CN104954934A - Audio play method and electronic equipment - Google Patents
Audio play method and electronic equipment Download PDFInfo
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- CN104954934A CN104954934A CN201410111748.9A CN201410111748A CN104954934A CN 104954934 A CN104954934 A CN 104954934A CN 201410111748 A CN201410111748 A CN 201410111748A CN 104954934 A CN104954934 A CN 104954934A
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Abstract
The invention provides an audio play method and electronic equipment. The method comprises the following steps: detecting whether a signal with a specific frequency is contained in a first audio signal when the first audio signal is played, the specific frequency specifically being a frequency located in the resonant frequency range of the electronic equipment; processing the first audio signal to obtain a second audio signal when the signal with the specific frequency is contained in the first audio signal, a harmonic signal being comprised in the second audio signal and used for replacing the signal with the specific frequency, and the frequency of the harmonic signal being not located in a harmonic frequency range; playing the second audio signal.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of audio frequency playing method and electronic equipment.
Background technology
Along with the fast development of electronic technology, electronic equipment miscellaneous comes out, and has become a requisite part in people's work and life, electronic equipment every field or in all played important effect.Such as utilize electronic equipment audio plays or audio frequency and video.
Because can audio plays, and audio signal comprises the signal of different frequency, so in the signal of these different frequencies, some frequency is just just in time identical with the system resonance frequency of electronic equipment or close, the resonance frequency of the system resonance frequency of the electronic equipment normally physical system of hard disk and/or other hardware, under resonance frequency, system can be done with peak swing and vibrate.Therefore, when audio signal comprises the frequency signal identical or close with system resonance frequency, system will be caused to follow vibration, so so just easily cause the hardware deterioration of electronic equipment larger, serious, electronic equipment also can be caused normally to work, such as: when hard disk resonates, just may cause system in case of system halt or blue screen.
In the prior art, in order to avoid causing system resonance, usually adopt the mode of filtering by the frequency signal filtering identical or close with resonance frequency.
But, the present inventor finds in the process realizing the technical scheme in the embodiment of the present invention, although avoid causing system resonance by the mode of filtering resonance frequency in the prior art, but because some frequency contents in audio signal are by filtering, so the quality of the audio signal exported will reduce, affect the auditory perception of user.
Summary of the invention
The embodiment of the present invention provides a kind of audio frequency playing method and electronic equipment, causes the technical problem of system resonance during in order to solve the playing audio signal existed in prior art.
One aspect of the present invention provides a kind of audio frequency playing method, is applied to an electronic equipment, comprises:
When broadcasting the first audio signal, detect the signal whether including characteristic frequency in described first audio signal, described characteristic frequency is specially the frequency of the resonance frequency range being positioned at described electronic equipment; When including the signal of described characteristic frequency in described first audio signal, carry out process acquisition second audio signal to described first audio signal, described second audio signal comprises a harmonic signal, for replacing the signal of described characteristic frequency; The frequency of wherein said harmonic signal is not positioned at described resonance frequency range; Play described second audio signal.
Optionally, process acquisition second audio signal is carried out to described first audio signal, comprising: the signal of the described characteristic frequency in the first audio signal described in filtering, obtain residual signal; The signal of described characteristic frequency is extracted from described first audio signal; Simulate the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtain described harmonic signal; Wherein, N be greater than 2 positive integer; Described residual signal and described harmonic signal are carried out mixing, obtains described second audio signal.
Optionally, when described first audio signal is the signal of described characteristic frequency, described harmonic signal is described second audio signal, described process acquisition second audio signal is carried out to described first audio signal, comprise: the signal of simulating described characteristic frequency with the N overtones band of described characteristic frequency, obtains described harmonic signal; Wherein, N be greater than 2 positive integer.
Optionally, simulate the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtain described harmonic signal, comprising: the composite signal generating the signal of described characteristic frequency based on described characteristic frequency; Described composite signal comprises the harmonic signal of the signal of described characteristic frequency and the N overtones band of described characteristic frequency; Described harmonic signal is obtained from described composite signal.
