Patents
Sitemap › H04 - Electric communication technique › H04H - Broadcast communication › H04H 20 - Arrangements for broadcast or for distribution combined with broadcast
Patents for H04H 20 - Arrangements for broadcast or for distribution combined with broadcast (21,050)
05/1986
05/13/1986US4589127 Independent sideband AM multiphonic system
04/1986
04/30/1986EP0179612A2 Cryptographic system for direct broadcast satellite network
04/29/1986US4586081 Method and apparatus for secure audio channel transmission in a CATV system
04/23/1986EP0178866A1 Image reception apparatus
04/16/1986EP0177512A1 Preprogrammed over-the-air marketing research system
04/15/1986US4583090 Data communication system
04/01/1986US4580284 Pilot tone cancelling circuit for AM stereo decoder
04/01/1986CA1202571A1 Triphonic sound system
03/1986
03/27/1986WO1986001962A1 Information display scheme for subscribers of a subscription television system
03/25/1986US4578807 FM stereo multiplex demodulator
03/19/1986EP0174636A2 Method for masking errors
03/18/1986CA1202085A1 Random frequency offsetting apparatus for multi- transmitter simulcast radio communications systems
02/1986
02/25/1986CA1201172A1 Distortion correcting am steroe with non-flat agc
02/19/1986EP0172095A1 Method and arrangement for transmitting coded information by radio channel in superposition on a traditional frequency modulation transmission
02/12/1986EP0170847A1 Method for the phase-locked transmission of a low-frequency modulation signal and circuit arrangement for performing this method
02/11/1986US4570265 Random frequency offsetting apparatus for multi-transmitter simulcast radio communications systems
02/04/1986US4569073 Asymmetrical sideband transmission
01/1986
01/28/1986US4567591 Digital audio satellite transmission system
01/15/1986EP0167850A2 Signal transmission system and method
01/15/1986EP0167773A1 Method for transmitting and receiving high-quality audio programmes and receiving arrangement
12/1985
12/19/1985WO1985005748A1 Compatible am broadcast/data transmission system
12/10/1985US4558464 Address-programmable CATV converter
11/1985
11/21/1985EP0161913A2 Method and apparatus for subscription control for television programming
11/05/1985CA1196387A1 Signal interference protection circuit for am stereo receiver
10/1985
10/29/1985US4550424 PM Decoder sample and hold circuit
10/23/1985EP0158633A1 Education utility
10/10/1985WO1985004543A1 Preprogrammed over-the-air marketing research system
10/08/1985CA1194933A1 Radio signal transmission system including a plurality of transmitters for transmitting a common signal
09/1985
09/24/1985CA1194168A1 System for communication by way of repeatedly transmitted messages, and stations for use in such a system
09/10/1985US4541095 System for communication by way of repeatedly transmitted messages, and stations for use in such a system
08/1985
08/29/1985WO1985003824A1 Fm subcarrier transmission system
08/28/1985EP0153239A1 Radiating system for broadcasting in road tunnels and powering equipment for this system
08/27/1985US4538176 Buffer memory dispersion type video/audio transmission system
08/21/1985EP0152341A1 Method for remote control of electrical equipment and corresponding receiver
08/21/1985EP0152173A1 Switch assembly and circuit
08/20/1985US4536885 Distortion correcting AM stereo receiver with non-flat AGC
08/06/1985US4534054 Signaling system for FM transmission systems
07/1985
07/24/1985EP0149536A2 Communications system
07/02/1985CA1189908A1 Multiple tone pilot signal system
06/1985
06/25/1985CA1189646A1 Audio distributing system
06/19/1985EP0144801A2 Digital signal transmitting system
05/1985
05/28/1985US4520498 AM Stereo modulator
05/28/1985CA1187977A1 Switching system
05/21/1985CA1187635A1 Community antenna television arrangement for the reception and distribution of tv-and digital audiosignals
05/15/1985EP0141565A2 Am stereo signal decoder
05/15/1985EP0141431A2 Digital signal transmitting and/or receiving system
05/14/1985US4517655 Multiplier circuit for multiplying an information signal by a periodic signal
05/14/1985US4517562 FM Communication system
05/08/1985EP0140593A2 Music delivery system
05/08/1985EP0140224A2 Digital signal transmission system
05/07/1985US4516269 Automatic equalization for a simulcast communication system
05/07/1985US4516257 Triphonic sound system
04/1985
04/30/1985CA1186427A1 Fm-broadcasting system with transmitter identification by means of a binary phase-modulated, differentially coded code signal
04/25/1985WO1985001854A1 Education utility
04/23/1985US4513415 Broadcast synchronization and supervision system
04/23/1985US4513315 Community antenna television arrangement for the reception and distribution of TV - and digital audio signals
04/09/1985US4510614 Predistorted AM stereo transmission
03/1985
03/27/1985EP0135192A2 Encoding of transmitted program material
03/19/1985US4506384 Synchronized, multitransmitter, single frequency paging system
03/19/1985CA1184255A1 Dividing circuit
03/12/1985US4504966 Stereo inhibitor for AM stereo receiver
03/05/1985US4503397 AM Stereo pilot signal detection circuitry
02/1985
02/12/1985US4499601 Method and apparatus for automatically detecting and playing desired audio segments over a broadcast receiver.
