CN101267189A - Automatic volume adjusting device, method and mobile terminal - Google Patents
Automatic volume adjusting device, method and mobile terminal Download PDFInfo
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- CN101267189A CN101267189A CNA2008100274684A CN200810027468A CN101267189A CN 101267189 A CN101267189 A CN 101267189A CN A2008100274684 A CNA2008100274684 A CN A2008100274684A CN 200810027468 A CN200810027468 A CN 200810027468A CN 101267189 A CN101267189 A CN 101267189A
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Abstract
The present invention discloses a sound volume automatic adjusting device which comprises the following components: a decoding module, a sound source reference power testing module, an output gain adjusting module and an audio outputting module. An embodiment of the invention also discloses a mobile terminal which comprises a sound volume automatic adjusting device. The invention also discloses a method for automatically adjusting the sound volume. The invention realizes the continuity and stability of the final output power of the audio output device in the mobile terminal. The user feels that the current sound volume always in a most appropriate value and the visual feeling of the user is better satisfied.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of apparatus for automatically regulating sound volume, method and portable terminal.
Background technology
At present, application relevant with audio frequency on the hand-held terminal device is more and more, for example conversation, MP3 broadcast, video playback or the like; For being applicable to different use scenes, employed audio hardware is also more and more, for example line earphone, receiver, outgoing loudspeaker, bluetooth earphone or the like.But every kind of application and audio hardware equipment all need to carry out volume to be regulated, and makes the user feel that current volume reaches an only value, satisfies user's sense organ impression.And all volume adjustment all are by adjusting the relevant analog circuit of audio frequency on the mobile phone and the gain amplifier of digital circuit, reaching the purpose of adjusting sound output in fact.
It is that the user is according to himself experiencing real-time manual adjustments volume that current basic volume is provided with means, at first terminal equipment has the setting of an acquiescence (perhaps the user is provided with voluntarily) volume rank, corresponding a certain group of power amplifier gain setting, sound at first plays back according to the rank of this acquiescence.Simultaneously (or on earphone) is provided with the volume adjusting key on the mobile phone, if use touch-screen mobile phone then the icon that has volume to regulate, the user can increase or reduce volume by corresponding operation, makes current terminal equipment volume satisfy the sense organ impression of self better.
Yet, there is following defective in above-mentioned existing scheme: 1, for different sources of sound and different use scenes, the volume that the user experienced varies, being provided with at all of acquiescence can't be satisfied all operating positions, the user has to always tirelessly by manually adjusting volume in real time like this, not only bothered but also influenced user's sense organ impression, such as, each audio file has all been set the basic announcement value of self in advance in the process of making, different files, set basic announcement value is different, when the user is using mobile phone (perhaps PC) when carrying out music, will experience the setting of same mobile phone (perhaps PC) volume rank, different file (for example different MP3 song of two head), the volume that plays back just has very big difference.If the user uses mobile phone to listen MP3, often the volume of the first first song is also proper, but to second head just less than normal, perhaps the 3rd head is bigger than normal again, forces user's volume adjustment of having to carry out continually; 2, the corresponding different gain setting of different audio hardware, and the gain inequality between the different audio hardware is very large, such as earphone and outgoing loudspeaker, the former volume power output is just much smaller than the latter, therefore, if the switching of audio frequency output channel takes place between two audio frequency apparatuses, just may have problems.For example, when the user uses receiver to make a phone call mobile phone has been attached in one's ear, if at this moment owing to user's mistake has been pressed Hands-free key or some other reason, mobile phone is sounded from outgoing loudspeaker suddenly, because the sound power that outgoing loudspeaker sends will be far above the power of receiver, ear to the user causes bigger stimulation probably, and is serious even cause customer complaint.
