Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 551 - 600 out of 9,840

Document Document Title
WO/1996/034465A1
The invention concerns a device comprising: a voltage/frequency converter (3 to 7) which receives the input voltage and emits pulses of a frequency proportional to this voltage; an electro-optical converter (8) which transforms the elect...  
WO1996029800A3  
WO/1996/031881A1
A data transmission apparatus for transmitting an original data has a converter for converting the original data to sequential data codes. The data code is formed by a combination of HIGH level binary codes and LOW level binary codes. Th...  
WO/1996/029800A2
A method and apparatus for detecting and indicating a collision on a wireless channel are provided. According to the method, data is transmitted over the wireless channel using pulse position modulation. The channel is monitored during e...  
WO/1996/029789A1
To monitor the transmission quality of digitised signals, the quantisation disturbance power is measured in a range in which no useful signals are transmitted. It is possible from the quantisation disturbance power to obtain the quantisa...  
WO/1996/028896A1
Data, as may be employed in telecommunications, is segmented into blocks (A), each block having associated therewith a metric of distortion (B) as a function of the number of bits in the block to represent the quality of the data contain...  
WO1996025809A1
In a quantization noise reduction circuit (200), a feedback signal (W) is added to an input signal (X) to the quantization circuit to reduce quantization noise. The feedback signal is generated as a filtered difference between a sample o...  
WO/1996/023297A1
A first remote vocoder (15) receives analog voice (170) and produces packetized vocoder data (190) which is transmitted over a wireless link (20). A first local vocoder (35) receives the packetized vocoder data (190) from the wireless li...  
WO1996011531A3
In a transmission system for transmitting speech and music signals, an input signal is coded in a coder (11) by a time domain coder (4). The output signal of the time domain coder (4) is decoded by a time domain decoder (8) and the signa...  
WO/1996/022637A1
The invention relates to a signal processing method for a block-coded audio signal in an audio information transmission system with the steps: a) intermediate storage of each signal block properly transmitted; b) detection of an incorrec...  
WO/1996/021975A1
A method and apparatus is disclosed for determining a masked threshold curve as a function of frequency from an information signal. The method comprises a first step of determining for each frequency value a first masking component MC(1,...  
WO/1996/018244A1
A site controller (102) instructs a transcoder (121) to operate in a partial transcoding mode (401). While in the partial transcoding mode, the transcoder continuously monitors for a synchronization pattern. If the synchronisation patter...  
WO/1996/017449A1
Input data signals inputted to a data input terminal (1) are supplied to an FIR digital filter (4) having a low-pass characteristic through a memory (2). The memory (2) is controlled by a control circuit (6), and the data immediately bef...  
WO/1996/014695A1
The invention concerns a method and an apparatus for encoding a wideband digital information signal. The apparatus comprises a signal splitting unit (2) for splitting the signal into M narrowband subsignals (SB1 to SBM). A scale factor i...  
WO1996003820A3  
WO/1996/011531A2
In a transmission system for transmitting speech and music signals, an input signal is coded in a coder (11) by a time domain coder (4). The output signal of the time domain coder (4) is decoded by a time domain decoder (8) and the signa...  
WO/1996/009700A1
A method and apparatus for mitigating error in a received communications signal includes an error mitigator (35) of a communication unit (12) which receives and performs mitigation based on an error indication. In a first embodiment, the...  
WO/1996/009694A1
An impulse radio communications system using one or more subcarriers to communicate information from an impulse radio transmitter (901) to an impulse radio receiver (1400). The use of subcarriers provides impulse radio transmissions adde...  
WO/1996/008115A1
A method of transmitting timing critical data via an asynchronous channel. The timing critical data can be an MPEG transport stream of packets. The asynchronous channel can be a computer or telephone network, a digital storage media such...  
WO/1996/004653A1
In order to improve the transmission quality of block-coded audio signals in audio communications systems (e.g. in DECT cordless telephones) when transmission errors occur, with a view to reducing to a minimum the computer processing eff...  
WO/1996/003820A2
A method of, and system for, communicating messages in an environment which is subject to fading, in which data to be transmitted is encoded and formatted, a checksum (CSM) is determined for said encoded and formatted data and in which t...  
WO/1996/002091A1
The invention relates to a method and apparatus for speech transmission in a telecommunications system in which a speech signal is compressed to a small number of speech coding bits by a speech coding method, and the speech coding bits a...  
WO/1996/001527A1
A circuit for applying a predetermined algorithm to an input signal, comprises an input for receiving the input signal, a signal processing device for processing the input signal in accordance with the predetermined algorithm, and a devi...  
WO/1995/032556A1
The arrangement for determining a signal spectrum of a wideband digital audio signal in an adaptive bit allocation system, comprises signal splitting means (2) for splitting the wideband digital audio signal into M narrow band sub signal...  
