CN102316395B - Method and device for judging and eliminating howlround - Google Patents
Method and device for judging and eliminating howlround Download PDFInfo
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- 238000003379 elimination reaction Methods 0.000 claims abstract description 26
- 230000008030 elimination Effects 0.000 claims abstract description 24
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- NRTLIYOWLVMQBO-UHFFFAOYSA-N 5-chloro-1,3-dimethyl-N-(1,1,3-trimethyl-1,3-dihydro-2-benzofuran-4-yl)pyrazole-4-carboxamide Chemical compound C=12C(C)OC(C)(C)C2=CC=CC=1NC(=O)C=1C(C)=NN(C)C=1Cl NRTLIYOWLVMQBO-UHFFFAOYSA-N 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 16
- 230000010363 phase shift Effects 0.000 claims description 10
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Abstract
The invention provides a method for judging and eliminating howlround, which comprises the steps of: sensing vibration data of a speaker through a sensor module; computing the vibration data in a certain time to obtain characteristic data, wherein the characteristic data comprises one or more frequency, amplitude and enveloped data; judging whether the speaker generates howlround or whether the speaker is in an initial stage of generating the howlround according to the characteristic data; when judging that the speaker is about to generate howlround, carrying out howlround preventive elimination on a sound signal to be output according to prestored howlround frequency point data; and when judging that the speaker is in the initial stage of generating the howlround, eliminating a howlround signal in the sound signal to be output in real time. Correspondingly, the embodiment of the invention also provides a device for eliminating the howlround. By using the method and the device provided by the embodiment of the invention, the howlround can be simply and conveniently judged and eliminated with low cost.
Description
Technical field
The present invention relates to electronic applications, particularly relate to a kind of method and apparatus judging and eliminate of uttering long and high-pitched sounds.
Background technology
In the sound effect system that microphone and loud speaker form, a part of voice signal that loud speaker exports often again enters system equipment by microphone and exports, owing to there is such positive feedback phenomenon, after speaker output signal intensity reaches system equipment full scale, will utter long and high-pitched sounds, the normal work of destruction system, therefore needs chauvent's criterion.
In order to address this problem, the method that multiple elimination is uttered long and high-pitched sounds is proposed in prior art, wherein, Chinese invention patent number is: in the patent of 200580006536.3, describe a kind of pair microphone that utilizes and eliminate the method for uttering long and high-pitched sounds, what produce when it can be used as expansion sound to send from loud speaker after suppressing enlarging section to be amplified the object sound received from the 1st microphone utters long and high-pitched sounds, produce and to receive to described 1st microphone and corresponding the 1st power spectrum of the 1st acoustic signal exported, produce and at least comprise described expansion sound and 2nd power spectrum corresponding with the 2nd acoustic signal that do not comprise described object sound to relating to, then according to described 1st power spectrum and described 2nd power spectrum, 1st acoustic signal described in filtering, and only the acoustic signal relating to described object sound is outputted to described enlarging section.And Chinese invention patent number is: in the patent of 200720050922.9, describe the automatic trap digital frequency shifter of a kind of DSP, comprise audio signal input circuit, analog to digital converter, DSP, band pass filter circuit and output amplifier circuit, DSP automatic search is utilized to utter long and high-pitched sounds a little and to a trap of uttering long and high-pitched sounds, to arrive the object eliminated and utter long and high-pitched sounds.
In two kinds of above-mentioned methods, eliminate method all more complicated of uttering long and high-pitched sounds, and implement not easily, and eliminate the judgement that the key of uttering long and high-pitched sounds is to utter long and high-pitched sounds.
Summary of the invention
In view of the problem existing for above-mentioned prior art, embodiments provide a kind of method and apparatus judging and eliminate of uttering long and high-pitched sounds, can judge simply and easily and eliminate to utter long and high-pitched sounds.
In order to solve the problems of the technologies described above, embodiments provide a kind of method judging and eliminate of uttering long and high-pitched sounds, comprising:
By the vibration data of sensor assembly sensing loud speaker;
Computing is carried out to the described vibration data in certain hour and obtains characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more;
Judge whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds according to described characteristic;
When judging by when uttering long and high-pitched sounds, treat according to the frequency point data of uttering long and high-pitched sounds prestored the preventative elimination that output sound signal carries out uttering long and high-pitched sounds;
When judging to be in the initial stage of uttering long and high-pitched sounds, eliminate the signal of uttering long and high-pitched sounds in voice signal to be output in real time.
