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WO/2000/028680A1 |
The present invention relates to a computer device which is aligned with a radio transceiver and comprises a memory into which data consisting of a formatted information block is introduced, said block being assigned a personal code afte...
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WO/2000/028688A1 |
In a modulation method in which a sender device expresses a symbol such as an 8PSK or a 16PSK by using three or more bits, important information is arranged at least at only one of the first and second bits, a receiver device extracts th...
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WO/2000/028761A1 |
The timing of frames associated with a certain first communication connection (301) and allocated for measurement and reception of signalling (302, 303) external to said first communication connection is defined in a cellular radio syste...
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WO/2000/027058A1 |
A codec (42) supports PCM modem communications (e.g., V.90, X2, or K56flex protocols) over a universal digital loop carrier (UDLC) having an analog interface to the central office (CO) (13). The codec includes an analog-to-digital conver...
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WO/2000/026908A1 |
An arrangement for embedding supplemental data (e.g. a watermark W) in an information signal (x). In an embodiment of the invention, the arrangement comprises a conventional sigma-delta modulator (20) for encoding an audio signal (x) and...
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WO/2000/025304A1 |
A perceptual weighting device for producing a perceptually weighted signal in response to a wideband signal comprises a signal preemphasis filter, a synthesis filter claculator, and a perceptual weighting filter. The signal preemphasis f...
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WO/2000/025302A1 |
When the pitch of a sub-frame to which differential quantization is not applied is preliminary selected, a specialized pitch for the sub-frame to which differential quantization is not applied is not outputted as a preliminary selection ...
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WO/2000/025298A1 |
An improved pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and ...
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WO/2000/025305A1 |
In a method and device for recovering the high frequency content of a wideband signal previously down-sampled during encoding, and for injecting, during decoding, this high frequency content in an over-sampled synthesized version of the ...
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WO/2000/025303A1 |
The present invention relates to a method and device for enhancing periodicity of an excitation signal produced in relation to a pitch codevector and an innovative codevector for supplying a signal synthesis filter in view of producing a...
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WO/2000/024122A1 |
A multichannel polyphase filter (304, 602) includes a processing system (204, 506) for accepting and processing M input channels of data, each sampled at an input sampling rate, wherein M is a positive integer greater than unity. The pro...
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WO/2000/022735A1 |
A radio receiver comprises an input (10) coupled to first and second quadrature related low-IF frequency translation stages (20, 21) generating IF signals at substantially half the channel bandwidth or channel spacing. The IF signals whi...
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WO/2000/019654A1 |
The present invention seeks to enhance the modified fast convolution algorithm in order to increase the flexibility of the algorithm. In an exemplary embodiment of the present invention, a folding unit is introduced as a pre-processing s...
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WO/2000/018046A1 |
In a system in which an auxiliary data signal is conveyed with a decoded audio signal to assist in re-encoding, signature information is provided to assist in detecting changes in the decoded audio signal which would render the auxiliary...
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WO/2000/014910A1 |
A precision timing generator system suitable for ultra wide band (uwb) communications. A frame reference signal is produced as a function of a clock signal. A first timing generator generates a coarse timing signal having a nominal perio...
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WO/2000/008633A1 |
An MA adaptive code vector is generated by using a finite number of noise code vectors used in the past, an adaptive code book gain, and a pitch period, and the amount of phase shift is calculated from the MA adaptive code vector, thereb...
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WO/2000/008764A1 |
A radio frequency signal is received by using a sigma-delta analog-to-digital converter to sample the radio frequency signal at a sampling rate and to generate therefrom 1-bit digital samples representing a digital intermediate frequency...
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WO/2000/003385A1 |
A voice encoding device capable of providing an excellent tone quality even at a low bit rate, wherein a mode discrimination circuit (800) discriminates, for each sub-frame, a mode from an input voice signal by using a characteristic qua...
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WO/2000/001076A1 |
A message in the form of a sequence of bits is encoded into non-binary signals. The encoder (401) encodes the message into a vector as the first half of the eventual encoded vector, and append the negation of the encoded vector to the en...
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WO/2000/001072A1 |
In the illustrative embodiment, the inventive system includes a low-bit digital-to-analog converter (68) for converting a first signal at a reference frequency to a digital signal. A delta-sigma converter is included for suppressing nois...
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WO/1999/065172A1 |
The present invention relates generally to the problem of filtering, decimation or interpolation and frequency conversion in the digital domain, and more particularly to its use in wideband multichannel receiver, channelisation, and tran...
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WO/1999/063500A1 |
A system for communicating with plural remote transmitters in which the transmitters send messages without a common synchronization source or polling by a controlling receiver. In one embodiment, the system uses the time position of freq...
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WO/1999/063661A1 |
Apparatus, and an associated method, for generating a gain control signal for controlling operation of a variable gain amplifier. Gain control circuitry includes a delta sigma modulator which exhibits a noise transfer function for shifti...
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WO/1999/063501A1 |
A system and method in which multiple remote transmitters communicate asynchronously with one or more receiving stations. The transmitters are low cost units which use inexpensive timing circuits to generate a pulse position encoded chir...