02/12/1985US4499568 Process for the teledistribution of recorded information and a system for performing this process
02/05/1985US4498170 Time divided digital signal transmission system
01/1985
01/29/1985CA1181816A1 In-band signalling system for fm transmission systems
01/08/1985US4493099 FM Broadcasting system with transmitter identification
12/1984
12/25/1984US4490837 AM Stereo to FM stereo converter
12/25/1984US4490830 Radio signal transmission system including a plurality of transmitters for transmitting a common signal
12/19/1984EP0128769A2 Address-programmable CATV converter
12/19/1984EP0128210A1 Method and apparatus for synchronizing radio transmitters for synchronous radio transmission.
12/19/1984EP0128209A1 Method of setting radio transmitters for synchronous radio transmission.
12/18/1984US4489431 Signal interference protection circuit for AM stereo receiver
11/1984
11/27/1984US4485483 FM Stereophonic system incorporating companding of difference signal
11/20/1984CA1178341A1 Circuit for processing angle modulated broadcast signals
11/20/1984CA1178340A1 Circuit for demodulating amplitude and angle modulated broadcast signals
11/06/1984US4481658 FM-broadcasting system with transmitter identification by binary phase-modulated, differentially coded code signal
10/1984
10/23/1984US4479233 Distortion correcting AM stereo receiver with non-flat AGC
10/23/1984CA1176709A1 Circuit for minimizing the effects of the level of received broadcast signals on separation in a stereophonic receiver
10/16/1984US4477924 AM Stereo detector
10/16/1984CA1176312A1 Tone detector circuit
10/03/1984EP0120685A2 Method of and apparatus for decoding scrambled video signals
10/02/1984US4475246 Simulcast same frequency repeater system
10/02/1984CA1175489A1 Receiver for am stereo signals having a circuit for reducing distortion due to overmodulation
09/1984
09/27/1984WO1984003807A1 Fm stereophonic radio broadcasting system having s channel companding
09/19/1984EP0118710A1 Synchronizing device for the useful signals of a common frequency broadcasting system
09/05/1984EP0117723A2 Radio communications systems
08/1984
08/22/1984EP0048729B1 Am stereophonic decoder
08/14/1984US4466116 Signal processor for AM stereophonic receiving apparatus
08/08/1984EP0067193B1 Teledistribution system
08/08/1984EP0032947B1 Tangent function generator for am stereo
07/1984
07/17/1984CA1171139A1 Dual mode tone detector circuit
07/04/1984EP0112409A1 Broadcasting method for a mobile radio network
06/1984
06/21/1984WO1984002437A1 Method and apparatus for synchronizing radio transmitters for synchronous radio transmission
06/21/1984WO1984002436A1 Method of setting radio transmitters for synchronous radio transmission
06/19/1984US4455570 CATV System
06/13/1984EP0110009A1 Common wave FM radio system
05/1984
05/29/1984US4451927 Separation correction method and apparatus for plural channel transmission system
05/15/1984US4449249 Televison programming information system
05/08/1984CA1167110A1 Multiple system am stereo receiver and pilot signal detector
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