|
Match
|
Document |
Document Title |
|
|
7580832 |
Apparatus and method for robust classification of audio signals, and method for establishing and operating an audio-signal database, as well as computer program
An apparatus for producing a fingerprint signal from an audio signal includes a means for calculating energy values for frequency bands of segments of the audio signal which are successive in time,...
|
|
|
7532671 |
Gain control method and apparatus
An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses...
|
|
|
7499509 |
Receiver for compensating nonlinearly distorted multicarrier signals
An apparatus for compensating nonlinearly distorted multicarrier signals, a multicarrier signal receiver using the same, and a method therefor are provided, where the apparatus for compensating...
|
|
|
7406157 |
Methods and apparatuses for determining loop characteristics using an extended voice-band modem
Embodiments of the invention provide methods for determining the characteristics of a local loop using the multi-carrier tones of a DSL activation process. For one embodiment, one or more sets of...
|
|
|
7391813 |
Digital wireless communications device
A digital wireless communications device enabling call distance to be increased while avoiding mute processing as far as possible, even if code error occurs in an ADPCM code. The digital wireless...
|
|
|
7376189 |
Remote control signal reception circuit, remote control signal reception method, remote control signal reception program, and computer-readable storage medium storing the program
The subject invention provides a remote control signal reception circuit that carries out quantization of an input data signal 101 by sampling the signal with a first sampling frequency that is...
|
|
|
7346113 |
Method and circuit for stop of signals quantized using noise-shaping
A system and method are provided for stopping a quantized signal from a noise-shaper with a significantly reduced inband transient, compared to a traditional random stop of a noise-shaped signal....
|
|
|
7330555 |
Coding device and method, and recording medium
An L-channel signal and an R-channel signal are input into a subtractor in which the difference between the L-channel signal and the R-channel signal is determined. The resulting signal is input...
|
|
|
7324598 |
Apparatus and method to reduce quantization error
An apparatus includes a quantizer to generate a quantized signal from an input signal and a function unit may be included to generate an output signal by applying a predetermined function to the...
|
|
|
7315264 |
Systems and methods for controlling transient response in the output of a noise shaper
Systems and methods implemented in a multi-bit digital noise shaper for reducing or eliminating undesirable transient response when the noise shaper exits a clipping state. In one embodiment, the...
|
|
|
7292902 |
Frame-based audio transmission/storage with overlap to facilitate smooth crossfading
Methods for splicing PCM audio frames form modified frames by appending to each frame either a portion of the next preceding frame or the next following frame. According to a first approach,...
|
|
|
7281176 |
Determining signal quality and selecting a slice level via a forbidden zone
In one embodiment, a method may determine a number of data transitions occurring in a forbidden zone at each of a first and second slice levels and adjust a slice level offset for an amplifier...
|
|
|
7266152 |
Digital signal processing device and digital signal processing method
A device for performing predetermined processing on an input signal that may have a signal amplitude of more than one bit. The input signal is obtained by subjecting one-bit serial signals to...
|
|
|
7233624 |
Method and system for all digital gain control
An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses...
|
|
|
7227910 |
Communication device with configurable sigma-delta modulator
In up-to date communication devices an intermediate frequency signal is generated at first in a digital way and than is converted to an analogue signal by a digital-to-analogue converter ( 10 ). In...
|
|
|
7203242 |
Code rate adaptive encoding/decoding arrangement and method for a pulse code modulation system
A code rate adaptive encoding/decoding arrangement and method for a pulse code modulation system comprises a code rate adaptor and a code capacity meter to dynamically produce a code rate adaptive...
|
|
|
7164719 |
System to reduce distortion due to coding with a sample-by-sample quantizer
A distortion removal system for reducing the quantization distortion that results from quantization of a signal by sample-by-sample quantization techniques is disclosed. The distortion removal...
|
|
|
7142597 |
Full bridge integral noise shaping for quantization of pulse width modulation signals
Systems and methods are described for full bridge integral noise shaping for quantization of pulse width modulated signals. A method for full bridge integral noise shaping comprises: receiving a...
|
|
|
7123659 |
Digital reception apparatus for removing distortion from received signals
A digital reception apparatus includes a receiver that processes a received signal and a distortion corrector that corrects a non-linear distortion of the processed received signal, introduced by...
|
|
|
7046975 |
Method and system for blind detection of modulation type
The invention relates to a method and a receiver for demodulating a modulation symbol in a communication system without knowledge of the modulation constellation employed in a transmitter to...
|
|
|
7046817 |
Image processing apparatus and method therefor
It is one object of the present invention to prevent embedded verification information from being lost even when a quantization process is performed after verification information has been...
|
|
|
7039837 |
Signal coding
Respective error detection codes (CRC) are selectively added to respective source coded signal parts depending on the type of source coded signal part. Further, important source coded signal parts...
|
|
|
6996187 |
Method and apparatus for data transmission
A method and an apparatus for transmitting data on an internal and/or external transfer path in and/or to a semiconductor component such as a semiconductor memory, in which, a first coder/decoder...
|
|
|
6973143 |
Soft-normalizer for a channel decoder
The invention proposes a device for generating, from incoming signal values (X i,n ), soft-values (Y i,n ) to be input into a channel decoder of a communication device for use in a wireless...
|
|
|
6931159 |
Size reduction method and device for compressed images
A method and device for reducing a compressed image to a target size by reducing the quality of the image by a quality scaling factor. Image statistics inherent to the image are used to compute the...
|
|
|
6907481 |
System for bit-rate controlled digital stream playback and method thereof
A system and methods are provided for a controlled transfer of a portion of a data stream between a digital storage media and a corresponding stream decoder. A data stream stored in digital storage...
