| Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274) |
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| 04/07/1999 | EP0906681A1 Improved coding system for digital transmission compression |
| 04/07/1999 | EP0906613A1 Method and device for coding an audio signal by "forward" and "backward" lpc analysis |
| 04/06/1999 | US5892774 Phase shift encoded subchannel |
| 04/06/1999 | US5892746 System for recording and/or reproducing a pulse code modulation digital audio signal |
| 04/06/1999 | CA2129464C Transmitting device, receiving device, system and method for transmitting image at high efficiency |
| 04/06/1999 | CA2033874C Digital signal processing method and system, electric power system signal processing system and electric power control system |
| 03/31/1999 | EP0905918A2 Method and apparatus for encoding audio signals |
| 03/31/1999 | EP0612410B1 Scanning process for jitter signals |
| 03/31/1999 | CN1212594A Communication method, transmission and reception apparatuses, and cellular radio communication system |
| 03/30/1999 | US5890105 Low bit rate coding system for high speed compression of speech data |
| 03/25/1999 | WO1999014866A2 Transmission system with improved reconstruction of missing parts |
| 03/24/1999 | EP0903883A2 System and method for adaptive modification of modulated and coded schemes in a communication system |
| 03/18/1999 | WO1999013604A1 Method and system for controlling speech encoding in a communication system |
| 03/18/1999 | WO1999013602A1 Method and system for controlling an encoding rate in a variable rate communication system |
| 03/18/1999 | DE19738127A1 Tonfrequenz-Rundsteuersender mit einem kapazitiven Speicher aufweisenden Pulsstromrichter Audio-frequency ripple control transmitter with a capacitive memory having pulse converter |
| 03/18/1999 | CA2302279A1 Method and system for controlling speech encoding in a communication system |
| 03/16/1999 | CA2125718C A modem with received signals and transmitted signals comprising signal sets |
| 03/11/1999 | WO1999012342A1 Apparatus and method for supporting analog fax calls in a tandem configuration |
| 03/11/1999 | WO1999012258A2 Audio frequency ripple control transmitter with a pulsed a.c. rectifier provided with a capacitive accumulator |
| 03/04/1999 | WO1999010988A2 Spread spectrum communication device |
| 03/02/1999 | US5878387 Coding apparatus having adaptive coding at different bit rates and pitch emphasis |
| 02/25/1999 | WO1999009684A1 Post-compression hidden data transport for video |
| 02/25/1999 | WO1999009656A2 Method and circuit layout for the transmission of messages by means of approximating hermitian functions |
| 02/24/1999 | EP0898400A2 Communication method, transmission and reception apparatuses, and cellular radio communication system |
| 02/24/1999 | CN1209032A Portable telephone device |
| 02/23/1999 | US5875423 Method for selecting noise codebook vectors in a variable rate speech coder and decoder |
| 02/18/1999 | DE19735097A1 Message transmission method |
| 02/17/1999 | CN1208489A Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation |
| 02/17/1999 | CN1042185C Method and apparatus for noise burst detection in a signal processor |
| 02/16/1999 | US5873065 Two-stage compression and expansion of coupling processed multi-channel sound signals for transmission and recording |
| 02/16/1999 | US5872755 Method of recording on a disc medium a ΣΔ-modulated signal with a sampling frequency times 44.1 kHz |
| 02/16/1999 | US5872531 Signal encode/decode system |
| 02/16/1999 | CA2109877C Clock recovery circuit |
| 02/11/1999 | WO1999007076A2 Adaptive channel encoding method and device |
| 02/10/1999 | EP0895672A2 Communication network for transmitting speech signals |
| 02/09/1999 | US5870435 Quantization/inverse quantization unit selectably accommodating multiple video encoding standards and including differential pulse code modulator |
| 02/09/1999 | US5870046 Analog isolation system with digital communication across a capacitive barrier |
| 02/04/1999 | WO1999005806A1 Method and apparatus for performance improvement by qualifying pulses in an oversampled, noise-shaping signal processor |
| 02/04/1999 | DE19742201C1 Method of encoding time discrete audio signals, esp. for studio use |
| 02/04/1999 | CA2296251A1 Method and apparatus for performance improvement by qualifying pulses in an oversampled, noise-shaping signal processor |
| 02/03/1999 | EP0895359A2 Data converter with gain scaling including dither |
| 02/03/1999 | EP0894409A1 Detection of speech channel back-looping |
| 02/02/1999 | US5867529 Shaping filter for high data rate signalling |
| 02/02/1999 | US5867508 Method and device for the correction of errors in the transmission of series of information items |
| 01/28/1999 | WO1998047297A3 Advance indication of a transcoding change |
| 01/27/1999 | EP0892974A1 Method and arrangement for reconstruction of a received speech signal |
| 01/26/1999 | US5864800 Methods and apparatus for processing digital signals by allocation of subband signals and recording medium therefor |
