| Patents for H04H 20 - Arrangements for broadcast or for distribution combined with broadcast (21,050) |
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| 06/09/1998 | US5764763 Apparatus and methods for including codes in audio signals and decoding |
| 06/09/1998 | US5764706 AM compatible digital waveform frame timing recovery and frame synchronous power measurement |
| 06/09/1998 | US5764275 Method for preventing cheating on an interactive presentation system |
| 06/04/1998 | WO1998024201A1 Method and device for mixed analog and digital broadcast of a radio programme broadcast by the same transmitter |
| 06/03/1998 | EP0845873A1 Method of switching a broadcast receiver to alternative frequencies during pauses in the broadcast signal |
| 06/02/1998 | US5761606 Media online services access via address embedded in video or audio program |
| 06/02/1998 | US5759101 Central and remote evaluation of responses of participatory broadcast audience with automatic crediting and couponing |
| 05/28/1998 | WO1998023050A2 Simultaneous over the air data download to multiple receivers |
| 05/27/1998 | EP0581929B1 Method of inputting alphanumeric data |
| 05/26/1998 | US5758262 Apparatus for converting TV audio signals for reception on a nearby AM and/or FM receiver |
| 05/26/1998 | US5757854 In-band on-channel digital broadcasting |
| 05/22/1998 | WO1998021837A1 Method and apparatus for reducing phase cancellation in a simulcast paging system |
| 05/20/1998 | EP0843432A2 Interactive system for collecting responses from a plurality of remote units |
| 05/20/1998 | EP0843431A2 Discriminating apparatus for digital audio broadcasting |
| 05/20/1998 | EP0843430A2 Technique for simultaneous transmission of analog frequency-modulated and digitally modulated signals using postcanceling method |
| 05/20/1998 | EP0843429A2 Broadcast receiver for receiving digital audio broadcast comprising supplementary data |
| 05/20/1998 | EP0843428A2 Communication system using a base station and a mobile station using COFDM transmission, method for setting up a radio-link and mobile station using the method |
| 05/20/1998 | EP0842565A1 Low power data receiver combined with audio receiver |
| 05/20/1998 | CN1182488A Improved periodic wireless data broadcast |
| 05/20/1998 | CN1182329A Digital broadcasting system using virtual channels |
| 05/20/1998 | CN1182328A Digital broadcasting system, digital broadcaster and receiver in digital broadcast thereof |
| 05/20/1998 | CN1182327A Information providing apparatus and method, display controlling apparatus and method, information providing system, as well as transmission medium |
| 05/19/1998 | US5754946 Nationwide communication system |
| 05/19/1998 | US5754501 Information transmission method and apparatus and information receiving method and apparatus |
| 05/14/1998 | WO1998020676A1 System and method for estimating characteristics of broadcast radio audiences |
| 05/14/1998 | WO1998020635A2 A radio receiver for receiving a main radio broadcast signal and a monolythic integrated circuit for use in such radio receiver |
| 05/14/1998 | WO1998020630A1 Direct satellite direct broadcast system |
| 05/14/1998 | WO1998020619A1 Apparatus and method for dynamically selecting a transmitter for directed message delivery |
| 05/14/1998 | DE19645867A1 Multiple channel sound transmission method |
| 05/14/1998 | CA2270134A1 Digital satellite direct broadcast system |
| 05/13/1998 | EP0841765A2 Method for determining the location of transmitters in digital broadcast systems |
| 05/13/1998 | CA2220647A1 Discriminating apparatus for digital audio broadcasting |
| 05/12/1998 | US5752178 Waveform identity discriminating circuit |
| 05/12/1998 | US5752177 Radio receiver, in particular a vehicle radio receiver |
| 05/12/1998 | US5751806 Audio information dissemination using various transmission modes |
| 05/12/1998 | US5751774 Transmission system for digital audio broadcasting |
| 05/12/1998 | US5751707 AIN interaction through wireless digital video network |
| 05/12/1998 | US5751693 Cellular digital signaling |
| 05/12/1998 | US5751336 Permutation based pyramid block transmission scheme for broadcasting in video-on-demand storage systems |
| 05/12/1998 | US5751335 Viewing restricting method and viewing restricting apparatus |
| 05/12/1998 | CA2097805C Simulcast scheduler |
| 05/07/1998 | WO1998019407A2 Method & apparatus for decoding multi-channel audio data |
| 05/06/1998 | EP0840270A2 Car navigation system with FM multi-broadcast signal receiving function |
| 05/06/1998 | CA2220241A1 A procedure for determining the locations of transmitters |
| 05/05/1998 | US5749050 Automatic emergency alarm reception apparatus using specific frequency |
| 05/05/1998 | US5749043 System and method for estimating characteristics of broadcast radio audiences |
| 05/05/1998 | US5748686 System and method producing improved frame synchronization in a digital communication system |
| 05/05/1998 | US5748348 Optical communication system for cable-television signals and for subscriber-assigned signals |
| 05/05/1998 | US5748107 Method and apparatus for locating an available parking facility |