Wherein, described by sensor assembly sensing loud speaker vibration data before also comprise:
Under debugging mode, sensor assembly sensing limber up period vibration data, loudspeaker vibration data when described limber up period vibration data comprises system worked well and loudspeaker vibration data when uttering long and high-pitched sounds;
Carry out computing to the vibration data in certain hour in described limber up period and obtain characteristic, described characteristic comprises Frequency point data, preserve all utter long and high-pitched sounds occur time place Frequency point data as frequency point data of uttering long and high-pitched sounds.
Wherein, described sensor assembly comprises acceleration transducer and/or gyroscope.
Wherein, when judging by when uttering long and high-pitched sounds, frequency point data that what described basis prestored utter long and high-pitched sounds treats the preventative elimination that output sound signal carries out uttering long and high-pitched sounds, and is specially:
According to described frequency point data of uttering long and high-pitched sounds, amplitude limit is carried out to the signal be near frequency of uttering long and high-pitched sounds in described voice signal to be output, or narrow-band filtering is carried out to it, or it is oppositely offset, or phase shift process is carried out to it, to destroy the condition of uttering long and high-pitched sounds and producing;
When judging to be in the initial stage of uttering long and high-pitched sounds, the signal of uttering long and high-pitched sounds in described real-time elimination voice signal to be output, is specially:
According to described frequency point data of uttering long and high-pitched sounds, amplitude limit is carried out to the signal of uttering long and high-pitched sounds in described voice signal to be output, or narrow-band filtering is carried out to it, or it is oppositely offset, or phase shift process is carried out to it, to destroy the condition of uttering long and high-pitched sounds and producing.
Accordingly, the embodiment of the present invention additionally provide one utter long and high-pitched sounds judgement and cancellation element, comprising:
To utter long and high-pitched sounds detection module, for sensing loudspeaker vibration data, with the characteristic obtained under normal real-time mode in certain hour and the frequency point data of uttering long and high-pitched sounds obtained under debugging mode in certain hour;
To utter long and high-pitched sounds processing module, judge whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds for the characteristic in the certain hour that detection module of uttering long and high-pitched sounds described in basis obtains, when judging by when uttering long and high-pitched sounds, treat according to described frequency point data of uttering long and high-pitched sounds the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; When judging to be in the initial stage of uttering long and high-pitched sounds, eliminate the signal of uttering long and high-pitched sounds in voice signal to be output in real time.
Wherein, detection module of uttering long and high-pitched sounds described in comprises:
Sensor unit, for sensing the vibration data of loud speaker;
Arithmetic element, is connected with described sensor unit, carries out computing for the vibration data within a certain period of time sensed described sensor unit, to obtain characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more;
Transmitting element, is connected with described arithmetic element, processing module of uttering long and high-pitched sounds described in the described characteristic for described arithmetic element computing being obtained is sent to.
Wherein, described sensor unit, also under debugging mode, sensing limber up period vibration data, loudspeaker vibration data when described limber up period vibration data comprises system worked well and loudspeaker vibration data when uttering long and high-pitched sounds;
Described arithmetic element, the vibration data in limber up period in certain hour also for sensing described sensor unit carries out computing, to obtain frequency point data of uttering long and high-pitched sounds;
Described transmitting element, processor module of uttering long and high-pitched sounds described in the frequency point data of uttering long and high-pitched sounds also for described arithmetic element computing being obtained is sent to.
Wherein, processing module of uttering long and high-pitched sounds described in comprises:
Receiving element, for receive from described detection module of uttering long and high-pitched sounds characteristic and to utter long and high-pitched sounds frequency point data;
Memory cell, is connected with described receiving element, for frequency point data of uttering long and high-pitched sounds described in storing;
Judging unit, judges whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds according to the characteristic that described receiving element receives;
Processing unit, is connected with judging unit with described memory cell respectively, for judging by when uttering long and high-pitched sounds at described judging unit, treats according to the frequency point data of uttering long and high-pitched sounds prestored the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; Or for when described judging unit is judged to be in the initial stage of uttering long and high-pitched sounds, eliminate the signal of uttering long and high-pitched sounds in voice signal to be output in real time.
Wherein, described processing unit comprises the clipping unit to being in the signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds in described voice signal to be output and carrying out amplitude limit, to the narrow-band filtering unit being in the signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds in described voice signal to be output and carrying out narrow-band filtering, to being in reverse offset unit that the signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds carry out oppositely offsetting in described voice signal to be output and one or more to what be in described voice signal to be output that signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds carry out in the phase-shifting unit of phase shift process.
Wherein, described sensor unit comprises acceleration transducer and/or gyroscope.
