CN100580774C - Method and device for eliminating surge in sound recording - Google Patents
Method and device for eliminating surge in sound recording Download PDFInfo
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- CN100580774C CN100580774C CN200510097579A CN200510097579A CN100580774C CN 100580774 C CN100580774 C CN 100580774C CN 200510097579 A CN200510097579 A CN 200510097579A CN 200510097579 A CN200510097579 A CN 200510097579A CN 100580774 C CN100580774 C CN 100580774C
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Abstract
The invention is relates to an eliminating record dash wave method and its device. The method is applied in electron equipment which possesses a microphone which records voice to generate a voice signal, a segment of signal with dash wave is get and compensated by a preset compensation signal to eliminate the dash wave, the signal segment which is after compensation and the leaving segment are combined to form a whole voice signal. The device includes: a signal intercepting unit, a magnifying unit, a compensation unit and a combining unit to combine the signal segment which is after compensation and the leaving segment to form a whole voice signal. So, the facticity and integrality of voice signal can be maintained to improve the recognizing accuracy ratio.
Description
Technical field
The present invention relates to a kind of method and device thereof of eliminating surge in sound recording, particularly relate to a kind of method and device thereof of eliminating the elimination surge in sound recording of the surging that produces on the speech sound signal that electronic equipment records when recording at the beginning.
Background technology
Continuous evolution and lifting along with moving (i.e. action, below all be called mobile) computing are attached to voice identification function such as becoming an important use trend on the mobile electronic devices such as PDA, mobile phone already.
Seeing also shown in Figure 1ly, is the internal circuit block schematic diagram with existing electronic equipment in the past of voice identification function.The speech recognition device 11 that the speech sound signal (a for example voice command) that the existing portable electronic equipment (for example PDA, mobile navigation device or mobile phone etc.) 1 that in the past had voice identification function can be included its microphone 10 is directly delivered to its rear end carries out speech recognition, and the speech sound signal that will finish speech recognition is delivered to the processing unit 12 of its rear end, the corresponding function of voice command execution that it is come out according to identification.
But the microphone 10 of operated by rotary motion on portable electronic equipment but with tradition independently microphone have different electrical specifications, especially work as microphone 10 and just be activated the moment (approximately during preceding 0.7 second) that to record, can make record during this period signal waveform produce huge skew, as shown in Figure 2, it is the speech sound signal oscillogram of a generation surging, this phenomenon is commonly called surging (risingbias), and surging mainly can produce two great influence for the speech recognition of rear end.At first, when the position that surging takes place does not have voice to produce, can allow the speech recognition device 11 misidentification surgings be speech sound signals and cause the erroneous judgement of 11 pairs of sound bites of speech recognition device; Moreover when the position that surging takes place had voice to produce, surging can be superimposed upon on the speech sound signal, destroys the feature of this speech sound signal, makes the speech sound signal distortion, causes the erroneous judgement of 11 pairs of correct voice of speech recognition device.The two all can cause tremendous influence to the accuracy of speech recognition, and thereby reduces the reliability and degree of getting close to of user to voice identification system.
Therefore, a kind of in the past method of eliminating surging forbids that then microphone is started the signal that moment (for example preceding 0.7 second) records to be sent in the speech recognition device, also be about to send into the speech recognition device again after preceding 0.7 second signal fragment cuts out in the speech sound signal and carry out speech recognition, eliminate the influence that surging is known the voice pigtail whereby.But this kind practice promptly has the situation of phonetic entry for the moment that starts at microphone one, then the part sound bite can be cut out together with surging, and still can cause the erroneous judgement of speech recognition device in rear end for imperfect speech sound signal.
This shows that the method for above-mentioned existing elimination surge in sound recording and device thereof obviously still have inconvenience and defective, and demand urgently further being improved in method, product structure and use.In order to solve the method for eliminating surge in sound recording and to install the problem that exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and conventional method and device do not have appropriate method and structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of method and device thereof of new elimination surge in sound recording, just become the current industry utmost point to need improved target.
Because the defective that the method for above-mentioned existing elimination surge in sound recording and device thereof exist, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of method and device thereof of new elimination surge in sound recording, can improve general existing method and device thereof, make it have more practicality.Through constantly research, design, and after studying repeatedly and improving, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the method for existing elimination surge in sound recording and the defective that device exists thereof, and provide a kind of method and device thereof of elimination surge in sound recording of the speech recognition error rate that can effectively reduce portable electronic equipment, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of method of eliminating surge in sound recording according to the present invention's proposition, be applied on the electronic equipment, this electronic equipment has one in order to include voice to produce the microphone of a speech sound signal, the signal section that this method comprises the steps: (A), intercepting produces surging in this speech sound signal; (B), default compensating signature and this signal section compensated computing, to eliminate this surging; And (C), combination through this signal section of over-compensation with through step (A) by a residue speech sound signal of this signal section of intercepting, to form a complete speech sound signal.