| 05/05/1998 | US5747888 Back up system for the supply of voltage in television cable systems |
| 05/01/1998 | CA2189413A1 Rf car counting system and method therefor |
| 04/30/1998 | WO1998018295A1 Triggering a measurement process for evaluating the quality of audio and/or speech signals |
| 04/30/1998 | WO1998018230A2 Audio decoder with an adaptive frequency domain downmixer |
| 04/30/1998 | WO1998018229A1 Data processing method of fm multiplex broadcasting receiver |
| 04/30/1998 | WO1998018228A2 Method of receiving messages, and electrical appliance for implementing the method |
| 04/29/1998 | EP0838951A2 Program information broadcasting system broadcasting device, and receiving terminal unit |
| 04/29/1998 | EP0838915A2 Digital broadcasting system using virtual channels |
| 04/29/1998 | EP0838108A1 Process for transmitting messages by digital sound broadcasting and receiver for carrying out this process |
| 04/28/1998 | US5745777 Analyzer for frequency modulated signals |
| 04/28/1998 | US5745525 Method and system for simultaneously broadcasting and receiving digital and analog signals |
| 04/28/1998 | US5745503 Error correction decoder that operates in either ARDS system or a RBDS system |
| 04/28/1998 | US5745481 Message system and method for efficient multi-frequency roaming |
| 04/28/1998 | US5745159 Audio and video distribution system |
| 04/28/1998 | CA2100342C Am-fm combined stereo receiver |
| 04/23/1998 | WO1998017062A1 Level control for a broadband distribution system |
| 04/23/1998 | WO1998017023A2 Method of determining receiver locations in a common wave network |
| 04/23/1998 | WO1998007485A3 Interactive broadcasting systems |
| 04/23/1998 | DE19730716A1 Triggerung eines Meßverfahrens zur Qualitätsbeurteilung von Audio- und/oder Sprachsignalen Triggering a measurement method for assessing the quality of audio and / or voice signals |
| 04/23/1998 | DE19642633A1 Verfahren zur Bestimmung von Empfängerstandorten in einem Gleichwellennetz Method for determining receiver locations in a single frequency network |
| 04/23/1998 | DE19640735A1 Telematikgerät für ein Kraftfahrzeug Telematics appliance for a motor vehicle |
| 04/22/1998 | EP0837574A1 Method for selecting channels in a RDS receiver |
| 04/22/1998 | EP0837433A2 Method for reconstructing a message from stored texts, where the message is transmitted as digital code |
| 04/22/1998 | EP0836771A1 Broadcasting system |
| 04/22/1998 | CN1179655A Broadcasting system and information broadcast receiving terminal apparatus used therein |
| 04/21/1998 | USRE35774 Remote link adapter for use in TV broadcast data transmission system |
| 04/21/1998 | US5742907 Automatic clear voice and land-line backup alignment for simulcast system |
| 04/21/1998 | US5742893 Music-playing system for a motor vehicle |
| 04/21/1998 | US5742638 Spread-spectrum data publishing system |
| 04/21/1998 | US5742414 Multiplicity of services via a wavelength division router |
| 04/16/1998 | WO1998016028A1 Interactive system for a closed cable network that includes high speed access to an on-line service and the internet |
| 04/16/1998 | WO1998015887A2 Aggregate information production and display system |
| 04/16/1998 | DE19641772A1 Electronic speech recording and reproduction for radio traffic report message |
| 04/16/1998 | CA2268303A1 Aggregate information production and display system |
| 04/15/1998 | EP0836321A2 Apparatus and methods for information providing, display controlling, and transmission media |
| 04/15/1998 | EP0836304A2 Tracking of sampling frequency in a DAB receiver |
| 04/15/1998 | EP0836292A2 Method, means and datacarrier for selective display of digitally coded messages received with a radio broadcast, according to the location of the receiver |
| 04/15/1998 | EP0835587A1 Method and apparatus for combatting ingress and multipath in a catv return channel |
| 04/15/1998 | EP0835565A1 Group modulator for a broadband communications system |
| 04/15/1998 | EP0835564A1 Method and arrangement for the transmitter-related detection of listener-related data |
| 04/15/1998 | EP0835563A2 System for coupling telephony signals transmitted through a broadband communications network to a telephony network interface |
| 04/15/1998 | EP0835562A1 Paging service using broadcasting |
| 04/15/1998 | EP0835561A1 Modulation method and circuit arrangement for the transmission of data signals |
| 04/15/1998 | EP0478615B2 Polyphonic coding |
| 04/15/1998 | CN1179252A Channel quality management in a cable telephony system |
| 04/15/1998 | CN1179037A Communication method, emission device, emission method, receiving device and receiving method |
| 04/14/1998 | US5740519 Method for the time-correlated transmission of a control signal and a radio program signal |
| 04/14/1998 | US5739869 Electronic libretto display apparatus and method |
| 04/14/1998 | US5739595 Apparatus and methods for generating an AC power signal for cable tv distribution systems |
| 04/14/1998 | CA2087064C Radio paging system having a plurality of transmitter stations |
| 04/14/1998 | CA2069927C Communications system |