| Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274) |
|---|
| 10/28/1980 | US4231101 Digital filter arrangement for non-uniformly quantized PCM |
| 10/28/1980 | US4231022 Interpolative PCM decoder utilized for μ-law and A-law |
| 10/28/1980 | US4230903 Data transmission system |
| 10/21/1980 | US4229827 Single voltage controlled oscillator modem |
| 10/21/1980 | US4229820 Multistage selective differential pulse code modulation system |
| 10/14/1980 | US4228545 Receiver device having a function for suppressing transient noises during abrupt interruptions |
| 10/14/1980 | US4228320 Noise detector for frequency modulation systems |
| 10/07/1980 | US4227255 Signal classifier |
| 10/01/1980 | EP0016472A1 Arrangement with a hybrid for the two-wire to four-wire transition in PCM-time division multiplexing systems |
| 09/30/1980 | US4225963 Arrangement for processing a delta modulation signal, in particular for decoding these signals |
| 09/30/1980 | US4225885 Method and apparatus for adaptive transform coding of picture signals |
| 09/09/1980 | US4222072 Video player/recorder with non-linear mark length modulation |
| 09/09/1980 | US4222008 Apparatus for dividing an arbitrary waveform into equal-amplitude steps |
| 09/02/1980 | US4220925 Encoding analog signals into digital signals using a triangular reference |
| 08/26/1980 | US4219879 Digital to analog conversion system |
| 08/12/1980 | CA1083717A1 Signal coding for telephone communication system |
| 08/05/1980 | US4216460 Transmission and/or recording of digital signals |
| 08/05/1980 | US4216354 Process for compressing data relative to voice signals and device applying said process |
| 08/05/1980 | CA1083260A1 Analog to digital converter |
| 07/29/1980 | US4215311 Adaptive delta-modulation system |
| 07/22/1980 | CA1082313A1 Transmitter/receivers |
| 07/15/1980 | CA1081790A1 Transmission system with a transmitter and a receiver for signal transmission by means of discrete output values which characterize the tansmitted signqls in time quantizationaand an at least trivalent amplitude quantization |
| 07/09/1980 | EP0013070A1 Video record systems |
| 07/09/1980 | EP0012979A1 Method for the transmission of several signals via a lightwave guide link, in particular between an exchange and a subscriber's connection |
| 07/09/1980 | EP0012766A1 Predictive speech signal coding with reduced noise effects |
| 07/08/1980 | US4211979 Circuit arrangement for eliminating waveform distortion of an angle-modulated signal transmitted over multipaths |
| 07/08/1980 | US4211978 Cross-talk component cancellation circuit in an angle-modulated wave signal transmission system |
| 06/25/1980 | EP0012515A1 Instrument for testing susceptibility of PCM regenerators to noise |
| 06/03/1980 | US4206316 Transmitter-receiver system utilizing pulse position modulation and pulse compression |
| 05/28/1980 | EP0011341A1 Differential pulse code modulation transmission system |
| 05/20/1980 | US4204163 Minimum group pulse code modem having shape and amplitude codes |
| 05/20/1980 | CA1078063A1 Noise reduction circuit |
| 05/13/1980 | US4203092 Analogue-to-digital converter |
| 05/13/1980 | CA1077624A1 Gain method and apparatus for a delta modulator |
| 04/29/1980 | US4200886 Method for transmitting video signals with the aid of DPC modulation and controlled quantizer |
| 04/29/1980 | CA1076661A1 Signal processing means and method |
| 04/15/1980 | US4198600 Demodulating system for auxiliary channel in straight-through radio frequency repeater |
| 04/08/1980 | CA1075361A1 Data transmission, particularly with delta modulation |
| 03/04/1980 | US4191858 Block digital processing system for nonuniformly encoded digital words |
| 02/19/1980 | US4189715 μ-Law to floating point converter |
| 02/05/1980 | US4187466 Signal injection technique |
| 02/05/1980 | CA1071310A1 Receiver for the reception of signals transmitted by pulse code modulation |
| 02/05/1980 | CA1071308A1 Pulse code modulation with dynamic range limiting |
| 01/15/1980 | US4184150 Circuit arrangement for halving the sampling rate of a delta modulation signal |
| 01/15/1980 | US4184116 Communication system having analog-to-digital-to-analog conversion means |
| 01/15/1980 | US4184052 AM/FM time division surface wave device transmitter |
| 01/01/1980 | US4181914 System for reducing transmission problems in a parallel digital data transmission system |
| 12/18/1979 | US4179660 Method and device for transmitting pulse-duration modulated signals using two oscillators |
| 12/18/1979 | US4179659 Signal transmission system |
| 12/18/1979 | CA1068346A1 Arrangement for the transmission of information signals by pulse code modulation |
