Patents
Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274)
02/2003
02/18/2003US6522695 Transmitting device for transmitting a digital information signal alternately in encoded form and non-encoded form
02/18/2003CA2245797C System and method for adaptive modification of modulated and coded schemes in a communication system
02/13/2003WO2003013090A1 Simple encoding/decoding technique for code position modulation
02/13/2003US20030031463 Recording and reproducing an MPEG information signal on/from a record carrier
02/13/2003US20030031262 Recording of super-audio or like one-bit-per-sample signals on a PCM recorder
02/12/2003EP0749647B1 Method and apparatus for determining a masked threshold
02/12/2003CN1397115A 模拟滤波器 Analog filter
02/11/2003US6518902 PC card and WLAN system having high speed, high resolution, digital-to analog converter with off-line sigma delta conversion and storage
02/11/2003CA2258695C Method and device for coding an audio signal by "forward" and "backward" lpc analysis
02/06/2003WO2003010929A1 Method and system for transmitting data from a first data network into a second data network
02/06/2003WO2002041651A3 Methods and apparatus for identifying asset location in mobile co mmunication networks
02/06/2003US20030027361 Including two or more processing units for processing wafers and a transferring unit for carrying the wafers
02/06/2003CA2454274A1 Method and arrangement for transmission of data from a first data network to a second data network
01/2003
01/30/2003WO2003009589A1 Precision timing generator apparatus and associated methods
01/30/2003WO2002041545A3 Wireless clock synchronization
01/30/2003US20030023909 Interleave address generator
01/30/2003US20030022651 Method and devices for transmitting and receiving information
01/29/2003CN1394414A Communication system, communication control apparatus and method
01/28/2003US6513055 Apparatus and method for data width reduction in automotive systems
01/28/2003US6512472 Method and apparatus for optimizing dynamic range of a wideband analog-to-digital converter
01/23/2003US20030016157 Time domain radio transmission system
01/23/2003US20030016080 Apparatus for decoding receiving signal
01/22/2003EP1278339A1 Method and apparatus for communicating data from a first to a second data network
01/22/2003CN1393104A Signal transmitter and signal receiver
01/22/2003CN1099777C Digital signal encoding device, its decoding device, and encoding method
01/22/2003CN1099767C Method and device for compressing digital data
01/21/2003US6510182 Wireless infrared digital audio system
01/21/2003US6510180 Embedded software negotiation of PCM companding format
01/16/2003US20030014460 Analog filter
01/16/2003US20030012310 Receiver
01/15/2003EP0965123B1 A high resolution post processing method for a speech decoder
01/15/2003CN1391740A Method and apparatus for generating RF signal
01/15/2003CN1099097C Method for encoding digital audio signal
01/14/2003US6507299 Embedding supplemental data in an information signal
01/14/2003CA2275828C Using discrete message-oriented services to deliver short audio communications
01/09/2003WO2003003601A1 Method and apparatus for an optical cdma system
01/09/2003US20030006916 Bit-rate converting apparatus and method thereof
01/08/2003EP1274070A2 Bit-rate converting apparatus and method thereof
01/08/2003EP0892974B1 Method and arrangement for reconstruction of a received speech signal
01/07/2003US6505239 System for minimizing screen refresh time using selectable compression speeds
01/03/2003WO2003001710A2 Upstream communication system with controllable band pass filter properties
01/02/2003US20030002588 Method and apparatus for controlling buffer overflow in a communication system
01/02/2003US20030001769 Time domain radio transmission system
01/02/2003EP1271819A2 Transmission and reception of a first and a second main signal components
01/02/2003EP1038379A4 System, device and method for pcm upstream transmission utilizing an optimized transmit constellation
01/01/2003CN1388965A Audio signal compression
01/01/2003CN1388964A Audio signal processing with adaptive noise-shaping modulation
01/01/2003CN1388903A Method, system and apparatus for calibrating a pulse position modulation (PPM) decoder to a PPM signal
01/01/2003CN1388654A Digital pulse interval-modulated power line carrier communication method and its transceiving method
12/2002
12/31/2002US6502069 Method and a device for coding audio signals and a method and a device for decoding a bit stream
12/31/2002US6502068 Multipulse search processing method and speech coding apparatus
12/31/2002US6501802 Digital silence for a PCM data communication system
12/26/2002US20020196768 Code division multiple access mobile communication system
12/25/2002CN1387131A Predictive parameter analyzing device and method