| 01/26/1999 | US5864311 Systems for enhancing frequency bandwidth |
| 01/19/1999 | US5862184 Mapper for high data rate transmission through channels subject to robbed bit signalling |
| 01/19/1999 | US5862179 Mapper for high data rate signalling |
| 01/19/1999 | US5862178 Method and apparatus for speech transmission in a mobile communications system |
| 01/19/1999 | CA2057617C Communications signal |
| 01/14/1999 | WO1999001941A1 Device for transmitting a coded adpcm voice signal |
| 01/13/1999 | EP0890943A2 Voice coding and decoding system |
| 01/13/1999 | EP0654194B1 A speech decoding method and a speech decoder |
| 01/12/1999 | US5860060 Method for left/right channel self-alignment |
| 01/12/1999 | US5859949 Transmission, recording and reproduction of digital data and time information in transport packets using a compression ratio |
| 01/07/1999 | WO1998045977A3 Mapper for high data rate transmission through channels subject to robbed bit signalling |
| 01/07/1999 | DE19827815A1 Data transmission system e.g. for image data |
| 01/06/1999 | CN1204193A Method for transmitting two parallel channels using code division and apparatus realising the method |
| 01/05/1999 | US5857168 Method and apparatus for coding signal while adaptively allocating number of pulses |
| 12/30/1998 | CN1203718A Digital-to-analog communication device and method |
| 12/30/1998 | CN1203717A Digital-to-analog communication device and method |
| 12/29/1998 | US5854841 Communication system |
| 12/29/1998 | US5854600 For converting/encoding analog signals to a standard digital format |
| 12/29/1998 | CA2136887C High speed quantization-level-sampling modem with equalization arrangement |
| 12/23/1998 | EP0792502A4 Very low bit rate voice messaging system using asymmetric voice compression processing |
| 12/22/1998 | US5852805 MPEG audio decoder for detecting and correcting irregular patterns |
| 12/22/1998 | US5852684 Composite signal |
| 12/22/1998 | US5852634 Data coding system |
| 12/19/1998 | CA2241122A1 Digital exchange |
| 12/17/1998 | WO1998057435A1 Spectral and power shaping mapper for high data rate signalling |
| 12/16/1998 | EP0884879A2 QAM transmission using spread spectrum and sequence estimation |
| 12/16/1998 | EP0823154B1 Method and device for transmitting analogue signals by means of a transmission system using optical transmission lines |
| 12/16/1998 | EP0815660B1 Process for monitoring the quantisation quality in digital radio or television transmission systems |
| 12/16/1998 | CN1202058A Demodulator |
| 12/15/1998 | US5850574 Apparatus for voice encoding/decoding utilizing a control to minimize a time required upon encoding/decoding each subframe of data on the basis of word transfer information |
| 12/15/1998 | US5850527 Information providing apparatus |
| 12/15/1998 | US5850501 Transmission recording and reproduction of digital data and time information in transport packets using a compression ratio |
| 12/13/1998 | CA2217471A1 Asynchronous digital system, asynchronous data path circuit, asynchronous digital signal processing circuit and asynchronous digital signal processing method |
| 12/02/1998 | EP0881786A2 Method and apparatus for transmitting two parallel channels using code division |
| 12/02/1998 | EP0881639A2 Automatic equalization system |
| 12/02/1998 | CN1200603A Automatic equalization system |
| 12/01/1998 | US5845043 Transmission recording and reproduction of digital data and time information in transport packets using a compression ratio |
| 12/01/1998 | US5845042 Transmission recording and reproduction of digital data and time information in transport packets using a compression ratio |
| 12/01/1998 | US5844513 Method and apparatus for transmitting sigma delta modulated audio signals |
| 12/01/1998 | US5844508 Data coding method, data decoding method, data compression apparatus, and data decompression apparatus |
| 11/25/1998 | EP0880256A2 Portable telephone device |
| 11/25/1998 | CN1199959A Audio coding method and apparatus |
| 11/24/1998 | US5842135 Short wave transmission method and apparatus therefor |
| 11/24/1998 | US5841388 A/D converter apparatus with frequency conversion function and radio apparatus using the same |
| 11/24/1998 | CA2094991C Image coding/decoding apparatus |
| 11/19/1998 | WO1998052188A1 Audio signal encoder, audio signal decoder, and method for encoding and decoding audio signal |
| 11/19/1998 | WO1998035447A3 Audio coding method and apparatus |
| 11/17/1998 | US5839100 Lossless and loss-limited compression of sampled data signals |
| 11/17/1998 | US5839098 Speech coder methods and systems |
| 11/17/1998 | US5838724 Spectral and power shaping mapper for high data rate signalling |
| 11/17/1998 | US5838274 Systems for achieving enhanced amplitude resolution |
| 11/12/1998 | WO1998050983A1 Communications system |
| 11/12/1998 | WO1998035450A3 An information coding method and devices utilizing error correction and error detection |