Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 14 - Transmission systems not characterised by the medium used for transmission
Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274)
04/1990
04/04/1990EP0361384A2 Variable rate coder
04/03/1990US4914675 Apparatus for efficiently packing data in a buffer
03/1990
03/28/1990EP0360502A1 Efficient image signal coding system
03/27/1990US4912765 Voice band data rate detector
03/27/1990US4912763 Process for multirate encoding signals and device for implementing said process
03/21/1990EP0359325A1 Device for transmitting data words representing a digitized analog signal and device for receiving the transmitted data words
03/21/1990EP0359205A2 Optical communication system for simultaneous transmission of a baseband digital signal and multiple microwave subcarriers
03/21/1990EP0359183A2 System and method of transmitting a complex waveform over a communication channel utilizing lincompex techniques
03/20/1990US4910515 Digital signal processing circuit
03/20/1990CA1266919A1 Error concealment system
03/13/1990US4908622 Process and circuit for sampling according to instantaneous signal value, independent from the frequency range of the signal to be recorded
03/07/1990CN1007114B System structure recognition method for multiloop transmission system
03/06/1990US4907217 System and method of transmitting a complex waveform over a communication channel utilizing lincompex techniques
02/1990
02/26/1990EP0235264A4 Digital radio frequency receiver.
02/22/1990DE3828271A1 Method for the serial transmission of messages
02/20/1990US4903021 Signal encoding/decoding employing quasi-random sampling
02/06/1990US4899350 Signal communication capable of avoiding an audible reproduction of a sequence of information signals
01/1990
01/30/1990US4897856 Offset correction circuit for a sigma-delta coding device
01/24/1990EP0351479A1 Low bit rate voice coding method and device
01/23/1990US4896362 System for subband coding of a digital audio signal
01/23/1990US4896152 Telemetry system with a sending station using recursive filter for bandwidth limiting
01/10/1990CN1038735A Pcm communication system
01/10/1990CN1038732A Processor based linked compressor-expander telecommunications system
01/09/1990US4893123 Transmission system having a differential pulse code modulation encoding apparatus and an associated decoding apparatus
12/1989
12/27/1989EP0348074A2 PCM communication system
12/27/1989EP0261127B1 Tdm communication system for efficient spectrum utilization
12/26/1989US4890325 Speech coding transmission equipment
12/26/1989US4890283 High definition television augmentation channel
12/20/1989CN1038184A Adaptive extrema coding signal processing system
12/13/1989EP0192707B1 Method of decoding a predictively encoded digital signal
12/13/1989CN1038003A Method and apparatus for encoding and decoding information signal
12/12/1989US4887157 Method and apparatus for improving the resolution of digital signals
12/06/1989EP0344169A1 Transmission system.
11/1989
11/30/1989WO1989011761A1 Method for determining pcm coding law
11/30/1989WO1989011759A1 Process for transmitting an audio signal
11/28/1989US4884285 (DS) transmitter
11/23/1989EP0342686A2 Processor based linked compressor-expander telecommucications system
11/22/1989CN1037436A Sequence code
11/16/1989DE3815709A1 Im zeitbereich arbeitendes radarsystem In the time-domain working radar system
11/15/1989EP0341271A1 Coded communications system
11/08/1989EP0340301A1 Digital adaptive transform coding process
11/02/1989WO1989010661A1 Spectrally efficient method for communicating an information signal
10/1989
10/25/1989EP0338781A2 Data transmission and recording
10/25/1989EP0338040A1 Process for transmitting audio signals
10/25/1989CN1036651A Digital composite tone alerting
10/24/1989US4876698 System for transmitting sequences of digital samples encoded by variable-length binary words
10/19/1989WO1989010031A1 Method and apparatus for transmitting information
10/18/1989EP0337644A1 Method and apparatus for transmitting information
10/18/1989EP0337563A1 System for the transmission of video signals with adaptive code word allocation, and also a transmitter and a receiver suitable for the system
