| Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274) |
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| 05/24/1989 | EP0317017A2 High definition television augmentation channel |
| 05/16/1989 | US4831663 Digital signal transmission/reception using differential polarization modulation/demondulation |
| 05/16/1989 | US4831636 Coding transmission equipment for carrying out coding with adaptive quantization |
| 05/16/1989 | US4831375 Two-wire communication apparatus |
| 05/10/1989 | EP0315377A2 A Loran-C navigation system |
| 05/10/1989 | EP0315372A2 Digital signal recording apparatus |
| 05/09/1989 | US4829522 Apparatus for decoding a digital signal |
| 05/09/1989 | US4829516 System structure recognition method for a multiloop transmission system |
| 05/09/1989 | US4829497 Optical disc recording method and apparatus for digital data having a plurality of transmission rates |
| 05/03/1989 | EP0185692B1 Process for reducing the noticeability of errors in a digital audio signal |
| 05/02/1989 | US4827339 Moving picture signal transmission system |
| 05/02/1989 | CA1253624A1 System structure recognition method for a multiloop transmission system |
| 04/26/1989 | EP0312672A1 Offset correction circuit for a sigma-delta coding device |
| 04/25/1989 | US4825451 Technique for transmission of voice communications and apparatus useful therein |
| 04/20/1989 | WO1989003574A1 Digital adaptive transform coding process |
| 04/18/1989 | CA1252842A1 Predictive communication system filtering arrangement |
| 04/12/1989 | EP0311494A1 Method and apparatus for digital transmission of speech between mobile stations |
| 04/11/1989 | US4821260 Transmission system |
| 04/11/1989 | US4821038 Method of and apparatus for Loran-C message communication with reduced skywave navigation location errors and the like |
| 04/06/1989 | WO1989003140A1 Process for transmitting audio signals |
| 04/05/1989 | EP0309974A1 Method for transmitting an audio signal |
| 04/04/1989 | US4819253 Method for determining PCM coding law |
| 04/04/1989 | US4819252 Sampled data subsampling apparatus |
| 03/29/1989 | EP0186763B1 Method of and device for speech signal coding and decoding by vector quantization techniques |
| 03/28/1989 | CA1251837A1 Error detection and concealment using predicted signal values |
| 03/21/1989 | US4815137 Voiceband signal classification |
| 03/21/1989 | US4815136 Voiceband signal classification |
| 03/15/1989 | EP0306713A2 Method and device for data processing |
| 03/14/1989 | US4813057 Time domain radio transmission system |
| 03/14/1989 | US4812846 Dither circuit using dither including signal component having frequency half of sampling frequency |
| 03/09/1989 | WO1989002195A1 Device for coding and decoding sound broadcast signals |
| 03/09/1989 | WO1989002148A1 Coded communications system |
| 03/07/1989 | CA1250945A1 System for detecting a transmission error |
| 03/01/1989 | EP0304836A2 Method and circuit concerning the resolution of digital signals |
| 02/28/1989 | US4809274 System for processing audio signals |
| 02/28/1989 | US4809271 Voice and data multiplexer system |
| 02/22/1989 | EP0303978A2 Method and circuit for enhancing the resolution of digital signals |
| 02/21/1989 | US4807298 Method of and system for digital signal coding by vector quantization |
| 02/21/1989 | US4807250 Coding device selectively connected to a transmission line |
| 02/21/1989 | US4807042 Method of image signal encoding by orthogonal transformation |
| 02/21/1989 | US4807032 Method of correcting image errors |
| 02/14/1989 | US4805193 Protection of energy information in sub-band coding |
| 02/14/1989 | US4805174 Error correcting coder/decoder |
| 02/09/1989 | WO1989001264A1 Analog/digital data storage system |
| 02/07/1989 | US4803727 Transmission system |
| 02/02/1989 | DE3723343A1 Method for transmitting an additional digital signal in an FM broadcast signal |
| 02/01/1989 | EP0301712A1 Data encoding |
| 02/01/1989 | CN1030832A Digital-to-digital code converter |
| 01/26/1989 | WO1989000796A1 Data encoding |
| 01/26/1989 | WO1989000790A1 Pcm signal coding |
| 01/25/1989 | EP0300771A1 PCM signal coding |
| 01/25/1989 | EP0300684A2 A digital-to-digital code converter |
