictorial communication, e.g. television › H04N 21 - Selective content distribution, e.g. interactive television, vod [video on demand]
Patents for H04N 21 - Selective content distribution, e.g. interactive television, vod [video on demand] (56,445)
09/1991
09/18/1991EP0446612A2 Method for the preparation of several television signals for transmission purposes and applications
09/18/1991EP0446239A1 Digital to amplitude modulated analog converter
09/17/1991US5050188 Method and apparatus for transmitting coded information
09/05/1991WO1991013516A2 Method for coding video signals
09/05/1991WO1991013506A1 Hybrid analog/digital signal processing
09/03/1991US5045940 Video/audio transmission systsem and method
08/1991
08/07/1991CN1053722A Interrelational audio kinetic entertainment system
08/06/1991US5038211 Method and apparatus for transmitting and receiving television program information
07/1991
07/30/1991US5036537 Geographic black-out method for direct broadcast satellite system
07/30/1991US5036391 Synchronization method for the transmission, of an asynchronous channel, or a series of pictures encoded by means of a variable length code, and device for the implementation of this method
07/30/1991US5036389 Satellite controlled audience polling system
07/25/1991WO1991010490A1 Interrelational audio kinetic entertainment system
07/18/1991CA2030360A1 Interrelational audio kinetic entertainment system
07/11/1991WO1991010329A1 Apparatus for synchronizing main and auxiliary video signals
07/09/1991US5031046 Remote control device for a television set
07/03/1991EP0435344A2 Multi-media terminal apparatus
07/03/1991CN1052761A Apparatus for synchronizing main and auxiliary video signals
06/1991
06/30/1991WO1991010289A1 Transmitting encoded data on unreliable networks
06/23/1991WO1991010323A1 Media pipeline system
06/11/1991US5023721 TV of internal PiP type for receiving the character multibroadcasting
05/1991
05/28/1991US5019899 Electronic data encoding and recognition system
05/16/1991WO1991007050A1 Cable television decoder to television accessory interfacing
05/16/1991WO1991006912A1 Tv data capture device
05/15/1991EP0427601A1 Method for authenticating a microprocessor-card, and system for implementing it
05/02/1991EP0424648A2 Method, system and apparatus for providing demographically targeted television commercials
03/1991
03/13/1991CN1049928A 数字信号处理系统 Digital signal processing system
02/1991
02/21/1991WO1991002430A1 Digital signal processing system
02/19/1991US4995036 Multichannel data compressor
02/19/1991US4994908 Interactive room status/time information system
02/05/1991US4991011 Interactive television terminal with programmable background audio or video
02/05/1991CA1279924C Cryptographic system using interchangeable key blocks and selectable key fragments
01/1991
01/22/1991US4987486 Automatic interactive television terminal configuration
01/10/1991WO1991000670A1 Method and apparatus for transmitting and receiving television program information
01/01/1991US4982284 Video signal decoding system having a frame synchronizer function
01/01/1991US4982283 Line-sequential pyramid processing of a plurality of raster-scanned image variables
12/1990
12/27/1990WO1991000665A1 Video telephone employing pulse width modulation for data transmission
12/27/1990CA2063258A1 Video telephone employing pulse width modulation for data transmission
12/19/1990CN1047950A Interactive room status/time information system
12/13/1990WO1990015502A1 Method and apparatus for superimposed information upon video signals and the like
12/12/1990CN2067470U Protective device for tv set
12/11/1990CA1277764C System for enabling descrambling on a selective- subscription basis in a subscriber communication network
12/05/1990CN1047601A Terminal polling method
12/05/1990CN1047599A Interactive television terminal with programmable audio or video
12/05/1990CN1047598A Cable television transaction terminal
11/1990
11/28/1990CN1047428A Automatic interactive television terminal configuration
11/27/1990US4973977 Digital to amplitude modulated analog converter
11/01/1990WO1990013204A1 Interactive television terminal with programmable background audio or video
11/01/1990WO1990013194A1 Terminal polling method
11/01/1990WO1990013100A1 Interactive room status/time informaton system
