4187results about How to "Improve noise" patented technology

A method and system to increase the throughput of a communications system that uses an electrical power distribution system as a communications pathway, determines the phase of the power distribution power cycle and compares this determined phase to predetermined regions of the power cycle. If the power cycle is within a predetermined region, a particular communication scheme is used for transmitting and receiving information. The power cycle can have two or more predetermined regions. Optionally, the throughput for any or all regions can be determined so as to provide for modification of the associated communication scheme if the throughput is determined to be outside some predetermined range.

A device comprising a voice activity detector for detecting voice activity in a speech signal using digital data formed on the basis of samples of an audio signal. The voice activity detector comprises a first element adapted to examine whether the signal has a highpass nature. The voice activity detector also comprises a second element adapted to examine the frequency spectrum of the signal. The voice activity detector is adapted to provide an indication of speech when the first element has determined that the signal has a highpass nature or the second element has determined that the signal does not have a flat frequency response.

Improved decision feedback equalizer and decision directed timing recovery systems and methods suitable for use in connection with a dual mode QAM / VSB receiver system are disclosed. A trellis decoder operates in conjunction with a decision feedback equalizer circuit on trellis coded 8-VSB modulated signals. The trellis decoder includes a 4-state traceback memory circuit outputting a maximum likelihood decision as well as a number of intermediate decisions based upon the maximum likelihood sequence path. Any number of decisions, along the sequence, may be provided as an input signal to timing recovery system loops, with the particular decision along the sequence chosen on the basis of its delay through the trellis decoder. Variable delay circuitry is coupled to the other input of the timing recovery system loops in order to ensure that both input signals bear the same timestamp. Final decisions are output from the trellis decoder to a DFE in order to enhance the DFE's ability to operate in low SNR environments. A decision sequence estimation error signal is also generated and used to drive the tap updates of both the DFE and an FFE portion of the equalizer.

The invention is applicable to the technical field of household electrical appliances and provides a vibration compensation method for a single-rotor compressor and a controller. The method comprises the following steps: acquiring a rotating speed set value omega* and a rotating speed estimated value omega e corresponding to a speed command value; multiplying a speed error delta omega by cos theta, carrying out low pass filtering so as to obtain the cosine component Qc of a speed fluctuation fundamental wave, multiplying delta omega by sin theta and carrying out low pass filtering so as to obtain the sine component Qs of the speed fluctuation fundamental wave; multiplying Qc by cos (theta+delta theta), multiplying Qs by sin (theta+delta theta) and adding the result of multiplication of Qc by cos (theta+delta theta) and the result of multiplication of Qs by sin (theta+delta theta) together so as to obtain an intermediate rotating speed omega rip; subjecting omega rip to high pass filtering so as to obtain a q-shaft current compensation value; and inputting the q-shaft current compensation value into the single-rotor compressor to realize vibration compensation. With the technical scheme provided by the invention, the advantages of reduction in vibration of the single-rotor compressor and easy realization are obtained.

Disclosed herein is a solid-state imaging element including a pixel unit configured to include a plurality of pixels arranged in a matrix and a pixel signal readout unit configured to include an analog-digital conversion unit that carries out analog-digital conversion of a pixel signal read out from the pixel unit. Each one of the pixels in the pixel unit includes a plurality of divided pixels arising from division into regions different from each other in optical sensitivity or a charge accumulation amount. The pixel signal readout unit reads out divided-pixel signals of the divided pixels in the pixel. The analog-digital conversion unit carries out analog-digital conversion of the divided-pixel signals that are read out and adds the divided-pixel signals to each other to obtain a pixel signal of one pixel.

The invention relates to the field of computer diagnostics. The method consists in the steps of forming radiation forming in this wave range, consisting of separate partial radiations, which are different from each other by values of their physical features, directing of the formed radiations into a side of the observed object, receiving a radiation, dispersed from the observed object, through a focusing element, transforming of the received radiation in electrical signals and forming a synthesized enhance image of the observed object by combining said given electrical signals. Besides, each separate partial radiation is additionally distinctly encoded for example by means of its modulation, which differs from a modulation of other partial radiations, the partial radiations are directed to a diffuser for decreasing their spatial coherence and / or their dispersing by means of different portions of the diffuser in order to create an additional distinctly encoded partial radiations with an additional modulation, corresponding to an angle of impingement onto the observed object. After reflecting of the radiation from the observed object the step of focusing of this radiation to a receiving device is realized, which accomplishes a transforming of set of partial radiations in a corresponding array set of electrical signals, there is realized the step of decoding of partial electrical signals, corresponding to said partial radiations, from each of said electrical signals of said array set there are formed partial images from array sets with various partial electrical signals and then an combination of the partial images or their portions is realized in order to form enhanced resultant image of the object.

Noise reduction system with remote noise detector The present invention relates to a noise reduction system with at least one remote noise detector placed close to at least one noise source, which transmits relevant information to a primary device where it is used for noise reduction. Thereby, acoustic signal enhancement can be achieved via the at least one remote noise detector in that a noise estimate is transmitted to controller for noise reduction in the signal obtained from a primary source.