The present invention provides a kind of electronic equipment on the other hand, comprising:
Detecting unit, for when broadcasting the first audio signal, detect the signal whether including characteristic frequency in described first audio signal, described characteristic frequency is specially the frequency of the resonance frequency range being positioned at described electronic equipment; Processing unit, for when including the signal of described characteristic frequency in described first audio signal, carry out process acquisition second audio signal to described first audio signal, described second audio signal comprises a harmonic signal, for replacing the signal of described characteristic frequency; The frequency of wherein said harmonic signal is not positioned at described resonance frequency range; Broadcast unit, for playing described second audio signal.
Optionally, described processing unit comprises: the first filter, for the signal of the described characteristic frequency in the first audio signal described in filtering, obtains residual signal; Second filter, for extracting the signal of described characteristic frequency from described first audio signal; Harmonic generator, for simulating the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtains described harmonic signal; Wherein, N be greater than 2 positive integer; Frequency mixer, for described residual signal and described harmonic signal are carried out mixing, obtains described second audio signal.
Optionally, described processing unit comprises: harmonic generator, for simulating the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtains described harmonic signal; Wherein, N be greater than 2 positive integer.
Optionally, described harmonic generator comprises: composite signal generator, for generating the composite signal of the signal of described characteristic frequency based on described characteristic frequency; Described composite signal comprises the harmonic signal of the signal of described characteristic frequency and the N overtones band of described characteristic frequency; 3rd filter, for obtaining described harmonic signal from described composite signal.
The one or more technical schemes provided in the embodiment of the present invention, at least have following technique effect or advantage:
In an embodiment of the present invention, when broadcasting the first audio signal, detect the signal whether including characteristic frequency in the first audio signal, characteristic frequency is specially the frequency of the resonance frequency range being positioned at electronic equipment; When including the signal of characteristic frequency in the first audio signal, carry out process acquisition second audio signal to the first audio signal, the second audio signal comprises a harmonic signal, for replacing the signal of characteristic frequency; Wherein the frequency of harmonic signal is not positioned at resonance frequency range.Also be, in the present embodiment, the signal being positioned at the characteristic frequency of the resonance frequency range of electronic equipment is replaced with harmonic signal, because the frequency of harmonic signal is not positioned at resonance frequency range, so the system resonance of electronic equipment would not be caused, so system works would not be caused abnormal because of resonance.
In the further embodiment of the present invention, with the signal of the N overtones band simulation characteristic frequency of characteristic frequency, obtain this harmonic signal, because be the signal by high frequency harmonic signals simulation characteristic frequency, so when not causing resonance, the auditory perception identical with the signal of characteristic frequency can also be provided, so can ensure that the audio quality exported is higher.
Accompanying drawing explanation
Fig. 1 is the flow chart of the audio frequency playing method in the application one embodiment;
Fig. 2 is the detailed maps of the audio frequency playing method in the application one embodiment;
Fig. 3 is the functional block diagram of the electronic equipment in the application one embodiment;
Fig. 4 is functional block diagram and the signal flow graph of processing unit in the application Fig. 3.
Embodiment
The embodiment of the present invention provides a kind of audio frequency playing method and electronic equipment, causes the technical problem of system resonance during in order to solve the playing audio signal existed in prior art.
Technical scheme in the embodiment of the present invention is solve above-mentioned technical problem, and general thought is as follows:
In an embodiment of the present invention, when broadcasting the first audio signal, detect the signal whether including characteristic frequency in the first audio signal, characteristic frequency is specially the frequency of the resonance frequency range being positioned at electronic equipment; When including the signal of characteristic frequency in the first audio signal, carry out process acquisition second audio signal to the first audio signal, the second audio signal comprises a harmonic signal, for replacing the signal of characteristic frequency; Wherein the frequency of harmonic signal is not positioned at resonance frequency range.Also be, in the present embodiment, the signal being positioned at the characteristic frequency of the resonance frequency range of electronic equipment is replaced with harmonic signal, because the frequency of harmonic signal is not positioned at resonance frequency range, so the system resonance of electronic equipment would not be caused, so system works would not be caused abnormal because of resonance.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete execution mode, technique scheme is described in detail.