The object of the invention to solve the technical problems also adopts following technical measures further to realize.
The method of aforesaid elimination surge in sound recording, in the wherein said step (A), this surging is in schedule time after occurring in this speech sound signal and beginning, and this signal section is meant this speech sound signal in this schedule time.
The method of aforesaid elimination surge in sound recording, in the wherein said step (B), this compensating signature be one with the identical and identical surging signal of surging amplitude and position of length of this signal section.
The method of aforesaid elimination surge in sound recording, in the wherein said step (B), this compensating signature is an and surging position identical with the length of this signal section and amplitude is identical but surging signal that phase place is opposite.
The method of aforesaid elimination surge in sound recording, wherein said compensating signature is in advance by starting this microphone repeatedly to include the no speech sound signal of plural number generation surging, after in the no speech sound signal of these plural numbers, taking out the plural signal section that produces surging via step (A) in advance then, with these plural signal sections totallings and on average, be multiplied by a gain amplifier and produce.
The method of aforesaid elimination surge in sound recording in the wherein said step (B), is by this signal section and this compensating signature are subtracted each other and eliminate surging on this signal section.
The method of aforesaid elimination surge in sound recording in the wherein said step (B), is by with this signal section and this compensating signature addition and eliminate surging on this signal section.
The object of the invention to solve the technical problems also realizes by the following technical solutions.A kind of device of eliminating surge in sound recording according to the present invention's proposition, be arranged on a microphone output terminal of an electronic equipment, in order to receive the speech sound signal by this microphone registers, this device comprises: a signal intercepting unit is used to intercept in this speech sound signal a signal section that produces surging; One amplifying unit is to amplify a default compensating signature according to the gain of this microphone; One compensating unit compensates computing to the compensating signature of this signal section and this amplification, to eliminate the surging in this signal section; And an assembled unit, in order to combination through this signal section of over-compensation with by a residue speech sound signal of this signal section of intercepting, to export a complete speech sound signal.
The object of the invention to solve the technical problems also adopts following technical measures further to realize.
The device of aforesaid elimination surge in sound recording, the compensating signature of wherein said amplification be one with the identical and identical surging signal of surging amplitude and position of length of this signal section.
The device of aforesaid elimination surge in sound recording, the device of wherein said elimination surge in sound recording also comprise surging vector data bank, and this compensating signature is to be pre-stored in this surging vector data bank.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, major technique of the present invention thes contents are as follows:
In order to achieve the above object, the invention provides a kind of method of eliminating surge in sound recording, it is applied on the electronic equipment, this electronic equipment has one in order to include voice to produce the microphone of a speech sound signal, and this method comprises: a signal section that (A) is produced surging by intercepting in this speech sound signal; (B) compensate computing with default compensating signature and this signal section, to eliminate this surging; And (C) combination through this signal section of over-compensation with through step (A) by this residue speech sound signal of this signal section of intercepting, to form a complete speech sound signal.
This surging is in schedule time after occurring in this speech sound signal and beginning, and this signal section is meant this speech sound signal in this schedule time.
This compensating signature be one with the identical and identical surging signal of surging amplitude and position of length of this signal section.
This compensating signature is an and surging position identical with the length of this signal section and amplitude is identical but surging signal that phase place is opposite.
This compensating signature is in advance by starting this microphone repeatedly to include the no speech sound signal of plural number generation surging, then in advance via behind the plural signal section of step (A) by taking-up generation surging in these no speech sound signals, with these signal sections totallings and on average, be multiplied by a gain amplifier and produce.
In step (B), be by this signal section and this compensating signature are subtracted each other and eliminate surging on this signal section.
In step (B), be by with this signal section and this compensating signature addition and eliminate surging on this signal section.
In addition, in order to achieve the above object, the present invention also provides a kind of device in order to the elimination surge in sound recording of realizing said method, is arranged on a microphone output terminal of an electronic equipment, in order to receive the speech sound signal by this microphone registers.This device comprises a signal intercepting unit, an amplifying unit, a compensating unit and an assembled unit.This signal intercepting unit is in order to be produced a signal section of surging by intercepting in this speech sound signal.This amplifying unit is to amplify a default compensating signature according to the gain of this microphone.This compensating unit compensates computing to the compensating signature of this signal section and this amplification, to eliminate the surging in this signal section.This assembled unit is in order to combination this signal section and this residue speech sound signal that is intercepted this signal section through over-compensation, to export a complete speech sound signal.
