Patent application number | Description | Published |
20090063139 | Signal modification method for efficient coding of speech signals - For determining a long-term-prediction delay parameter characterizing a long term prediction in a technique using signal modification for digitally encoding a sound signal, the sound signal is divided into a series of successive frames, a feature of the sound signal is located in a previous frame, a corresponding feature of the sound signal is located in a current frame, and the long-term-prediction delay parameter is determined for the current frame while mapping, with the long term prediction, the signal feature of the previous frame with the corresponding signal feature of the current frame. In a signal modification method for implementation into a technique for digitally encoding a sound signal, the sound signal is divided into a series of successive frames, each frame of the sound signal is partitioned into a plurality of signal segments, and at least a part of the signal segments of the frame are warped while constraining the warped signal segments inside the frame. For searching pitch pulses in a sound signal, a residual signal is produced by filtering the sound signal through a linear prediction analysis filter, a weighted sound signal is produced by processing the sound signal through a weighting filter, the weighted sound signal being indicative of signal periodicity, a synthesized weighted sound signal is produced by filtering a synthesized speech signal produced during a last subframe of a previous frame of the sound signal through the weighting filter, a last pitch pulse of the sound signal of the previous frame is located from the residual signal, a pitch pulse prototype of given length is extracted around the position of the last pitch pulse of the sound signal of the previous frame using the synthesized weighted sound signal, and the pitch pulses are located in a current frame using the pitch pulse prototype. | 03-05-2009 |
Patent application number | Description | Published |
20100241425 | Method and Device for Coding Transition Frames in Speech Signals - There is provided a transition mode device and method for use in a predictive-type sound signal codec for producing a transition mode excitation replacing an adaptive codebook excitation in a transition frame and/or a frame following the transition in the sound signal, comprising an input for receiving a codebook index and a transition mode codebook for generating a set of codevectors independent from past excitation. The transition mode codebook is responsive to the index for generating, in the transition frame and/or frame following the transition, one of the codevectors of the set corresponding to the transition mode excitation. There is also provided an encoding device and method and a decoding device and method using the above described transition mode device and method. | 09-23-2010 |
20100280831 | Method and Device for Fast Algebraic Codebook Search in Speech and Audio Coding - A method and device for searching an algebraic codebook during encoding of a sound signal, wherein the algebraic codebook comprises a set of codevectors formed of a number of pulse positions and a number of pulses distributed over the pulse positions. In the algebraic codebook searching method and device, a reference signal for use in searching the algebraic codebook is calculated. In a first stage, a position of a first pulse is determined in relation with the reference signal and among the number of pulse positions. In each of a number of stages subsequent to the first stage, (a) an algebraic codebook gain is recomputed, (b) the reference signal is updated using the recomputed algebraic codebook gain and (c) a position of another pulse is determined in relation with the updated reference signal and among the number of pulse positions. A codevector of the algebraic codebook is computed using the positions of the pulses determined in the first and subsequent stages, wherein a number of the first and subsequent stages corresponds to the number of pulses in the codevectors of the algebraic codebook. | 11-04-2010 |
20110035213 | Method and Device for Sound Activity Detection and Sound Signal Classification - A device and method for estimating a tonality of a sound signal comprise: calculating a current residual spectrum of the sound signal; detecting peaks in the current residual spectrum; calculating a correlation map between the current residual spectrum and a previous residual spectrum for each detected peak; and calculating a long-term correlation map based on the calculated correlation map, the long-term correlation map being indicative of a tonality in the sound signal. | 02-10-2011 |
20110046947 | System and Method for Enhancing a Decoded Tonal Sound Signal - A system and method for enhancing a tonal sound signal decoded by a decoder of a speech-specific codec in response to a received coded bit stream, in which a spectral analyser is responsive to the decoded tonal sound signal to produce spectral parameters representative of the decoded tonal sound signal. A quantization noise in low-energy spectral regions of the decoded tonal sound signal is reduced in response to the spectral parameters produced by the spectral analyser. The spectral analyser divides a spectrum resulting from spectral analysis into a set of critical frequency bands each comprising a number of frequency bins, and the reducer of quantization noise comprises a noise attenuator that scales the spectrum of the decoded tonal sound signal per critical frequency band, per frequency bin, or per both critical frequency band and frequency bin. | 02-24-2011 |