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WO/1999/062052A2 |
A system and method for processing an audio signal and including a scalable audio coder (500) and a decoder. The coder (500) includes a multi-resolution transform processor (510), such as a modulated lapped transform (MLT) transform proc...
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WO/1999/062189A2 |
A system and method for processing an audio signal and including a scalable audio coder (300) and a decoder. The coder (300) includes a multi-resolution transform processor (310), such as a modulated lapped transform (MLT) transform proc...
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WO/1999/062055A1 |
A sound decoder (10) has a decoding unit (11) and an amplification control unit (12). The decoding unit (11) decodes a received coded sound signal (bit stream) BS and outputs a decoded sound signal SP. The amplification control unit (12)...
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WO/1999/062253A2 |
A system and method for processing an audio signal and including a scalable audio coder (300) and a decoder. The coder (300) includes a multi-resolution transform processor (310), such as a modulated lapped transform (MLT) transform proc...
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WO/1999/054997A1 |
The invention relates to a method for converting the scanning rate during the transfer of a scanned signal from a first system (SYS 1) with a first scanning rate (f1) to a second system (SYS 2) with a second scanning rate (f2). According...
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WO/1999/055011A1 |
A device and method for performing channel encoding using a frame structure having a termination effect in a recursive systemic encoder for a communication system. The channel encoding device having: an inserter for inserting at least on...
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WO/1999/052216A2 |
There are provided channel encoding/decoding device and method to efficiently transmit/receive voice and data. Data with a low data rate or a short data frame is convolutionally encoded and data with a high data rate or a long data frame...
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WO/1999/048214A2 |
A transmitter is disclosed for transmitting a digital information signal via a transmission medium. The digital information signal can be divided into one or more sub-signals. Each sub-signal is transmitted as a non-encoded or as an enco...
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WO/1999/046914A2 |
A communication device (100) is provided having a speech encoder (103) and a speech decoder (110) and being able to retrieve and store voice messages in a memory (116). The messages are stored in the memory according to a message format....
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WO/1999/041865A1 |
There are provided selecting means (14) for selecting data on a specified point from data on N points outputted from Fourier transformation means (13) and an output order data generating means (15) for generating data for specifying the ...
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WO/1999/040688A1 |
An analog signal (111) is sampled and digitized at a rate higher than the Nyquist rate for a standard-bandwidth public switched-network telephone line, then transmitted (via a modem) over the standard (113) line (122) to a receiving loca...
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WO/1999/039465A1 |
A method of transmitting a quiet, or zero, signal in a PCM communication system. The zero signal is specified universally in ordered set terms for either $g(m)-Law or A-Law PCM systems, which has minimal energy in the A-Law system, and c...
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WO1999020016B1 |
A technique for maintaining a predefined transmission quality in a wireless Metropolitan Area Network (MAN). Each of a plurality of Local Area Networks are coupled to a corresponding router. Each router is coupled to one or more transcei...
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WO/1999/034354A1 |
In a sound encoding/decoding process, a sound signal is subjected to compression encoding and converted into a digital signal, and a high quality sound is reproduced from a little amount of information. In a code excited linear predictio...
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WO/1999/034565A1 |
A device and method for precoding data signals for pulse code modulation (PCM) transmission including a transmitter (52) for transmitting a sequence of analog levels over analog channel to a quantization device, wherein the analog channe...
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WO/1999/034566A1 |
A transmitter in an analog pulse code modulation (PCM) modem (12) which transmits analog levels over an analog channel (18) to produce constellation points at a quantization device (26), wherein the constellation points correspond to gro...
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WO/1999/034504A1 |
A device an method for detecting digital impairments affecting an upstream pulse code modulation (PCM) channel in a digital communication network (36), involves: receiving, by a digital PCM modem (38) interconnected to the digital commun...
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WO/1999/033050A2 |
An audio equivalent input signal is divided into a sequence of overlapping or adjacent signal segments. A lengthened signal is synthesised by systematically maintaining or repeating respective signal segments of the sequence of segments....
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WO/1999/031807A1 |
A $g(S)$g(D) modulator-controlled, phase-locked-loop circuit (10), and an associated method, generates a frequency-regulated signal (26) which does not exhibit undesired tones. Dithering signals (46) are generated and are provided to a $...
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WO/1999/026130A1 |
A system is provided for the remote control of one computer from another in which selectable compression speeds are utilized to minimize overall screen refresh time. In one embodiment, an algorithm selection module at one computer choose...
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WO/1999/022561A2 |
Speech is received as a sequence of segments that are coded according to an LPC principle. The segments are reproduced for concatenated read-out in audio reproduction, by exciting an all-pole filter with recurrent signals in case of voic...
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WO/1999/022451A2 |
The invention makes it possible to combine a scaleable audio coder with TNS technology. According to the inventive method for encoding time signals (x¿1?) sampled in a first sampling rate, second time signals (x¿2?) with a sampling rat...
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WO/1999/021189A1 |
Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are partic...
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WO/1999/021371A1 |
Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are partic...
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WO/1999/021167A1 |
A method and apparatus for smooth transitions of background noise as a mobile communication unit roams from a first communication system having a first speech encoder (310) to a second communication system having a second speech encoder ...
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WO/1999/021188A1 |
Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are partic...
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