Also have on the current market another kind of technology can the conversation application in automatic regulating volume, its main technical schemes is: mobile phone is measured the far and near distance of user distance mobile phone according to the audio signal of microphone input, if the user distance mobile phone is distant, then the volume power of microphone input is just littler, and at this moment mobile phone can suitably increase volume automatically; If instead the user distance mobile phone is closer, then the volume power of microphone input is just big relatively, and at this moment mobile phone can suitably reduce volume automatically.Yet this technical scheme uses scene very limited, the process of using mobile phone to converse at the user just, and can't solve when the other side passes the volume of coming and changes, mobile phone realizes adjusting automatically in real time the problem of volume power.Such as if the distance of the other side's distance microphone is changing, perhaps the one's voice in speech height is changing, and still can cause local voice output power to adjust automatically in real time well and satisfies user's sense organ impression.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of apparatus for automatically regulating sound volume, method and portable terminal are provided, and has realized that the final power output of audio output apparatus keeps linking up and stablizing.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of apparatus for automatically regulating sound volume, comprising:
Decoder module, being used for will be from the coded audio data decoding of the source of sound of the coded audio data of the source of sound of user conversation or the audio file that the user plays, the voice data of production burst coded modulation PCM form;
Also comprise:
Source of sound reference power detection module is used for choosing the continuous sampling point in a period of time and calculating the reference power of determining current source of sound according to the pairing audio signal amplitude of the voice data of PCM form;
The output gain adjusting module, the reference power that is used for the current source of sound that calculating is determined according to source of sound reference power detection module is adjusted the audio frequency output gain;
The audio frequency output module is used for the power output output audio signal with the adjusted audio frequency output gain of output gain adjusting module correspondence.
The embodiment of the invention provides a kind of portable terminal again, comprises apparatus for automatically regulating sound volume, and described device comprises:
Decoder module, being used for will be from the coded audio data decoding of the source of sound of the coded audio data of the source of sound of user conversation or the audio file that the user plays, the voice data of production burst coded modulation PCM form;
Also comprise:
Source of sound reference power detection module is used for choosing the continuous sampling point in a period of time and calculating the reference power of determining current source of sound according to the pairing audio signal amplitude of the voice data of PCM form;
The output gain adjusting module, the reference power that is used for the current source of sound that calculating is determined according to source of sound reference power detection module is adjusted the audio frequency output gain;
The audio frequency output module is used for the power output output audio signal with the adjusted audio frequency output gain of output gain adjusting module correspondence.
The embodiment of the invention also provides a kind of volume automatic regulating method, may further comprise the steps:
The coded audio data of the source of sound of the audio file that decoding is play from the coded audio data of the source of sound of user's communication or user, the voice data of production burst coded modulation PCM form;
Detect the reference power of current source of sound;
Reference power according to current source of sound is adjusted the audio frequency output gain;
Power output output audio signal with adjusted audio frequency output gain correspondence.
The embodiment of the invention has realized that the final power output of portable terminal sound intermediate frequency output equipment keeps linking up and stablizing, and allows the user feel that current volume is in an only value all the time, satisfies user's sense organ impression better.
Description of drawings
Fig. 1 is the schematic flow sheet of handset audio output in the prior art;
Fig. 2 is the composition schematic diagram of the embodiment of the invention one apparatus for automatically regulating sound volume;
Fig. 3 is the schematic diagram that sampling module is gathered the amplitude of analoging sound signal in the embodiment of the invention one apparatus for automatically regulating sound volume;
Fig. 4 is the schematic flow sheet of the embodiment of the invention three volume automatic regulating methods.
Embodiment
Below with reference to accompanying drawing the preferred embodiments of the present invention are described.
For ease of explanation, the present embodiment portable terminal is an example with the mobile phone, should be appreciated that the embodiment of the invention is not limited to mobile phone, also can be other portable terminal such as PDA.
Please refer to shown in Figure 1ly, the output of the audio frequency of mobile phone substantially all realizes according to following flow process: at first, different sources of sound all can be decoded into the audio coding of unified PCM (Pulse Code Modulation, pulse code modulation) form; Then, the PCM digital signal is carried out filtering and digital processing of amplifying, adjust signal quality; Carry out the D/A conversion after finishing dealing with again, the PCM digital signal is converted to the audio signal of simulation; At last, the use analog circuit carries out the processing of filtering and signal amplification, and signal is exported to different audio output apparatus such as receiver, earphone, outgoing loudspeaker the most at last.Therefore, be not subjected to the influence of music difference for guaranteeing volume that the user experiences, we need to adjust in real time the audio frequency output gain, guarantee that the final power output of a certain special audio output equipment (for example earphone) keeps coherent substantially.
