CN103024125A - Method and mobile communication device for providing optimal acoustic characteristic under hand-free mode - Google Patents
Method and mobile communication device for providing optimal acoustic characteristic under hand-free mode Download PDFInfo
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- CN103024125A CN103024125A CN2011103011555A CN201110301155A CN103024125A CN 103024125 A CN103024125 A CN 103024125A CN 2011103011555 A CN2011103011555 A CN 2011103011555A CN 201110301155 A CN201110301155 A CN 201110301155A CN 103024125 A CN103024125 A CN 103024125A
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Abstract
The invention provides a method for providing an optimal acoustic characteristic under the hand-free mode, and a mobile communication device for providing an optimal acoustic characteristic under the hand-free mode. Under the hand-free mode, the mobile communication device firstly utilizes a distance sensor to detect the distance to a user, and utilizes a gyroscope to detect the angle with the user; and then the mobile communication device applies a group of corresponding audio parameters in plural groups of audio parameters according to the distance detected, and applies a group of corresponding frequency transition functions in plural groups of frequency transition functions according to the angle detected.
Description
Affiliated technical field
The present invention relates to a kind of method and mobile communications device that the optimization acoustic characteristic is provided under hands-free mode, relate in particular to a kind of method and mobile communications device that the optimization acoustic characteristic is provided according to detecting distance and detecting angle under hands-free mode.
Background technology
Mobile communications device is supported hands-free (hands-free) pattern mostly, allows the user when driving or move, and not needing that the microphone of phone is pressed close to ear can converse.Fig. 1 has illustrated a kind of mobile communications device 100 of supporting hands-free mode in the prior art.Mobile communications device 100 comprises a speaker system 110, a microphone system 120, a fundamental frequency chip 130, a processing unit 140, a speech coder 150, and a memory cell 160.Speaker system 110 can comprise the assemblies such as one or more loudspeaker, gain amplifier and filter.Microphone system 120 can comprise the assemblies such as one or more microphones, gain amplifier and filter.Memory cell 160 can store required setting or the data of mobile communications device 100 operations.When the user called by mobile communications device 100, microphone system 120 can receive user's voice signal, and was undertaken being sent to a purpose communication terminal after signal is processed by fundamental frequency chip 130 and speech coder 150.When the user received calls by mobile communications device 100, fundamental frequency chip 130 and speech coder 150 can carry out to the voice signal that first speaker transmits signal to be processed, and sends by speaker system 110 again.
In the mobile communications device 100 of prior art, generally can utilize phantom bead test (artificial head test) to decide default audio frequency parameter and the predeterminated frequency transfer function of mobile communications device 100.Emulation number of people test is across a specific range with the situation when presenting a special angle between emulation user and the mobile communications device 100, determine thus microphone system loudness (the sending loudness rating of mobile communications device 100, SLR) with speaker system loudness (receiving loudness rating, RLR).In general, specific range is 15 centimetres, and special angle is 0 degree (mobile communications device 100 is identical with the height of people's ear), and SLR is between 10dB and 25dB, and RLR is between 10dB and 16dB.Yet, under hands-free mode, the behavior of user's hand-hold mobile communicating device 100 and on-fixed, the interval of user and mobile communications device 100 can exceed or less than specific range sometimes, and the user also might rotary moving communicator 100.In simple terms, the value of SLR and RLR can double and reduces 6dB along with distance, frequency transfer function then with user and mobile communications device 100 between actual range and actual angle relevant.In actual applications, if the distance between user and the mobile communications device 100 is too far away or relative angle is too large, the user possibly can't clearly hear the sound of first speaker, therefore needs manually to adjust volume or the mobile mobile communications device 100 of mobile communications device 100, causes and uses inconvenience.
Summary of the invention
The object of the present invention is to provide a kind of under hands-free mode the method for optimization mobile communications device acoustic characteristic, and a kind of mobile communications device that the optimization acoustic characteristic is provided under hands-free mode.
Of the present invention a kind of under hands-free mode the method for optimization mobile communications device acoustic characteristic, it comprises provides plural groups audio frequency parameter and a plurality of frequency transfer function; Under this hands-free mode, detect a distance and an angle between this mobile communications device and the user; And apply mechanically one group of corresponding audio frequency parameter in this plural groups audio frequency parameter according to this distance, and apply mechanically a corresponding frequency transfer function in these a plurality of frequency transfer functions according to this angle.