Implement the embodiment of the present invention, by the vibration data of sensor assembly sensing loud speaker; Computing is carried out to the described vibration data in certain hour and obtains characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more; Judge whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds according to described characteristic; When judging by when uttering long and high-pitched sounds, treat according to the frequency point data of uttering long and high-pitched sounds prestored the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; When judging to be in the initial stage of uttering long and high-pitched sounds, eliminating in real time the signal of uttering long and high-pitched sounds in voice signal to be output, utilizing the method and apparatus that the embodiment of the present invention provides, the judgement of uttering long and high-pitched sounds and elimination can be realized simply and easily, and cost is low.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 eliminates the method flow diagram of uttering long and high-pitched sounds in the embodiment of the present invention;
Fig. 2 is the structure chart eliminating the device of uttering long and high-pitched sounds in the embodiment of the present invention;
Fig. 3 is the structural representation of processing unit in Fig. 2.
Embodiment
Embodiments provide a kind of method and apparatus judging and eliminate of uttering long and high-pitched sounds, by the vibration data of sensor assembly sensing loud speaker; Computing is carried out to the described vibration data in certain hour and obtains characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more; Judge whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds according to described characteristic; When judging by when uttering long and high-pitched sounds, treat according to the frequency point data of uttering long and high-pitched sounds prestored the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; When judging to be in the initial stage of uttering long and high-pitched sounds, eliminating in real time the signal of uttering long and high-pitched sounds in voice signal to be output, utilizing the method and apparatus that the embodiment of the present invention provides, the judgement of uttering long and high-pitched sounds and elimination can be realized simply and easily, and cost is low.
Embodiments of the invention are described in detail below in conjunction with accompanying drawing.
See Fig. 1, for eliminating the method flow diagram of uttering long and high-pitched sounds in the embodiment of the present invention, comprise the steps:
Step 101: the vibration data being sensed loud speaker by sensor assembly under normal real-time mode, described sensor assembly is positioned at detector end of uttering long and high-pitched sounds, described detector of uttering long and high-pitched sounds is installed near loudspeaker horn, and described sensor assembly comprises acceleration transducer and/or gyroscope.
Step 102: computing is carried out to the described vibration data in certain hour and obtains characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more; Step 101 and step 102 are carried out in detector end of uttering long and high-pitched sounds, after computing obtains characteristic in a step 102, described characteristic can be sent to by wired or wireless mode processor end of uttering long and high-pitched sounds by detector end of uttering long and high-pitched sounds, and allows processor end of uttering long and high-pitched sounds carry out subsequent treatment.
Described step 101 and step 102 are all carried out in normal real-time mode, and the embodiment of the present invention also comprises a kind of debugging mode, therefore before step 101, also can comprise:
A: under debugging mode, sensor assembly sensing limber up period vibration data, loudspeaker vibration data when described limber up period vibration data comprises system worked well, by normal loudspeaker vibration data to the transient vibration data of uttering long and high-pitched sounds and when uttering long and high-pitched sounds;
B: carry out computing to the vibration data in certain hour in described limber up period and obtain characteristic, described characteristic comprises Frequency point data, preserve all utter long and high-pitched sounds occur time place Frequency point data as frequency point data of uttering long and high-pitched sounds.
Wherein, under debugging mode, vibration data when sensor assembly first can sense system worked well in a period of time near loudspeaker, then can artificially find out utters long and high-pitched sounds a little, the vibration data of loudspeaker annex when system is uttered long and high-pitched sounds in sensing a period of time is continued to make sensor assembly, analytic operation is carried out by the vibration data to vibration data during system worked well state and when uttering long and high-pitched sounds, can calculate and collect major part and to utter long and high-pitched sounds frequency, collected frequency of uttering long and high-pitched sounds is sent to after processor end of uttering long and high-pitched sounds preserves, after can be used as, eliminates the control point of uttering long and high-pitched sounds.
Step 103: judge whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds according to described characteristic, this step is carried out at processor end of uttering long and high-pitched sounds.Under normal real-time mode, the characteristic of sending from detector end of uttering long and high-pitched sounds in certain hour and described frequency point data of uttering long and high-pitched sounds can compare by processor end of uttering long and high-pitched sounds, when comprising the data of frequency point data annex of uttering long and high-pitched sounds in described characteristic, can judge by uttering long and high-pitched sounds, such as, frequency of uttering long and high-pitched sounds is 1KHZ, when comprising the frequency point data of 800HZ ~ 900HZ in characteristic, can judge to utter long and high-pitched sounds by mode; And when comprise in described characteristic utter long and high-pitched sounds frequency point data time, namely represent and uttered long and high-pitched sounds, in general, utilize method of the present invention just can be detected at the initial stage of uttering long and high-pitched sounds.In addition, whether the frequency that processor end of uttering long and high-pitched sounds can also calculate the vibrational waveform representated by characteristic is within a certain period of time constant, whether amplitude has becomes large trend gradually, become large gradually when amplitude and reach certain threshold value, just represent and be about to utter long and high-pitched sounds or be in the initial stage of uttering long and high-pitched sounds, wherein, the described initial stage of uttering long and high-pitched sounds is the primary stage just having started to utter long and high-pitched sounds, the process produced of uttering long and high-pitched sounds is that amplitude becomes large gradually by little, less at the initial stage of uttering long and high-pitched sounds amplitude of uttering long and high-pitched sounds, people's ear can't experience howling, just will utter long and high-pitched sounds at the initial stage of uttering long and high-pitched sounds and judge and eliminate, also can effectively avoid user to experience to utter long and high-pitched sounds, reach the object eliminated in time and utter long and high-pitched sounds.And when processor end of uttering long and high-pitched sounds reaches maximum according to the loud speaker amplitude that described characteristic is judged in certain hour and remains unchanged, also represent to have there occurs and utter long and high-pitched sounds.