The compensating signature of this amplification be one with the identical and identical surging signal of surging amplitude and position of length of this signal section.
The device of this elimination surge in sound recording also comprises surging vector data bank, and this compensating signature is to be pre-stored in this surging vector data bank.
By technique scheme, method and device thereof that the present invention eliminates surge in sound recording have following advantage at least: the present invention is by intercepting the fragment signal that surging takes place in the speech sound signal, and compensate computing with a compensating signature of trying to achieve in advance and this fragment signal, to offset surging and the reservation speech sound signal wherein in this fragment signal, make this part phonetic feature can not be subjected to the destruction of surging, and the identification accuracy can effectively promote the rear end and carry out speech recognition the time.
In sum, the invention provides a kind of method and device thereof of elimination surge in sound recording of the speech recognition error rate that can effectively reduce portable electronic equipment.This eliminates the method for surging, be applied on the electronic equipment, this electronic equipment has includes voice to produce the microphone of a speech sound signal, this method comprises the signal section that surging is taken place by intercepting in this speech sound signal, and compensate computing with default compensating signature and this signal section, eliminating the surging on this signal section, and then combination through this signal section of over-compensation with by this residue speech sound signal of this signal section of intercepting, to form a complete speech sound signal; Whereby, can keep the authenticity and the integrality of speech sound signal, and the lifting of the identification accuracy when helping electronic equipment to carry out speech recognition.It has above-mentioned many advantages and practical value, no matter bigger improvement is all arranged on method, product structure or function, have technically than much progress, and produced handy and practical effect, and the method for more existing elimination surge in sound recording and device thereof have the multinomial effect of enhancement, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the internal circuit block schematic diagram with existing electronic equipment in the past of voice identification function.
Fig. 2 is the speech sound signal oscillogram of a generation surging.
Fig. 3 is that an embodiment of the present invention's device of eliminating surge in sound recording is applied in a circuit box synoptic diagram that has on the electronic equipment of voice identification function.
Fig. 4 is the detailed circuit calcspar that present embodiment is eliminated the device of surge in sound recording.
Fig. 5 is that present embodiment is in order to produce the circuit block diagram of compensating signature.
Fig. 6 one has the no speech sound signal oscillogram of surging.
Fig. 7 is the speech sound signal oscillogram after an application present embodiment is eliminated surging.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the method of the elimination surge in sound recording that foundation the present invention is proposed and install its embodiment, method, step, structure, feature and effect thereof, describe in detail as after.
See also shown in Figure 3, be an embodiment of the present invention's device of eliminating surge in sound recording, present embodiment is eliminated the device 3 of surge in sound recording, be arranged on a mobile electronic device 2 with voice identification function (mobile phone for example, mobile navigation device or personal digital assistant mobile devices such as (PDA)) radio reception microphone 20 and carrying out between the speech recognition device 21 of speech recognition, the user can start microphone 20 with input voice (a for example voice command) by pushing a fast key (not shown) default on the electronic equipment 2 usually, and this microphone 20 is being included a voice command from a outside (name normally, one noun or in short) and corresponding the generation behind the speech sound signal, pressed once more up to this fast key promptly by forbidden energy.The speech sound signal that is produced by microphone 20 then is sent to after the device 3 of eliminating surge in sound recording carries out the surging cancel job, just delivers to speech recognition device 21 and carries out the speech recognition operation.Wherein, include an endpoint detection device module (not shown) in the speech recognition device 21, it directly receives external sound signal and differentiates whether the sound of being recorded is a speech sound signal.
Please consulting shown in Figure 4ly again, is the detailed circuit calcspar that present embodiment is eliminated the device of surge in sound recording.The device 3 of the elimination surge in sound recording of present embodiment mainly comprises a signal intercepting unit 31, an amplifying unit 32, a compensating unit 33, an assembled unit 34 and surging vector data bank 37, wherein:
This signal intercepting unit 31, it is connected with microphone 20, in order to receive the speech sound signal 23 by microphone registers, as shown in Figure 2.And owing to be subjected to the influence of microphone 20 congenital electrical specifications, this microphone 20 can be fixed on front position (during for example preceding 0.7 second) the generation surging 24 as shown in Figure 2 of speech sound signal 23 in the moment that is activated at the beginning.Therefore, in order to eliminate surging 24, according to the constant characteristic of surging occurrence positions, signal intercepting unit 31 is when the speech sound signal of receiving from microphone 20 23, can take a sample to speech sound signal 23 earlier, fragment signal 25 (be preceding 0.7 second during signal) with the generation surging of intercepting speech sound signal 23, and in the present embodiment, it is to speech sound signal 23 (11552 points of taking a sample of taking a sample, be equivalent to 0.7 second signal length), the fragment signal 25 that surging will take place is then delivered to compensating unit 33, and it is temporary to be delivered to assembled unit 34 by the residue speech sound signal (being 11552 later signals of sampling spot) 26 of intercepting fragment signal 25.