12/24/2002US6499010 Perceptual audio coder bit allocation scheme providing improved perceptual quality consistency
12/24/2002US6498833 Channel check test system
12/19/2002WO2002065894A8 Endocardial pressure measurement
12/18/2002EP0663093B1 Improved preprocessing and postprocessing for vector quantization
12/18/2002CN1386332A Coding a data stream
12/18/2002CN1386329A Coding a data stream
12/12/2002US20020186792 Signal encoding for transmission of multiple digital signals over single physical medium
12/10/2002CA2118355C Orthogonal polarization and time varying offsetting of signals for digital data transmission or reception
12/05/2002WO2002098156A1 A method for enabling a subscriber entity to actively communicate in a communication network
12/05/2002US20020184008 Prediction parameter analysis apparatus and a prediction parameter analysis method
12/05/2002US20020184005 Speech coding system
12/04/2002EP1262027A1 Method of differential coding and modulation
12/03/2002US6490406 Recording and reproducing an MPEG information signal on/from a record carrier
12/03/2002US6489908 Wireless local loop terminal and system having high speed, high resolution, digital-to-analog converter with off-line sigma-delta conversion and storage
11/2002
11/28/2002US20020176486 Spread spectrum transmission apparatus, spread spectrum reception apparatus, and spread spectrum communication system
11/27/2002EP1261161A1 Error correcting communication method and communication apparatus to which this communication method is applied
11/27/2002EP1260967A2 Prediction parameter analysis apparatus and a prediction parameter analysis method
11/27/2002EP1260049A2 A modulation scheme for fdd/tdd transceivers
11/27/2002EP1260039A2 Application of digital processing scheme for enhanced cable television network performance
11/27/2002EP1259965A1 Sampling system with optimized sampling rate
11/27/2002EP0786172B1 Transmission system, transmitter, receiver and transmission method
11/27/2002CN1095254C Ultrawide-band communications system and method
11/27/2002CN1095253C Encoding and decoding apparatus and method of wideband digital information signal
11/26/2002US6487573 Multi-rate digital filter for audio sample-rate conversion
11/26/2002US6487535 Multi-channel audio encoder
11/21/2002WO2001020786A9 Group chain reaction encoder with variable number of associated input data for each output group code
11/21/2002US20020173954 Adaptive media encoding and decoding equipment
11/21/2002US20020173949 Speech coding system
11/21/2002US20020173282 Wireless user terminal and system having high speed, high resolution, digital-to analog converter with off-line sigma delta conversion and storage
11/21/2002US20020171571 PC card and wlan system having high speed, high resolution, digital-to analog converter with off-line sigma delta conversion and storage
11/20/2002EP1258091A1 METHOD AND APPARATUS FOR ACHIEVING 180o PHASE INVARIANT TRANSMISSION IN A PCM MODEM SYSTEM
11/20/2002CN1380655A Method and device for processing digital signal
11/14/2002WO2002091588A1 Sub-band adaptive differential pulse code modulation/encoding apparatus, sub-band adaptive differential pulse code modulation/encoding method, wireless transmission system, sub-band adaptive differential pulse code modulation/decoding apparatus, sub-band adaptive differential pulse code modulation/decoding method, and wirel
11/14/2002WO2002065458A3 Method and apparatus for interoperability between voice transmission systems during speech inactivity
11/14/2002US20020169599 Digital audio compression and expansion circuit
11/13/2002EP1257104A2 Heirarchical transmission with multicarrier modulation and error correction coding
11/13/2002EP1257063A2 PC card and wlan system having high speed, high resolution, digital-to -analog converter with off-line sigma delta conversion and storage
11/13/2002EP1256195A1 System and method for adjusting pcm data frames for robbed bit signaling in a telephone network
11/13/2002EP1256111A1 Rate determination coding
11/12/2002US6480552 Soft output metrics generation for symbol detectors
11/12/2002US6480528 Automatic gain control for improved decoding of multi-carrier signal
11/12/2002CA2118915C Process for reducing frequency interlacing during acoustic or optical signal transmission and/or recording
11/07/2002US20020165631 Audio signal processing with adaptive noise-shaping modulation
11/07/2002US20020163972 Method of selecting a PCM modem signal constellation in relation to channel impairments
11/07/2002US20020163455 Audio signal compression
11/06/2002EP1255358A2 Wireless local loop terminal and system having high speed, high resolution, digital-to-analog converter with off-line sigma delta conversion and storage
1 ... 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 ... 73