|
|
|
6876706 |
Method for common source and channel coding
In a method, and a signal processing arrangement, for coding information, the information symbol sequences are first sorted in accordance with the probability of occurrence of the symbols in the...
|
|
|
6754258 |
Systems, methods and computer program products for averaging learned levels in the presence of digital impairments based on patterns
Methods, systems and computer program products for averaging measured levels from differing frame intervals based on a digital impairment pattern associated with the frame intervals are provided....
|
|
|
6744825 |
Method and system for quadrature modulation and digital-to-analog conversion
A method and system for quadrature modulation and digital-to-analog conversion of a sampled and digitally represented complex baseband signal which permits the use of simple, power-saving, accurate...
|
|
|
6728319 |
Decoding method and apparatus
A decoder in a communication system using channel optimized vector quantization and including an encoder stores active encoder centroids c i corresponding to active indices i, an active index...
|
|
|
6653968 |
System for generating a signal to superimpose information
A system for generating a signal which, in addition to first information representing the rotational speed of a rotating part, contains at least second information. The signal changes over time...
|
|
|
6633841 |
Voice activity detection speech coding to accommodate music signals
An extended signal coding system that accommodates substantially music-like signals within a signal while maintaining a high perceptual quality in a reproduced signal during discontinued...
|
|
|
6611795 |
Apparatus and method for providing adaptive forward error correction utilizing the error vector magnitude metric
An adaptive forward error correction technique based on noise bursts and the rate at which they occur is disclosed. The forward error correction parameters are determined using statistics...
|
|
|
6600788 |
Narrow-band filter including sigma-delta modulator implemented in a programmable logic device
A narrow-band bandpass filter is implemented in a field programmable gate array (FPGA). An analog-to-digital converter quantizes an input analog signal with a high degree of precision to produce...
|
|
|
6590945 |
Method and apparatus for frequency offset compensation
A simplified method for frequency offset estimation in a TDMA cellular PCS environment using π/4-shifted DQPSK comprises the steps of multiplying a complex conjugate of a received complex-valued...
|
|
|
6549580 |
Subset averaged median predictor for differential pulse code modulation
A predictor for differential pulse code modulation that designates a subset averaged median (SAM) predictor, which removes transmission errors and/or minimizes error propagation. The SAM predictor...
|
|
|
6549569 |
System and method for improving conversion between A-law and U-law coding
A modem or other telephone device ( 102, 502 ) is configured to identify (or receive notification of) the companding law used by a destination modem or telephone device. The telephone device ( 102,...
|
|
|
6525579 |
Pulse translational circuits
In a circuit for producing output pulses which correspond to pre-selected voltage pulses occurring in an input signal train; means connected to derive from said input signal train a succession of...
|
|
|
6504491 |
Simultaneous multi-data stream transmission method and apparatus
In a simultaneous multi-data stream transmission method and apparatus a first signal is transmitted at a fixed repetition rate from a first transceiver device ( 14 ). A second transceiver ( 33 )...
|
|
|
6421388 |
Method and apparatus for determining PCM code translations
A method and apparatus for determining the correct decision regions in a PCM communication receiver utilizing a public Digital Telephone Network (DTN). A receiver receives samples from an analog...
|
|
|
6418164 |
Adaptive equalizer with enhanced error quantization
An adaptive equalizer for use in blind equalization systems to compensate for transmission channel distortion and noise in a digital communication system uses multiple quantization levels for...
|
|
|
6417949 |
Broadband communication system for efficiently transmitting broadband signals
A broadband communication system ( 60 ), such as a cable television system, includes a forward path for transmitting information from headend equipment to subscribers and a reverse path for...
|
|
|
6343217 |
Digital cordless telephony with PCM coding
A digital cordless telephone system using lossless pulse code modulation (PCM) for encoding an audio signal. By using an efficiently implemented and uncompressed encoding scheme, the system...
|
|
|
6324231 |
DC offset cancellation apparatus and method for digital demodulatation
A DC offset cancellation circuit comprises a subtracter, a noise shaper, an accumulator and an attenuator. The subtracter is used to subtract a quantized DC offset from a digital signal. The noise...
|
|
|
6212207 |
Robbed bit signal detection and compensation
Detection and compensation for periodic disturbances in sampled data such as the error introduced by robbed bit signaling (RBS) in a digital carrier system. A period of N samples, e.g., six or...
|
|
|
6181745 |
Process for monitoring the quantization quality in digital radio or television transmission systems
In order to monitor the transmission quality of digitized signals, the quantization interference power is measured in a region where no useful signal is being transmitted. The quantization step for...
|
|
|
6157678 |
Probabilistic trellis/coded modulation with PCM-derived constellations
Signal points from a PCM-derived constellation are selected for transmission via a modulation technique which employs different levels of redundancy coding--including the possibility of no...
|
|
|
6128346 |
Method and apparatus for quantizing a signal in a digital system
An input data signal (102) in a digital signal processing system gets adaptively quantized by performing a LMS error algorithm on a signal of transformed coefficients (113), determining paths of...
|
|
|
6125470 |
Distributive encoder for encoding error signals which represent signal peak errors in data signals for correcting erroneous signal baseline conditions
A digital signal error detection circuit and method for identifying interruptions in respective occurrences of opposing signal states of an equalized digital data signal. Signal level status...
|
|
|
6069921 |
System and method for reducing quantization noise
A system and method for reducing quantizing noise is presented. In some Internet access and other dial-up services, modems or other sources connect into analog switching systems, and then are...
|