CN201611572U

CN201611572U - Recording pen with automatic gain function

Info

Publication number: CN201611572U
Application number: CN2009202463106U
Authority: CN
Inventors: 郅伟
Original assignee: Beijing Aigo Digital Storage Technology Co Ltd
Current assignee: Aigo Electronic Technology Co Ltd
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2010-10-20
Anticipated expiration: 2019-09-29

Abstract

The utility model discloses a recording pen with an automatic gain function. The recording pen comprises a voice signal acquisition device, a microcontroller, a memory unit, a voice signal output unit and a gain control unit, wherein the gain control unit is used for receiving voice signals sent by the voice signal acquisition device, conducting gain adjustment on the voice signals, and sending the adjusted voice signals to the microcontroller; and the voice signals are stored in the memory unit by the microcontroller. By adopting the utility model, the signals of too loudly recorded voice is reduced in equal proportion, and the signals with too low recorded voice is amplified in equal proportion, so that the recorded voice is prevented from sonic boom, or the problem of unclear playing due to too low sound volume is solved, and a user can obtain recorded voice with balanced sound volume by using the recording pen.

Description

A kind of recording pen that has the automatic gain function

Technical field

The utility model relates to a kind of recording pen, relates in particular to a kind of recording pen that has the automatic gain function.

Background technology

Along with the development of technology, the memory capacity of recording pen is increasing, can continuous 5 hours with recorded voice, and volume is small and exquisite, conveniently carries.But the wave volume of the recording pen microphone records under the prior art is too big, can be broken, and the sound of recording is too little, the sound that plays out is too little again, can't not hear the content of recording even the user is adjusted to maximum with broadcast sound volume yet, cause a lot of inconvenience to the user.

Therefore, there is defective in prior art, needs further improvement and develops.

The utility model content

The purpose of this utility model is to provide a kind of recording pen that can regulate recorded voice automatically, and the wave volume equilibrium that recording pen is recorded is user-friendly.

The technical solution of the utility model is as follows:

A kind of recording pen that has the automatic gain function, comprise sound signal collecting device, microcontroller, storage unit and voice signal output unit, wherein, also comprise gain control unit, described gain control unit receives the voice signal that described sound signal collecting device sends, and to the voice signal adjustment that gains, and adjusted voice signal sent to described microcontroller, be stored in described storage unit by described microcontroller.

Compared with prior art, the utility model provides the recording pen that has the automatic gain function, adopt gain control unit to the adjustment that automatically gains of the voice signal of recording pen collection, the signal excessive to the sound of recording carries out scaled down, the too small signal of the sound of recording is carried out equal proportion to be amplified, prevent that sonic boom from appearring in recorded voice, the perhaps too small problem that can't clear broadcast of volume, the wave volume that makes the user use recording pen to record is balanced more.

Description of drawings

Fig. 1 is the structural representation of first embodiment of the utility model recording pen;

Fig. 2 is the structural representation of the utility model gain unit;

Fig. 3 is the structural representation of second embodiment of the utility model recording pen;

Fig. 4 is the structural representation of the 3rd embodiment of the utility model recording pen.

Embodiment

Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in further detail.

The utility model provides has automatic gain function recording pen, the simulating signal of sound signal collecting unit collection can be carried out automatic gain control, can be digital signal with the analog signal conversion of sound signal collecting unit collection also, the digital signal after the conversion is carried out automatic gain control; More than two kinds of automatic gain modes can carry out automatic gain control to the sound that recording pen is recorded, reach and prevent that the sound of recording is excessive, can break, the sound of perhaps recording is too small, the unsharp effect of sound during broadcast.

The recording pen 100 that the utility model carries out automatic gain control with the simulating signal of sound signal collecting unit, as shown in Figure 1; The sound signal collecting unit 120 connection mode analog signal amplifying units 140 of described recording pen 100 send to described simulating signal amplifying unit 140 with the analoging sound signal that collects; Described simulating signal amplifying unit 140 receives the simulating signal of sound, and sends to described gain control unit 160 after the simulating signal amplification with sound; Described gain control unit 160 is the speech simulation signal that the receives adjustment that gains, and adjusted speech simulation signal is sent to described A/D converting unit 150; Described A/D converting unit 150 is converted to the analoging sound signal that receives digital stream and sends to described microcontroller 110; Described microcontroller 110 stores the digital stream that receives into described storage unit 170, realizes the recording memory function of recording pen.