This amplifying unit 32 is a multiplier in the present embodiment, and it receives a yield value of this microphone 20 and from a compensating signature 29 of surging vector data bank 37.Wherein, this yield value is a parameter, and it is when microphone 20 is activated, the yield value that microphone 20 is set in the reading system wafer and obtaining.This compensating signature 29 is tried to achieve in advance, and its producing method is as follows:
As shown in Figure 5, be that present embodiment is in order to produce the circuit block diagram of compensating signature.At first include the no speech sound signal 27 (about 20～30) that (collection) plural number produces surging (identical with the surging position of above-mentioned speech sound signal) by starting microphone 20 repeatedly, as shown in Figure 6, be one to have the no speech sound signal oscillogram of surging, then these no speech sound signals 27 are delivered to signal intercepting unit 31, make a pair of these no speech sound signals 27 take a sample (getting 11552 points), to intercept the plural fragment signal 28 that includes surging in preceding 0.7 second of these no speech sound signals, then these fragment signals 28 are added up via one and averaging circuit 35 adds up and average after, send into a curve again and modify unit 36 (optionally, not essential) in carry out after waveform modifies, can obtain this compensating signature 29, and this compensating signature 29 is pre-stored in the surging vector data bank 37.Therefore, this compensating signature 29 be actually one with this surging signal that fragment signal 25 length are identical and the surging position is identical.
So, when this compensating signature 29 is admitted to amplifying unit 32, amplifying unit 32 can be according to the microphone gain value (for example gain=3) at that time of yield value of microphone 20 (for example gain=6) and compensating signature 29 generations at that time, this compensating signature 29 is multiplied by a suitable yield value (6/3=2) and its phase place is anti-phase, make that the surging amplitude of the compensating signature 29 ' be exaggerated and fragment signal 25 is identical but phase place is opposite, the compensating signature 29 ' with amplification exports compensating unit 33 to again.
And in the present embodiment, compensating unit 33 is actually a totalizer, so when the compensating signature 29 ' of this amplification is admitted to compensating unit 33 with 25 additions of fragment signal, can offset with the surging addition in the fragment signal 25, and the surging in the elimination fragment signal 25.
In addition, Zhi De being pointed out that, compensating unit 33 is except using totalizer, can also use subtracter to replace, at this moment 29 need of compensating signature are exaggerated and do not need anti-phase, when so the compensating signature that amplifies was admitted in the compensating unit 33 and subtracts each other with fragment signal 25, the surging in the fragment signal 25 then can be because of subtracting each other with compensating signature and being eliminated.
Then, eliminating fragment signal 25 ' behind the surging is transfused in the assembled unit 34 with by the residue speech sound signal 26 of intercepting fragment signal 25 and makes up, after forming a complete speech sound signal 23 ' as shown in Figure 7, just send into and carry out follow-up speech recognition operation in the speech recognition device 21.So, see also shown in Figure 7, it is the speech sound signal oscillogram after an application present embodiment is eliminated surging, show as can be known by Fig. 7, after speech sound signal 23 is handled through the surging cancellation element 3 of present embodiment, really the surging on the speech sound signal 23 ' can be eliminated, and still can keep the speech sound signal feature of originally including.
See also shown in Figure 3ly again, the speech sound signal of finishing speech recognition via speech recognition device 21 can be sent to the processing unit 22 of its rear end, makes the voice that come out according to identification carry out corresponding function.And because the speech recognition process of speech recognition device 21 is in the past a technology and non-technical characterictic of the present invention places, so no longer described in detail at this.
Please consulting shown in the table 1, is not use present embodiment and the front and back experimental data comparison sheet of using present embodiment again.