| 01/25/1989 | CN1030678A High effective and reliable group transmission mode of informations |
| 01/24/1989 | US4800558 Telephone switching system frame sync generator |
| 01/24/1989 | US4800391 Method of and apparatus for message communication on Loran-C navigational signal broadcasts and the like with reduced navigation errors |
| 01/24/1989 | CA1249356A1 Sensor communication system |
| 01/11/1989 | EP0298546A1 System for the transmission of a series of digital samples coded by binary words with variable lengths |
| 01/10/1989 | US4797739 Method of compressing and reconstructing image signals by vector quantization |
| 01/04/1989 | EP0297403A2 Method for transmitting and/or recording and playing back digitized audio signals |
| 01/03/1989 | CA1248234A1 Frequency domain speech coding |
| 12/28/1988 | EP0296175A1 Method and installation for digital communication, particularly between and toward moving vehicles. |
| 12/15/1988 | WO1988010035A1 Protection of energy information in sub-band coding |
| 12/13/1988 | US4791670 Method of and device for speech signal coding and decoding by vector quantization techniques |
| 12/13/1988 | US4791660 Variable data compression announcement circuit |
| 12/13/1988 | US4791654 Resisting the effects of channel noise in digital transmission of information |
| 12/13/1988 | US4791485 System for detecting a transmission error |
| 12/07/1988 | EP0294012A2 Resisting the effects of channel noise in digital transmission of information |
| 12/07/1988 | EP0293533A2 Method and apparatus employing offset extraction and companding for digitally encoding and decoding high-fidelity audio signals |
| 12/07/1988 | EP0293489A1 Digital transmission system |
| 12/06/1988 | US4790015 Multirate digital transmission method and device for implementing said method |
| 12/06/1988 | US4789902 Image signal processing method |
| 12/06/1988 | CA1246197A1 Switching system having tone trunk |
| 11/29/1988 | US4788692 Adaptive differential pulse code modulation system |
| 11/23/1988 | CN87107425A Two-channel coding of digital signals |
| 11/17/1988 | EP0290581A1 Process for transmitting digital audio-signals. |
| 11/08/1988 | US4783792 Apparatus for transmitting digital signal |
| 11/02/1988 | EP0289080A1 System for subband coding of a digital audio signal |
| 11/01/1988 | US4782489 Method for decoding binary code words using estimated values |
| 11/01/1988 | US4782387 Two-channel coding of digital signals |
| 10/26/1988 | EP0287578A1 Digital coding process. |
| 10/19/1988 | EP0286727A2 Circuit for producing clock signal for reproducing PCM signal |
| 10/05/1988 | EP0285413A2 Sample rate converter |
| 10/05/1988 | EP0285276A2 Coding of acoustic waveforms |
| 10/05/1988 | EP0056402B1 Adaptive reconstruction of information signals in a plural channel system |
| 10/04/1988 | US4775986 DPCM decoding circuit for digital samples |
| 09/28/1988 | EP0284161A2 Source encoder for video pictures |
| 09/27/1988 | US4774686 Serial digital signal processing circuitry |
| 09/27/1988 | US4774496 Digital encoder and decoder synchronization in the presence of data dropouts |
| 09/21/1988 | EP0283167A2 Audio digital/analog encoding and decoding |
| 08/31/1988 | EP0279997A2 Apparatus and method for data transmission using two crossed polarisations of an electro-magnetic wave |
| 08/30/1988 | US4768203 Signal-to-noise ratio testing in adaptive differential pulse code modulation |
| 08/24/1988 | EP0279451A2 Speech coding transmission equipment |
| 08/23/1988 | CA1241116A1 Method of and device for speech signal coding and decoding by vector quantization techniques |
| 08/16/1988 | US4764769 For transmitting a channel of data |
| 08/16/1988 | CA1240798A1 Sampling rate converter for delta modulated signals |
| 08/10/1988 | EP0277613A2 Audio signal transmission method |
| 08/09/1988 | CA1240423A1 Bit compression multiplexing |
| 08/02/1988 | CA1240063A1 Digital companding circuit |
| 07/28/1988 | WO1988005621A1 Transmission system |
| 07/21/1988 | DE3800364A1 Method for recovering an analog signal from a digital signal, particularly for digital telephone devices, and circuit arrangement operating in accordance with this method |