| Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274) |
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| 10/30/1991 | CN1055830A Adaptive-block-lenght, adaptive-transform, and adaptive-window transform coder, decoder, and encoder/decoder for high-quality audio |
| 10/29/1991 | US5062152 Pcm signal coding |
| 10/22/1991 | US5060268 Speech coding system and method |
| 10/22/1991 | US5059369 Refractory fiber module retainer system |
| 10/22/1991 | CA1291218C Analog/digital data storage system |
| 10/15/1991 | US5058165 Speech excitation source coder with coded amplitudes multiplied by factors dependent on pulse position |
| 10/15/1991 | US5058139 Notch filter for digital transmission system |
| 10/11/1991 | WO1991015926A1 Data alignment |
| 10/11/1991 | CA2079475A1 Data alignment |
| 10/08/1991 | US5056112 Interleaving in coded modulation for mobile radio |
| 10/01/1991 | US5053769 Fast response digital interface apparatus and method |
| 09/25/1991 | EP0447495A1 Low time-delay transform coder, decoder, and encoder/decoder for high-quality audio. |
| 09/24/1991 | US5051799 Digital output transducer |
| 09/11/1991 | EP0377687A4 Spectrally efficient method for communicating an information signal |
| 09/11/1991 | EP0371032A4 Protection of energy information in sub-band coding |
| 09/10/1991 | CA1288867C Adaptive differential pulse code modulation system |
| 09/04/1991 | EP0444993A1 Quantifying device with a variable digital coding flow |
| 09/03/1991 | WO1991013370A1 Time domain radio transmission system |
| 08/27/1991 | US5043932 Apparatus having modular interpolation architecture |
| 08/21/1991 | EP0442209A1 Fast response digital interface apparatus and method |
| 08/21/1991 | EP0441980A1 Time-division multiplex data relay exchange system |
| 08/21/1991 | EP0290581B1 Process for transmitting digital audio-signals |
| 08/21/1991 | CN1053982A Method and equipment for communication in underground channel |
| 08/21/1991 | CN1013633B Data compression using block list transform |
| 08/21/1991 | CN1013629B Degital-to digital code converter |
| 08/13/1991 | US5040217 Perceptual coding of audio signals |
| 08/13/1991 | CA2031881A1 Fast response digital interface apparatus and method |
| 08/06/1991 | US5038402 Apparatus and method for providing digital audio in the FM broadcast band |
| 08/06/1991 | CA1287417C Digital composite tone alerting |
| 08/06/1991 | CA1287376C Processor based linked compressor-expander telecommunications system |
| 07/24/1991 | EP0437861A2 Signal processing method and system. |
| 07/11/1991 | DE3943072A1 Ein interpolativer a/d umsetzer fuer bandpasssignale An interpolative a / d converter for bandpass signals |
| 07/09/1991 | US5031038 Process and device for the compression of image data by mathematical transformation effected at low cost, particularly for the transmission at a reduced rate of sequences of images |
| 07/03/1991 | EP0435507A2 Interleaving in coded modulation for mobile radio |
| 07/02/1991 | US5029162 Automatic gain control using root-mean-square circuitry in a digital domain conference bridge for a telephone network |
| 07/02/1991 | US5028999 Source encoder for video pictures having a quantizer whose stepsize is controlled in an incremental manner |
| 06/28/1991 | WO1991010283A1 Interpolative analog/digital converter for band-pass signals |
| 06/28/1991 | CA2072568A1 Interpolative analog/digital converter for band-pass signals |
| 06/26/1991 | EP0434004A1 Transmission system using parallel optic links to achieve enhanced dynamic range |
| 06/25/1991 | US5027209 Interpolation circuit for digital signal processor |
| 06/23/1991 | CA2025307A1 Fading bit error protection for digital cellular multi-pulse speech coder |
| 06/19/1991 | EP0433015A2 Variable bit rate coding system |
| 06/19/1991 | CN1012926B Method and arrangement for sigma delta converter for bandpass signals |
| 06/18/1991 | US5025404 Method of correcting erroneous values of samples of an equidistantly sampled signal and device for carrying out the method |
| 06/18/1991 | US5025375 Volume data transmission system |
| 06/18/1991 | US5025259 Analog-to-digital conversion system for an electronic control system of a motor vehicle |
| 06/18/1991 | CA1285071C Voice coding process and device for implementing said process |
| 06/12/1991 | EP0247081B1 Information transmission system, encoder and decoder |
| 06/12/1991 | CA2031801A1 Variable bit rate coding system |
| 06/11/1991 | US5023948 Polarization modulation of optical signals using birefringent medium |
| 06/11/1991 | US5023945 Transmission system using parallel optic links to achieve enhanced dynamic range |
| 05/28/1991 | US5020154 Transmission link |
| 05/28/1991 | US5020076 Hybrid modulation apparatus |