| 12/11/1979 | US4178553 Sampling modulated waves |
| 11/27/1979 | US4176321 Delta modulation detector |
| 11/15/1979 | WO1979000901A1 Predictive speech signal coding with reduced noise effects |
| 11/13/1979 | US4174502 Delta modulated digital signal detector |
| 11/13/1979 | CA1066362A1 Methods and apparatus for reducing intelligible crosstalk in single sideband radio systems |
| 11/06/1979 | US4173771 High speed predictive encoding and decoding system for television video signals |
| 10/23/1979 | CA1065069A1 Signal coding for telephone communication system |
| 10/16/1979 | CA1064618A1 Compression of gray scale imagery to less than one bit per picture element |
| 10/09/1979 | US4170755 FM transmitter and receiver for use with non-destructive testing apparatus including a moveable head |
| 10/09/1979 | CA1064172A1 Apparatus for suppressing background noise in a digital telephone system |
| 09/11/1979 | US4167731 Integrating code converter |
| 09/05/1979 | EP0003848A1 Digital signal transmission system |
| 08/28/1979 | CA1061413A1 Synchronization for pcm transmission systems |
| 07/26/1979 | WO1979000462A1 A method and an arrangement for reducing the demand on the number of transferred bits when transferring pcm information |
| 07/24/1979 | US4162376 Conference call circuit using reversible analog to digital converter |
| 07/17/1979 | US4161627 Method of and system for generating digital test signals |
| 07/11/1979 | EP0002998A1 Method and system for speech data compression |
| 07/10/1979 | US4160878 Conference circuit with digital-analog and analog-digital conversion |
| 07/03/1979 | US4160123 Methods of and apparatus for the encoded transmission of information |
| 06/26/1979 | US4159448 Communication systems |
| 05/15/1979 | CA1054719A1 Circuit for curtailing effects of bit errors in pulse coded transmission |
| 05/01/1979 | US4152760 Industrial process control system |
| 04/24/1979 | US4151469 Apparatus equipped with a transmitting and receiving station for generating, converting and transmitting signals |
| 04/24/1979 | CA1053373A1 Differential pulse coded system using shift register companding |
| 04/17/1979 | US4150368 Signal coding for compressed pulse code modulation system |
| 04/17/1979 | US4150367 Encoder/decoder system employing pulse code modulation |
| 04/10/1979 | US4149168 Sequentially balanced modulation tone ranging system and method |
| 04/03/1979 | CA1052006A1 Adaptive delta modulation system |
| 02/27/1979 | US4142071 Quantizing process with dynamic allocation of the available bit resources and device for implementing said process |
| 02/27/1979 | US4142066 Suppression of idle channel noise in delta modulation systems |
| 01/30/1979 | CA1047606A1 System comprising an integrating digital signal processing device |
| 01/09/1979 | US4134068 Transmitter/receivers |
| 01/09/1979 | US4133976 Predictive speech signal coding with reduced noise effects |
| 01/02/1979 | US4133006 Predictive encoder or decoder with selection of one of two or more prediction signals according to prediction error signal amplitudes |
| 12/12/1978 | US4129751 PCM data throttle |
| 11/14/1978 | US4125812 Apparatus for baseline restoration in an AC-coupled signal |
| 11/14/1978 | CA1042353A1 Method and apparatus for error reduction in digital information transmission systems |
| 11/07/1978 | US4124869 System for the digital clamping of periodic, binary encoded signals |
| 10/24/1978 | US4122391 Frequency deviation measuring and adjusting system |
| 10/24/1978 | US4122300 Data transmission system and application thereof to the transmission of analog signals and of data in a network with delta modulation |
| 09/12/1978 | US4113997 Analog to digital signal of logarithmic format converter and analog to pseudo-rms value converter and echo canceller utilizing same |
| 08/29/1978 | US4110705 Noise reduction method and apparatus for companded delta modulators |
| 08/29/1978 | US4110692 Audio signal processor |
| 08/29/1978 | CA1037599A1 Time-division pulse-multiplex digital electric signal switching circuit arrangement |
| 08/22/1978 | US4109204 Apparatus and method for wideband communication with suppression of harmonic interference |
| 08/22/1978 | US4109203 Delta-modulation encoder |
| 08/22/1978 | CA1037168A1 Device for converting an incoming analog signal into an outgoing pcm signal |
| 08/15/1978 | US4107669 Apparatus for analog to digital conversion |
| 07/25/1978 | US4103108 Circuit and method for digitally measuring signal levels of pcm encoded signals |
| 07/18/1978 | US4101964 Digital filter for pulse code modulation signals |