Step 104: when judging by when uttering long and high-pitched sounds, treats according to the frequency point data of uttering long and high-pitched sounds prestored the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; When judging to be in the initial stage of uttering long and high-pitched sounds, eliminate the signal of uttering long and high-pitched sounds in voice signal to be output in real time.Described preventative elimination of uttering long and high-pitched sounds refers to when judging to utter long and high-pitched sounds by generation, namely utter long and high-pitched sounds produce zero boundary's point prerequisite before eliminate be about to produce signal of uttering long and high-pitched sounds, play a prevention utter long and high-pitched sounds produce object.During practical application, can different processing methods be selected according to different application demands to eliminate in advance or directly eliminate to utter long and high-pitched sounds, due to the sound wave that general howling is all arrowband, high-amplitude, therefore the signal of uttering long and high-pitched sounds eliminated in described voice signal comprise in following four kinds of modes one or more: 1) can according to the frequency point data of uttering long and high-pitched sounds calculated under debugging mode to being in the signal near frequency of uttering long and high-pitched sounds in described voice signal to be output or signal of uttering long and high-pitched sounds carries out amplitude limit, in the amplitude controlling of the signal that makes the to utter long and high-pitched sounds amplitude range in normal operating conditions reference data; 2) to being in the signal near frequency of uttering long and high-pitched sounds in described voice signal to be output or signal of uttering long and high-pitched sounds carries out narrow-band filtering, according to exploitation generation narrow band digital filter of uttering long and high-pitched sounds that present situation produces, filtering is carried out to arrowband; 3) to being in the signal near frequency of uttering long and high-pitched sounds in described voice signal to be output or signal of uttering long and high-pitched sounds oppositely is offset, the waveform of uttering long and high-pitched sounds that the signal of uttering long and high-pitched sounds judged at present is formed being carried out cancelling out each other with former waveform of uttering long and high-pitched sounds oppositely, eliminates utter long and high-pitched sounds completely; 4) phase shift process being carried out to the waveform being in the signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds formation in described voice signal to be output, arriving by destroying the condition of generation of uttering long and high-pitched sounds the object suppressing to utter long and high-pitched sounds.
The embodiment of the present invention can judge simultaneously and eliminate uttering long and high-pitched sounds of multiple microphone, uttering long and high-pitched sounds in elimination process, current vibration data also by sensor assembly is sensed in real time, and be sent to processor end of uttering long and high-pitched sounds after calculation process is carried out to described current vibration data, whether the processor end that makes to utter long and high-pitched sounds can analyze taked cancellation of uttering long and high-pitched sounds effective.
Be described above in the embodiment of the present invention method of uttering long and high-pitched sounds and eliminating, introduce in the embodiment of the present invention device of uttering long and high-pitched sounds and eliminating below in conjunction with Fig. 2, Fig. 3 in detail.
See Fig. 2, for eliminating the structure chart of the device of uttering long and high-pitched sounds in the embodiment of the present invention, described device comprises: utter long and high-pitched sounds detection module 1 and processing module 2 of uttering long and high-pitched sounds, wherein:
Described detection module 1 of uttering long and high-pitched sounds, be installed on loudspeaker horn annex, for sensing loudspeaker vibration data, with the characteristic obtained under normal real-time mode in certain hour and the frequency point data of uttering long and high-pitched sounds obtained under debugging mode in certain hour, and described frequency point data and the described characteristic of uttering long and high-pitched sounds is sent to by wired or wireless mode processing module 2 of uttering long and high-pitched sounds.Wherein, described frequency point data of uttering long and high-pitched sounds is that system generated under debugging mode, under debugging mode, vibration data when sensor assembly first can sense system worked well in a period of time near loudspeaker, then can people utter long and high-pitched sounds a little for searching out, the vibration data of loudspeaker annex when system is uttered long and high-pitched sounds in sensing a period of time is continued to make sensor assembly, analytic operation is carried out by the vibration data to vibration data during system worked well state and when uttering long and high-pitched sounds, can calculate and collect major part and to utter long and high-pitched sounds frequency, and the frequency of uttering long and high-pitched sounds collected is sent in processing module 2 of uttering long and high-pitched sounds preserves, and described characteristic is sensor unit by uttering long and high-pitched sounds in detection module 1 senses loud speaker vibration data within a certain period of time under normal real-time mode, and described vibration data is carried out to computing obtains.
