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296 results about "Energy parameter" patented technology

Method and device for efficient frame erasure concealment in linear predictive based speech codecs

The present invention relates to a method and device for improving concealment of frame erasure caused by frames of an encoded sound signal erased during transmission from an encoder (106) to a decoder (110), and for accelerating recovery of the decoder after non erased frames of the encoded sound signal have been received. For that purpose, concealment/recovery parameters are determined in the encoder or decoder. When determined in the encoder (106), the concealment/recovery parameters are transmitted to the decoder (110). In the decoder, erasure frame concealment and decoder recovery is conducted in response to the concealment/recovery parameters. The concealment/recovery parameters may be selected from the group consisting of: a signal classification parameter, an energy information parameter and a phase information parameter. The determination of the concealment/recovery parameters comprises classifying the successive frames of the encoded sound signal as unvoiced, unvoiced transition, voiced transition, voiced, or onset, and this classification is determined on the basis of at least a part of the following parameters: a normalized correlation parameter, a spectral tilt parameter, a signal-to-noise ratio parameter, a pitch stability parameter, a relative frame energy parameter, and a zero crossing parameter.
Owner:VOICEAGE EVS LLC

Method and device for efficient frame erasure concealment in linear predictive based speech codecs

The present invention relates to a method and device for improving concealment of frame erasure caused by frames of an encoded sound signal erased during transmission from an encoder (106) to a decoder (110), and for accelerating recovery of the decoder after non erased frames of the encoded sound signal have been received. For that purpose, concealment / recovery parameters are determined in the encoder or decoder. When determined in the encoder (106), the concealment / recovery parameters are transmitted to the decoder (110). In the decoder, erasure frame concealment and decoder recovery is conducted in response to the concealment / recovery parameters. The concealment / recovery parameters may be selected from the group consisting of: a signal classification parameter, an energy information parameter and a phase information parameter. The determination of the concealment / recovery parameters comprises classifying the successive frames of the encoded sound signal as unvoiced, unvoiced transition, voiced transition, voiced, or onset, and this classification is determined on the basis of at least a part of the following parameters: a normalized correlation parameter, a spectral tilt parameter, a signal-to-noise ratio parameter, a pitch stability parameter, a relative frame energy parameter, and a zero crossing parameter.
Owner:VOICEAGE EVS LLC

Robust speech boundary detection system and method

A system for audio processing comprising an initial background statistical model system configured to generate an initial background statistical model using a predetermined sample size of audio data. A parameter computation system configured to generate parametric data for the audio data including cepstral and energy parameters. A background statistics computation system configured to generate preliminary background statistics for determining whether speech has been detected. A first speech detection system configured to determine whether speech was present in the initial sample of audio data. An adaptive background statistical model system configured to provide an adaptive background statistical model for use in continuous processing of audio data for speech detection. A parameter computation system configured to calculate cepstral parameters, energy parameters and other suitable parameters for speech detection. A speech / non-speech classification system configured to classify individual frames as speech frames or non-speech frames, based on the computed parameters and the adaptive background statistical model data. A background statistics update system configured to update the background statistical model based on detected speech and non-speech frames. A second speech detection system configured to perform speech detection processing and to generate a suitable indicator for use in processing audio data that is determined to include speech signals.
Owner:SYNAPTICS INC

