262 results about "Breathy voice" patented technology

The invention discloses a sound effect switching method and system for a mobile terminal. The method comprises the steps that the stream label of an output scene of an audio stream is defined and serves as a mark for distinguishing output scene types, the matching relations between output scene types and the sound modes supported by the mobile terminal are established, and a sound effect comparison table is formed; when an audio output instruction is detected, an audio management service of the mobile terminal identifies the output scene type of the current audio stream by reading the stream label; the sound mode is switched to be matched with the output scene of the audio stream according to the sound mode comparison table. According to the sound effect switching method and system for the mobile terminal, the output scene of the audio stream is identified by means of the audio management service, the matched sound mode is obtained through automatic switching under different scenes, the problem that due to the fact that the global sound effect is not applicable to certain scenes, noise is caused or expected audio enjoyment can not be reached is solved, it is guaranteed that suitable sound effects can be obtained under different application scenes, manual switching conducted by users is not needed, and experience is improved.

A method for assisting in the diagnosis of heart murmurs. The method calculates a normalized measure of mid-range energy for at least one systolic or diastolic interval in a sequence of heartbeats and displays the mid-range energy measure of the systolic and/or diastolic interval in a graphical form. The sequence of heartbeats is also processed to detect and diagnose heart murmurs by adjusting a murmur count threshold responsive to the mid-range energy. The method may be used to diagnose hypertrophic cardiomyopathy and to determine effective therapeutic drug dosage or therapeutic device setting.

An apparatus to enable health care providers to perform a number of diagnostic procedures, including listening to the heart, obtaining electrocardiograms and sonograms. A pocket size instrument displays an EKG tracing on its screen simultaneously upon auscultation of the heart. The abdomen may also be investigated by displaying a sonogram. Wireless broadband technology may provide a closed circuit interface for real-time wireless transmission of acquired data. Examination requires none of a multiplicity of wires to untangle, bulky machines or a technician to be summoned. Regurgitation, heart size, ischemia and heart murmurs can all be evaluated by a visual and auditory methods.

The invention discloses a method and a device for quantitatively analyzing heart sound signals. The method comprises the following steps of: acquiring multiple heart sound signals at clinical auscultation positions; preprocessing the acquired multiple heart sound signals; extracting heart sound envelope curves and characteristic parameters of the preprocessed multiple heart sound signals respectively; dividing a systole period in a cardiac cycle of each heart sound signal into a first heart sound period and a systolic murmur period, dividing a diastole period into a second heart sound period and a diastolic murmur period, and computing heart sound energy in all periods respectively; and computing the percentage of the heart sound energy in all the periods in the whole cycle to determine the intensity of normal heart sound and the emergent time and intensity of murmurs. By the method for quantitatively analyzing the heart sound signals, the intensity, the emergent time and the duration time of all components of heart sound can be quantitatively analyzed, and an analysis result can be used as a diagnosis basis for clinical common cardiovascular diseases; and the method and the device are used for evaluating the relationship between cardiac murmur types and the cardiovascular diseases.

Disclosed is an output system for displaying an auscultatory sound signal such as heartbeat or respiratory sounds generated from the interior of a body in real time. The output system includes a stethoscope and a computer. The stethoscope includes at least a) a diaphragm to he brought into contact with a specific portion of a human body so as to vibrate according to a sound generated from the body, b) a microphone for converting the vibration of the diaphragm to an electrical sound signal, c) a signal process unit adjusting an auscultatory frequency band of the electrical sound signal from the microphone and outputting an auscultatory sound signal, d) a sound output unit for outputting a sound input from the signal process unit, and c) a signal output unit for transmitting the auscultatory sound signal output from the signal process unit to the outside. The computer displays an output signal received from the stethoscope, together with a standard sound pattern a user selects from standard sound patterns stored in a database.