| 05/23/1991 | DE4036972A1 Digital audio signal receiver - includes circuit removing modulation noise by adjusting duty rate to provide original PCM signal |
| 05/21/1991 | US5018199 Code-conversion method and apparatus for analyzing and synthesizing human speech |
| 05/21/1991 | CA1284381C Optical disc recording method and apparatus for digital data having a plurality of transmission rates |
| 05/14/1991 | US5016279 Speech analyzing and synthesizing apparatus using reduced number of codes |
| 05/08/1991 | EP0426296A2 Apparatus having modular interpolation architecture |
| 05/08/1991 | EP0426295A2 Communications interface apparatus with decimating circuit |
| 05/08/1991 | EP0426294A2 Decimation-interpolation circuits |
| 05/07/1991 | US5014318 Apparatus for checking audio signal processing systems |
| 05/07/1991 | US5014304 Method of reconstructing an analog signal, particularly in digital telephony applications, and a circuit device implementing the method |
| 05/02/1991 | EP0425034A1 Method of transmitting a digital video signal and a receiver for use in the method |
| 04/24/1991 | EP0424161A2 System for coding and decoding an orthogonally transformed audio signal |
| 04/24/1991 | EP0424016A2 Perceptual coding of audio signals |
| 04/18/1991 | WO1991005412A1 Process for transmitting a signal |
| 04/17/1991 | EP0423050A1 Compression apparatus for transformed digital audio signal with adaptive quantization based on psycho-acoustic criterium |
| 04/17/1991 | EP0422802A1 Speech codec arrangement |
| 04/16/1991 | US5008672 Signal conversion apparatus which reduces quantization errors for telecommunications applications |
| 04/13/1991 | CA2026924A1 Speech codec arrangement |
| 04/10/1991 | EP0421515A1 Circuit for channel specific processing of a multichannel inputsignal |
| 04/09/1991 | US5007086 Apparatus and method for generating low level noise signals |
| 04/07/1991 | WO1991005411A1 Process for transmitting a signal |
| 03/27/1991 | EP0419337A1 Digital signal encoding method, encoder and decoder for carrying out the method, regeneration method and regenerator therefore |
| 03/27/1991 | EP0418958A2 Method and device for converting an analog input signal into control codes and for synthesizing a corresponding output signal under the control of those control codes |
| 03/27/1991 | EP0418396A1 Video/audio multiplex transmission system |
| 03/26/1991 | US5003559 Digital transmission system |
| 03/26/1991 | US5003554 Apparatus for the automatic in-circuit testing of coder/decoder telecommunications circuits and method therefor |
| 03/20/1991 | EP0417943A2 Cell transfer apparatus and method using a variable rate codec |
| 03/20/1991 | CN1050116A Digital transmission system using subband coding of digital signal |
| 03/20/1991 | CA2025483A1 Method for the coding of a digital signal, coder and decoder to implement this method, regeneration method and corresponding regenerator |
| 03/19/1991 | US5001758 Voice coding process and device for implementing said process |
| 03/13/1991 | EP0258341B1 Method for digital data transmission |
| 03/12/1991 | US4999626 Apparatus having a modular decimation architecture |
| 03/06/1991 | EP0414838A1 Process for transmitting a signal. |
| 03/05/1991 | WO1991003901A1 Time-division multiplex data relay exchange system |
| 02/26/1991 | US4996528 Use with an analog-digital-analog conversion device |
| 02/19/1991 | CA1280508C Method of and apparatus for correcting picture errors in dpcm signal reception |
| 02/07/1991 | DE3925305A1 Radio receiver for frequency or phase modulated signals - has analogue tuner with first dynamic compression characteristic and adjacent limiting characteristic |
| 02/06/1991 | EP0411829A2 Sample data transmission apparatus |
| 02/05/1991 | US4990914 Method and apparatus for interpolative A/D conversion |
| 01/30/1991 | EP0242258B1 Device for the execution of an algorithm (leroux-gueguen) for the coding of a signal by linear prediction |
| 01/30/1991 | CN1011467B Two-channel coding of digital signals |
| 01/29/1991 | US4989236 Transmission system for telephone communications or data transfer |
| 01/23/1991 | EP0397686A4 Apparatus for efficiently packing data in a buffer |
| 01/23/1991 | EP0145788B1 Method and apparatus for transmitting digital signal |
| 01/22/1991 | CA1279405C Data compression using block list transform |
| 01/16/1991 | EP0408287A2 Correction of systematic error in an oversampled analog-to-digital converter |
| 01/15/1991 | US4985923 High efficiency voice coding system |
| 01/09/1991 | CN1048473A Digital transmission system transmitter and receiver for use in transmission system, and record carrier obtained by means of transmitter in form of recording device |