Please refer to shown in Figure 2ly, the embodiment of the invention one apparatus for automatically regulating sound volume comprises: decoder module 1, source of sound reference power detection module 2, output gain adjusting module 3 and audio frequency output module 4.Wherein, be used for will be from the coded audio data decoding of the source of sound of the coded audio data of the source of sound of user conversation or the audio file that the user plays, the voice data of production burst coded modulation PCM form for decoder module 1; Source of sound reference power detection module 2 is used for choosing the continuous sampling point in a period of time and calculating the reference power of determining current source of sound according to the pairing audio signal amplitude of the voice data of described PCM form; Output gain adjusting module 3 is used for calculating according to described source of sound reference power detection module the reference power adjustment audio frequency output gain of the described current source of sound of determining; Audio frequency output module 4 is used for the power output output audio signal with the adjusted audio frequency output gain of described output gain adjusting module correspondence.
The embodiment of the invention two provides a kind of portable terminal, comprises apparatus for automatically regulating sound volume, and this device further comprises decoder module 1, source of sound reference power detection module 2, output gain adjusting module 3 and audio frequency output module 4.Wherein, be used for will be from the coded audio data decoding of the source of sound of the coded audio data of the source of sound of user conversation or the audio file that the user plays, the voice data of production burst coded modulation PCM form for decoder module 1; Source of sound reference power detection module 2 is used for choosing the continuous sampling point in a period of time and calculating the reference power of determining current source of sound according to the pairing audio signal amplitude of the voice data of described PCM form; Output gain adjusting module 3 is used for calculating according to described source of sound reference power detection module the reference power adjustment audio frequency output gain of the described current source of sound of determining; Audio frequency output module 4 is used for the power output output audio signal with the adjusted audio frequency output gain of described output gain adjusting module correspondence.
Source of sound reference power detection module 2 further comprises: sampled point is chosen module 21 and computing module 22; Sampled point is chosen module 21 and is used for choosing continuous sampling point in a period of time according to the pairing audio signal amplitude of the voice data of described PCM form; Computing module 22 is used for calculating the reference power of determining current source of sound according to the audio signal amplitude of the described sampled point of choosing.In addition, source of sound reference power detection module 2 also comprises respectively and chooses quiet threshold value control module 23 and the smoothing windows processing module 24 that module 21 links to each other with sampled point; Quiet threshold value control module 23 is used to filter described sampled point and chooses the audio signal amplitude that is lower than certain quiet threshold value that module is chosen; Smoothing windows processing module 24 is used for selecting the number of the sampled point in the corresponding time period to control the sensitivity that mobile phone volume is regulated according to the audio frequency characteristics of source of sound object.
