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Patent Searching and Data


Matches 501 - 550 out of 9,840

Document Document Title
WO/1998/039882A1
Ultrashort pulse time hopping code-division-multiple-access (CDMA) and time-division-multiple-access (TDMA) RF, IR, and optical communications systems (20, 30) in the time-frequency domain (60) comprise a transmitter (20) including a sho...  
WO/1998/039768A1
A post-processing method for a speech decoder (1) which gives a decoded speech signal in the time domain in order to obtain high frequency resolution from a frequency spectrum having non-harmonic and noise deficiencies. The method compri...  
WO/1998/038752A1
A pulse amplitude modulated (PAM) mapper (36) includes a constellation matrix memory (40) string indicating of a plurality of different constellations. The constellations are used individually or together to support a plurality of differ...  
WO/1998/038766A1
A sample rate converter (200) is described for converting an input data stream including a plurality of input samples (X) at one sample rate to an output data stream including a plurality of output samples (Y) at another sample rate. The...  
WO/1998/038631A1
To accurately determine rate and voice activity in moderate-to-low signal-to-noise ratios (item 703) (SNRs) to maximize voice quality, system capacity and/or battery life, parameters from a noise suppression system are used as inputs to ...  
WO/1998/037544A1
The invention relates to a method for coding discrete time signals (x�1?) sampled at a first sampling rate. According to said method second time signals (x�2?) are generated using the first time signals, the band width of which corre...  
WO/1998/036577A1
A predictive coding method for a dynamic image having two types of prediction modes of global motion compensation and local motion compensation, wherein an unnecessary code word MCSEL is reduced as much as possible, even by one bit, thus...  
WO/1998/035341A2
In a speech decoder (40) a speech signal is represented by a plurality of prediction parameters updated once per frame. Each frame comprises a plurality of sub-frames in which the excitation signal generated by a fixed codebook (52) and ...  
WO/1998/035448A2
In a speech communication network in which a transmitter (1) transmits speech signals via a network (4) to a receiver (8), it can happen that more traffic is offered to the network (4) than it can handle. In order to reduce the network l...  
WO/1998/035450A2
Focused error correction and/or focused error detection is used in the information coding system according to the invention. The purpose of the present invention is to present a speech encoding method, in which the number of speech param...  
WO/1998/035447A2
A method of coding an audio electrical signal using backward adaptive prediction. A first time frame of the audio electrical signal to be coded is received and transformed into the frequency domain using a modified discrete cosine transf...  
WO/1998/028936A1
The present invention relates to detecting speech channel back-looping in a speech processing device in digital telecommunication systems. The detection is based on the speech samples from different transmitters being independent of one ...  
WO/1998/026519A1
A subchannel within a CDMA signal is provided together with a system for receiving and decoding this subchannel. A message is transmitted over the subchannel by applying a sequence of phase rotations to the user data. A single subchannel...  
WO/1998/020423A1
A system (100) for communicating digitally-encoded acoustic information across a computer network (120) between computers (110). The system includes a plurality of client computers (110) coupled together via a computer network (120). Eac...  
WO/1998/015945A1
Transform coefficients of audio signal samples are grouped into subbands. A predetermined number of subband bit allocation patterns (encoding categorizations), specifying parameters including quantization step size, dead zone, maximum bi...  
WO/1998/015946A1
Desired audio information intermittently present in a first audio signal is communicated over a communications medium by generating a first communications signal in the communications medium when the desired audio information is present ...  
WO/1998/013941A1
The mobile telephone detects bad data packets by decoding speech parameters represented by the packets and comparing those speech parameters against acceptable ranges of speech parameters. If the speech parameters do not lie within the a...  
WO/1998/011683A1
The present invention relates to arrangements and methods for radio frequency modulation and power amplification of an information signal (X�IF?). Modulation and amplification of the information signal (X�IF?) is carried out with ver...  
WO/1998/008329A1
A compensation system (figure 2A) for improving the accuracy of digital signals that are communicated through a digital network (113, figure 1) by reducing loss from attenuation quantization (DAQ) and rob bit signaling (RBS). The combine...  
WO/1998/008318A1
A cooperative feedback system (210) is provided for a compensation system associated with a transmitter or codec, for enabling the compensation system to improve the accuracy of digital signals transmitted to a digital network (113). The...  
WO1997050202A3  
WO/1998/003955A1
A digital data shuffling/deshuffling system which can prevent the decipherment of information data by an unspecified third person. The system is provided with a means which generates digital data of a plurality of bits to be transmitted,...  
WO/1998/003037A1
When coding and decoding stereophonic spectral values, both the intensity stereo process and a prediction process are used to achieve a high data compression. When an intensity stereo coding is active in a section composed of scaling fac...  
WO/1997/050202A2
A method and apparatus for communicating information with a user via electromagnetic radiation. The information can be communicated to or from an electronic device in accordance with a plurality of protocols to provide a plurality of ser...  
WO/1997/049216A1
