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| Number | Title | Issue Date |
| 7817725 | Data converter device and data conversion method, and transmitter circuit, communications device and electronic device using the same The present invention aims to provide a transmitter circuit that is capable of suppressing quantization noise and operating with a high efficiency, a data converter section 13 and a data conversion method for use therein, and a communications device using the... | 10/19/2010 |
| 7697614 | System and method for calibrating an analog signal path during operation in an ultra wideband receiver A system (500) and method (400) are presented for calibrating an analog signal path (200) associated with an Ultra Wideband (UWB) receiver (103). The analog signal path includes a plurality of analog gain stages (210, 212-214, 2... | 04/13/2010 |
| 7636396 | Method of testing remote power line carrier pick-up coil Methods to test the operation of the pick-up coil without having to de-energize the power line serving as the power line carrier in order to perform testing on the pick-up coil. A series of test frequencies are introduced and parameters of the pick-up coil can be me... | 12/22/2009 |
| 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 PCM signal a quantization noise level Bq according to an equation hav... | 11/18/2008 |
| 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 downstream multi-carrier tones of a digital subscriber line activation... | 07/29/2008 |
| 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 communications device may be configured to include: an error detector ... | 06/24/2008 |
| 7391814 | 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 an analog to digital conversion method that increases the number of ... | 06/24/2008 |
| 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 device has a microcontroller (110), which is assigned at least one ... | 06/10/2008 |
| 7366241 | Data reproduction apparatus and data reproduction method In a data transmission system, a server is provided with a data storage unit which holds plural video streams having different I-frame intervals, as coded data corresponding to the same video sequence, and a data transmission unit for transmitting a predetermined vi... | 04/29/2008 |
| 7359456 | Communication system and communication device A communication system for transmitting a transmission signal in digital form from a transmitter to a receiver is disclosed. The transmitter includes a modulation part modulating a carrier wave in accordance with the transmission signal according to frequency modula... | 04/15/2008 |
| 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 quantizations at least a first and a second bit-stream, of which at least ... | 04/08/2008 |
| 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 includes generating differential data by performing a DPCM operation on q... | 02/26/2008 |
| 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 decoder. The dynamic quantizer assigns only a few bits to represent the... | 02/19/2008 |
| 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 into first and second multipliers. In the first multiplier, a mixed out... | 02/12/2008 |
| 7330482 | Method for processing digital symbols in a communication system and transmitter and receiver for carrying out the method The digital symbols of a sequence are assigned to respective positions in successive timeslots, according to a predetermined slot format. In a plurality of timeslots, a symbol of the sequence is replaced by a substitution symbol carrying additional information. A si... | 02/12/2008 |
| 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 quantized signal. The apparatus further may include a correction unit t... | 01/29/2008 |
| 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 quantize a period control word to a time-varying value. The divider is us... | 01/01/2008 |
| 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 synthesis portion and obtaining wavelet coefficients (302) ... | 12/25/2007 |
| 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 bit-shifts the bit-developed mantissa part in accordance with a value of t... | 11/13/2007 |
| 7292901 | Hybrid multi-channel/cue coding/decoding of audio signals Part of the spectrum of two or more input signals is encoded using conventional coding techniques, while encoding the rest of the spectrum using binaural cue coding (BCC). In BCC coding, spectral components of the input signals are downmixed and BCC parameters (e.g.... | 11/06/2007 |
| 7289567 | Apparatus and method for transmitting and receiving data using partial chase combining An apparatus and method for transmitting and receiving data, wherein retransmissions of information can be a different size from the initial transmission. The invention utilizes a partial Chase encoder 306 to truncate or expand data depending on the availabil... | 10/30/2007 |
| 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 received by the antenna, and a digitizer for the signals received by the an... | 10/30/2007 |