10/17/1989US4875222 Information signal transmission system by predictive differential coding
09/1989
09/27/1989EP0334714A1 Differential coder with a self-adaptive filter, and decoder for said coder
09/27/1989CN1035923A Method and arrangement for sigma delta converter for bandpass signals
09/26/1989US4870661 Sample rate conversion system having interpolation function
09/26/1989CA1261069A1 Two-channel coding of digital signals
09/26/1989CA1260641A1 (ds) transmitter
09/19/1989US4868689 Circuit for producing clock signal for reproducing PCM signal
09/19/1989CA1259706A1 Method of and arrangement for restoring invalid samples of an equidistantly sampled signal
09/13/1989EP0332345A2 Codecs with suppression of multiple encoding/decodings across a connection
09/12/1989US4866647 Continuously variable digital delay circuit
09/08/1989WO1989008357A1 Device for monitoring acoustic signal processing systems
09/06/1989EP0331405A2 Method and apparatus for processing a digital signal
09/06/1989EP0331371A2 Digital composite tone alerting
09/05/1989US4864636 Crystal controlled transmitter
08/1989
08/30/1989EP0330063A2 Adaptive extrema coding signal processing system
08/30/1989CN1035181A Method of and apparatus for reducing of loran-c navigational errors
08/29/1989US4862173 Method and circuit for carrying out forward and inverse quantization by varying a reference step size
08/29/1989US4862168 Audio digital/analog encoding and decoding
08/24/1989WO1989007866A1 Method and apparatus for electrical signal coding
08/23/1989EP0329381A2 Sampled data subsampling apparatus
08/23/1989EP0328736A2 Method and device for regenerating a PPM signal
08/22/1989US4860356 Adaptive extrema coding signal processing system
08/22/1989US4860312 Quality improvement for a digitally transmitted information signal
08/16/1989EP0328318A2 Delta-sigma modulator
08/16/1989EP0328156A1 Digital information transmission system and method
08/15/1989US4857928 Method and arrangement for a sigma delta converter for bandpass signals
08/15/1989CA1258534A1 Encoder capable of faithfully and adaptively encoding a moving image
08/15/1989CA1258532A1 Coding device selectively connected to a transmission line
08/10/1989WO1989007372A1 Apparatus for efficiently packing data in a buffer
08/10/1989WO1989007368A1 Method and arrangement for a sigma delta converter for bandpass signals
08/09/1989EP0327268A2 Interpolator for and method of interpolating digital samples
07/1989
07/26/1989EP0324975A2 Transmission system for telephone communication or data transfer
07/25/1989US4852129 Data compression system using frequency band translation and intermediate sample extrapolation
07/25/1989US4852035 Simple coefficient half-bandwidth digital filter for video data compression
07/25/1989CA1257930A1 A-d encoder and d-a decoder system
07/19/1989EP0324283A1 Speech coding
07/18/1989US4849758 System for transmitting or storing input signals
07/13/1989WO1989006418A1 Speech coding
07/11/1989US4847866 Differential pulse code modulation scheme incorporating a reconstructed value constrainer
07/04/1989US4845707 Frequency division multiplex/FM modulation recognition system
07/04/1989CA1256952A1 Signal processing arrangement
06/1989
06/27/1989CA1256616A1 Capacity expander for telephone line
06/21/1989EP0321318A1 Coding and decoding method and device for transmitting pictures via a network with a variable data flow
06/20/1989US4841571 Privacy signal transmission system
06/13/1989US4839923 Method and apparatus for time companding an analog signal
06/13/1989US4839906 Processor based linked compressor-expander telecommunications system
06/13/1989US4839897 Fault detecting system for ADPCM codec
06/13/1989US4839843 Method and apparatus for correcting a sequence of invalid samples of an equidistantly sampled signal
06/13/1989US4839724 Process for the digital transmission of information
06/06/1989US4837821 Signal transmission system having encoder/decoder without frame synchronization signal
06/06/1989US4837556 Signal transmission device
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