Patents
Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274)
06/1995
06/14/1995EP0658007A1 Circuit for the analog-digital conversion of IF-signals
06/14/1995EP0657999A1 Sampling frequency conversion
06/14/1995EP0657873A2 Speech signal bandwidth compression and expansion apparatus, and bandwidth compressing speech signal transmission method, and reproducing method
06/13/1995US5425082 Communication processing apparatus, communication processing system, and communication processing method
06/13/1995US5424739 Device and method for digitally shaping the quantization noise of an N-bit digital signal, such as for digital-to-analog conversion
06/13/1995CA2048457C Hands free telephone set
06/07/1995EP0656697A2 Method and apparatus for creating fast fading at a receiver using orthogonally polarized antennas and transmitter time diversity
06/07/1995EP0531455A4 Method and apparatus for encoding and decoding using wavelet-packets
06/06/1995US5423073 Acoustic signal transmitting system
06/01/1995DE4437790A1 Channel modulation process for finite state machine with error correction and entropy coding
05/1995
05/31/1995EP0655868A1 Device for encoding a video signal
05/31/1995EP0573409B1 Interpolative analog/digital converter for band-pass signals
05/30/1995US5420892 Stabilized noise shaper of a small scale having a suppressed quantization noise in high frequency region without deteriorating S/N ratio
05/24/1995EP0654194A1 A speech decoding method and a speech decoder
05/23/1995US5418821 Method and apparatus for sample-data receiver squelch
05/23/1995US5418571 Decoding of double layer video signals with interpolation replacement on missing data from enhancement layer
05/23/1995US5418531 Structured quantizer for sources with memory
05/18/1995WO1995013660A1 Quantization apparatus, quantization method, high efficiency encoder, high efficiency encoding method, decoder, high efficiency encoder and recording media
05/17/1995EP0653125A1 Data compression system using source representation
05/17/1995EP0653091A1 Discriminating between stationary and non-stationary signals
05/17/1995CN1102756A A method for repeaters to adaptively digitally code received analog information
05/16/1995US5416525 Method and apparatus for digitally coding and decoding a composite signal, containing baseband and out-of-band signals using relatively few bits and yielding a decoded out-of-band signal having increased quality
05/16/1995US5416483 Method and circuit for noise shaping
05/11/1995WO1995012943A1 Method and apparatus for the transmission of variable rate digital data
05/11/1995WO1995012939A1 Pulse position modulation with spread spectrum
05/04/1995WO1995012254A1 Transmission and reception of a first and a second main signal component
05/03/1995EP0650614A1 Digital signal processor architecture
05/02/1995US5412642 Method of absorbing delay fluctuation in cell transmission system and exchange utilizing the method
04/1995
04/26/1995EP0650286A2 Ringdown and ringback signalling for a computer-based multifunction personal communications system
04/26/1995EP0650281A1 Adaptive precoding and preemphasis for trellis coded modulation systems
04/26/1995EP0650265A2 Structured quantizer for sources with memory
04/26/1995EP0650261A1 Bandpass sigma-delta analog-to-digital converter (adc), method therefor, and receiver using same
04/26/1995EP0649558A1 Transmission system comprising at least a coder
04/26/1995EP0649557A1 Transmission system comprising at least a coder
04/25/1995US5410308 System for processing a digital signal including auxiliary data to facilitate data reconstitution at a decoder
04/23/1995CA2130538A1 Method and apparatus for adaptively providing precoding and preemphasis conditioning to signal data for transfer over a communication channel
04/20/1995WO1995010890A1 Transmission system implementing different coding principles
04/20/1995WO1995010885A1 Pulse code bit cell demodulation
04/20/1995DE4335305A1 Method and circuit arrangement for transmitting voice signals
04/18/1995US5408583 Sound outputting devices using digital displacement data for a PWM sound signal
04/18/1995CA2053890C Time domain radio transmission system
04/13/1995WO1995008241A3 Apparatus for and method of speech digitizing
04/12/1995EP0648024A1 Audio coder using best fit reference envelope
04/11/1995US5406583 Modem with received signals and transmitted signals comprising signal sets
04/11/1995CA2026207C Low time-delay transform coder, decoder, and encoder/decoder for high-quality audio
04/06/1995DE4405659C1 Method for the cascaded coding and decoding of audio data
04/06/1995DE4333358A1 Schaltungsanordnung zur Informationsübertragung auf einer Zweidrahtleitung Circuitry for transmitting information on a two-wire line
04/04/1995CA2026213C Low bit rate transform coder, decoder and encoder/decoder for high-quality audio
03/1995
03/30/1995WO1995008877A1 Transcoding and transdecoding unit, and method for adjusting the output thereof
03/30/1995DE4332735A1 Verfahren zur digitalen Erzeugung eines komplexen Basisbandsignals A method for digitally generating a complex baseband signal
03/29/1995EP0645900A2 Method and apparatus for data transmission by means of circular polarized waves
03/29/1995EP0645896A2 Method for duplex data transmission between a beacon and a vehicle
03/29/1995EP0645755A1 Speech coding apparatus and method using classification rules
03/29/1995CN1100859A Direct phase digitizing apparatus and method
03/28/1995US5402248 Image encoding apparatus and method
03/23/1995WO1995008241A2 Apparatus for and method of speech digitizing
03/23/1995WO1995008152A1 Method and apparatus for detecting bad frames of information in a communication system
03/23/1995CA2149214A1 Apparatus for and method of speech digitizing
03/23/1995CA2147497A1 Method and apparatus for detecting bad frames of information in a communication system
03/22/1995EP0643886A1 Dynamic loader.