| 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 in each pair having substantially equal energy as one random variable... | 10/30/2007 |
| 7279993 | Phase-locked loop A phase-locked loop includes an oscillator, a phase detector coupled to the oscillator, a charge pump coupled to the phase detector, a filter coupled to the charge pump, a voltage controlled oscillator, and a fractional frequency divider. The voltage controlled osci... | 10/09/2007 |
| 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 predetermined signal processing, wherein the signal amplitude of more than... | 09/04/2007 |
| 7253755 | High dynamic range analog to digital converter architecture An analog-to-digital converter (“ADC”) architecture as described herein utilizes a digital signal processor having suitably configured waveform prediction logic that can predict expected types of input signals. The ADC architecture subtracts the predictable sign... | 08/07/2007 |
| 7242336 | Continuous-time delta-sigma ADC for a radio receiver employing 200 kHz IF A Continuous-Time Delta-Sigma Analog-to-Digital Converter (CTΔΣADC) for a radio frequency (RF) receiver employing a 200 kHz IF realizes an optimal signal-to-noise ratio using a programmable resonator that is set to resonate at 200 kHz. The programmable resonator i... | 07/10/2007 |
| 7236051 | Programmable glitch filter An apparatus and method for filtering glitches in data signals are provided. The apparatus and method provide a programmable glitch filter that may be programmed to filter glitches of different depths. The apparatus and method further provide a glitch filter that is... | 06/26/2007 |
| 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 an analog to digital conversion method that increases the number of ... | 06/19/2007 |
| 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 order to offer a greater flexibility in choosing a particular d... | 06/05/2007 |
| 7225135 | Signal-predictive audio transmission system Various methods and systems disclosed compand audio signals using signal prediction, followed by expansion and reconstruction. The methods and systems compress and expand an error signal that represents deviations between samples of the original signal and predicted... | 05/29/2007 |
| 7206563 | Reduction of radio frequency interference (RFI) produced by switching amplifiers Apparatus and methods for reducing radio frequency interference produced by switching amplifiers, includes a variable-order noise shaper in a system that includes an AM tuner. An alternative implementation involves determining the tuned frequency of a radio signal. ... | 04/17/2007 |
| 7206740 | Efficient excitation quantization in noise feedback coding with general noise shaping In a Noise Feedback Coding (NFC) system operable in a ZERO-STATE condition and a ZERO-INPUT condition, the NFC system including at least one filter having a filter memory, a method of updating the filter memory. The method comprises: (a) producing a ZERO-STATE contr... | 04/17/2007 |
| 7197093 | Digital signal processing apparatus and digital signal processing method A digital signal of which input data has been segmented as block each having a predetermined data amount and highly efficiently encoded along with an adjacent block is decoded, edited, and then highly efficiently encoded. A delay that takes place in such signal proc... | 03/27/2007 |
| 7190723 | Digital stream transcoder with a hybrid-rate controller A rate controller in a transcoder, which receives a stream of compressed frames carried in a bit stream, selectively determines whether to quantize and/or threshold slices of a frame carried in the stream of frames. The rate controller determines the input size of t... | 03/13/2007 |
| 7184473 | Equalizers for layered modulated and other signals A method and apparatus for equalizing digital data signals is disclosed. The method comprises the steps of demodulating and decoding an input signal having input data to produce a data output, remodulating the data output to produce a training sequence including an ... | 02/27/2007 |
| 7180959 | Technique for utilizing spare bandwidth resulting from the use of a code in a multi-level signaling system A technique for utilizing spare bandwidth resulting from the use of a code in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for utilizing spare bandwidth resulting from the use of a cod... | 02/20/2007 |
| 7180958 | Technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system A technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for utilizing spare bandwidth resulting f... | 02/20/2007 |
| 7180957 | Technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system A technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for utilizing spare bandwidth resulting f... | 02/20/2007 |
| 7180944 | Low-complexity spatial downscaling video transcoder and method thereof A low-complexity spatial downscaling video transcoder and method thereof are disclosed. The transcoder comprises a decoder having a reduced DCT-MC unit, a DCT-domain downscaling unit, and an encoder. The decoder performs the DCT-MC operation at a reduced-resolution ... | 02/20/2007 |