Described processing module 2 of uttering long and high-pitched sounds, judge whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds for the characteristic in the certain hour that detection module 1 of uttering long and high-pitched sounds described in basis obtains, when judging by when uttering long and high-pitched sounds, treat according to described frequency point data of uttering long and high-pitched sounds the preventative elimination that output sound signal carries out uttering long and high-pitched sounds, when judging to be in the initial stage of uttering long and high-pitched sounds, signal of uttering long and high-pitched sounds in real-time elimination voice signal to be output, described processing module 2 of uttering long and high-pitched sounds can be installed between the amplifier of voice output and loudspeaker, voice signal to be output is after amplifier amplifies, and before loudspeaker export, eliminate the signal being in frequency annex of uttering long and high-pitched sounds in the voice signal after utter long and high-pitched sounds signal or the described amplification of pre-elimination in the voice signal after described amplification, prevent the signal being about to produce the signal of uttering long and high-pitched sounds or be in the initial stage of uttering long and high-pitched sounds from exporting from loudspeaker, can eliminate effectively in time and utter long and high-pitched sounds, improve Consumer's Experience.
Concrete, described in detection module 1 of uttering long and high-pitched sounds comprise sensor unit 11, arithmetic element 12 and transmitting element 13, wherein:
Described sensor unit 11, for sensing the vibration data of loud speaker under real-time mode, described sensor unit 11 comprises acceleration transducer and/or gyroscope, acceleration transducer is directly fixed on loud speaker top can obtain the vibration data of loud speaker with sound variation, and gyroscope is mainly to measure the anglec of rotation, so when sensing not too possesses the loudspeaker vibration information of the anglec of rotation, vibration information need be converted to angle information by some special structures, such as take lever construction, by one end of lever near vibration source, gyroscope is positioned over the other end of lever, the vibration of vibration source drives lever rotation, namely vibration information is convertible into angle information.
Described arithmetic element 12, be connected with described sensor unit 11, vibration data within a certain period of time for sensing described sensor unit 11 carries out computing, to obtain characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more, also can be reduced to corresponding Wave data for analysis according to its parameter.
Described transmitting element 13, be connected with described arithmetic element 12, to utter long and high-pitched sounds described in being sent to by wired or wireless mode for described characteristic that described arithmetic element computing is obtained processing module, because described sending module 13 is to the data after the data bit calculation process of processing module 2 transmission of uttering long and high-pitched sounds, therefore data volume is little, and transmission speed is fast.
In addition, under debugging mode, described sensor unit 11 also for sensing limber up period vibration data, loudspeaker vibration data when described limber up period vibration data comprises system worked well and loudspeaker vibration data when uttering long and high-pitched sounds; Described arithmetic element 12, the vibration data in limber up period in certain hour also for sensing described sensor unit 11 carries out computing, to obtain frequency point data of uttering long and high-pitched sounds; Described transmitting element 13, processor module 2 of uttering long and high-pitched sounds described in the frequency point data of uttering long and high-pitched sounds also for the computing of described arithmetic element 12 being obtained is sent to is preserved.Concrete, wherein, under debugging mode, vibration data when sensor unit 11 first can sense system worked well in a period of time near loudspeaker, then can people utter long and high-pitched sounds a little for searching out, the vibration data of loudspeaker annex when system is uttered long and high-pitched sounds in sensing a period of time is continued to make sensor unit 11, vibration data by vibration data during arithmetic element 12 pairs of system worked well states and when uttering long and high-pitched sounds carries out analytic operation, can calculate and collect major part and to utter long and high-pitched sounds frequency, the frequency of uttering long and high-pitched sounds that described arithmetic element 12 is collected is sent to after processing module 2 of uttering long and high-pitched sounds preserves by described generating unit 13, the control point of uttering long and high-pitched sounds is eliminated after can be used as.
