Patents
Sitemap › H03 - Basic electronic circuitry › H03M - Coding, decoding or code conversion, in general › H03M 3 - Conversion of analogue values to or from differential modulation
Patents for H03M 3 - Conversion of analogue values to or from differential modulation (7,070)
10/1984
10/02/1984US4475227 Adaptive prediction
09/1984
09/26/1984EP0119716A2 Coder-decoder and control thereof
09/26/1984EP0119529A2 Interpolative A/D conversion method
09/05/1984EP0117525A2 Quantisizer for DPCM encoders
09/04/1984US4470146 Adaptive quantizer with instantaneous error robustness
08/1984
08/28/1984US4468790 System for the quantization of signals
08/21/1984US4467291 Delta modulator having optimized loop filter
08/07/1984US4464783 Speech coding method and device for implementing the improved method
07/1984
07/25/1984EP0114078A2 An adaptive digital filter
07/24/1984US4462106 Electrical system
06/1984
06/05/1984US4453158 Method for encoding analog signals
05/1984
05/01/1984US4446565 CVSD Transmission with improved intelligibility of voice signals
04/1984
04/27/1984EP0081568A4 Enhanced delta modulation encoder.
04/04/1984EP0104988A1 Double integration delta-sigma encoder and use of this encoder in a PCM transmission path and in the measuring of DC voltages
04/04/1984EP0104470A2 Fast DPCM coder
04/04/1984EP0104469A2 Digital DPCM coder with high processing speed
04/03/1984CA1165028A1 Interpolative analog-to-digital converter for subscriber line audio processing circuit apparatus
03/1984
03/27/1984US4439756 Delta-Sigma modulator with switch capacitor implementation
03/20/1984US4438523 Differential digital modulation and demodulation system with an analog signal-dependent sampling clock
03/20/1984US4438522 Method for encoding analog signals using PCM difference code word for forming a code word of specified length
03/13/1984US4437087 Adaptive differential PCM coding
02/1984
02/21/1984US4433423 High quality delta modulator
02/21/1984US4433311 Delta modulation system having reduced quantization noise
10/1983
10/18/1983US4411003 Multiple-loop adaptive delta modulator
10/18/1983US4411002 Method and apparatus for a continuously variable slope delta range extender
10/18/1983US4411001 Differential pulse code modulation transmission system
10/18/1983CA1155556A1 Adaptive delta modulator
10/18/1983CA1155555A1 Transmission system using differential pulse code modulation
10/11/1983CA1155226A1 Adaptive prediction differential-pcm transmission method and circuit using filtering by sub-bands and spectral analysis
09/1983
09/20/1983US4406010 Receiver for CVSD modulation with integral filtering
08/1983
08/10/1983EP0085625A2 Filtering and frequency detection circuits for delta modulated signals
08/10/1983EP0085297A2 High quality delta modulator
08/04/1983WO1983002696A1 Adaptive differential pcm coding
07/1983
07/27/1983EP0084353A2 Delta-sigma modulator with switched capacitor implementation
07/26/1983CA1150792A1 Method and apparatus for signal transmission
07/12/1983US4393371 Analogue to digital signal conversion and storage system
07/05/1983CA1149289A1 Adpcm system for speech or like signals
06/1983
06/22/1983EP0081568A1 Enhanced delta modulation encoder.