11/01/1990WO1990013088A1 Cable television transaction terminal
10/1990
10/20/1990CA2014796A1 Interactive television terminal with programmable audio or video
10/20/1990CA2014795A1 Interactive room status/time information system
10/20/1990CA2014792A1 Terminal polling method
10/16/1990US4963995 Audio/video transceiver apparatus including compression means
09/1990
09/26/1990EP0389261A2 Compact-type device for reproducing data
07/1990
07/12/1990WO1990007847A1 Automatic interactive television terminal configuration
06/1990
06/14/1990WO1990006631A1 Digital to amplitude modulated analog converter
06/05/1990US4931865 Apparatus and methods for monitoring television viewers
05/1990
05/29/1990US4930160 Automatic censorship of video programs
05/29/1990US4930158 Selective video playing system
05/09/1990EP0367585A2 Electronic data encoding and recognition system
04/1990
04/05/1990WO1990003706A1 Television programme distribution system
02/1990
02/20/1990US4903126 Method and apparatus for tv broadcasting
01/1990
01/16/1990US4894789 TV data capture device
01/03/1990EP0108143B1 Method and system for remote reporting, particularly for pay television billing
07/1989
07/26/1989EP0324954A2 Method and device for the shared transmission of digitized television, sound and data signals
07/13/1989WO1989006471A1 Synchronization device and method for the transmission of a series of images coded by means of a variable length code
07/05/1989EP0323363A1 Method of synchronizing, for transmission, on an asynchronous channel, a sequence of pictures coded with a variable-length code, and device for carrying out this method
06/1989
06/13/1989CA1255822A1 Pcm frame synchronizing unit
05/1989
05/16/1989US4831439 Refresh system for digital signals with refresh cycle synchronization
05/09/1989US4829558 System and device for data transmission, and related method
05/09/1989US4829372 Presentation player
05/03/1989EP0314203A2 System for enabling descrambling on a selective-subscription basis in a subscriber communication network
03/1989
03/14/1989CA1251275A1 Meter for passively logging the presence and identity of tv viewers
03/01/1989CN1031458A Presentation player
02/1989
02/21/1989US4807023 Mapping method for impulse pay per view system
12/1988
12/27/1988US4794600 Apparatus for error correction of digital image data by means of image redundancy
12/20/1988US4792973 Selective enablement of descramblers
09/1988
09/27/1988US4774587 Still video transceiver processor
09/15/1988DE3707243A1 Method for digital transmission of television signals
08/1988
08/24/1988EP0279053A1 Method for the transmission and reproduction of sequences of television pictures
06/1988
06/14/1988US4751578 System for electronically controllably viewing on a television updateable television programming information
06/07/1988US4750213 Method and system for editing unwanted program material from broadcast signals
05/1988
05/31/1988US4748684 Fast tuning control for a television system
04/1988
04/26/1988US4740834 Video program distribution
04/19/1988US4739406 Method and apparatus for interacting with television images
03/1988
03/22/1988US4733301 Signal matching signal substitution
02/1988
02/02/1988US4723240 PCM-frame synchronizing unit
12/1987
12/08/1987US4712238 Selective-subscription descrambling
09/1987
09/15/1987US4694491 Cryptographic system using interchangeable key blocks and selectable key fragments
08/1987
08/06/1987DE3602825A1 Method and arrangement for synchronisation
03/1987
03/26/1987DE3533848A1 Method and circuit arrangement for synchronising asynchronous digital video signals
03/04/1987EP0212261A1 Broad-band distribution and communication system
02/1987
02/24/1987US4645459 Computer generated synthesized imagery
02/03/1987US4641253 Process for synchronizing computer video with independent audio
01/1987
01/27/1987US4639911 Head-end and receiver for a signal distribution system
12/1986
12/30/1986US4633297 Video system
12/30/1986EP0205863A1 Distribution system for broadband communications
12/30/1986CA1216056A1 Method and system for remote reporting, particularly for pay television billing
12/16/1986US4630108 Preprogrammed over-the-air marketing research system
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