CN1929297A - Audio frequency processing system and method - Google Patents
Audio frequency processing system and method Download PDFInfo
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- CN1929297A CN1929297A CN 200510037114 CN200510037114A CN1929297A CN 1929297 A CN1929297 A CN 1929297A CN 200510037114 CN200510037114 CN 200510037114 CN 200510037114 A CN200510037114 A CN 200510037114A CN 1929297 A CN1929297 A CN 1929297A
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Abstract
This invention provides one audio process system, which comprises the following steps: getting output analogue signals; converting analogue signal into digital audio signals; sampling digital audio signals to get multiple vibration values within one set time; according to the values to compute the audio energy sum values; when values sum at certain values to adjust current volume control values. This invention provides one audio process system to automatically adjust current volume to achieve hearing ability when the values at certain level.
Description
[technical field]
The present invention relates to a kind of audio frequency processing system and method, thereby particularly relate to the system and method that a kind of volume according to the management audio frequency processing system is protected hearing.
[background technology]
Along with the development of digital product, hand-held audio-frequence player device is used widely.Yet, in the bigger environment of noise, can cause the user to be difficult to hear the audio signal of serious hope, because can covering the user, noise thirsts for the audio signal heard.
In order to address this problem, many sound-volume control systems and method have appearred on the market.In No. 2003/0123680 patent application document of disclosed US on July 3rd, 2003, it has disclosed a kind of sound-volume control system and method as United States Patent (USP) trademark office.This sound-volume control system comprises a loud speaker, a volume control unit, a decoding unit, a user selection unit, a noise sensitive device, a sound volume setting table and a microcontroller; This volume control unit is used to export a volume control signal; This decoding unit responds this volume control signal with the adjusting volume control value, and the voice signal of exporting after a volume control value is conditioned arrives this loud speaker; This user selection unit is selected an Automatic control of sound volume function; This noise sensitive device induction external noise; This sound volume setting tabular has gone out the volume control value of each level of noise correspondence; This microcontroller is determined a level of noise based on the external noise of this induction, reads the volume control value of this level of noise correspondence that is determined from this sound volume setting table, and this volume control unit of control is to regulate this volume control value.This method for controlling volume comprises step: store a sound volume setting table, this sound volume setting tabular has gone out the volume control value of each level of noise correspondence; The induction external noise; Determine the noise level of this external noise; And, regulate this volume control value according to this level of noise that is determined based on this sound volume setting table.If promptly external noise increases, then the volume control value of output sound increases thereupon.
In the bigger environment of noise, the user will increase volume control value in order to hear the audio signal of serious hope.In addition, the user also can be transferred to volume control value very big when listening to the fast pace music.Yet there is a hearing physical endurance in the user, and promptly (Loudness Discomfort Level LDL), if user's ear is exposed under the environment above this loudness discomfort level for a long time, can damage this user's hearing loudness discomfort level.
[summary of the invention]
In order to protect user's hearing, embodiments of the present invention provide a kind of audio frequency processing system.This system comprises a CPU, a volume control unit, an audio output unit, an A/D converter and a volume administrative unit.This CPU is used for controlling the operation of this each unit of audio frequency processing system.This volume control value cell is set a current volume controlling value; This A/D converter obtains the simulated audio signal that exports this audio output device to, and this simulated audio signal is converted to digital audio and video signals; This volume administrative unit is obtained this digital audio and video signals and this digital audio and video signals is taken a sample, and obtains a plurality of amplitudes in the Preset Time section, then according to these a plurality of amplitudes, calculates the audio power accumulated value in this Preset Time section; And when this audio power accumulated value reaches a default value, send a volume conditioning signal to this volume control unit, turn down the current volume controlling value thereby make this volume control unit respond this volume conditioning signal.
Embodiments of the present invention also provide a kind of audio-frequency processing method, comprise the following steps: to obtain the simulated audio signal of output; This simulated audio signal is converted to digital audio and video signals; This digital audio and video signals is taken a sample, obtain a plurality of amplitudes in the Preset Time section; According to these a plurality of amplitudes, use a mathematical algorithm and calculate the interior audio power accumulated value of this Preset Time section; And when this audio power accumulated value reaches a default value, turn down the current volume controlling value.
Use this audio frequency processing system and method and calculate audio power accumulated value in the Preset Time section, when this audio power accumulated value reaches the limiting value that the user can bear, then turn down the current volume controlling value automatically, thereby reach the purpose of protection hearing user.Below in conjunction with accompanying drawing embodiments of the present invention are described.