A process for pre-processing recorded and digitised heart sounds and corresponding digitised ECG signals is provided. The pre-processed signals (203) are suitable for input into an automatic decision support system implemented by means of a diagnostic decision network (205), used for diagnosing and differentiation between normal/functional (206) and pathological (207) heart murmurs, particularly in paediatric patients. The process includes identifying or predicting locations of individual heart beats within the heart sound signal, identifying the positions of the S1 and S2 heart pulses within the respective heart beats, predicting and identifying the locations and durations of the systole and diastole segments of the heart beats (302), determining if segmentation of the heart sound signal is possible based on the selected and isolated heart beats (305), and the segmentation of the respective heart beats into segments for allowing better feature extraction. The invention also provides a process for detecting the QRS complex of an ECG signal for optimizing the number of heart beat cycles detected.

A method for extracting and evaluating features from cardiac acoustic signals includes the steps of obtaining a cardiac acoustic signal, extracting physiologically significant features from the cardiac acoustic signal using a neural network, analyzing the cardiac acoustic signal with a wavelist decomposition to extract time-frequency information, and identifying basic heart sounds using neutral networks applied to the extracted time-frequency information. A method for determining a status of heart murmurs includes the steps of obtaining a cardiac acoustic signal, detecting a murmur, if any, from the cardiac acoustic signal, and determining whether the murmur is one of functional and pathological based upon expert rules.

The invention relates to a novel voiceprint recognition-based television device. The device comprises a voice signal acquisition module, a signal preprocessing module, a sound information extraction module, an identification module and a television control module and is characterized in that: a voice signal is acquired by the voice acquisition module; background noise of the signal is filtered by the signal preprocessing module; the sound information extraction module extracts processed voice signal information and judges whether the voice signal information is stored or identification is performed; in the identification module, extracted voice information is compared with voice information data stored in a storage so as to judge the identity of a user; and corresponding television operation is completed by the television control module according to an identification result of a person. The technical scheme of the invention is novel and an implementation method is specific. The device has very high use value in the application field of television control.

A real-time signal processing technique for ultrasonic imaging of tissue vibrations for localizing the source of a bruit in a 2D image with respect to the anatomy and/or for obtaining simultaneous information about vibrations and the underlying blood flow. The bruit can be quantitatively assessed using an ensemble of ultrasound echoes. Signal processing enables estimation of wall displacement and the display of time-resolved vibration spectrum. Vibrations are detected and color-coded according to their amplitude and frequency and overlaid on the B-mode and/or color-flow image in real time. Proposed vibration imaging algorithms use data acquired during conventional ultrasonic color-flow imaging and the clutter signal, normally suppressed in color-flow imaging, to detect and characterize tissue vibrations. Three vibration imaging algorithms based on parametric modeling of vibrations and other criteria distinguish between clutter, blood flow, and vibrations. The techniques are usable to detect, locate, image, and quantitatively grade stenoses in blood vessels.

The invention provides a video shooting method and system used for adding background music to a shot video during video shooting. The method comprises the steps of firstly playing the background music in the background to obtain decoded audio data of the background music, then performing channel conversion and re-sampling of the audio data to obtain audio data which meets the video shooting requirements in term of the number of sound channels and the sampling rate, and finally performing audio and video synchronization of the shot video and the audio data meeting the video shooting requirements and performing encoding to obtain a video file with the background music. By applying the video shooting method and the system, the background music can be added to the shot video while videos are shot, and noise is ensured not to exist in the background music.

The invention provides a voice amplifying method and a mobile terminal, and solves the problem of a non-ideal voice amplification effect caused by changing a holding posture, as the holding posture is changeless, of existing voice amplification equipment. The voice amplifying method provided by the invention comprises the following steps: acquiring audio signals received by a plurality of microphones of the mobile terminal; determining the microphone, closest to a voice source, in the plurality of microphones as a primary microphone according to audio information of the audio signals received by each microphone; performing amplification process on the audio signals received by the primary microphone; and outputting amplified audio signals through a loudspeaker. According to embodiments of the invention, when the holding posture of the voice amplification equipment changes, amplification process is performed on the audio signals received by the primary microphone closest to the voice source, so that noise interference is reduced, outputted audio signals are clearer, and user experience of a user is improved.