WO1995027977A3  
WO1995027978A3  
WO/1995/030282A1
In a digital radio communication system in which information is transmitted and received in time slots and some bits of each received audio frame is interleaved over at least two time slots and other bits in each audio frame are non-inte...  
WO/1995/029541A1
Apparatus for determining a complexity measure of a data signal is disclosed which includes an encoder (14), having an input terminal (5) responsive to a data input signal (DATA IN) and a data output terminal producing a coded output sig...  
WO/1995/029540A1
Apparatus for sampling a signal parameter of a plurality of data signals is disclosed which comprises a plurality of sources (5) of data signals. Each data signal includes sequential groups of data. Each group of data in all of the data ...  
WO/1995/027977A2
A method of transmitting timing critical data via an asynchronous channel without changing any datum to be transmitted. The timing critical data can be an MPEG transport stream. The asynchronous channel can be a computer or telephone net...  
WO/1995/027978A2
During recording of an MPEG information signal on a record carrier (40), transport packets (Pk) are stored in signal blocks in a track (1) on the record carrier (40). x transport packets of the MPEG information signal are stored in the s...  
WO/1995/026083A1
In a process for coding a plurality of audio signals, the left and right-hand basic channels and the central channel are formed into a jointly coded signal by joint stereo coding which is decoded to provide simulated decoded signals. The...  
WO/1995/023461A1
The wireless communication system, comprising a transmitter and a receiver, operates according to the present PPM-FSK modulation format with two subcarrier frequencies f1 and f2. The PPM encoded data on the main data channel (43) are fed...  
WO/1995/022859A1
An apparatus and method for communicating data between at least two data devices, suitable for use as a wireless local-area network, that provides robust data communication via a radio communication channel corrupted by multipath interfe...  
WO/1995/022858A1
In a process for the cascade coding and decoding of audio data, the spectral components of the relevant short-time spectrum are formed for a data block with a given number of time input data, the coded signal is formed on the basis of th...  
WO/1995/019072A1
The present invention provides a transcoder (400) for transcoding of digitally encoded bit streams produced by predictive encoders. The transcoder of this invention is less complex than previously known transcoders in terms of both compu...  
WO/1995/018494A1
A data frame structure for variable size data constellations includes repetitive data segments each containing a fixed number of symbols arranged as a data segment sync character and data bytes. The frame includes a header segment includ...  
WO/1995/017049A1
A transmission system includes transmit and receive paths coupled via a hybrid circuit (16) to a bidirectional transmission path (18). The transmit path includes a DAC (14) having a given rang and precision. The transmit path signal is l...  
WO/1995/016315A1
In a TDMA cellular telephone system, an error concealment method provides parameter interpolation based on soft quality measures that will enhance the speech quality under bad channel conditions compared to prior methods of repeating pre...  
WO/1995/016333A1
A multi-channel signal compressor for compressing digital sound signals in the respective channels of a multi-channel sound system. The apparatus comprises a first-stage compression system and a second-stage compression system. In the fi...  
WO/1995/013660A1
When a time region sample or a frequency region sample of input signals such as audio signals is quantized, the present invention executes block floating processing of MDCT coefficient as a frequency region sample, for example, then exec...  
WO/1995/012943A1
A communication system for transmitting variable rate data is disclosed wherein redundancy is added to the variable rate data to provide repetition symbols. The repetition symbol data is transmitted with symbol energy scaled in accordanc...  
WO/1995/012939A1
A method of pulse-position modulation in a spread-spectrum communication system which is capable of transmitting more than one bit per received and recognized chip sequence in a system in which an entire chip sequence is required to prod...  
WO/1995/012254A1
A transmitter for transmitting at least a first and a second main signal component (L+R) is disclosed, having at least two input terminals (1, 90) for receiving the at least two input signals. The transmitter comprises multiplexer means ...  
WO/1995/010890A1
In a transmission system for transmitting speech and music signals, an input signal is split up into two spectral portions in a coder. These spectral portions are coded each by its own sub-coder. The transmission quality may be improved ...  
WO/1995/010885A1
A method and apparatus for demodulating a pulse width modulated (PWM) signal previously modulated with either a first or second data value comprises sensing an actual duration of the first period of the bit cell, and generating an actual...  
WO1995008241A3  
WO/1995/008877A1
The invention relates to a transcoding and transdecoding unit in a digital mobile radio system, and to methods for adjusting their output signals. The unit comprises an expander unit (ED) for converting companded digital data (SD1) into ...  
WO/1995/008241A2
A speech encoder converts analog speech signals into a stream of binary coded speech samples. A circuit for performing analog to digital conversion compares an input speech signal with a signal from a digital integrator. Based on the com...  
WO/1995/008152A1
A communication system implements detection of bad frames of information by utilizing multiple bit correction thresholds. Equipment used within the communication system adapts to different signaling environments by dynamically altering t...  

Matches 551 - 600 out of 9,840