[description of drawings]
Fig. 1 is the Organization Chart of audio frequency processing system of the present invention in the execution mode.
Fig. 2 is the module map of volume administrative unit of the present invention in the execution mode.
Fig. 3 is the flow chart of audio plays document traditionally.
Fig. 4 is the flow chart of sound-volume management method of the present invention in the execution mode.
[embodiment]
Be the Organization Chart of present embodiment sound intermediate frequency treatment system 1 as shown in Figure 1.This audio frequency processing system 1 comprises a CPU 10, a memory cell 11, a decoding unit 12, a D/A 13, a volume control unit 14, an amplifier 15, an audio output device 16, an A/D converter 17 and a volume administrative unit 18.The operation of each unit in these CPU 10 these audio frequency processing systems 1 of control.This memory cell 11 stores a plurality of audio files, decoding program and volume hypervisor.This decoding unit 12 reads an audio file, and this audio file of decoding produces a digital audio and video signals, and this digital audio and video signals is sent to this D/A 13.This D/A 13 is converted to simulated audio signal with this digital audio and video signals, and this simulated audio signal is sent to this amplifier 15.This volume control unit 14 is set a current volume controlling value.This amplifier 15 amplifies this simulated audio signal according to this current volume control value, and the simulated audio signal after will amplifying is sent to this audio output device 16.The sound of the simulated audio signal correspondence after this this amplification of audio output device 16 outputs.This audio output device 16 can be an earphone or a loud speaker.This A/D converter 17 obtains the simulated audio signal that exports this audio output device 16 to, and this simulated audio signal is converted to digital audio and video signals.18 pairs of these digital audio and video signals of this volume administrative unit are taken a sample, and obtain a plurality of amplitude m in the Preset Time section T
iThen according to these a plurality of amplitude m
i, use a mathematical algorithm and calculate the interior audio power accumulated value Q of this Preset Time section T; And when this audio power accumulated value Q reaches a default value K (this default value K is the limiting value of the user's ear audio power accumulated value Q that can bear), send a volume conditioning signal to this volume control unit 14, thereby make these volume control value cell 14 these volume conditioning signals of response turn down the current volume controlling value.For example, this mathematical algorithm can be: Q=[∑ (m
i)
2/ N]
1/2(wherein, i from 1 to N), Q represents this audio power accumulated value, N represents to obtain in this Preset Time section T the amplitude m of this digital audio and video signals
iNumber.
Be the module map of present embodiment sound intermediate frequency administrative unit 18 as shown in Figure 2.This volume administrative unit 18 comprises a sampling module 20, a computing module 21 and a volume adjusting module 22.This sampling module 20 is used for this digital audio and video signals of this A/D converter 17 conversions is taken a sample, and obtains a plurality of amplitude m in this Preset Time section T
iThis computing module 21 is used for according to these a plurality of amplitude m
i, use above-mentioned mathematical algorithm and calculate the interior audio power accumulated value Q of this Preset Time section T.This volume adjusting module 22 is used for when this audio power accumulated value Q reaches this default value K, sends a volume conditioning signal to this volume control unit 14, thereby makes these volume control value cell 14 these volume conditioning signals of response turn down the current volume controlling value.
Be the flow chart of audio plays document traditionally as shown in Figure 3.When the user selected an audio documents to play, this CPU 10 read this audio documents (step S30) from this memory cell 11.This decoding unit 11 this audio file of decoding under the control of this CPU 10 produces a digital audio and video signals, and this digital audio and video signals is sent to this D/A 13 (step S31).This D/A 13 is converted to simulated audio signal with this digital audio and video signals, and this simulated audio signal is sent to this amplifier 15 (step S32).This amplifier 15 amplifies this simulated audio signal according to the current volume controlling value, and the simulated audio signal after will amplifying is sent to this audio output device 16 (step S33).The sound (step S34) of these audio output device 16 these simulated audio signal correspondences of output.
Be the flow chart of sound-volume management method in the present embodiment as shown in Figure 4.Under the control of this CPU 10, this A/D converter 17 obtains the simulated audio signal (step S40) that exports this audio output device 16 to; Then this simulated audio signal is converted to digital audio and video signals (step S41).18 pairs of these digital audio and video signals of this volume administrative unit are taken a sample, and obtain a plurality of amplitude m in this Preset Time section T
i(step S42); Then according to these a plurality of amplitude m
i, calculate the audio power accumulated value Q (step S43) in this Preset Time section T; And judge whether this audio power accumulated value Q reaches this default value K (step S44); When this audio power accumulated value Q did not reach this default value K, flow process was returned step S41; And when this audio power accumulated value Q reaches this default value K, this volume administrative unit 18 sends a volume conditioning signal to this volume control unit 14, thereby makes these volume control value cell 14 these volume conditioning signals of response turn down current volume controlling value (step S45).
