Patents
Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274)
12/2001
12/12/2001CN1326269A Transmitting system for carrying different encoding principles
12/11/2001US6330247 Communication protocol between a communication device and an external accessory
12/11/2001US6329937 Robust data communications using multiple spectral images
12/06/2001WO2001093467A1 Analog-to-digital converter infidelity estimation and correction system for a pcm modem system
12/06/2001WO2001052411A3 Generating coefficients for a prediction filter in an encoder
12/05/2001EP0669026B1 Method and apparatus for erasing bad frames of information in a communication system
12/05/2001CN1325604A Method and arrangement for optimal scheduling of slotted mode related measurements in a cellular radio system
12/04/2001US6327562 Method and device for coding an audio signal by “forward” and “backward” LPC analysis
11/2001
11/29/2001US20010045901 Optimized sampling rate
11/28/2001EP1157475A1 DISTINGUISHING RECEIVED A-LAW AND $g(m)-LAW SIGNALS IN A PCM MODEM
11/28/2001EP1157375A1 Celp transcoding
11/28/2001CN1324513A Apparatus for performing a non-integer sampling rate change in a multichannel polyphase filter
11/28/2001CN1324204A Variable-speed data circuit multiplex device having direct linkage passage function
11/27/2001US6324260 Channel check test system
11/22/2001US20010043655 Method and device for adaptive differential pulse code modulation
11/20/2001US6320520 Information additive group code generator and decoder for communications systems
11/15/2001US20010040702 Apparatus and method for supporting analog fax calls in a tandem configuration
11/14/2001EP1154608A2 Multiresolution receiver
11/14/2001EP1153489A1 Constellation design for a pcm modem
11/14/2001CN1074846C Method for generating spectral noise weighting filter for use in speech coder
11/13/2001US6317457 Pulse density modulator
11/13/2001CA2229240C Lsp prediction coding utilizing a predetermined best prediction matrix based upon past frame information
11/08/2001WO2001020892A3 A method for transmitting data between respective first and second modems in a telecommunications system, and a telecommunications system
11/08/2001US20010039638 Turbodecoding method with re-encoding of erroneous information and feedback
11/07/2001EP1152542A1 Turbodecoding method with re-encoding of erroneous information and feedback
11/07/2001EP1151545A1 Communication protocol between a communication device and an external accessory
11/07/2001CN1321008A System and method for reducing voice delay and improving voice quality using semi-voice block
11/01/2001WO2001082489A1 Multiplexing-interleaving and demultiplexing-deinterleaving
10/2001
10/31/2001EP1074088B1 Method for converting the sampling rate
10/31/2001CN1319974A Improved method for decode uplink state mark
10/30/2001US6310906 Chaotic carrier pulse position modulation communication system and method
10/30/2001CA2221910C System and method for spread spectrum code position modulation and wireless local area network employing the same
10/25/2001US20010033621 Method of differential coding and modulation
10/25/2001US20010033616 Generating coefficients for a prediction filter in an encoder
10/24/2001EP1147613A1 Method for transmitting source encoded digital signals
10/24/2001CN1319276A Variable order SIGMA-DELTA modulator
10/24/2001CN1319229A Portable information terminal, method of processing audio data, recording medium, and program
10/24/2001CN1318918A Orthogonal frequency-division multiplex transmitting apparatus and method
10/18/2001US20010030940 Method and apparatus for digital channelisation and de-channelisation
10/17/2001EP1146679A2 Variable bit rate digital circuit multiplication equipment with tandem passthrough function
10/17/2001EP1145222A2 Speech coding with comfort noise variability feature for increased fidelity
10/17/2001CN2454991Y Multi-element coding-decoding telecontrol device
10/17/2001CN1317889A 接收装置 Receiver
10/16/2001US6304623 Precision timing generator system and method
10/13/2001CA2307473A1 The tachyon transceiver
10/11/2001US20010029450 Variable bit rate digital circuit multiplication equipment with tandem passthrough function
10/11/2001US20010028684 Multilevel coding with unequal error protection and time diversity for bandwidth efficient transmission
10/10/2001EP1143678A2 Synchronisation in a multicarrier broadcast receiver
10/10/2001EP1143653A2 Multilevel coding with unequal error protection and time diversity for bandwidth efficient transmission
10/10/2001EP1142170A1 Method and apparatus for interleaving in a communication system
