|
Match
|
Document |
Document Title |
|
|
7627469 |
Audio signal encoding apparatus and audio signal encoding method
Any disagreement of the power level before encoding an audio signal and the power level after encoding the audio signal is adjusted to improve the sound quality to the auditory sense. The present...
|
|
|
7583584 |
System and method for time diversity
A system and method for time diversity uses interleaving. To simplify the operation at both transmitters and receivers, a formula can be used to determine the mapping from slot to interlace at a...
|
|
|
7574355 |
Apparatus and method for determining a quantizer step size
For determining a quantizer step size for quantizing a signal including audio or video information, a first quantizer step size as well as an interference threshold are provided. Then, the actual...
|
|
|
7541959 |
High speed signal processor
A waveform acquisition system that captures and digitizes a wideband electrical signal through a bank of front end filters, frequency down converters, and conventional digitizers (A/D converters)....
|
|
|
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...
|
|
|
7453942 |
Method and unit for substracting quantization noise from a PCM signal
A method and unit for substracting quantization noise from a pulse code modulated PCM signal being segmented into frames. For achieving this it is proposed to first calculate for each frame of the...
|
|
|
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...
|
|
|
7386052 |
Automation device using FSK modulation
The invention relates to an automation device, with which a multiplicity of physically distributed functional units communicate with each other by means of a common transmission protocol. The...
|
|
|
7356085 |
Embedded multiple description scalar quantizers for progressive image transmission
A method and a device for transmission and/or reception of digital signals are disclosed. In one embodiment, the method comprises quantizing a source digital signal to generate with different...
|
|
|
7336713 |
Method and apparatus for encoding and decoding data
A DPCM operation which can reduce the size of differential data and a method and an apparatus for encoding data using the DPCM operation are provided. A method for generating differential data...
|
|
|
7333547 |
Methods and devices for dynamic quantizing input of a soft decision decoder
Dynamic quantization methods and dynamic quantizers for quantizing soft outputs of an equalizer according to the channel condition in order to alleviate the computational load on a soft decision...
|
|
|
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...
|
|
|
7315602 |
Digital spread spectrum frequency synthesizer
The present invention provides a digital spread spectrum frequency synthesizer that comprises a noise-shaped quantizer, a divider and an adjustment means. The noise-shaped quantizer is used to...
|
|
|
7313186 |
Method and apparatus for implementing wavelet filters in a digital system
A digital data system ( 100 ) provides 1-D, 2-D and 3-D capability and multi-band channel capability. Improved filter banks are created by generating a filter bank having an analysis portion and...
|
|
|
7295617 |
ADPCM decoder
A shift register receives a quantization difference signal separated into a mantissa part and an exponent part and bit-develops the mantissa part. A shift arithmetic operation control circuit...
|
|
|
7289565 |
Multiple description coding communication system
A method and apparatus reliably encode and decode information over a communication system. The method includes transforming two coefficients into two pairs of random variables, one random variable...
|
|
|
7289781 |
Device for receiving digital signals
A device for receiving digita1 signals comprising at least one receiving antenna for receiving signals, a measuring means for determining parameters of relevance to signal quality of signals...
|
|
|
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...
|
|
|
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...
|
|
|
7119701 |
Techniques for detection of an active connection to a network
An apparatus and method for detecting a connection to a data transmission network functions by detecting the network signal energy on a network cable while avoiding the problems of excessive power...
|
|
|
7088779 |
Method and apparatus for reducing the word length of a digital input signal and method and apparatus for recovering a digital input signal
A method and signal processing apparatus for reducing the number of bits of a digital input signal (M i ), includes adding a pseudo-random noise signal (N a ) to the digital input signal (M i ) to...
|
|
|
7046260 |
Menu generating method and recording device for a record carrier
The present invention relates to a menu picture generating method and to a recording device for recording a menu picture on a record carrier ( 20 ), wherein a key frame picture is scaled and then...
|
|
|
7031395 |
Apparatus and methods for digital-to-analog conversion
An apparatus for converting a digital input signal to an analog signal for transmission. The input signal can include more than one carrier signal. A plurality of delta-sigma modulation loop...
|
|
|
7020189 |
Method and apparatus for implementing digital filters in the data path of a PCM modem for efficient transition of a second analog-to-digital conversion process
Method and system for implementing digital filters in the data path of a Pulse Code Modulated (PCM) modem to allow efficient transition of a second analog to digital conversion process in a...