06/21/1983US4389726 Adaptive predicting circuit using a lattice filter and a corresponding differential PCM coding or decoding apparatus
06/21/1983CA1148661A1 Adpcm system for speech or like signals
06/08/1983EP0080725A2 Method and apparatus for A/D conversion
05/1983
05/25/1983EP0079658A1 Differential pulse code modulation transmission system
05/24/1983US4385393 Adaptive prediction differential PCM-type transmission apparatus and process with shaping of the quantization noise
05/17/1983US4384278 One-bit codec with slope overload correction
05/11/1983EP0078581A1 Differential PCM transmission system with adaptive prediction
03/1983
03/09/1983EP0073309A2 Compression and expansion (quantification) of digital differentially encoded television signals
03/08/1983CA1142639A1 Expansion and compression of television signals by use of differential coding
02/1983
02/22/1983US4375013 Device for digit rate reduction of PCM-signals
02/01/1983US4371972 Adaptive delta modulator
02/01/1983US4371850 High accuracy delta modulator
01/1983
01/25/1983CA1140266A1 Adaptive delta modulation network
12/1982
12/23/1982WO1982004508A1 Enhanced delta modulation encoder
11/1982
11/30/1982US4361893 Transmission system using differential pulse code modulation
11/10/1982EP0064119A2 Speech coding methods and apparatus for carrying out the method
10/1982
10/19/1982CA1134044A1 Delta modulation detector
10/12/1982US4354273 ADPCM System for speech or like signals
10/12/1982CA1133637A1 (b a)-bit-a/d convertor with b-bit auxiliary a/d convertor
09/1982
09/28/1982US4352191 Hybrid companding delta modulation system
09/22/1982EP0060583A1 System for the quantization of signals
09/21/1982CA1132264A1 Conversion of analogue signals to digital signals
09/08/1982EP0059257A1 Analog signal coding method
08/1982
08/24/1982CA1130460A1 Delta modulation decoder
07/1982
07/22/1982WO1982002462A1 Receiver for cvsd modulation with integral filtering
07/21/1982EP0056299A1 Circuit for generating a delta value
07/06/1982CA1127309A1 Optimized digital delta modulation compander having truncation effect error recovery
07/06/1982CA1127308A1 Adaptive delta modulation system
06/1982
06/09/1982EP0053243A1 Digital differential modulation and demodulation system with sampling frequency depending on the analog signal
03/1982
03/30/1982CA1121057A1 Noise reduction method and apparatus for companded delta modulators
03/09/1982US4319082 Adaptive prediction differential-PCM transmission method and circuit using filtering by sub-bands and spectral analysis
03/09/1982CA1119724A1 Predictive speech signal coding with reduced noise effects
03/02/1982US4318086 (b+a)-Bit-A/D convertor with b-bit auxiliary A/D convertor
02/1982
02/23/1982US4317208 ADPCM System for speech or like signals
12/1981
12/24/1981WO1981003725A1 Interpolative analog-to-digital converter for subscriber line audio processing circuit apparatus
12/15/1981US4306223 Data handling system using a sequential approximation encoding and decoding technique
12/08/1981US4305050 Circuitry for generating reference signal for delta encoding systems
11/1981
11/10/1981CA1112366A1 Apparatus for analog to digital conversion
10/1981
10/20/1981US4296412 Method and apparatus for signal transmission
09/1981
09/29/1981US4292651 Expansion and compression of television signals by use of differential coding
09/22/1981US4291299 Analog to digital converter using timed level changes
09/01/1981US4287595 Adaptive delta-modulation network
08/1981
08/12/1981EP0033565A2 Adaptive delta modulator
08/04/1981CA1106499A1 Adaptive delta modulation system
07/1981
07/08/1981EP0031450A1 Digital delta modulation compander
05/1981
05/26/1981CA1102002A1 Digital multi-line companded delta modulator
04/1981
04/28/1981US4264974 Optimized digital delta modulation compander having truncation effect error recovery
04/22/1981EP0027233A1 Coding method for analog signals
04/07/1981CA1099018A1 Predictive encoder or decoder with selection of one of two or more prediction signals according to prediction error signal amplitudes
03/1981
03/03/1981US4254502 Digital encoding circuitry
02/1981
02/25/1981EP0024243A1 Device for reducing the data rate of a PCM signal
02/17/1981US4251804 Delta modulation utilizing selectable piecewise linear waveform approximation
01/1981
01/13/1981CA1093697A1 Digital-to-analogue converter
01/13/1981CA1093696A1 Dynamic control of code modulated pulse transmission
01/06/1981US4243977 Delta sigma to PCM converter
12/1980
12/16/1980CA1091810A1 Predictive codec capable of selecting one of at least three prediction signals in two steps
11/1980
11/11/1980US4233684 Arrangement for decoding a signal encoded by means of adaptive delta modulation
11/04/1980CA1089099A1 Delta-modulation encoder
11/04/1980CA1089098A1 Transmission system for signal transmission by means of compressed delta modulations
10/1980
10/21/1980US4229820 Multistage selective differential pulse code modulation system
10/14/1980CA1087737A1 Adaptive digital delta modulation for voice transmission
10/01/1980EP0016048A1 Predictive differential pulse-code modulation apparatus
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