Abnormal engine sound fault on-line diagnostic system and diagnostic method

The invention provides an abnormal engine sound fault on-line diagnostic system and diagnostic method. The diagnostic system comprises a sound signal sensor, a sound signal collecting and storing module and an analysis and diagnosis module. The analysis and diagnosis module comprises a spectral analysis and diagnosis module, a wavelet analysis and diagnosis module and a psychological acoustics analysis and diagnosis module, wherein the spectral analysis and diagnosis module is used for obtaining frequency spectrum parameters through the spectral analysis, the wavelet analysis and diagnosis module is used for obtaining energy parameters through the wavelet analysis, and the psychological acoustics analysis and diagnosis module is used for obtaining psychological acoustics parameters through the psychological acoustics analysis. The spectral analysis and diagnosis module, the wavelet analysis and diagnosis module and the psychological acoustics analysis and diagnosis module are used for extracting the frequency spectrum parameters, the energy parameters and the psychological acoustics parameters respectively to show abnormal sound fault characteristics. The abnormal engine sound fault on-line diagnostic system replaces manual work to carry out on-line diagnostic working on the abnormal engine sound fault, the diagnostic accuracy and consistency are high, the abnormal sound fault diagnosis requirements for real-time performance, fastness and accuracy of an engine production line can be met, and the working efficiency of an engine detection line is improved.
Owner:CHONGQING CONSTR ELECTROMECHANICAL CO LTD

Laser-water jet composite micromachining process and device

The invention relates to a laser micromachining process and in particular relates to a laser-water jet composite micromachining process and device. The composite micromachining process comprises the following steps of: positioning water jet at the back of a laser beam, leaning the water jet, and simultaneously acting the water jet on the surface of a material, wherein the parameter of a water jet offset distance is as follows: the water jet offset distance, namely the range of the distance between a laser beam action point and post-positioned water jet erosion point, is 0.4-0.8mm; the focal plane position (fpp) parameter of the laser beam is minus 0.6mm-0mm; the energy parameter of laser pulse is 0.3mJ-0.6mJ; the overlap coefficient of mobile laser pulse is 99.3%-99.9%; and the pressure of water jet is 5MPa-20Mpa, and the erosion angle of the water jet is 30-60 degrees. The device provided by the invention is composed of a base body consisting of a horizontal guide rail and a vertical guide rail, a horizontal slide plate, a vertical slide plate, a rotary adjusting support, a water jet unit and a laser cutting unit. According to the invention, the laser heating and softening temperature is far less than the melting or gasifying temperature, the heat influence on a material machining zone is reduced, and high-efficiency, stable and near-nondestructive precise machining is realized.
Owner:SHANDONG UNIV

3dsMax-based nuclear facility model radiation field dosage simulation method

ActiveCN107194103AQuick assignmentRealize radiation field dose calculationDesign optimisation/simulationSpecial data processing applicationsVoxelDecay factor
The invention provides a 3dsMax-based nuclear facility model radiation field dosage simulation method. The method comprises the following steps of: constructing a model by 3dsMax software according to determined nuclear facility parameters, and storing a file in a 3DS format; importing a 3DS nuclear facility model file and obtaining model parameters; decomposing the 3dsMax nuclear facility model into voxels by using an octree method; writing determined voxel parameters and material information into an input card; importing the input card into a point nuclear integration program; calculating an accumulation factor; calculating a mean free path, in a radiation field, of a gamma ray; establishing a flux rate-dosage rate conversion factor, quality decay factors of chemical elements and materials and a single-layer accumulation factor database by utilizing an SQLite database engine; carrying out combined operation on a box by using a Boolean connective operator, and constructing a complicated radiation field geometric structure; and calculating a three-dimensional radiation field dosage by using a point nuclear integration method. The method provided by the invention is capable of realizing radiation field dosage calculation of complicated 3dsMax nuclear facility models with sizes, materials and energy parameters.
Owner:HARBIN ENG UNIV

Audio signal classification apparatus and method used in wideband audio encoder and decoder

The invention discloses an audio signal sorting device in a broadband audio codec, wherein a background noise estimating and controlling module is used for receiving the spectral distribution parameter of a sorting parameter extracting module and sending the update rate to a signal initial sorting module; the signal initial sorting module is used for carrying out the initial sorting of the audio input signal according to the sub-band energy parameter and the update rate, and sending the initial sorting results to a sorted parameter extracting module and a signal sorting determining module; the sorted parameter extracting module is used for extracting and sorting the input signals, sending the sorting characteristic parameter of the acquired signal to the signal sorting determining module and feeding the acquired spectral distribution parameter back to the background noise estimating and controlling module at the same time; and the signal sorting determining module is used for setting the final sorting mark for the sorting characteristics parameter according the initial sorting results, wherein the final sorting mark is used for defining the determining sort of the output signal. The invention further discloses an audio signal sorting method in the broadband audio codec.
Owner:ZTE CORP