|
|
|
7002913 |
Packet loss compensation method using injection of spectrally shaped noise
An insertion-based error concealment method and apparatus are provided whereby, instead of directly inserting white noise, a filter is created to shape the white noise. The filtered white noise is...
|
|
|
6985532 |
Ultra wideband (UWB) transmitter architecture
System and method for analog signal generation and manipulation in an ultra-wideband (UWB) transmitter. A preferred embodiment comprises a digital portion 305 of an UWB transmitter (for example,...
|
|
|
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...
|
|
|
6950641 |
Apparatus, and an associated method, for increasing receiver sensitivity of a direct conversion receiver
Apparatus, and an associated method, for a direct conversion receiver by which to selectably increase the sensitivity of the receiver. The direct conversion receiver includes a baseband amplifier...
|
|
|
6909746 |
Fast robust data compression method and system
A video compression process speeds the optimal choice of quantizers for compressing a data stream by setting up the optimization problem as a path-optimization problem in configuration space and...
|
|
|
6894602 |
System and method for active detection of connection to a network
An apparatus and method for detecting a connection to a data transmission network functions by detecting the network signal energy on a network cable while avoiding the problems of excessive power...
|
|
|
6785340 |
PCM upstream and downstream system for universal digital loop carrier
A central office line unit (COLU) for a pulse code modulation (PCM) upstream and downstream system in a universal digital loop carrier (UDLC) includes a hybrid circuit for transmitting/receiving an...
|
|
|
6754267 |
Image processing apparatus
An image processing apparatus includes a converter, a quantizer, a transfer speed recognizer, a transfer data converter and an interface. The converter reads an image of a subject to convert it...
|
|
|
6751260 |
Detecting superimposed information channels for modem connections
A first transceiver transmits a set of test levels to a second transceiver as a signal through a communication channel as encoded samples and subjected to one or more of a plurality of line...
|
|
|
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...
|
|
|
6697434 |
Method for tracing optimal path using Trellis-based adaptive quantizer
A method for tracing an optimal path by employing a Trellis-based adaptive quantizer can accelerate quantization path tracing and simplify computation thereof, by preventing the quantization path...
|
|
|
6647064 |
ADPCM encoding apparatus, ADPCM decoding apparatus and delay circuit
An improved ADPCM encoding and decoding apparatus for compressing and de-compressing a differential signal between an input digital signal and a predicted value of said digitized input in...
|
|
|
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...
|
|
|
6574280 |
Method and apparatus for detecting and determining characteristics of a digital channel in a data communication system
An initialization procedure for a digital modem system treats the presence of ADPCM as if it were a digital impairment such that the modem system can utilize effective compensation techniques to...
|
|
|
6504863 |
Method and apparatus for adaptive bit resolution in a digital receiver and digital transmitter
A transceiver includes a receiver and a transmitter. The receiver includes an analog-to-digital conversion device for converting a received analog signal to digital form, and the transmitter...
|
|
|
6493389 |
Method and device for modifying data in an encoded data stream
A basic transcoder, that decodes an encoded data stream and re-encodes it, may be used for locally modifying data in said stream. Said modification is carried out by defining a predicted data...
|
|
|
6486811 |
Offset-free analog-to-digital converter
Analog-to-digital converter for converting an analog input signal which is present at a signal input ( 2 a, 2 b ) and has a specific frequency bandwidth, into an offset-free digital output signal,...
|
|
|
6480550 |
Method of compressing an analogue signal
Described is a method of compressing an analogue signal, e.g. a voice signal, the signal function being continuously sampled, quantized and encoded into data words, the difference between each two...
|
|
|
6477211 |
Transcoding of a data stream
A data stream (DS) comprises a time multiplex of coded data (D) and control data (C). The data stream (DS) may be, for example, of the MPEG type representing a sequence of pictures. The coded data...
|
|
|
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...
|
|
|
6405338 |
Unequal error protection for perceptual audio coders
An audio information bit stream including audio control bits and audio data bits is processed for transmission in a communication system. The audio data bits are first separated into n classes...
|
|
|
6404820 |
Method for storage and reconstruction of the extended hamming code for an 8-dimensional lattice quantizer
A method of lattice-quantizing an eight-long data point to minimize storage requirements by acquiring the data point, multiplying each coordinate of the data point by {square root over (2)} to form...
|
|
|
6400770 |
High speed encoding and decoding methods for analog subscriber connections
A high speed decoder for recovering a digital data stream from an analog signal transmitted to said decoder via an analog local loop connected to said decoder. The decoder includes an interface to...
|