Claims (8)
1. an audio frequency processing system comprises a CPU, a volume control unit and an audio output device, and this CPU is used for controlling the operation of this each unit of audio frequency processing system, it is characterized in that, this system also comprises:
One A/D converter obtains the simulated audio signal that exports this audio output device to, and this simulated audio signal is converted to digital audio and video signals; And
One volume administrative unit is obtained this digital audio and video signals and this digital audio and video signals is taken a sample, and obtains a plurality of amplitudes in the Preset Time section, then according to this a plurality of amplitudes, calculates the interior audio power accumulated value of this Preset Time section; And when this audio power accumulated value reaches a default value, send a volume conditioning signal to this volume control unit, turn down the current volume controlling value thereby make this volume control unit respond this volume conditioning signal.
2. audio frequency processing system as claimed in claim 1 is characterized in that, this volume administrative unit is used a mathematical algorithm and calculated the interior audio power accumulated value of this Preset Time section.
3. audio frequency processing system as claimed in claim 1 is characterized in that, this default value is the limiting value of the user's ear audio power accumulated value that can bear.
4. audio frequency processing system as claimed in claim 1 is characterized in that, this audio frequency processing system also comprises a memory cell, a decoding unit, a D/A and an amplifier; This memory cell stores a plurality of audio files, decoding program and volume hypervisor; This decoding unit obtains an audio file and this audio file of decoding generates a digital audio and video signals; This D/A is converted to a simulated audio signal with this digital audio and video signals; This amplifier amplifies this simulated audio signal according to the volume control value that this volume control unit is set, thereby and this simulated audio signal is sent to the sound that this audio output device is exported this simulated audio signal correspondence.
5. a sound-volume management method is characterized in that, comprises step:
Obtain the simulated audio signal of output;
This simulated audio signal is converted to digital audio and video signals;
This digital audio and video signals is taken a sample, obtain a plurality of amplitudes in the Preset Time section;
According to these a plurality of amplitudes, calculate the audio power accumulated value in this Preset Time section; And
When this audio power accumulated value reaches a default value, turn down the current volume controlling value.
6. sound-volume management method as claimed in claim 5 is characterized in that, uses a mathematical algorithm and calculates the interior audio power accumulated value of this Preset Time section.
7. sound-volume management method as claimed in claim 5 is characterized in that, this default value is the limiting value of the user's ear audio power accumulated value that can bear.
8. sound-volume management method as claimed in claim 5 is characterized in that, also comprises step: read an audio file and this audio file of decoding generates a digital audio and video signals; Convert this digital audio and video signals to simulated audio signal; Obtain the current volume controlling value and amplify this simulated audio signal, export the sound of this simulated audio signal correspondence then according to this current volume control value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100371144A CN1929297B (en) | 2005-09-07 | 2005-09-07 | Audio frequency processing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100371144A CN1929297B (en) | 2005-09-07 | 2005-09-07 | Audio frequency processing system and method |
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| CN1929297A true CN1929297A (en) | 2007-03-14 |
| CN1929297B CN1929297B (en) | 2010-08-25 |
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| CN2005100371144A Expired - Fee Related CN1929297B (en) | 2005-09-07 | 2005-09-07 | Audio frequency processing system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001588A (en) * | 2011-09-08 | 2013-03-27 | 纬创资通股份有限公司 | Dynamic sound source amplifying circuit and method thereof |
| CN109656511A (en) * | 2018-10-30 | 2019-04-19 | 努比亚技术有限公司 | A kind of audio frequency playing method, terminal and computer readable storage medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440265C (en) * | 2004-04-21 | 2008-12-03 | 郑虎荣 | Eye protective reminding device of gradually incresing reminding sound and tis procedure |
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2005
- 2005-09-07 CN CN2005100371144A patent/CN1929297B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001588A (en) * | 2011-09-08 | 2013-03-27 | 纬创资通股份有限公司 | Dynamic sound source amplifying circuit and method thereof |
| CN109656511A (en) * | 2018-10-30 | 2019-04-19 | 努比亚技术有限公司 | A kind of audio frequency playing method, terminal and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1929297B (en) | 2010-08-25 |
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