| Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274) |
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| 01/08/1991 | CA1278867C Method of and a device for digital signal coding by vector quantization |
| 01/02/1991 | EP0405839A2 Speech detector with improved line-fault immunity |
| 01/02/1991 | EP0405673A1 Device for buffering data for the duration of cyclically recurrent buffer periods |
| 01/02/1991 | EP0245363B1 Analog signal encoding and decoding apparatus and methods |
| 01/01/1991 | US4982285 Apparatus for adaptive inter-frame predictive encoding of video signal |
| 12/27/1990 | WO1990016128A1 Transmission output reducing signal processing device |
| 12/27/1990 | EP0404238A1 Devices for signal processing before and after transmission and/or storage with data rate reduction, and systems for transmitting and/or storing signals including such devices |
| 12/26/1990 | CN1011018B Extrema coding digitizing signal processing method and apparatus |
| 12/19/1990 | EP0402973A1 Digital transmission system, transmitter and receiver for use in the transmission system, and record carrier obtained by means of the transmitter in the form of a recording device |
| 12/18/1990 | US4979186 Time domain radio transmission system |
| 12/12/1990 | EP0401850A2 System and method of frequency calibration in a linked compression-expansion (Lincompex) system |
| 12/12/1990 | EP0401638A1 Package structure and transmission of the information generated by a video signal encoder |
| 12/09/1990 | CA2018174A1 System and method of frequency calibration in a linked compression-expansion (lincompex) system |
| 12/05/1990 | EP0400756A2 Method and apparatus for digitally processing a high definition television augmentation signal |
| 12/05/1990 | EP0400755A1 Digital transmission system using subband coding of a digital signal |
| 12/05/1990 | EP0400473A2 Digital signal processing apparatus |
| 12/05/1990 | EP0400222A1 Digital transmission system using subband coding of a digital signal |
| 12/04/1990 | US4975915 Data transmission and reception apparatus and method |
| 12/02/1990 | CA2475414A1 Decoder, receiver and method for decoding an encoded digital audio signal |
| 11/29/1990 | WO1990014719A1 Process for transmitting a signal |
| 11/28/1990 | EP0398973A1 Method and apparatus for electrical signal coding. |
| 11/22/1990 | EP0398830A1 Method and apparatus for compressing image data by mathematical transformation |
| 11/22/1990 | EP0397686A1 Apparatus for efficiently packing data in a buffer. |
| 11/20/1990 | US4972484 Method of transmitting or storing masked sub-band coded audio signals |
| 11/20/1990 | US4972466 Digital composite tone alerting |
| 11/20/1990 | CA1276726C Error correcting coder/decoder |
| 11/14/1990 | EP0397564A2 Method and apparatus for coding audio signals |
| 11/06/1990 | US4968970 Method of and system for power line carrier communications |
| 11/06/1990 | US4968969 Device and method for data transmission and/or acquisition using two cross polarizations of an electromagnetic wave and magnetic recording device |
| 10/31/1990 | EP0395494A2 Method of and system for power line carrier communications |
| 10/31/1990 | EP0395440A2 Apparatus for adaptive interframe predictive encoding of video signal |
| 10/31/1990 | EP0394493A1 Audio signal demodulation circuit |
| 10/31/1990 | EP0394491A1 Voice signal demodulation circuit |
| 10/25/1990 | DE4012527A1 Communications device for base band signals |
| 10/24/1990 | EP0393470A1 Transmission link |
| 10/23/1990 | US4965830 Apparatus for estimating distortion resulting from compressing digital data |
| 10/20/1990 | CA2014772A1 Transmission link |
| 10/19/1990 | CA2014827A1 Baseband signal communication apparatus |
| 10/03/1990 | CN1009892B Error detection and concealment using predicted signal values |
| 09/23/1990 | WO1990011650A1 Digital circuit for encoding binary information |
| 09/23/1990 | CA2048995A1 Digital circuit for encoding binary information |
| 09/20/1990 | WO1990010993A1 Video/audio multiplex transmission system |
| 09/20/1990 | WO1990010980A1 Time domain radio transmission system |
| 09/18/1990 | US4957688 System for the transmission of video signals with adaptive code word allocation, and also a transmitter and a receiver suitable for the system |
| 09/18/1990 | CA1274284A1 Circuit for producing clock signal for reproducing pcm signal |
| 09/11/1990 | US4956871 Improving sub-band coding of speech at low bit rates by adding residual speech energy signals to sub-bands |
| 09/05/1990 | EP0385492A2 Method and apparatus for data expansion |
| 09/04/1990 | US4955037 Apparatus and methods for recovering alignment from a non-ideally encoded multi-bit digital signal |
| 09/04/1990 | US4954824 Sample rate conversion system having interpolation function with phase locked clock |