Table 1
According to experimental data shown in the table 1 as can be known, under the situation of unresolved surging problem still, include repeatedly in 384 nouns (for example name) of being said in turn by two people with microphone, speech recognition device 21 is identification 351 nouns (wrong 33) wherein correctly; And behind the surging of eliminating in the speech sound signal with the device 3 of present embodiment, then in 384 nouns that microphone is included, the speech recognition device is identification 358 nouns (wrong 26) wherein correctly, this shows that present embodiment can upwards revise 7 by 33 with original error rate, that is can reduce the identification error rate of 7/33=21.21%.
In addition, by also finding out in the table 1, in the present embodiment, no matter whether compensating signature has the curve modification processing of modifying unit 36 through curve, the effect that it reached is identical.
Via above-mentioned explanation as can be known, present embodiment is by intercepting the fragment signal 24 that surging takes place in the speech sound signal 23, and compensate computing with a compensating signature of trying to achieve in advance 29 and this fragment signal 25, to offset surging and the reservation speech sound signal wherein in this fragment signal 25, fragment signal 25 ' after will compensating again is combined into complete speech sound signal with the residue speech sound signal 26 that is intercepted fragment signal 25, whereby, not only when eliminating surging, can be retained in the part speech sound signal in this fragment signal, and make this part phonetic feature can not be subjected to the destruction of surging, and the identification accuracy can effectively promote the rear end and carry out speech recognition the time.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, though the present invention is with the preferred embodiment exposure as above, yet be not in order to limit the present invention.
Claims (10)
1, a kind of method of eliminating surge in sound recording is applied to an electronic equipment, and this electronic equipment has one in order to include voice to produce the microphone of a speech sound signal, it is characterized in that this method may further comprise the steps:
(A), a signal section of intercepting generation surging in this speech sound signal;
(B), default compensating signature and this signal section compensated computing, to eliminate this surging; And
(C), combination is through this signal section of over-compensation and a residue speech sound signal that is intercepted this signal section of process step (A), to form a complete speech sound signal.
2, the method for elimination surge in sound recording according to claim 1, it is characterized in that in the wherein said step (A), this surging is in schedule time after occurring in this speech sound signal and beginning, and this signal section is meant this speech sound signal in this schedule time.
3, the method for elimination surge in sound recording according to claim 1 is characterized in that in the wherein said step (B), this compensating signature be one with the identical and identical surging signal of surging amplitude and position of length of this signal section.
4, the method for elimination surge in sound recording according to claim 1 is characterized in that in the wherein said step (B), and this compensating signature is an and surging position identical with the length of this signal section and amplitude is identical but surging signal that phase place is opposite.
5, according to the method for claim 3 or 4 described elimination surge in sound recording, it is characterized in that wherein said compensating signature is in advance by starting this microphone repeatedly to include the no speech sound signal of plural number generation surging, then in advance via step (A) in this plural number do not have in the speech sound signal take out the plural signal section that produces surging after, should plural number signal section add up and average after, be multiplied by a gain amplifier and produce.
6, the method for elimination surge in sound recording according to claim 3 is characterized in that in the wherein said step (B), is by this signal section and this compensating signature are subtracted each other and eliminate surging on this signal section.
7, the method for elimination surge in sound recording according to claim 4 is characterized in that in the wherein said step (B), is by with this signal section and this compensating signature addition and eliminate surging on this signal section.
8, a kind of device of eliminating surge in sound recording is located at a microphone output terminal of an electronic equipment, in order to receive the speech sound signal by this microphone registers, it is characterized in that this device comprises:
One signal intercepting unit is used to intercept in this speech sound signal a signal section that produces surging;
One amplifying unit is to amplify a default compensating signature according to the gain of this microphone;
One compensating unit compensates computing to the compensating signature of this signal section and this amplification, to eliminate the surging in this signal section; And
One assembled unit is in order to combination this signal section and a residue speech sound signal that is intercepted this signal section through over-compensation, to export a complete speech sound signal.
9, the device of elimination surge in sound recording according to claim 8, the compensating signature that it is characterized in that wherein said amplification be one with the identical and identical surging signal of surging amplitude and position of length of this signal section.
10, the device of elimination surge in sound recording according to claim 8 is characterized in that it also comprises surging vector data bank, and this compensating signature is to be pre-stored in this surging vector data bank.
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| CN200510097579A CN100580774C (en) | 2005-12-30 | 2005-12-30 | Method and device for eliminating surge in sound recording |
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| CN200510097579A CN100580774C (en) | 2005-12-30 | 2005-12-30 | Method and device for eliminating surge in sound recording |
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| TWI827997B (en) * | 2021-11-03 | 2024-01-01 | 大陸商星宸科技股份有限公司 | Recording method, and associated integrated circuit |
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