Embodiments of the invention disclose a role transition method and device based on Bluetooth connection, which are applied to the technical field of information processing. In the method, when terminal equipment is in a process of sending played audio data to a Bluetooth earphone or Bluetooth vehicle kit through Bluetooth connection, the terminal equipment sends a response for refusing role transition after receiving a role transition request sent by the Bluetooth earphone or Bluetooth vehicle kit so as to refuse the Bluetooth earphone or Bluetooth vehicle kit serving as main equipment, so that a factor that causes stuck, noise or interruption of audio data received by the Bluetooth earphone or Bluetooth vehicle kit is avoided.

The invention relates to a coronary heart disease surveillance and diagnosis device. The coronary heart disease surveillance and diagnosis device comprises a heart-lung signal collection device and aheart-lung signal analyzing device, wherein the heart-lung signal collection device collects heart-lung sound overlapped signals and sends the heart-lung sound overlapped signals to the heart-lung signal analyzing device, and the heart-lung signal analyzing device separates the heart-lung sound overlapped signals according to the short-time Fourier transform method so as to obtain an original heart sound signal; the original heart sound signal is reduced according to the double-threshold method, the peak picking method and the endpoint algorithm so as to obtain a phonocardiogram; the phonocardiogram is subjected to complex wavelet transformation so as to extract a signal envelop of the complex wavelet transformation; the signal envelop is trained according to a trained BP neural network soas to obtain an analysis result, and the analysis result is output. Based on the characteristic that in the early period of the coronary heart disease, high-frequency pathological murmur can occur inthe heart sound signal, the heart-lung sound overlapped signals are analyzed by using the short-time Fourier transform method, it is noninvasively and early diagnosed whether an examinee suffers fromthe coronary heart disease or not, and the diagnosis efficiency is high.

The invention provides a high-frequency cracks processing method which comprises that: the first step: a receiving terminal has a short-time energy analysis on received speech data; the short-time energy of the achieved speech data is compared with an energy threshold value; if the short-time energy of the speech data is greater than the energy threshold value, the speech data is a sonant signal, otherwise, the speech data is a surd signal; the second step: the sonant signal is processed by basetone frequency analysis and the basetone frequency of the received sonant signal is compared with a basetone frequency threshold value; if the basetone frequency of the sonant signal is greater than the basetone frequency threshold value, the sonant signal is a high-frequency cracks signal, otherwise, the sonant signal is a normal sonant signal; the third step: the judged high-frequency cracks signal is analyzed and processed. The invention also provides a high-frequency cracks analytical method. Through the high-frequency cracks processing method and the analytical method provided by the invention, the high-frequency cracks in the normal speech signal can be judged and data source is recorded, further the cause for producing the high-frequency cracks is analyzed, thereby solving the produced problems.

A method of creating medical documentation uses selection of images representing synonyms for complex medical concepts. The images can be of two types, one corresponding to a parameter or Key in a Key/Value pair and the other corresponding to possible values of the selected parameter or Key. The user first selects an image or portion thereof corresponding to the parameter they wish to record observations, such as the heart or a valve of the heart. A set of images representing possible values of the parameter is then displayed e.g., images representing possible murmurs the selected valve may have. The user selects the image representing the value corresponding to the observation of the patient. A document is created by recording either the Key/Value image pairs or, alternative, text representing the synonyms for the images. Other methods of recording the document are possible, such as instantiating a set of class objects.

The invention relates to a heart sound location segmenting method suitable for an Android system. The heart sound location segmenting method suitable for the Android system comprises the following steps of firstly carrying out pre-processing on a heart sound signal, which mainly consists of mean-removal normalization and resampling of hear sounds; secondly determining the order number of high-order Shannon entropies, and extracting envelope of the heart sounds by utilizing the high-order Shannon entropies; thirdly configuring a sliding window, determining an upper threshold and a lower threshold of the envelope of the heart sounds, restraining the influence of noise and interference on segmentation by utilizing the upper threshold, carrying out the detection on the demarcation point of the heart sounds by utilizing the lower threshold, and carrying out initial location on the demarcation point; finally correcting the demarcation point after being subjected to the initial location, eliminating the influence of the interference according to medical physiological information of the heart sounds, judging whether possible splitting of the heart sounds exists or not, and carrying out the combination of the heart sounds if determining that the splitting of the hear sound exists. According to the heart sound location segmenting method suitable for the Android system, the computation and extract processes of the envelop of the heart sounds are simplified, and excellent robustness on the noise and the heart murmur is provided; the accuracy of segmentation is relatively high.