Concrete, described in processing module 2 of uttering long and high-pitched sounds comprise:
Receiving element 21, for receive from described detection module 1 of uttering long and high-pitched sounds characteristic and to utter long and high-pitched sounds frequency point data;
Memory cell 22, is connected with described receiving element 21, for frequency point data of uttering long and high-pitched sounds described in storing;
Judging unit 23, judges whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds according to the characteristic that described receiving element 21 receives; The characteristic of sending from detection module 1 of uttering long and high-pitched sounds in certain hour and described frequency point data of uttering long and high-pitched sounds compare by described judging unit 23, when comprising the data of frequency point data annex of uttering long and high-pitched sounds in described characteristic, can judge by uttering long and high-pitched sounds, such as, frequency of uttering long and high-pitched sounds is 1KHZ, when comprising the frequency point data of 800HZ ~ 900HZ in characteristic, can judge to utter long and high-pitched sounds by mode; And when comprise in described characteristic utter long and high-pitched sounds frequency point data time, namely represent and uttered long and high-pitched sounds, in general, utilize method of the present invention just can be detected at the initial stage of uttering long and high-pitched sounds.In addition, whether the frequency that processor end of uttering long and high-pitched sounds can also calculate the vibrational waveform representated by characteristic is within a certain period of time constant, whether amplitude has becomes large trend gradually, become large gradually when amplitude and reach certain threshold value, just represent and be about to utter long and high-pitched sounds or be in the initial stage of uttering long and high-pitched sounds, wherein, the described initial stage of uttering long and high-pitched sounds is the primary stage just having started to utter long and high-pitched sounds, what utter long and high-pitched sounds is that frequency becomes large gradually fast by little, lower frequency range is in the initial stage of uttering long and high-pitched sounds frequency of uttering long and high-pitched sounds, people's ear can't experience howling, just will utter long and high-pitched sounds at the initial stage of uttering long and high-pitched sounds and judge and eliminate, also can effectively avoid user to experience to utter long and high-pitched sounds, arrive and eliminate the object of uttering long and high-pitched sounds in time.Processing unit 24, is connected with judging unit 23 with described memory cell 22 respectively, for judging by when uttering long and high-pitched sounds at described judging unit 23, treats according to the frequency point data of uttering long and high-pitched sounds prestored in memory cell 22 the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; Or for when described judging unit is judged to be in the initial stage of uttering long and high-pitched sounds, eliminate the signal of uttering long and high-pitched sounds in voice signal to be output in real time.
When practical application, processing unit 24 can according to different application demands, are uttered long and high-pitched sounds by the self-excitation of the mode cancellation microphone of amplitude limit, phase shift, narrow-band filtering, blocking-up, change, minimizing positive feedback path or energy.Therefore, as described in Figure 3, what described processing unit 24 can comprise in clipping unit 241, narrow-band filtering unit 242, oppositely offset unit 244 and phase-shifting unit 243 is one or more.Wherein, described clipping unit 241 for frequency point data of uttering long and high-pitched sounds described in basis to by when uttering long and high-pitched sounds, the signal be in described voice signal to be output near frequency of uttering long and high-pitched sounds carries out amplitude limit, or for utter long and high-pitched sounds the initial stage time signal of uttering long and high-pitched sounds carry out amplitude limit, in the amplitude controlling of the signal that makes the to utter long and high-pitched sounds amplitude range in normal operating conditions reference data; Described narrow-band filtering unit 242 is for carrying out narrow-band filtering to the signal be near frequency of uttering long and high-pitched sounds in the voice signal described to be output be about to when uttering long and high-pitched sounds, or to utter long and high-pitched sounds the initial stage time signal of uttering long and high-pitched sounds carry out narrow-band filtering, be specially the waveform generation narrow band digital filter of uttering long and high-pitched sounds produced according to present situation, filtering is carried out to arrowband; Described reverse offset unit 244 is for oppositely offsetting the signal be near frequency of uttering long and high-pitched sounds in the voice signal described to be output be about to when uttering long and high-pitched sounds, or to utter long and high-pitched sounds the initial stage time signal of uttering long and high-pitched sounds oppositely offset, the waveform of uttering long and high-pitched sounds that the signal of uttering long and high-pitched sounds judged at present is formed is carried out cancelling out each other with former waveform of uttering long and high-pitched sounds oppositely, eliminates utter long and high-pitched sounds completely; Described phase-shifting unit 243 carries out phase shift process for the waveform being about to the signal formation be in the voice signal described to be output when uttering long and high-pitched sounds near frequency of uttering long and high-pitched sounds, or to utter long and high-pitched sounds the initial stage time the waveform that formed of signal of uttering long and high-pitched sounds carry out phase shift process, arrive by destroying the condition of uttering long and high-pitched sounds and producing and suppress the object of uttering long and high-pitched sounds.