An improved coding system (fig. 1) for digital compression applicable as a digital compression algorithm for increasing the bandwidth of telecommunications and broadcasting network. The system operates in the transmission regime, not in ...  
WO/1997/038416A1
The present invention relates to a method and an arrangement for reconstruction of a received speech signal (r), which has been transmitted over a radio channel that has been subjected to disturbances, such as e.g. noise, interference or...  
WO/1997/034404A1
An infrared communication system transfers secure communication signals between a source unit and a destination unit, while having low power comsumption in a wireless remote unit. The system comprises an audio processor (203), a scramble...  
WO1997025794A3  
WO/1997/031367A1
A speech compression system called "Transform Predictive Coding" or TPC, provides encoding for 7 kHz band speech at 16 kHz sampling at a target bit-rate of 16 or 32 kb/s one or two bits per sample. The system uses short and long term pre...  
WO/1997/027681A1
A self initialized coder and method thereof, the coder arranged and constructed for decoding an information stream (217), the coder including a buffer (301) for storing a portion (403) of the information stream, a controller (313) couple...  
WO/1997/025794A2
A transmitter provided with a subband coder is disclosed. The transmitter receives a wideband digital information at an input (1) and provides an output signal for transmission at an output (30). The input signal may have a varying sampl...  
WO/1997/023971A1
In a transmission system a sequence of digital symbols comprising concatenated words, is transmitted by a transmitter (2) via a transmission medium (14) to a receiver (16). In order to reduce the transmission capacity no word synchronisi...  
WO/1997/021211A1
A subband audio coder (12) employs perfect/non-perfect reconstruction filters (34), predictive/non-predictive subband encoding (72), transient analysis (106), and psycho-acoustic/minimum mean-square-error (mmse) bit allocation (30) over ...  
WO/1997/016009A1
A device for communication between a digital adapter (5) connected to an exchange (4) via a digital interface (7), particularly an ISDN interface, and an analog adapter (6) connected to an exchange (3) via an analog interface (8). Said e...  
WO/1997/015984A1
An encoding apparatus is provided for encoding a wideband digital signal, comprising an input (1) for receiving the wideband digital signal, a splitter unit (3) for splitting the wideband digital signal into a number of M sub-signals and...  
WO/1997/016008A1
A device for communication between a digital adapter (5) connected to an exchange (4) via a digital interface (7), particularly an ISDN interface, and an analog adapter (6) connected to an exchange (3) via an analog interface (8). Said e...  
WO/1997/015983A1
The method and the apparatus allow coding, manipulation and decoding of audio signals independently of the specific signal content. An encoder (AC) carries out an object-oriented coding and generates a coded signal, with variable bit rat...  
WO/1997/014139A1
A method and a device for predicting periodicity data present in a voice signal to be coded that is subdivided into a series of sub-frames. The prediction is performed using an adaptive dictionary built up from the optimal excitation of ...  
WO/1997/011535A1
A method and apparatus for selecting an error correction code rate in a cellular radio system. Each base station broadcasts a power product value, PP, which is its transmit power, PBT, multiplied by its desired receive power, PBR. A mobi...  
WO/1997/010584A1
An apparatus and method for processing a voice message to provide low bit rate speech transmission processes the voice message to generate speech parameters which are arranged into a two dimensional parameter matrix (502) including a seq...  
WO/1997/005602A1
The present invention teaches of a method of encoding linear predictive coefficient data. The present invention transforms the linear predictive coefficient data into line spectral cosine data (103). The line spectral cosine data is used...  
WO/1997/004621A1
The invention concerns a process for reducing redundancy during the coding of multichannel signals, the digital signals being predicted. A prediction error is determined which is then quantized and prepared for transmission via a transmi...  
WO/1997/003502A1
Known is a digital transmission system in which bit groups of a digitized analog signal are converted into corresponding analog signals before serial transmission in the form of a series of PAM-signals. At receiver side, an analog signal...  
WO/1997/002561A1
The invention relates to a method for mutual synchronization of the transmitter's speech encoder and the receiver's speech decoder in a communication system utilizing discontinuous transmitter between the transmitter and the receiver. Th...  
WO1996037048A3  
WO/1996/042137A1
A pulse position modulation detector divides a timing window (205) into a plurality of pulse position windows (210), determines the peak magnitude of a signal level (360) received during each pulse position window (210), compares the pea...  
WO/1996/041432A1
A receiver for acquisition and lock of an impulse radio signal comprising an adjustable time base to output a sliding periodic timing signal having an adjustable repetition rate, and a decode timing modulator to output a decode signal in...  
WO/1996/037048A2
In a method of lossless processing of an integer value signal in a prediction filter which includes a quantiser, a numerator of the prediction filter is implemented prior to the quantiser and a denominator of the prediction filter is imp...  
WO/1996/035269A1
Data representing an information signal are non-linearly quantized to generate respective quantized data that represent the information signal using fewer bits. Each of the data, when non-linearly quantized, is represented by a quantizin...  
WO/1996/034462A1
An impulse radio transceiver for full duplex ultrawide-band communications. The transceiver comprises an impulse radio transmitter to transmit impulse radio signal pulses, an impulse radio receiver to receive impulse radio signal pulses,...  

Matches 501 - 550 out of 9,840