The embodiment of the present invention provides a kind of audio frequency playing method, is applied in an electronic equipment, described electronic equipment concrete example notebook computer, panel computer, mobile phone in this way.
Please refer to Fig. 1, next introduce the audio frequency playing method in the present embodiment, the method comprises:
Step 101: when broadcasting the first audio signal, detect the signal whether including characteristic frequency in the first audio signal, characteristic frequency is specially the frequency of the resonance frequency range being positioned at electronic equipment;
Step 102: when including the signal of characteristic frequency in the first audio signal, carry out process acquisition second audio signal to the first audio signal, the second audio signal comprises a harmonic signal, for replacing the signal of characteristic frequency; Wherein the frequency of harmonic signal is not positioned at resonance frequency range.
Step 103: play the second audio signal.
Optionally, electronic equipment, when dispatching from the factory, is tested by research staff, tests out the system resonance frequency of electronic equipment, and can be a concrete value, also can be a frequency range.In the present embodiment, resonance frequency range can be specifically the scope that fluctuates of certain resonance frequency, also can be the set of the multiple resonance frequency of system or resonance frequency range, because generally, a physical system can have multiple resonance frequency.
Specifically when testing, by playing the audio signal of single-frequency, can see whether electronic equipment has operation irregularity, such as, crashing or blue screen, if any, just can determine that this frequency is the resonance frequency of system.
Certainly, in practice, also can be electronic equipment after dispatching from the factory, carried out the mensuration of resonance frequency by user oneself, method of testing also can adopt additive method, as long as can measure resonance frequency range.
Then, when broadcasting the first audio signal, just step 101 is performed: detect the signal whether including characteristic frequency in the first audio signal, namely detect in the first audio signal whether comprise resonance frequency signal.Concrete detection mode, the content be well known to those skilled in the art, so do not repeat them here.
When detect include characteristic frequency in the first audio signal time, just perform step 102, namely the first audio signal is processed, obtain the second audio signal, and the second audio signal comprises a harmonic signal, this harmonic signal is for replacing the signal of characteristic frequency, and the frequency of this harmonic signal is not positioned at resonance frequency range.
Then perform step 103, play the second audio signal, such as, the second audio signal is outputted to loud speaker and play.
Therefore, in the present embodiment, the signal being positioned at the characteristic frequency of the resonance frequency range of electronic equipment is replaced with harmonic signal, because the frequency of harmonic signal is not positioned at resonance frequency range, so the system resonance of electronic equipment would not be caused, so system works would not be caused abnormal because of resonance.
Next the execution mode of step 102 will be introduced in detail.
Please refer to shown in Fig. 2, step 102 comprises: the signal of the characteristic frequency in filtering first audio signal, obtains residual signal; The signal of characteristic frequency is extracted from the first audio signal; With the signal of the N overtones band simulation characteristic frequency of characteristic frequency, obtain harmonic signal; Wherein, N be greater than 2 positive integer; Residual signal and harmonic signal are carried out mixing, obtains the second audio signal.
Wherein, the signal of the characteristic frequency in filtering first audio signal, concrete example utilizes filter to carry out filtering in this way, does not allow the signal of characteristic frequency to pass through, and the signal of other frequencies can pass through.From the first audio signal, extract the signal of characteristic frequency, specifically also can utilize filter to realize, but just in time contrary with previous step, and this filter only allows the signal of characteristic frequency to pass through, and the signal of other frequencies is all filtered out.