The invention discloses a method for noise reduction and preventing the loss of IP network voice data pack which comprises the steps of: calculating the most economical convention length L by getting a section of voice data pack from sender and separating voice segments with L; packing the separated voice segments and sending via IP network; if data packs are lost on voice data receiver and their adjacent voice data packs are not lost, then generating an energy wavy line for restoring the lost voice data pack according to its adjacent data packs. The invention also provides apparatus for sending and receiving voice data packs. The inventive apparatus is characterized in keeping the restored voice data integrate and smooth during play and reducing interference.

The invention relates to an intelligent mobile phone heart sound visible examination device and an examination signal transmission method. The signal transmission method is attached on a mobile phone and used for carrying out visible examination for human heart sound signals, and the device is attached on the mobile phone and used for carrying out visible examination for human heart sound signals. The device utilizes a piezoelectric shock heart sound sensor to obtain heart sound signals and transmits the signals to a mobile phone through a USB interface of microphone input terminal of the mobile phone after the signals are amplified and filtered by a voltage preamplifier; the heart sound signals are stored by a recorder in the mobile phone and then compared with the normal heart sound signals stored in the mobile phone; and then waveform, heart rate and murmur grade are displayed on the display screen of the mobile phone, when the heart rate is over high or heart sound is abnormal, the mobile phone can show indication words, thereby the visible examination signal transmission is realized.

The invention is applicable to the field of audio detection and provides a noise detecting method and device of a loudspeaker. The noise detecting method includes steps of playing detecting signals; extracting frequency of the detecting signals passing Codec; recording the extracted frequency and impedance of the loudspeaker corresponding to the detecting signals when the extracted frequency is within a preset frequency range; determining the maximum value of the recorded impedance; looking up symmetric points utilizing the maximum value of the impedance as the center; judging whether electric signals of the loudspeaker satisfy requirements or not according to the maximum value of the impedance, the frequency corresponding to the maximum value of the impedance and the frequency corresponding to the symmetric points utilizing the maximum value of the impedance as the center; when the electric signals of the loudspeaker do not satisfy the requirements, judging that the loudspeaker has noise; when the electric signals of the loudspeaker satisfy the requirements, judging whether acoustic signals of the loudspeaker meet the requirements or not so as to judge whether the loudspeaker has noise or not. By the noise detecting method and device in the embodiment, accuracy in detecting results is improved.

The invention discloses an audio processing method in mobile digital television recording. The method comprises the following steps of: packaging each advanced audio coding + (AAC+) code stream naked data frame which is received from the air into a frame in an audio data transport stream (ADTS) format; analyzing an ADTS frame head to find the original AAC+ code stream naked data of the frame; decoding the AAC+ code stream naked data, removing spectral band replication (SBR) information from the AAC+ code stream naked data in an audio decoding, recording and buffering area, and converting the AAC+ code stream naked data in the audio decoding, recording and buffering area into AAC naked data; and performing a subsequent decoding process by using an AAC+ decoder, and transmitting the AAC naked data to a recording module to record video and audio files. By the method, the mobile digital television recording also can be performed even if the signal is poor, and a recorded video file can benormally played on a computer by mainstream video play software, and severe abnormal phenomena such as harsh noise, silence, player breakdown, system crash and the like are avoided.

Methods, systems, and computer readable media are provided for identification of heart sound components in an audio signal of heart sounds. Time domain kurtosis and frequency domain kurtosis are used to distinguish peaks corresponding to the primary heart sounds, S₁ and S₂, from murmur peaks. Timing based error correction may also be used to verify that appropriate peaks corresponding to the primary heart sounds are identified.

A procedure for extracting features from phonocardiographic signals without the use of synchronizing information from electrocardiographic signals. The features extracted are the timing and value of first and second heart sounds and various combinations of timing and value of signal components constituting heart murmur. Such combinations are directly related to various heart conditions, which are more easily diagnosable by a medically trained person when assisted by the signal extraction. The features are extracted by a novel combination of energy/time relationships for the heart signal and various novel classification schemes.