When the user uses mobile phone communication or playing back music, the decoder module 1 of apparatus for automatically regulating sound volume is decoded from the coded audio data of the source of sound of the coded audio data of the source of sound of user's communication or the audio file that the user plays, and the voice data of production burst coded modulation PCM form; Then, the sampled point of source of sound reference power detection module 2 is chosen module 21 and is chosen continuous sampling point in a period of time according to the pairing audio signal amplitude of the voice data of described PCM form; The computing module 22 of source of sound reference power detection module 2 calculates the reference power of determining current source of sound according to the audio signal amplitude that described sampled point is chosen the sampled point that module 21 chooses again; Then, output gain adjusting module 3 calculates the audio frequency output gain of the reference power adjustment mobile phone of the current source of sound of determining according to described source of sound reference power detection module 2; At last, audio frequency output module 4 is with the power output output audio signal of described output gain adjusting module 3 adjusted audio frequency output gain correspondences.Wherein, the computational process of computing module 22 is averaged then for earlier the audio signal amplitude of the described sampled point of choosing being carried out square; With reference to shown in Figure 3, sampled point is chosen module 21 and is chosen continuous sampling point in a period of time according to the pairing audio signal amplitude of the voice data of PCM form, passes through formula then
Calculate the reference power of current voice signal, V is the audio signal amplitude of the sampled point chosen in the formula, and n is a smoothing windows.Because the audio frequency characteristics of the source of sound object that mobile phone receives has nothing in common with each other, therefore also need make corresponding processing to different audio frequency characteristics, for example quiet situation (in such as communication process the other side not do not speak or MP3 in when song begins or finishes), the embodiment of the invention is screened by the audio signal amplitude V of 23 pairs of sampled points of choosing of quiet threshold value control module, deletes the audio signal amplitude V that is lower than certain quiet threshold value; In addition, the sensitivity that the embodiment of the invention is also regulated by smoothing windows processing module 24 control mobile phone volumes, the size of smoothing windows n has determined the sensitivity that volume is adjusted, n is more little, then the sensitivity of volume adjustment is high more, corresponding to different audio frequency characteristics, use different n values to guarantee the effect that reaches best.For example for conversation, because with in communication process in theory the other side pass the sound size of coming very big-difference should be unable to be arranged, therefore smoothing windows processing module 24 is provided with the n value smaller automatically, like this for the less situation of volume once in a while, can in time obtain correcting; For music files such as MP3, the difference of max volume and minimal volume may be very big in the first song, and smoothing windows processing module 24 is provided with the n value more automatically, is unlikely to guarantee normal volume change that to be adjusted function automatically by volume floating.
In addition, Fig. 4 is the schematic flow sheet of the embodiment of the invention three volume automatic regulating methods, may further comprise the steps:
S401 decodes from the coded audio data of the source of sound of the audio file of the coded audio data of the source of sound of user's communication or user's broadcast, the voice data of production burst coded modulation PCM form;
S402 chooses continuous sampling point in a period of time according to the pairing audio signal amplitude of the voice data of described PCM form;
S403 calculates the reference power of determining current source of sound according to the audio signal amplitude of the described sampled point of choosing;
S404 adjusts the audio frequency output gain according to the reference power of described current source of sound;
S405 is with the power output output audio signal of described adjusted audio frequency output gain correspondence.
Wherein, choose in the process of continuous sampling point, can also filter the audio signal amplitude of the sampled point that is lower than certain quiet threshold value at step S402; Calculate in the process of reference power of current source of sound at step S403, can also select the number of corresponding sampled point to control the sensitivity that mobile phone volume is regulated according to different audio frequency characteristics.The computational process of described step S403 is averaged then for earlier the audio signal amplitude of the described sampled point of choosing being carried out square.
In concrete the enforcement, mobile phone is decoded from the coded audio data of the source of sound of the audio file of the coded audio data of the source of sound of user's communication or user's broadcast, and the voice data of production burst coded modulation PCM form.Then, choose continuous sampling point in a period of time according to the pairing audio signal amplitude of the voice data of described PCM form; In choosing the process of sampled point, because the audio frequency characteristics of the source of sound object that mobile phone receives has nothing in common with each other, therefore also need make corresponding processing to different audio frequency characteristics, for example quiet situation (in such as communication process the other side not do not speak or MP3 in when song begins or finishes), audio signal amplitude to the sampled point chosen is screened, and deletes the audio signal amplitude that is lower than certain quiet threshold value; Then, will carry out square, average then, obtain the reference power of current source of sound, promptly calculate the reference power of current source of sound by following formula through the audio signal amplitude of screening:
V is the audio signal amplitude of the sampled point chosen in the formula, and n is a smoothing windows.In calculation process, can also be by the sensitivity of smoothing windows processing controls mobile phone volume adjusting, the size of smoothing windows n has determined the sensitivity that volume is adjusted, n is more little, then the sensitivity of volume adjustment is high more, corresponding to different audio frequency characteristics, use different n values to guarantee the effect that reaches best.For example for conversation because with in the communication process in theory the other side pass the sound size of coming very big-difference should be unable to be arranged, so smoothing windows handles and is provided with n value smaller automatically, like this for the less situation of volume once in a while, can in time obtain correction; For music files such as MP3, the difference of max volume and minimal volume may be very big in the first song, and smoothing windows is handled and is provided with the n value more automatically, is unlikely to guarantee normal volume change that to be adjusted function automatically by volume floating.And then, adjust the audio frequency output gain according to the reference power of described current source of sound; At last, mobile phone is according to the power output output audio signal of adjusted audio frequency output gain correspondence.