A kind of mobile communications device that the optimization acoustic characteristic is provided under hands-free mode of the present invention, it comprises a range sensor, is used for measuring under this hands-free mode the distance between this mobile communications device and the user; One gyroscope is used for measuring the angle between this mobile communications device and this user under this hands-free mode; And a processing unit, it applies mechanically one group of corresponding audio frequency parameter in the plural groups audio frequency parameter according to this distance, and applies mechanically a corresponding frequency transfer function in a plurality of frequency transfer functions according to this angle.
Advantage of the present invention and good effect are as follows:
Under hands-free mode, but the distance between the present invention's User and the mobile communications device and angle are automatically applied mechanically corresponding audio frequency parameter and frequency transfer function.Therefore, when the user changed the behavior of hand-hold mobile communicating device, the present invention can both provide the optimization acoustic characteristic.
Description of drawings
Fig. 1 is the schematic diagram of a kind of mobile communications device in the prior art.
But Fig. 2 is the flow chart of the method for the acoustic characteristic of mobile communications device under a kind of self-optimization hands-free mode among the present invention.
Fig. 3 is the schematic diagram of a kind of mobile communications device among the present invention.
Schematic diagram when Fig. 4 is mobile communications device operation of the present invention.
The primary clustering symbol description:
100,300 mobile communications devices
110,310 speaker systems
120,320 microphone systems
130,330 fundamental frequency chips
140,340 processing units
150,350 speech coders
160,360 memory cell
370 range sensors
380 gyroscopes
390 control units
210～270 steps
Embodiment
The invention will be further described below in conjunction with instantiation and accompanying drawing.
But the explanation of Fig. 2 the method for the acoustic characteristic of mobile communications device under a kind of self-optimization hands-free mode among the present invention, it comprises the following step:
Step 210: plural groups audio frequency parameter and a plurality of frequency transfer function are provided.
Step 220: judge whether a mobile communications device enters hands-free mode: if, execution in step 230; If not, execution in step 220.
Step 230: between detecting user and the mobile communications device apart from d.
Step 240: according to applying mechanically one group of corresponding audio frequency parameter apart from the value of d.
Step 250: the angle θ between detecting user and the mobile communications device.
Step 260: apply mechanically a corresponding frequency transfer function according to the value of angle θ.
Step 270: judge whether mobile communications device leaves hands-free mode: if, execution in step 220; If not, execution in step 230.
Fig. 3 has illustrated a kind of mobile communications device 300 that the optimization acoustic characteristic can be provided among the present invention under hands-free mode, it moves as shown in Figure 2, will be described in detail specification is follow-up.Mobile communications device 300 comprises a speaker system 310, a microphone system 320, a fundamental frequency chip 330, a processing unit 340, a speech coder 350, a memory cell 360, a range sensor 370, a gyroscope 380, and a control unit 390.Speaker system 310 can comprise the assemblies such as one or more loudspeaker, gain amplifier and filter.Microphone system 320 can comprise the assemblies such as one or more microphones, gain amplifier and filter.Memory cell 360 can store required setting or the data of mobile communications device 300 operations.When the user called by mobile communications device 300, microphone system 320 can receive user's voice signal, and was undertaken being sent to a purpose communication terminal after signal is processed by fundamental frequency chip 330 and speech coder 350.When the user received calls by mobile communications device 300, fundamental frequency chip 330 and speech coder 350 can carry out to the voice signal that first speaker transmits signal to be processed, and sends by speaker system 310 again.
In step 210, each group audio frequency parameter can comprise a microphone system loudness SLR, a speaker system loudness RLR, an acoustic echo is eliminated (acoustic echo cancellation, or a noise suppression (noise suppression, NS) etc. AEC).Each the group audio frequency parameter in each parameter value with under different distance, can provide the setting of optimization acoustic characteristic relevant.Suppose d=d
0The time corresponding to one group of default audio frequency parameter (SLR0, RLR0, AEC0, NS0), corresponding and first group of audio frequency parameter (SLR1, RLR1, AEC1, NS1) during d=d1, and d=d
2The time correspond to second group of audio frequency parameter (SLR2, RLR2, AEC2, NS2).If d
2＞d
0＞d
1, SLR2＜SLR0＜SLR1 and RLR2＜RLR0＜RLR1 then, and that acoustic echo is eliminated is relevant with speaker system loudness with corresponding microphone system loudness with the value of noise suppression.
On the other hand, each frequency transfer function can be simultaneously corresponding to the value of distance d and angle θ, and mobile communications device 300 can be set respectively according to the frequency transfer function of applying mechanically the filter coefficient of speaker system 310 and microphone system 320.