Microneedle template and preparation method thereof

The invention belongs to the technical field of dosing equipment and specifically relates to a microneedle template and a preparation method thereof. The microneedle template is prepared from a polydimethylsiloxane film; a micropore array is formed in the surface of the polydimethylsiloxane film; and the polydimethylsiloxane film is prepared by mixing a polydimethylsiloxane film prepolymer and a curing agent. Compared with the prior art, the microneedle template is excellent in micropore uniformity; the template is firm and durable, and applicable to preparing microneedle products of a plurality of types by use of a melt or solution pouring method; and as being proven, the prepared microneedles can be applied to transdermal drug delivery or skin preprocessing. In addition, the preparation method only comprises directly perforating the surface of the polydimethylsiloxane only by use of a laser beam; the preparation material is simple, the method is simple and easy to implement, the preparation efficiency is high and the production automation can be realized; and besides, the shape and size of the micropores can be controlled by adjusting the laser energy parameter according to production requirements, and the microneedle templates of different structure parameters can be designed.
Owner:BEIJING UNIV OF CHEM TECH

Asphalt-aggregate interface adhesion property testing method

The invention discloses an asphalt-aggregate interface adhesion property testing method. The method comprises the following steps: A, selecting three testing liquids which are not dissolved in asphalt and have known surface energy; B, heating the asphalt or a warm mixing agent till a flowing state is achieved, respectively casting on a plate, cooling to form a smooth plane, and grinding aggregate into a smooth plane of which two sides are parallel to each other; C, respectively dripping the three liquids on the smooth plane formed by the asphalt, the warm mixing agent or the aggregate in the step B, and respectively measuring contact angles of three testing liquids on the surface of the asphalt, the aggregate or the warm mixing agent; D, calculating the surface energy of the asphalt, the aggregate or the warm mixing agent; E, respectively constructing adhesion models in different systems, and calculating adhesion work of the adhesion models; and F, establishing energy parameters, and evaluating the influence of an additive to the adhesion property of asphalt-aggregate in an implementation sequence of steps A, B, C-F or B, A, C-F. By adopting the asphalt-aggregate interface adhesion property testing method, the influence of the additive to the adhesion property of the system can be evaluated.
Owner:BEIJING UNIV OF CIVIL ENG & ARCHITECTURE

Facial expression recognition method based on feature point vectors and texture deformation energy parameter

InactiveCN102945361ASolve the impact of facial expression recognitionCharacter and pattern recognitionNerve networkPrincipal component analysis
The invention provides a facial expression recognition method based on feature point vectors and a texture deformation energy parameter. The method comprises the following steps: 1, respectively carrying out feature point positioning on neutral expressions and extreme expressions at a beginning end of a facial expression sequence by an AAM (Automatic Acoustic Management) tool of an OPENCV (Open Source Computer Vision Library); 2, forming feature point vectors with the selected 26 feature points to suit facial expression recognition, dividing the feature point vectors into a Euclidean distance d (representing a size) between the feature points and an included angle alpha (representing a direction) of connecting lines, calculating a distance coefficient ratio kd of the feature points according to d and alpha, and subtracting a redundant part kl to obtain kd - final (k alpha-final can be obtained in the same way); 3, establishing a feature block according to the feature points, calculating a texture deformation energy coefficient matrix, and finally obtaining the texture deformation energy parameter ks - final by PCA (Principal Component Analysis); and 4, inputting final features, namely using k final = kd - final + k alpha - final + ks - final as the training data of an RBF (Radial Basis Function) nerve network, and finally realizing facial expression recognition.
Owner:BEIHANG UNIV
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