| 08/30/1990 | DE4005830A1 Calculating coefficients of discrete cosine transformation - handling picture elements via remote transmission while fractionated |
| 08/29/1990 | EP0384544A2 Analog-to-digital encoder and digital-to-analog decoder |
| 08/28/1990 | US4953168 Digital signal recording apparatus |
| 08/22/1990 | EP0182915B1 Apparatus for transmitting digital signals |
| 08/22/1990 | EP0179056B1 Extended threshold analog to digital conversion apparatus for an rf receiver |
| 08/21/1990 | US4951052 Correction of systematic error in an oversampled analog-to-digital converter |
| 08/21/1990 | US4951049 Self clocking binary information encoder |
| 08/21/1990 | CA1273103A1 Broadband signal broadcasting system |
| 08/14/1990 | US4949383 Frequency domain speech coding |
| 08/09/1990 | WO1990009064A1 Low time-delay transform coder, decoder, and encoder/decoder for high-quality audio |
| 08/09/1990 | WO1990009022A1 Low bit rate transform coder, decoder and encoder/decoder for high-quality audio |
| 08/02/1990 | WO1990009063A1 Process for transmitting a signal |
| 07/31/1990 | CA1272311A1 Digital audio transmission system |
| 07/25/1990 | EP0379296A2 A low-delay code-excited linear predictive coder for speech or audio |
| 07/25/1990 | EP0378609A1 Process for transmitting an audio signal. |
| 07/24/1990 | US4944012 Speech analyzing and synthesizing apparatus utilizing differential value-based variable code length coding and compression of soundless portions |
| 07/18/1990 | EP0377687A1 Spectrally efficient method for communicating an information signal |
| 07/18/1990 | EP0377581A1 Analog/digital data storage system. |
| 07/18/1990 | EP0152430B1 Apparatus and methods for coding, decoding, analyzing and synthesizing a signal |
| 07/17/1990 | US4942607 Method of transmitting an audio signal |
| 07/10/1990 | US4941152 Signal coding process and system for implementing said process |
| 07/04/1990 | EP0376933A2 Digital to analog decoder |
| 07/04/1990 | EP0376554A2 Signal conversion apparatus which reduces quantization errors for telecommunications applications |
| 07/04/1990 | EP0376553A2 Perceptual coding of audio signals |
| 07/03/1990 | US4939749 Differential encoder with self-adaptive predictive filter and a decoder suitable for use in connection with such an encoder |
| 07/03/1990 | US4939734 Method and a system for coding and decoding data for transmission |
| 06/20/1990 | EP0166741B1 A digital communications system |
| 06/14/1990 | WO1990006632A1 Data compression |
| 06/13/1990 | EP0372970A1 Data compression |
| 06/13/1990 | EP0372601A1 Coder for incorporating extra information in a digital audio signal having a predetermined format, decoder for extracting such extra information from a digital signal, device for recording a digital signal on a record carrier, comprising such a coder, and record carrier obtained by means of such a device |
| 06/13/1990 | EP0372499A2 Apparatus and method for providing digital audio in the FM broadcast band |
| 06/12/1990 | US4933762 Method and coding and decoding devices for picture transmission through a variable rate network |
| 06/12/1990 | US4933675 Audio digital/analog encoding and decoding |
| 06/07/1990 | CA2004794A1 Data compression |
| 06/06/1990 | EP0371032A1 Protection of energy information in sub-band coding |
| 05/29/1990 | US4930126 Time division multiplex system suited for burst analog transmission |
| 05/23/1990 | EP0369630A2 Signal processing apparatus |
| 05/22/1990 | US4928318 Optical signal transmission system including pulsed FM modulator/demodulator |
| 05/08/1990 | US4924480 Codecs with suppression of multiple encoding/decodings across a connection |
| 05/08/1990 | US4924309 Method and circuit arrangement for improving the resolution of the coefficients of digital signals, particularly digital TV signals |
| 05/08/1990 | US4922874 Automobile electronic control modules communicating by pulse width modulated signals |
| 05/03/1990 | WO1990004891A1 Voice signal demodulation circuit |
| 05/03/1990 | WO1990004890A1 Voice signal demodulation circuit |
| 05/01/1990 | US4922537 Method and apparatus employing audio frequency offset extraction and floating-point conversion for digitally encoding and decoding high-fidelity audio signals |
| 04/25/1990 | CN1041678A System and method of transmitting complex waveform over communication channel utilizing lincompex techniques |
| 04/24/1990 | US4920544 Delta-sigma modulator |
| 04/17/1990 | US4918734 Speech coding system using variable threshold values for noise reduction |
| 04/17/1990 | US4918729 Voice signal encoding and decoding apparatus and method |
| 04/11/1990 | EP0362315A1 Device for monitoring acoustic signal processing systems. |
| 04/10/1990 | US4916742 Method of recording and reading audio information signals in digital form, and apparatus for performing same |
| 04/10/1990 | CA1267731A1 Serial digital signal processing circuitry |