03/21/1995US5400433 Decoder for variable-number of channel presentation of multidimensional sound fields
03/21/1995US5400371 System and method for filtering random noise using data compression
03/21/1995US5400024 Digital signal processing apparatus for converting a digital signal from one transmission rate to another transmission rate
03/21/1995US5400022 Pulse code bit cell demodulation
03/15/1995EP0643512A1 Apparatus for the detection of the loss of frame synchronisation for multidimensional modulations
03/15/1995EP0643477A2 Demodulation of an IF-signal by a sigma-delta converter
03/15/1995EP0643380A2 Speech speed conversion method and apparatus
03/14/1995US5398029 Sampling rate converter
03/11/1995CA2131730A1 Speech speed conversion method and speech speed conversion apparatus
03/09/1995WO1995006984A1 Sub-band coder with differentially encoded scale factors
03/09/1995DE4431998A1 Hearing aid system
03/08/1995EP0642286A2 Mobile communication apparatus having recording/reproducing function
03/08/1995EP0642129A1 Transmission system with reconstruction of missing signal samples
03/08/1995EP0641503A1 A method for repeaters to adaptively digitally code received analog information
03/07/1995US5396519 Method and apparatus for adaptively providing precoding and preemphasis conditioning to signal data for transfer over a communication channel
03/07/1995US5396248 Noise shaping circuit
03/07/1995US5396238 Data compressing and expanding apparatus for tone generation
03/07/1995CA1334690C Speech coder with coded amplitudes multiplied by factors dependent on pulse position
03/01/1995EP0524264B1 Adaptive-block-length, adaptive-transform, and adaptive-window transform coder and decoder for high-quality audio
02/1995
02/28/1995US5394473 Adaptive-block-length, adaptive-transforn, and adaptive-window transform coder, decoder, and encoder/decoder for high-quality audio
02/28/1995US5394437 High-speed modem synchronized to a remote CODEC
02/22/1995EP0639913A1 Apparatus for resolving phase ambiguities in a DPSK radio link
02/21/1995US5392044 Method and apparatus for digitizing a wide frequency bandwidth signal
02/16/1995DE4326900A1 Method and device for establishing readiness to communicate
02/15/1995EP0638859A2 Signal processing device
02/14/1995US5390256 Dynamic loader
02/08/1995EP0637892A2 System and method for transmitting images at high efficiency
02/07/1995US5387910 Signal processor
02/03/1995CA2129169A1 Transmission system with reconstruction of missing signal samples
02/01/1995EP0636291A1 Coordinated coding for digital transmission
01/1995
01/31/1995US5386436 Synchronization system for use in digital transmission system
01/26/1995WO1995002930A1 Computationally efficient adaptive bit allocation for coding method and apparatus
01/26/1995WO1995002929A1 Computationally efficient adaptive bit allocation for encoding method and apparatus with allowance for decoder spectral distortions
01/26/1995WO1995002928A1 Hybrid adaptive allocation for audio encoder and decoder
01/24/1995US5384811 Method for the transmission of a signal
01/24/1995US5384807 ADPCM transcoder with integral tone generation and method therefor
01/24/1995US5384725 Method and apparatus for encoding and decoding using wavelet-packets
01/24/1995US5384552 Clock recovery circuit for extracting clock information from a received baseband signal
01/18/1995EP0634845A2 Noise burst detection in an ADPCM decoder
01/18/1995EP0568532B1 Process for transmitting digitised, block-coded audio signals using scale factors
1 ... 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 ... 73