20110125505 | Method and Device for Efficient Frame Erasure Concealment in Speech Codecs - A method and device for concealing frame erasures caused by frames of an encoded sound signal erased during transmission from an encoder to a decoder and for recovery of the decoder after frame erasures comprise, in the encoder, determining concealment/recovery parameters including at least phase information related to frames of the encoded sound signal. The concealment/recovery parameters determined in the encoder are transmitted to the decoder and, in the decoder, frame erasure concealment is conducted in response to the received concealment/recovery parameters. The frame erasure concealment comprises resynchronizing, in response to the received phase information, the erasure-concealed frames with corresponding frames of the sound signal encoded at the encoder. When no concealment/recovery parameters are transmitted to the decoder, a phase information of each frame of the encoded sound signal that has been erased during transmission from the encoder to the decoder is estimated in the decoder. Also, frame erasure concealment is conducted in the decoder in response to the estimated phase information, wherein the frame erasure concealment comprises resynchronizing, in response to the estimated phase information, each erasure-concealed frame with a corresponding frame of the sound signal encoded at the encoder. | 05-26-2011 |
20120101813 | Coding Generic Audio Signals at Low Bitrates and Low Delay - A mixed time-domain/frequency-domain coding device and method for coding an input sound signal, wherein a time-domain excitation contribution is calculated in response to the input sound signal. A cut-off frequency for the time-domain excitation contribution is also calculated in response to the input sound signal, and a frequency extent of the time-domain excitation contribution is adjusted in relation to this cut-off frequency. Following calculation of a frequency-domain excitation contribution in response to the input sound signal, the adjusted time-domain excitation contribution and the frequency-domain excitation contribution are added to form a mixed time-domain/frequency-domain excitation constituting a coded version of the input sound signal. In the calculation of the time-domain excitation contribution, the input sound signal may be processed in successive frames of the input sound signal and a number of sub-frames to be used in a current frame may be calculated. | 04-26-2012 |
20130121508 | Non-Speech Content for Low Rate CELP Decoder - A method and device for modifying a synthesis of a time-domain excitation decoded by a time-domain decoder, wherein the synthesis of the decoded time-domain excitation is classified into one of a number of categories. The decoded time-domain excitation is converted into a frequency-domain excitation, and the frequency-domain excitation is modified as a function of the category in which the synthesis of the decoded time-domain excitation is classified. The modified frequency-domain excitation is converted into a modified time-domain excitation, and a synthesis filter is supplied with the modified time-domain excitation to produce a modified synthesis of the decoded time-domain excitation. | 05-16-2013 |
20140249807 | DEVICE AND METHOD FOR REDUCING QUANTIZATION NOISE IN A TIME-DOMAIN DECODER - The present disclosure relates to a device and method for reducing quantization noise in a signal contained in a time-domain excitation decoded by a time-domain decoder. The decoded time-domain excitation is converted into a frequency-domain excitation. A weighting mask is produced for retrieving spectral information lost in the quantization noise. The frequency-domain excitation is modified to increase spectral dynamics by application of the weighting mask. The modified frequency-domain excitation is converted into a modified time-domain excitation. The method and device can be used for improving music content rendering of linear-prediction (LP) based codecs. Optionally, a synthesis of the decoded time-domain excitation may be classified into one of a first set of excitation categories and a second set of excitation categories, the second set including INACTIVE or UNVOICED categories, the first set including an OTHER category. | 09-04-2014 |
Patent application number | Description | Published |
20080293095 | Polydiacetylene-Containing Solid Colorimetric and/or Fluorescent Detector, Method for Its Preparation and Uses Thereof - A colorimetric and/or fluorescent detector, which comprises a film of polydiacetylenes and lipids deposited on a substrate, wherein said film is coated with one or more layers, wherein at least one of said layers is capable of supporting the growth of microorganisms. Also provided are processes for preparing the novel colorimetric and/or fluorescent detector and uses thereof in the detection of bacteria. | 11-27-2008 |