10/10/2001CN1317169A Digital reception with radio frequency sampling
10/09/2001CA2199760C A transmission system for digital audio broadcasting
10/04/2001WO2001024549A3 Voice over pcm technique providing compatibility between pcm data and lower rate vocoder data
10/04/2001EP1139689A2 Hand-off processing apparatus and method for telecommunication system
10/04/2001EP1139614A1 Improved method of decoding uplink status flags for RT-EGPRS users
10/04/2001EP1139289A2 Improved vector quantization
10/03/2001CN1316129A Control of variable gain amplifier with delta sigma modulator D/A converter
10/03/2001CN1072417C Direct phase digitizing apparatus and method
10/02/2001US6298091 Method to play audio and video clips through MPEG decoders
10/02/2001US6297755 Analog isolation system with digital communication across a capacitive barrier
09/2001
09/28/2001CA2337709A1 Improved method of decoding uplink status flags for rt-egprs users
09/27/2001US20010025242 Error concealment method with pitch change detection
09/26/2001EP1135909A1 Systems and methods for receiving a modulated signal containing encoded and unencoded bits using multi-pass demodulation
09/26/2001EP1135871A1 Demultiplexer for channel interleaving
09/26/2001EP1025646B1 Methods and devices for encoding audio signals and methods and devices for decoding a bit stream
09/26/2001EP0707761B1 Arrangement for determining a signal spectrum of a wideband digital signal and for deriving bit allocation information in response thereto
09/25/2001US6295316 Automatic equalization system
09/20/2001WO2001069794A1 Interleave address generator
09/19/2001EP1134926A2 Variable encoding levels for encoding of in-band control messages in wireless telecommunication systems
09/19/2001EP0864146A4 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation
09/18/2001US6292777 Phase quantization method and apparatus
09/18/2001US6292477 Code division multiple access mobile communication system
09/13/2001WO2001067618A1 Method and apparatus for decoding
09/12/2001EP1132891A1 Voice encoder, voice decoder, and voice encoding and decoding method
09/12/2001EP1131972A1 Method and arrangement for optimal scheduling of slotted-mode related measurements in a cellular radio system
09/12/2001CN1312987A Method and system for digital channelisation and de-channelisation
09/12/2001CN1312977A Scalable audio coder and decoder
09/12/2001CN1312976A System and method of masking quantization noise of audio signals
09/12/2001CN1312974A System and method for entropy ercoding quantized transform coefficients of a sigral
09/11/2001US6289311 Sound synthesizing method and apparatus, and sound band expanding method and apparatus
09/11/2001CA2331611C Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation
09/07/2001WO2001065732A2 Application of digital processing scheme for enhanced cable television network performance
09/07/2001WO2001065702A2 A modulation scheme for fdd/tdd transceivers
09/07/2001WO2001041314A8 Method and arrangement for implementing intra-frame interleaving
09/07/2001WO2000048170A9 Celp transcoding
09/07/2001CA2400150A1 Application of digital processing scheme for enhanced cable television network performance
09/05/2001EP1130838A2 Transmission rate matching apparatus and method thereof for next generation mobile communication system
09/05/2001CN1070666C Clock recovery circuit and method
09/04/2001US6285888 Mobile telephone arranged to receive and transmit digital data samples of encoded speech
08/2001
08/30/2001US20010017901 Transmission rate matching apparatus and method for next generation mobile communication system
08/29/2001EP0962015B1 Method and devices for coding discrete signals or for decoding coded discrete signals
08/29/2001CN1070322C Method and arrangement for transmitting speech signals
08/28/2001US6281988 Apparatus and method for supporting analog fax calls in a tandem configuration
08/23/2001US20010016817 CELP-based to CELP-based vocoder packet translation
08/23/2001US20010016052 Method for encoding bits in a signal
08/22/2001EP1125363A1 Apparatus for performing a non-integer sampling rate change in a multichannel polyphase filter
08/22/2001EP1125286A1 Perceptual weighting device and method for efficient coding of wideband signals
08/22/2001EP1125285A1 Periodicity enhancement in decoding wideband signals
08/22/2001EP1125284A1 High frequency content recovering method and device for over-sampled synthesized wideband signal
08/22/2001EP1125282A1 Transmission system with improved encoder and decoder
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