The cancellation element of uttering long and high-pitched sounds of the embodiment of the present invention can be supplied to multiple microphone simultaneously and use, to reach the object of uttering long and high-pitched sounds eliminating multiple microphone simultaneously, and uttering long and high-pitched sounds in elimination process, also by the current vibration data of the real-time sensing of sensor unit 11 are sent to processing module 2 of uttering long and high-pitched sounds after arithmetic element 12 processes, whether the processing module 2 that makes to utter long and high-pitched sounds can analyze taked cancellation of uttering long and high-pitched sounds effective.
The embodiment of the present invention, the loudspeaker vibration data sensed by sensor assembly, by described vibration data after data operation, the characteristic comprising frequency, amplitude and envelope data can be obtained, described characteristic is analyzed, not only may be used for judging and eliminate to utter long and high-pitched sounds signal, it can also as the reference data of new product debugging and device upgrade.
Implement the embodiment of the present invention, by the vibration data of sensor assembly sensing loud speaker; Computing is carried out to the described vibration data in certain hour and obtains characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more; Judge whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds according to described characteristic; When judging by when uttering long and high-pitched sounds, treat according to the frequency point data of uttering long and high-pitched sounds prestored the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; When judging to be in the initial stage of uttering long and high-pitched sounds, eliminating in real time the signal of uttering long and high-pitched sounds in voice signal to be output, utilizing the method and apparatus that the embodiment of the present invention provides, the judgement of uttering long and high-pitched sounds and elimination can be realized simply and easily, and cost is low.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (7)
1. utter long and high-pitched sounds judge and eliminate a method, it is characterized in that, comprising:
Under debugging mode:
Sensor assembly sensing limber up period vibration data, loudspeaker vibration data when described limber up period vibration data comprises system worked well and loudspeaker vibration data when uttering long and high-pitched sounds, described sensor assembly comprises acceleration transducer and/or gyroscope;
Carry out computing to the vibration data in certain hour in described limber up period and obtain characteristic, described characteristic comprises Frequency point data, preserve all utter long and high-pitched sounds occur time place Frequency point data as frequency point data of uttering long and high-pitched sounds;
Under normal real-time mode:
By the vibration data of sensor assembly sensing loud speaker;
Computing is carried out to the described vibration data in certain hour and obtains characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more;
Described characteristic and described frequency point data of uttering long and high-pitched sounds are compared thus judges whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds;
When comprising the data near frequency point data of uttering long and high-pitched sounds in described characteristic, judging by uttering long and high-pitched sounds, treating according to the frequency point data of uttering long and high-pitched sounds prestored the preventative elimination that output sound signal carries out uttering long and high-pitched sounds;
When judging to be in the initial stage of uttering long and high-pitched sounds, eliminate the signal of uttering long and high-pitched sounds in voice signal to be output in real time.
2. the method for claim 1, is characterized in that:
When judging by when uttering long and high-pitched sounds, frequency point data that what described basis prestored utter long and high-pitched sounds treats the preventative elimination that output sound signal carries out uttering long and high-pitched sounds, and is specially:
According to described frequency point data of uttering long and high-pitched sounds, amplitude limit is carried out to the signal be near frequency of uttering long and high-pitched sounds in described voice signal to be output, or narrow-band filtering is carried out to it, or it is oppositely offset, or phase shift process is carried out to it, to destroy the condition of uttering long and high-pitched sounds and producing;
When judging to be in the initial stage of uttering long and high-pitched sounds, the signal of uttering long and high-pitched sounds in described real-time elimination voice signal to be output, is specially:
According to described frequency point data of uttering long and high-pitched sounds, amplitude limit is carried out to the signal of uttering long and high-pitched sounds in described voice signal to be output, or narrow-band filtering is carried out to it, or it is oppositely offset, or phase shift process is carried out to it, to destroy the condition of uttering long and high-pitched sounds and producing.
3. utter long and high-pitched sounds and judge and a cancellation element, it is characterized in that, comprising:
To utter long and high-pitched sounds detection module, for sensing loudspeaker vibration data, with the characteristic obtained under normal real-time mode in certain hour and the frequency point data of uttering long and high-pitched sounds obtained under debugging mode in certain hour; Wherein, described characteristic under normal real-time mode, carries out computing to the vibration data of the loud speaker sensed obtain, described characteristic comprise in frequency, amplitude and envelope data one or more; Described frequency point data of uttering long and high-pitched sounds is under debugging mode, sensing limber up period vibration data, loudspeaker vibration data when described limber up period vibration data comprises system worked well and loudspeaker vibration data when uttering long and high-pitched sounds, computing is carried out to vibration data, to utter long and high-pitched sounds frequency point data to obtain, described in detection module of uttering long and high-pitched sounds comprise acceleration transducer and/or gyroscope;
To utter long and high-pitched sounds processing module, compare for characteristic and described frequency point data of uttering long and high-pitched sounds in certain hour that described detection module of uttering long and high-pitched sounds is obtained thus judge whether by uttering long and high-pitched sounds or whether being in the initial stage of uttering long and high-pitched sounds, when comprising the data near frequency point data of uttering long and high-pitched sounds in described characteristic, judging by uttering long and high-pitched sounds, treating according to described frequency point data of uttering long and high-pitched sounds the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; When judging to be in the initial stage of uttering long and high-pitched sounds, eliminate the signal of uttering long and high-pitched sounds in voice signal to be output in real time.