20080299598 | Detector Comprising a Membrane Perturbation - Detecting Polymer and Functional Membrane Fragments - A construct comprising functional membrane fragments and one or more perturbation-detecting polymers associated therewith, wherein said construct responds to perturbations of said membrane fragments by means of a detectable change in one or more physical or chemical properties associated with said construct. | 12-04-2008 |
20100272993 | NANOWIRES, METHOD OF FABRICATION THE SAME AND USES THEREOF - A method of forming a nanowire structure is disclosed. The method comprises applying on a surface of carrier liquid a layer of a liquid composition which comprises a surfactant and a plurality of nanostructures each having a core and a shell, and heating at least one of the carrier liquid and the liquid composition to a temperature selected such that the nanostructures are segregated from the surfactant and assemble into a nanowire structure on the surface. | 10-28-2010 |
20130285008 | NANOWIRES, METHOD OF FABRICATION THE SAME AND USES THEREOF - A method of forming a nanowire structure is disclosed. The method comprises applying on a surface of carrier liquid a layer of a liquid composition which comprises a surfactant and a plurality of nanostructures each having a core and a shell, and heating at least one of the carrier liquid and the liquid composition to a temperature selected such that the nanostructures are segregated from the surfactant and assemble into a nanowire structure on the surface. | 10-31-2013 |
20150345025 | GOLD NANOSTRUCTURES AND PROCESSES FOR THEIR PREPARATION - An electroless process for depositing gold (Au | 12-03-2015 |
20160041102 | POLY(METHYL METHACRYLATE)-SUPPORTED POLYDIACETYLENE FILMS AS COLORIMETRIC AND/OR FLUORESCENT DETECTORS - Colorimetric and/or fluorescent detectors, which include a polydiacetylene (PDA) film deposited on a polymethylmetacrylate (PMMA) substrate. There are also colorimetric and/or fluorescent detectors which have a solid organic matrix comprising one or more PDAs deposited on the PMMA substrate, wherein the PDA includes polymerized units of one or more diacetylene monomers, and wherein the matrix further comprises at least one recognition element of an analyte. There are also methods for detecting analytes using this detector, uses thereof and a methods for its preparation. | 02-11-2016 |
Patent application number | Description | Published |
20100097004 | System And Apparatus For Cathodoluminescent Lighting - Electron sources for a cathodoluminescent lighting system are disclosed. An electron source is a broad-beam reflecting-type electron gun having a cathode for emitting electrons and a reflector and/or secondary emitter electrode and no grids. An alternative electron gun has a cathode having a heater welded to a disk, the disk having an emissive surface on a side facing a dome-shaped defocusing grid and an anode. A lighting system incorporating the electron sources has an envelope with a transparent face, an anode with a phosphor layer to emit light through the face and a conductor layer. The system also has a power supply for providing from five to thirty thousand volts of power to the light emitting device to draw electrons from cathode to anode and excite a cathodoluminescent phosphor, and the electrons transiting from cathode to anode are essentially unfocused. A power-factor-corrected embodiment is also disclosed. | 04-22-2010 |
20120139407 | System And Manufacturing A Cathodoluminescent Lighting Device - A device for lighting a room is described. The device has an envelope with a transparent face, the face having an interior surface coated with a cathodoluminescent screen and a thin, reflective, conductive, anode layer. There is a broad-beam electron gun mounted directly to feedthroughs in a base of the envelope with a heated, button-on-hairpin, cathode for emitting electrons in a broad beam towards the anode, and a power supply mounted on the feedthroughs at the base of the envelope that drives the cathode to a multi-kilovolt negative voltage. A two-prong snubber serves as an anode contact to permit the power supply to drive the anode to a voltage near ground. A method of manufacture of the anode uses a single step deposition and lacquering process followed by a metallization using a conical-spiral tungsten filament coated with aluminum by a thermal spray coating process. | 06-07-2012 |
20130043790 | System And Apparatus For Cathodoluminescent Lighting - Electron sources for a cathodoluminescent lighting system are disclosed. An electron source is a broad-beam reflecting-type electron gun having a cathode for emitting electrons and a reflector and/or secondary emitter electrode and no grids. An alternative electron gun has a cathode having a heater welded to a disk, the disk having an emissive surface on a side facing a dome-shaped defocusing grid and an anode. A lighting system incorporating the electron sources has an envelope with a transparent face, an anode with a phosphor layer to emit light through the face and a conductor layer. The system also has a power supply for providing from five to thirty thousand volts of power to the light emitting device to draw electrons from cathode to anode and excite a cathodoluminescent phosphor, and the electrons transiting from cathode to anode are essentially unfocused. A power-factor-corrected embodiment is also disclosed. | 02-21-2013 |