| Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274) |
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| 09/29/1987 | CA1227574A1 Differential data coding and decoding process and system restricting propagation of transmission errors |
| 09/23/1987 | EP0238300A2 Serial digital signal processing circuitry |
| 09/23/1987 | EP0238254A2 Data compression using block list transform |
| 09/23/1987 | EP0238194A2 Methods of and apparatus for recording signals on a disc-shaped recording medium |
| 09/23/1987 | EP0237928A2 Method for correcting blockwise transmitted discrete values |
| 09/16/1987 | EP0236627A2 Duplex microphone communication system |
| 09/16/1987 | EP0236445A1 Capacity expander for telephone line |
| 09/15/1987 | US4694336 Digital data transmission method |
| 09/09/1987 | EP0236009A2 Coding digital data |
| 09/09/1987 | EP0235264A1 Digital radio frequency receiver |
| 09/09/1987 | CN86107928A Digital companding circuit |
| 09/02/1987 | EP0234666A2 Digital-to-analog converter circuit |
| 09/02/1987 | EP0234640A1 DPCM decoding circuit |
| 09/02/1987 | EP0234354A2 Apparatus for decoding a digital signal |
| 09/01/1987 | US4691349 Duplex microphone communication system |
| 08/27/1987 | WO1987005180A1 System for transmitting animation image signals |
| 08/27/1987 | WO1987005178A1 Method for digital data transmission |
| 08/25/1987 | US4689759 Process and installation for the analysis and retrieval of a sampling and interpolation signal |
| 08/18/1987 | US4688224 Method of and device for correcting burst errors on low bit-rate coded speech signals transmitted on radio-communication channels |
| 08/18/1987 | CA1225745A1 Method and system for analysing and reproducing signals by means of sampling and interpolation |
| 08/18/1987 | CA1225739A1 Non-linear emphasis circuit |
| 08/18/1987 | CA1225737A1 Method of and apparatus for improving television picture quality by activity-controlled dpcm-coding |
| 08/13/1987 | DE3603977A1 Method for digital transmission of phase-modulated analog signals |
| 08/11/1987 | US4686625 Method and apparatus for generating a display of well logging measurements |
| 08/05/1987 | EP0231020A2 Method of image signal encoding by orthogonal transformation |
| 08/04/1987 | US4685115 Apparatus for transmitting digital signals |
| 07/28/1987 | CA1224877A1 Double integration, delta-sigma, analog-digital coder |
| 07/21/1987 | US4681111 Analog and digital telemetry system for an implantable device |
| 07/21/1987 | CA1224571A1 Method of correcting erroneous values of samples of an equidistantly sampled signal an device for carrying out the method |
| 07/15/1987 | EP0228696A2 ADPCM coder-decoder including partial band energy transition detection |
| 07/14/1987 | US4680797 Secure digital speech communication |
| 07/14/1987 | US4680774 Method and circuit for suppression of quantitizing noise ambiguities |
| 07/14/1987 | US4680758 Switching system having tone trunk |
| 07/14/1987 | US4680751 Polarized carrier modulation |
| 07/14/1987 | US4680749 Duplex radio transceiver having improved data/tone and audio modulation architecture |
| 07/09/1987 | EP0216903A4 Telemetry system for an implantable device. |
| 07/08/1987 | EP0227773A1 Digital information transmission system and method |
| 07/07/1987 | CA1223965A1 High speed data compression and decompression apparatus and method |
| 07/02/1987 | DE3545341A1 System for wireless transmission of optical and/or sound signals |
| 07/01/1987 | EP0227473A2 Error correcting coder/decoder |
| 06/30/1987 | US4677671 Method and device for coding a voice signal |
| 06/30/1987 | US4677480 System for detecting a transmission error |
| 06/30/1987 | US4677423 ADPCM coder-decoder including partial band energy transition detection |
| 06/24/1987 | EP0225968A2 Quasi-analog reconstruction of an amplitude and frequency varying analog input signal |
| 06/23/1987 | US4675733 Bandwidth compression system |
| 06/16/1987 | US4673916 Method and system for decoding a digital signal using a variable frequency low-pass filter |
| 06/16/1987 | CA1223073A1 Digital speech coder with baseband residual coding |
| 06/09/1987 | US4672670 Apparatus and methods for coding, decoding, analyzing and synthesizing a signal |