Then the signal of the N overtones band simulation characteristic frequency of characteristic frequency is utilized, a kind of possible execution mode replaces characteristic frequency by N frequency multiplication, specifically, audio content does not change, only that frequency changes, so user sounds that pitch and/or tone can change, but the content heard is identical, the content of such as audio frequency is " hello ", after playing back by characteristic frequency, what user heard is more overcast sound, and if after replacing it by N frequency multiplication, after playing back, what user heard is higher, sharp sound.
Another the possible execution mode utilizing the N overtones band of characteristic frequency to simulate the signal of characteristic frequency is: the composite signal generating the signal of characteristic frequency based on characteristic frequency; Composite signal comprises the harmonic signal of the signal of characteristic frequency and the N overtones band of characteristic frequency; Harmonic signal is obtained from composite signal.
Psycho-acoustic technique (psychoacoustic techniques) has an effect, " lingering sound effect ", its principle is: for the complex sound by the harmonious wave component of first-harmonic, if the fundamental frequency of complex sound is very weak, filtered even completely, the tone that its tone still maintains fundamental frequency is constant, and this tone losing fundamental frequency is called as lingering sound.
" lingering sound effect " is utilized in the present embodiment, using characteristic frequency as fundamental frequency, then the harmonic wave of N overtones band is generated, form the complex sound that first-harmonic adds harmonic wave, then by the fundamental frequency in complex sound, namely characteristic frequency filters, just obtain harmonic signal, so the pitch of harmonic signal and/or tone also remain identical with the pitch of characteristic frequency and/or tone, so when the second audio signal is played, the auditory perception of user is almost identical with the auditory perception playing the first audio signal, so by the method in the present embodiment, system resonance can be avoided, can ensure that again the auditory perception of user is not deteriorated.
Wherein, the value of N depends primarily on the resonance frequency of system, as long as the frequency after N times of characteristic frequency is not positioned within resonance frequency range.
And when the first audio signal is the signal of characteristic frequency, namely the first audio signal is the signal of single-frequency, so harmonic signal is just the second audio signal in step 102, so in step 102, process acquisition second audio signal is carried out to the first audio signal, comprise: with the signal of the N overtones band simulation characteristic frequency of characteristic frequency, obtain harmonic signal; Wherein, N be greater than 2 positive integer.
The concrete signal how using the N overtones band simulation characteristic frequency of characteristic frequency, obtains harmonic signal, similar with aforementioned described method, so do not repeat them here.
Based on same inventive concept, the embodiment of the present invention also provides a kind of electronic equipment, as shown in Figure 3 and Figure 4, this electronic equipment comprises: detecting unit 20, for when broadcasting the first audio signal, detect the signal whether including characteristic frequency in the first audio signal, characteristic frequency is specially the frequency of the resonance frequency range being positioned at electronic equipment; Processing unit 30, for when including the signal of characteristic frequency in the first audio signal, carry out process acquisition second audio signal to the first audio signal, the second audio signal comprises a harmonic signal, for replacing the signal of characteristic frequency; Wherein the frequency of harmonic signal is not positioned at resonance frequency range; Broadcast unit 40, for playing the second audio signal.
In one embodiment, processing unit 30 comprises: the first filter 301, for the signal of the characteristic frequency in filtering first audio signal, obtains residual signal; Second filter 302, for extracting the signal of characteristic frequency from the first audio signal; Harmonic generator 303, for the signal of the N overtones band simulation characteristic frequency by characteristic frequency, obtains harmonic signal; Wherein, N be greater than 2 positive integer; Frequency mixer 304, for residual signal and harmonic signal are carried out mixing, obtains the second audio signal.
In another embodiment, when the first audio signal is the signal of characteristic frequency, harmonic signal is the second audio signal, and processing unit 30 comprises: harmonic generator 303, for the signal of the N overtones band simulation characteristic frequency by characteristic frequency, obtains harmonic signal; Wherein, N be greater than 2 positive integer.