Also connect voice signal output unit 180 on the microcontroller 110 described in the utility model, described microcontroller reads the data stream of sound and sends to described voice signal output unit 180 from described storage unit 170 and plays.

Described sound signal collecting of the present utility model unit 120 can be a microphone, and described simulating signal amplifying unit 140 comprises preamplifying circuit and filtering circuit, and the storage medium of described storage unit 170 can be FLASH.

Sound signal collecting described in the utility model unit 120 is converted to these voice signals of current signal, voltage signal or energy signal with the sound vibrations that collects, and concrete form does not limit.

Gain control unit 160 described in the utility model, as shown in Figure 2, comprise the signal input module 161, the gain standard memory module 162 that are connected on the described comparing module 163, described comparing module 163 is connected on the signal output module 165 by adjusting module 164.Described gain standard memory module 162 stores the threshold value that input signal is adjusted, and described threshold value can be voltage threshold, current threshold or energy threshold, and concrete form does not limit.

Signal input module 161 described in the utility model is connected on institute's simulating signal amplifying unit 140, is used to receive the voice signal after described simulating signal amplifying unit 140 amplifies.Described signal input module 161 sends to described comparing module 163 with the voice signal that obtains, described comparing module 163 reads corresponding threshold value according to the form of the voice signal that receives from described gain standard memory module 162, and voice signal that receives and the threshold value that reads are compared.The utility model is that voltage signal is an example with described voice signal, described comparing module 163 compares the amplitude of the voltage signal that receives and the voltage threshold that reads, and the result that will compare, be the amplitude of described voltage signal and the ratio of voltage threshold, and voltage signal, these two signals send to described adjusting module 164.

Described adjusting module 164 utilizes voltage signal and the ratio that receives, and voltage signal is adjusted.Concrete, if the voltage signal that receives greater than described voltage threshold, promptly ratio is greater than 1, described adjusting module 164 makes the maximal value of adjusted voltage signal equal voltage threshold the voltage signal scaled down that receives; If the voltage signal that receives is less than described voltage threshold, promptly ratio is less than 1, and described adjusting module 164 amplifies the voltage signal equal proportion that receives, and makes the maximal value of adjusted voltage signal equal voltage threshold.Adjusting module 164 described in the utility model carries out the equal proportion adjustment with the signal that receives, guaranteed that voice signal can distortion, and the voltage signal in each cycle that described comparing module 163 is received is once compared, the voltage signal in each cycle that described adjusting module 164 will receive is once adjusted, and makes input audio signal obtain the most effective gain control.Described adjusting module 164 sends to described signal output module 165 with adjusted voltage signal, by described signal output module 165 adjusted voltage signal is sent to described A/D converting unit 150.

The recording pen of the utility model band automatic gain function can also carry out gain control with the digital signal of sound, this is concerning the digital signal that stores described recording pen by LINE IN input block into, also can use the function of automatic gain control, the utility model is an example with described recording pen 200, and the device that digital audio signal is carried out automatic gain control is elaborated.

Described recording pen 200 as shown in Figure 3, comprises by gain control unit 160 being connected sound signal collecting device on the microcontroller 110, also comprises the storage unit 170 and the voice signal output unit 180 that are connected on the described microcontroller 110.Described sound signal collecting device can be microphone harvester or LINE IN harvester.When described sound signal collecting device was LINE IN harvester, LINE IN input block 130 directly was connected on the described gain control unit 160.When described sound signal collecting device is the microphone harvester, described microphone harvester comprises sound signal collecting unit 120, simulating signal amplifying unit 140 and the A/D converting unit 150 that connects successively, and described A/D converting unit 150 connects described gain control unit 160.Described sound signal collecting unit 120 is exactly a microphone.