| 06/09/1987 | US4672441 Method and apparatus for picture data reduction for digital video signals |
| 06/02/1987 | CA1222571A1 Adaptive predictive code conversion method of interrupting prediction and an encoder and a decoder for the method |
| 06/02/1987 | CA1222570A1 Predictive code conversion method capable of forcibly putting a feedback loop in an inactive state |
| 05/26/1987 | US4669093 PCM compression by encoding runs of zeroes |
| 05/26/1987 | US4668988 Non-linear digital emphasis circuit |
| 05/21/1987 | WO1987003128A1 Analog signal encoding and decoding apparatus and methods |
| 05/07/1987 | WO1987002849A1 Information transmission system, encoder and decoder |
| 05/06/1987 | EP0220880A2 Signal interpolator |
| 05/06/1987 | EP0220781A2 Decoding binary code words |
| 04/28/1987 | US4661954 Error protection of linearly coded digital signals |
| 04/22/1987 | EP0219169A1 Signal processing arrangement |
| 04/22/1987 | EP0218918A1 Multidimensional DPCM coder with a high processing speed |
| 04/22/1987 | EP0218917A1 Multidimensional DPCM coder with a high-processing speed |
| 04/21/1987 | CA1220867A1 Adaptive differential pcm system with residual-driven adaptation of feedback predictor |
| 04/14/1987 | US4658405 Radio communication system |
| 04/08/1987 | EP0217412A2 Coding device selectively connected to a transmission line |
| 04/08/1987 | EP0217017A2 Signal coding process and system for implementing said process |
| 04/08/1987 | EP0216903A1 Telemetry system for an implantable device |
| 04/08/1987 | CN85109755A Extrema coding digitizing signal processing method and apparatus |
| 04/07/1987 | US4656633 Error concealment system |
| 03/24/1987 | CA1219645A1 Adaptive digital signal coring circuit |
| 03/18/1987 | EP0214710A2 Transmission of coded image signals using priority coding of the transform coefficients |
| 03/17/1987 | CA1219333A1 Reduction of control bits for adaptive sub-nyquist encoder |
| 03/12/1987 | WO1987001542A1 Capacity expander for telephone line |
| 03/12/1987 | WO1987001531A1 Digital radio frequency receiver |
| 03/03/1987 | US4648133 Synchronization tracking in pulse position modulation receiver |
| 02/24/1987 | US4646290 Data transmission method and apparatus |
| 02/24/1987 | CA1218462A1 Compression and expansion of digitized voice signals |
| 02/17/1987 | CA1218157A1 Analog and digital signal apparatus |
| 02/10/1987 | CA1217832A Digital communication system |
| 02/03/1987 | US4641317 Spread spectrum radio transmission system |
| 02/03/1987 | US4641309 Method and apparatus for selectively compensating burst errors of variable length in successive digital data words |
| 01/27/1987 | US4639935 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission |
| 01/27/1987 | US4639911 Head-end and receiver for a signal distribution system |
| 01/20/1987 | CA1216948A1 Differential pulse code modulation transmission system |
| 01/07/1987 | EP0207575A2 Arrangement for predictive coding |
| 01/07/1987 | EP0107074B1 Process for the suppression of quantification noise superposed on a sinusoidal audible tone at the transmission in a digital telecommunication exchange |
| 12/31/1986 | WO1986007658A1 Digital information transmission system and method |
| 12/30/1986 | US4633523 Optical analog data link with simple self-test feature |
| 12/30/1986 | EP0206352A2 Coding transmission equipment for carrying out coding with adaptive quantization |
| 12/30/1986 | EP0206273A2 Adaptive differential pulse code modulation system |
| 12/30/1986 | CA1216069A1 Decoder of adaptive differential pulse code modulation |
| 12/30/1986 | CA1216068A1 Programmable coding and decoding arrangement |
| 12/23/1986 | US4631746 Compression and expansion of digitized voice signals |
| 12/23/1986 | CA1215780A1 Digital signal processing circuit |
| 12/23/1986 | CA1215771A1 Transmission system for digital signals |
| 12/17/1986 | CN85104802A Sampling rate converter for delta modulated signals |
| 12/16/1986 | US4630285 Method for reducing group delay distortion |
| 12/16/1986 | US4630257 Duplex speech transmission method and a system therefor |
| 12/16/1986 | US4630034 Sampling frequency converting apparatus |
| 12/16/1986 | US4630007 Delta modulated signal sampling rate converter using digital means |
| 12/10/1986 | EP0204296A2 Broadband-signal broadcasting system |