When preparing to receive calls or during conversing, the user can an ad hoc fashion presses specific keys switches hands-free mode, for example continuously press-to-talk key three times, continued to push down talk key three seconds, or press mode switching key etc.In the present invention, control unit 390 can be judged the operational mode of mobile communications device 300 according to this.In step 220, when control unit 390 judges that mobile communications device enters hands-free mode, can start range sensor 370 and gyroscope 380 with difference execution in step 230 and 250.
In step 230, range sensor 370 can detect between user and the mobile communications device 300 apart from d.In step 250, the angle θ between user and the mobile communications device 300 is also namely detected in the behavior when gyroscope 380 can be detected user's hand-hold mobile communicating device 300.But the angle θ that detects apart from d and gyroscope 380 that control unit 390 receiving range transducers 370 detect.The 4th figure is the schematic diagram of mobile communications device 300 execution in step 230 of the present invention and 250 o'clock.Ideal distance d when in this embodiment, the test of the emulation number of people is carried out in P0 representative in position
0With desired angle θ
0, and the different behaviors of position P1 and P2 representative of consumer hand-hold mobile communicating device 300, wherein d
1＜d
0＜d
2, and θ
1And θ
2All be not equal to θ
0
In step 240, mobile communications device 300 can be applied mechanically corresponding audio frequency parameter according to the value of distance d.For instance, if be equivalent to a predetermined value (ideal distance d for example apart from the value of d
0), in step 240, can apply mechanically one group of default audio frequency parameter this moment; If apart from the value of d less than predetermined value (d=d for example
1＜d
0), in step 240, can apply mechanically first group of audio frequency parameter this moment; If apart from the value of d greater than predetermined value (d=d for example
2＞d
0), in step 240, can apply mechanically second group of audio frequency parameter this moment.Than default audio frequency parameter, first group of audio frequency parameter can comprise larger SLR/RLR and corresponding acoustic echo elimination/noise suppression; Second group of audio frequency parameter can comprise less SLR/RLR and corresponding acoustic echo elimination/noise suppression.In other words, when user distance mobile communications device 300 was nearer, the present invention can turn down the volume of speaker system 310 and microphone system 320 automatically, and acoustic echo is eliminated or noise suppression is carried out corresponding adjustment; When user distance mobile communications device 300 is far away, but the volume of the present invention's automatic adjustment height speaker system 310 and microphone system 320, and acoustic echo eliminated or noise suppression is carried out corresponding adjustment.
In step 260, mobile communications device 300 can be applied mechanically corresponding frequency transfer function according to the value of angle θ.Frequency transfer function can be simultaneously corresponding to the value of distance d and angle θ, and mobile communications device 300 can be set respectively according to the frequency transfer function of applying mechanically the filter coefficient of speaker system 310 and microphone system 320.
In the embodiment shown in Figure 2, sequentially carry out step 230～260.Yet other embodiment of the present invention also can different order come execution in step 230,240,250 and 260.For example, the present invention can carry out first detecting action, and (first execution in step 230 is execution in step 250, first execution in step 250 execution in step 230 more again, or while execution in step 230 and 250), execution set is with action (first execution in step 240 is execution in step 260, first execution in step 260 execution in step 240 more again, or simultaneously execution in step 240 and 260) again.The execution sequence of step 230～260 not delimit the scope of the invention.
Under hands-free mode, but the distance between the present invention's User and the mobile communications device and angle are automatically applied mechanically corresponding audio frequency parameter and frequency transfer function.Therefore, when the user changed the behavior of hand-hold mobile communicating device, the present invention can both provide the optimization acoustic characteristic.
The above only is preferred embodiment of the present invention, and all equal variation and modifications of making according to claim scope of the present invention all should belong to covering scope of the present invention.
Claims (11)
1. the method for an optimization mobile communications device acoustic characteristic under hands-free mode, it comprises:
Plural groups audio frequency parameter and a plurality of frequency transfer function are provided;
Under this hands-free mode, detect a distance and an angle between this mobile communications device and the user; And
Apply mechanically one group of corresponding audio frequency parameter in this plural groups audio frequency parameter according to this distance, and apply mechanically a corresponding frequency transfer function in these a plurality of frequency transfer functions according to this angle.
2. the method for claim 1 is characterized in that, also comprises: a plurality of distances of estimating between this mobile communications device and this user provide respectively this plural groups audio frequency parameter; And for these a plurality of distance and a plurality of angles of estimating estimated between this mobile communications device and this user, provide respectively this a plurality of frequency transfer functions.