4. device as claimed in claim 3, is characterized in that, described in detection module of uttering long and high-pitched sounds comprise:
Sensor unit, for sensing the vibration data of loud speaker;
Arithmetic element, is connected with described sensor unit, carries out computing for the vibration data within a certain period of time sensed described sensor unit, to obtain characteristic, described characteristic comprise in frequency, amplitude and envelope data one or more;
Transmitting element, is connected with described arithmetic element, processing module of uttering long and high-pitched sounds described in the described characteristic for described arithmetic element computing being obtained is sent to.
5. device as claimed in claim 4, is characterized in that:
Described sensor unit, also under debugging mode, sensing limber up period vibration data, loudspeaker vibration data when described limber up period vibration data comprises system worked well and loudspeaker vibration data when uttering long and high-pitched sounds;
Described arithmetic element, the vibration data in limber up period in certain hour also for sensing described sensor unit carries out computing, to obtain frequency point data of uttering long and high-pitched sounds;
Described transmitting element, processor module of uttering long and high-pitched sounds described in the frequency point data of uttering long and high-pitched sounds also for described arithmetic element computing being obtained is sent to.
6. device as claimed in claim 5, is characterized in that, described in processing module of uttering long and high-pitched sounds comprise:
Receiving element, for receive from described detection module of uttering long and high-pitched sounds characteristic and to utter long and high-pitched sounds frequency point data;
Memory cell, is connected with described receiving element, for frequency point data of uttering long and high-pitched sounds described in storing;
Judging unit, judges whether to be about to utter long and high-pitched sounds or whether be in the initial stage of uttering long and high-pitched sounds according to the characteristic that described receiving element receives;
Processing unit, is connected with judging unit with described memory cell respectively, for judging by when uttering long and high-pitched sounds at described judging unit, treats according to the frequency point data of uttering long and high-pitched sounds prestored the preventative elimination that output sound signal carries out uttering long and high-pitched sounds; Or for when described judging unit is judged to be in the initial stage of uttering long and high-pitched sounds, eliminate the signal of uttering long and high-pitched sounds in voice signal to be output in real time.
7. device as claimed in claim 6, it is characterized in that, described processing unit comprises the clipping unit to being in the signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds in described voice signal to be output and carrying out amplitude limit, to the narrow-band filtering unit being in the signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds in described voice signal to be output and carrying out narrow-band filtering, to being in reverse offset unit that the signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds carry out oppositely offsetting in described voice signal to be output and one or more to what be in described voice signal to be output that signal near frequency of uttering long and high-pitched sounds or signal of uttering long and high-pitched sounds carry out in the phase-shifting unit of phase shift process.
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| CN106488052A (en) * | 2015-08-27 | 2017-03-08 | 成都鼎桥通信技术有限公司 | One kind is uttered long and high-pitched sounds scene recognition method and equipment |
| CN106453762B (en) * | 2016-11-02 | 2019-05-07 | 上海数果科技有限公司 | The processing method and system that voice is uttered long and high-pitched sounds in audio system |
| CN107393551B (en) * | 2017-08-04 | 2021-07-30 | 歌尔科技有限公司 | Audio noise reduction method and device |
| CN108076219B (en) * | 2017-11-28 | 2021-02-26 | Oppo广东移动通信有限公司 | Mobile terminal, method for optimizing audio performance of mobile terminal, and computer-readable storage medium |
| CN108449502B (en) * | 2018-03-12 | 2019-12-10 | Oppo广东移动通信有限公司 | Voice call data processing method and device, storage medium and mobile terminal |
| CN110677796B (en) * | 2019-03-14 | 2021-12-17 | 深圳攀高医疗电子有限公司 | Audio signal processing method and hearing aid |
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| CN1511430A (en) * | 2002-03-12 | 2004-07-07 | 松下电器产业株式会社 | Howling control device and howling control method |
| CN1926911A (en) * | 2004-06-16 | 2007-03-07 | 松下电器产业株式会社 | Howling suppression device, program, integrated circuit, and howling suppression method |
| CN201160320Y (en) * | 2007-04-28 | 2008-12-03 | 佛山市东玛克电子科技有限公司 | Novel DSP automatic notch digital frequency shifter |
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