Microphone harvester described in the utility model is the main sound signal collecting mode of recording pen 100; Described microphone 120 sends to described simulating signal amplifying unit 140 with the simulating signal that collects; Described simulating signal amplifying unit 140 amplifies the simulating signal that receives, and sends to described A/D converting unit 150; Described A/D converting unit 150 is that digital signal sends to described gain control unit 160 with the analog signal conversion that receives.

Recording pen 100 of the present utility model can also comprise that LINE IN gathers input block 130, and described LINE IN gathers input block 130 digital audio signal on the outer computer or among the CD is directly sent to described gain control unit 160.

The gain control process of 160 pairs of digital signals of described gain control unit is identical with process with structure to the gain control of simulating signal, and difference is that the threshold value of storing in the described gain standard memory module is the threshold value of digital signal.

The 3rd embodiment of the present utility model, it is recording pen 300, as shown in Figure 4, described recording pen 300 also is the device that digital audio signal is carried out gain control, difference with described recording pen 200 is that described recording pen 300 is integrated in described microcontroller 110 with described gain control unit 160.Can reduce the parts of recording pen like this, help reducing of recording pen volume.

The voice signal that recording pen described in the utility model can receive microphone, and the digital audio signal of LINE IN input block input carries out the gain control of equal proportion, make the wave volume equilibrium of recording, the sound that has solved because of recording is too little, sound is unclear during broadcast, perhaps the broken problem of the too big generation of recorded voice.

Should be understood that above-mentioned statement at the utility model preferred embodiment is comparatively detailed, can not therefore think the restriction to the utility model scope of patent protection, scope of patent protection of the present utility model should be as the criterion with claims.

Claims

1. recording pen that has the automatic gain function, comprise sound signal collecting device, microcontroller, storage unit and voice signal output unit, it is characterized in that, also comprise gain control unit, described gain control unit receives the voice signal that described sound signal collecting device sends, and to the voice signal adjustment that gains, and adjusted voice signal sent to described microcontroller, be stored in described storage unit by described microcontroller.

2. recording pen according to claim 1 is characterized in that, described sound signal collecting device comprises: interconnective sound signal collecting unit and simulating signal amplifying unit, and A/D converting unit;

Described sound signal collecting unit is converted to the sound vibrations that collects the voice signal that comprises current signal, voltage signal or energy signal.

3. recording pen according to claim 2 is characterized in that, described gain control unit is arranged between described simulating signal amplifying unit and the A/D converting unit.

4. recording pen according to claim 2 is characterized in that, described A/D converting unit is connected on the described simulating signal amplifying unit, and described gain control unit is arranged between described A/D converting unit and the described microcontroller.

5. recording pen according to claim 4 is characterized in that described gain control unit is integrated in the described microcontroller.

6. recording pen according to claim 5 is characterized in that, described sound signal collecting device also comprises LINE IN input block, and described LINE IN input block sends to described gain control unit with digital audio signal.

7. according to claim 3 or 6 described recording pens, it is characterized in that described sound signal collecting unit is a microphone.

8. recording pen according to claim 7, it is characterized in that, described gain control unit comprises signal input module, the gain standard memory module that is connected on the described comparing module, and described comparing module is connected on the signal output module by adjusting module;

The threshold value that described gain standard memory module storage is adjusted voice signal, described threshold value comprises current threshold, voltage threshold or energy threshold;

Described signal input module sends to described comparing module with the voice signal that obtains; Described comparing module reads corresponding threshold value according to the voice signal that receives from described gain standard memory module, and the voice signal that receives is compared with the threshold value that reads obtains ratio, and ratio and voice signal are sent to described adjusting module; Described adjusting module sends to described signal output module according to ratio after to the adjustment of voice signal equal proportion, by described signal output module adjusted signal is sent.

9. recording pen according to claim 8 is characterized in that, described threshold value is greater than 1, and described adjusting module is the module with the voltage signal scaled down, and the maximal value of the voltage signal after dwindling is a threshold value; Described threshold value is less than 1, and described adjusting module is the module of voltage signal equal proportion amplification, and the maximal value of the voltage signal after the amplification is a threshold value.

10. recording pen according to claim 9 is characterized in that, described simulating signal amplifying unit comprises preamplifying circuit and filtering circuit.