3. the method for claim 1 is characterized in that, also comprises:
Estimate distance for one first between this mobile communications device and this user, provide to comprise one first microphone system loudness, one first speaker system loudness, one first acoustics echo cancellation, or one first group of audio frequency parameter of one first noise suppression; And
Estimate distance for one second between this mobile communications device and this user, provide to comprise a second microphone system loudness, one second speaker system loudness, one second acoustics echo cancellation, or one second group of audio frequency parameter of one second noise suppression;
Wherein, when this first estimate distance greater than this second estimate apart from the time, this first microphone system loudness is less than this second microphone system loudness, and this first speaker system loudness is less than this second speaker system loudness.
4. method as claimed in claim 3, it is characterized in that, this the first acoustics echo cancellation and this first noise suppression are relevant to this first microphone system loudness and this first speaker system loudness, and this second acoustics echo cancellation and this second noise suppression are relevant to this second microphone system loudness and this second speaker system loudness.
5. the method for claim 1 is characterized in that, also comprises the filter coefficient of setting a microphone system and a speaker system in this mobile communications device according to this corresponding frequency transfer function.
6. mobile communications device that the optimization acoustic characteristic is provided under hands-free mode, it comprises:
One range sensor is used for measuring the distance between this mobile communications device and the user under this hands-free mode;
One gyroscope is used for measuring the angle between this mobile communications device and this user under this hands-free mode; And
One processing unit, it applies mechanically one group of corresponding audio frequency parameter in the plural groups audio frequency parameter according to this distance, and applies mechanically a corresponding frequency transfer function in a plurality of frequency transfer functions according to this angle.
7. mobile communications device as claimed in claim 6 is characterized in that, also comprises:
One speaker system, it operates according to this corresponding audio frequency parameter frequency transfer function corresponding with this; And
One microphone system, it operates according to this corresponding audio frequency parameter frequency transfer function corresponding with this.
8. mobile communications device as claimed in claim 6, it is characterized in that, this processing unit system applies mechanically according to this distance and is relevant to a microphone system loudness, a speaker system loudness, acoustic echo elimination, or this of a noise suppression organized corresponding audio frequency parameter.
9. mobile communications device as claimed in claim 6 is characterized in that, this processing unit is set the filter coefficient of this microphone system and this speaker system in addition according to this corresponding frequency transfer function.
10. mobile communications device as claimed in claim 6 is characterized in that, also comprises a memory cell, is used for storing this plural groups audio frequency parameter and these a plurality of frequency transfer functions.
11. mobile communications device as claimed in claim 6 is characterized in that, also comprises a control unit, is used for judging whether this mobile communications device enters this hands-free mode, and should distance be sent to this processing unit with this angle.
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| CN2011103011555A CN103024125A (en) | 2011-09-28 | 2011-09-28 | Method and mobile communication device for providing optimal acoustic characteristic under hand-free mode |
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| CN2011103011555A CN103024125A (en) | 2011-09-28 | 2011-09-28 | Method and mobile communication device for providing optimal acoustic characteristic under hand-free mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106170992A (en) * | 2014-02-27 | 2016-11-30 | Dts（英属维尔京群岛）有限公司 | Object-based audio loudness manages |
| WO2017201868A1 (en) * | 2016-05-26 | 2017-11-30 | 中兴通讯股份有限公司 | Method, apparatus and terminal for adjusting speech gain |
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| CN101030763A (en) * | 2006-03-01 | 2007-09-05 | 华硕电脑股份有限公司 | Moving device and method for dynamically adjusting volume |
| CN101374178A (en) * | 2007-08-21 | 2009-02-25 | 华硕电脑股份有限公司 | Communication device |
| CN101494817A (en) * | 2008-01-22 | 2009-07-29 | 华硕电脑股份有限公司 | Method for detecting and adjusting sound field effect and sound system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101030763A (en) * | 2006-03-01 | 2007-09-05 | 华硕电脑股份有限公司 | Moving device and method for dynamically adjusting volume |
| CN101374178A (en) * | 2007-08-21 | 2009-02-25 | 华硕电脑股份有限公司 | Communication device |
| CN101494817A (en) * | 2008-01-22 | 2009-07-29 | 华硕电脑股份有限公司 | Method for detecting and adjusting sound field effect and sound system thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106170992A (en) * | 2014-02-27 | 2016-11-30 | Dts（英属维尔京群岛）有限公司 | Object-based audio loudness manages |
| WO2017201868A1 (en) * | 2016-05-26 | 2017-11-30 | 中兴通讯股份有限公司 | Method, apparatus and terminal for adjusting speech gain |
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Application publication date: 20130403 |