In conjunction with above each embodiment, harmonic generator 303 comprises: composite signal generator 3031, for generating the composite signal of the signal of characteristic frequency based on characteristic frequency; Composite signal comprises the harmonic signal of the signal of characteristic frequency and the N overtones band of characteristic frequency; 3rd filter 3032, for obtaining harmonic signal from composite signal.
Further, processing unit 30 also comprises gain amplifier, for amplifying the signal of characteristic frequency, is connected between the second filter 302 and harmonic generator 303.
Broadcast unit 40 concrete example comprises the elements combination of loud speaker, client end of playing back in this way.
In conjunction with above each embodiment, processing unit 30 concrete example is as the pronounciation processing chip for electronic equipment.
Various variation pattern in audio frequency playing method in earlier figures 1 and Fig. 2 embodiment and instantiation are equally applicable to the electronic equipment of the present embodiment, by the aforementioned detailed description to audio frequency playing method, those skilled in the art clearly can know the implementation method of electronic equipment in the present embodiment, so succinct in order to specification, be not described in detail in this.
The one or more technical schemes provided in the embodiment of the present invention, at least have following technique effect or advantage:
In an embodiment of the present invention, when broadcasting the first audio signal, detect the signal whether including characteristic frequency in the first audio signal, characteristic frequency is specially the frequency of the resonance frequency range being positioned at electronic equipment; When including the signal of characteristic frequency in the first audio signal, carry out process acquisition second audio signal to the first audio signal, the second audio signal comprises a harmonic signal, for replacing the signal of characteristic frequency; Wherein the frequency of harmonic signal is not positioned at resonance frequency range.Also be, in the present embodiment, the signal being positioned at the characteristic frequency of the resonance frequency range of electronic equipment is replaced with harmonic signal, because the frequency of harmonic signal is not positioned at resonance frequency range, so the system resonance of electronic equipment would not be caused, so system works would not be caused abnormal because of resonance.
In the further embodiment of the present invention, with the signal of the N overtones band simulation characteristic frequency of characteristic frequency, obtain this harmonic signal, because be the signal by high frequency harmonic signals simulation characteristic frequency, so when not causing resonance, the auditory perception identical with the signal of characteristic frequency can also be provided, so can ensure that the audio quality exported is higher.
Specifically, the computer program instructions that audio frequency playing method in the application Fig. 1 and Fig. 2 embodiment is corresponding can be stored in CD, hard disk, on the storage mediums such as USB flash disk, read by an electronic equipment when the computer program instructions corresponding with audio frequency playing method in storage medium or when being performed, comprise the steps:
When broadcasting the first audio signal, detect the signal whether including characteristic frequency in described first audio signal, described characteristic frequency is specially the frequency of the resonance frequency range being positioned at described electronic equipment;
When including the signal of described characteristic frequency in described first audio signal, carry out process acquisition second audio signal to described first audio signal, described second audio signal comprises a harmonic signal, for replacing the signal of described characteristic frequency; The frequency of wherein said harmonic signal is not positioned at described resonance frequency range;
Play described second audio signal.
Optionally, step: process acquisition second audio signal is carried out to described first audio signal, comprises step:
The signal of the described characteristic frequency in the first audio signal described in filtering, obtains residual signal;
The signal of described characteristic frequency is extracted from described first audio signal;
Simulate the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtain described harmonic signal; Wherein, N be greater than 2 positive integer;
Described residual signal and described harmonic signal are carried out mixing, obtains described second audio signal.
Optionally, when described first audio signal is the signal of described characteristic frequency, described harmonic signal is described second audio signal, step: process acquisition second audio signal is carried out to described first audio signal, comprise step: the signal of simulating described characteristic frequency with the N overtones band of described characteristic frequency, obtains described harmonic signal; Wherein, N be greater than 2 positive integer.