The embodiment of the invention has realized that the final power output of portable terminal sound intermediate frequency output equipment keeps linking up and stablizing, and allows the user feel that current volume is in an only value all the time, satisfies user's sense organ impression better.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1, a kind of volume adjustment device comprises: decoder module, and being used for will be from the coded audio data decoding of the source of sound of the coded audio data of the source of sound of user conversation or the audio file that the user plays, the voice data of production burst coded modulation PCM form; It is characterized in that, also comprise:
Source of sound reference power detection module is used for choosing the continuous sampling point in a period of time and calculating the reference power of determining current source of sound according to the pairing audio signal amplitude of the voice data of described PCM form;
The output gain adjusting module is used for adjusting the audio frequency output gain according to the reference power of the definite described current source of sound of described source of sound reference power detection module calculating;
The audio frequency output module is used for the power output output audio signal with the adjusted audio frequency output gain of described output gain adjusting module correspondence.
2, apparatus for automatically regulating sound volume as claimed in claim 1 is characterized in that, described source of sound reference power detection module comprises:
Sampled point is chosen module, is used for choosing continuous sampling point in a period of time according to the pairing audio signal amplitude of the voice data of described PCM form;
Computing module is used for calculating the reference power of determining current source of sound according to the audio signal amplitude of the described sampled point of choosing.
3, apparatus for automatically regulating sound volume as claimed in claim 2 is characterized in that, described source of sound reference power detection module also comprises:
Quiet threshold value control module is used to filter described sampled point and chooses the audio signal amplitude that is lower than certain quiet threshold value that module is chosen.
4, apparatus for automatically regulating sound volume as claimed in claim 2 is characterized in that, described source of sound reference power detection module also comprises:
The smoothing windows processing module is used for selecting the number of the sampled point in the corresponding time period to control the sensitivity that mobile phone volume is regulated according to the audio frequency characteristics of source of sound object.
As any described apparatus for automatically regulating sound volume of claim 1 to 4, it is characterized in that 5, the computational process of described reference power is averaged then for earlier the audio signal amplitude of the described sampled point of choosing being carried out square.
6, a kind of portable terminal is characterized in that, comprises each described apparatus for automatically regulating sound volume of claim 1 to 5.
7, a kind of volume automatic regulating method is characterized in that, may further comprise the steps:
The coded audio data of the source of sound of the audio file that decoding is play from the coded audio data of the source of sound of user's communication or user, the voice data of production burst coded modulation PCM form;
Detect the reference power of current source of sound;
Reference power according to described current source of sound is adjusted the audio frequency output gain;
Power output output audio signal with described adjusted audio frequency output gain correspondence.
8, volume automatic regulating method as claimed in claim 7 is characterized in that, the step of the reference power of the current source of sound of described detection comprises:
Choose continuous sampling point in a period of time according to the pairing audio signal amplitude of the voice data of described PCM form;
Audio signal amplitude according to the described sampled point of choosing is calculated the reference power of determining current source of sound.
9, volume automatic regulating method as claimed in claim 8 is characterized in that, the step of the reference power of the current source of sound of described detection also comprises:
Filtration is lower than the audio signal amplitude of the sampled point of certain quiet threshold value.
10, volume automatic regulating method as claimed in claim 8 is characterized in that, the step of the reference power of the current source of sound of described detection also comprises:
Select the number of the sampled point in the corresponding time period to control the sensitivity that volume is regulated according to the audio frequency characteristics of source of sound object.
As any described volume automatic regulating method of claim 7 to 10, it is characterized in that 11, the computational process of described reference power is averaged then for earlier the audio signal amplitude of the described sampled point of choosing being carried out square.
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