Optionally, step: the signal of simulating described characteristic frequency with the N overtones band of described characteristic frequency, obtains described harmonic signal, comprise step:
The composite signal of the signal of described characteristic frequency is generated based on described characteristic frequency; Described composite signal comprises the harmonic signal of the signal of described characteristic frequency and the N overtones band of described characteristic frequency;
Described harmonic signal is obtained from described composite signal.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. an audio frequency playing method, is applied to an electronic equipment, comprises:
When broadcasting the first audio signal, detect the signal whether including characteristic frequency in described first audio signal, described characteristic frequency is specially the frequency of the resonance frequency range being positioned at described electronic equipment;
When including the signal of described characteristic frequency in described first audio signal, carry out process acquisition second audio signal to described first audio signal, described second audio signal comprises a harmonic signal, for replacing the signal of described characteristic frequency; The frequency of wherein said harmonic signal is not positioned at described resonance frequency range;
Play described second audio signal.
2. the method for claim 1, is characterized in that, carries out process acquisition second audio signal, comprising described first audio signal:
The signal of the described characteristic frequency in the first audio signal described in filtering, obtains residual signal;
The signal of described characteristic frequency is extracted from described first audio signal;
Simulate the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtain described harmonic signal; Wherein, N be greater than 2 positive integer;
Described residual signal and described harmonic signal are carried out mixing, obtains described second audio signal.
3. the method for claim 1, it is characterized in that, when described first audio signal is the signal of described characteristic frequency, described harmonic signal is described second audio signal, described process acquisition second audio signal is carried out to described first audio signal, comprising:
Simulate the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtain described harmonic signal; Wherein, N be greater than 2 positive integer.
4. method as claimed in claim 2 or claim 3, is characterized in that, simulate the signal of described characteristic frequency, obtain described harmonic signal, comprising with the N overtones band of described characteristic frequency:
The composite signal of the signal of described characteristic frequency is generated based on described characteristic frequency; Described composite signal comprises the harmonic signal of the signal of described characteristic frequency and the N overtones band of described characteristic frequency;
Described harmonic signal is obtained from described composite signal.
5. an electronic equipment, comprising:
Detecting unit, for when broadcasting the first audio signal, detect the signal whether including characteristic frequency in described first audio signal, described characteristic frequency is specially the frequency of the resonance frequency range being positioned at described electronic equipment;
Processing unit, for when including the signal of described characteristic frequency in described first audio signal, carry out process acquisition second audio signal to described first audio signal, described second audio signal comprises a harmonic signal, for replacing the signal of described characteristic frequency; The frequency of wherein said harmonic signal is not positioned at described resonance frequency range;
Broadcast unit, for playing described second audio signal.
6. electronic equipment as claimed in claim 5, it is characterized in that, described processing unit comprises:
First filter, for the signal of the described characteristic frequency in the first audio signal described in filtering, obtains residual signal;
Second filter, for extracting the signal of described characteristic frequency from described first audio signal;
Harmonic generator, for simulating the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtains described harmonic signal; Wherein, N be greater than 2 positive integer;
Frequency mixer, for described residual signal and described harmonic signal are carried out mixing, obtains described second audio signal.
7. electronic equipment as claimed in claim 5, it is characterized in that, described processing unit comprises:
Harmonic generator, for simulating the signal of described characteristic frequency with the N overtones band of described characteristic frequency, obtains described harmonic signal; Wherein, N be greater than 2 positive integer.
8. electronic equipment as claimed in claims 6 or 7, it is characterized in that, described harmonic generator comprises:
Composite signal generator, for generating the composite signal of the signal of described characteristic frequency based on described characteristic frequency; Described composite signal comprises the harmonic signal of the signal of described characteristic frequency and the N overtones band of described characteristic frequency;
3rd filter, for obtaining described harmonic signal from described composite signal.
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| CN201410111748.9A CN104954934A (en) | 2014-03-24 | 2014-03-24 | Audio play method and electronic equipment |
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| CN201410111748.9A CN104954934A (en) | 2014-03-24 | 2014-03-24 | Audio play method and electronic equipment |
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