CN202931257U - Filter circuit, telephone audio frequency exporter and system - Google Patents
Filter circuit, telephone audio frequency exporter and system Download PDFInfo
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- CN202931257U CN202931257U CN 201220592254 CN201220592254U CN202931257U CN 202931257 U CN202931257 U CN 202931257U CN 201220592254 CN201220592254 CN 201220592254 CN 201220592254 U CN201220592254 U CN 201220592254U CN 202931257 U CN202931257 U CN 202931257U
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- 230000005236 sound signal Effects 0.000 claims abstract description 54
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 239000013078 crystal Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 15
- 238000009795 derivation Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006386 memory function Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a filter circuit, a telephone audio frequency exporter and a system, wherein the filter circuit is used for filtering an audio signal to extract the low-voltage high frequency component of the audio signal. The filtering circuit comprises a first capacitor, a second capacitor and a third capacitor, wherein one end of the third capacitor is connected with one end of the second capacitor, the other end of the third capacitor is connected with one end of the first capacitor, two ends of the third capacitor are connected with an audio output interface, the other end of the first capacitor is connected with the audio input interface, and the other end of the second capacitor is connected with the audio input interface. According to the filter circuit, the telephone audio frequency exporter and the system, the audio signal of a common telephone is filtered, the low-voltage high frequency component of the audio signal is extracted, the problems in the related technology that the structure of a common telephone is required to be reconstructed to export a conversation with a high fidelity, the complexity is high and the implementation performance is poor are solved, the audio signal is output without reconstructing the structure of the telephone, and the practicality is high.
Description
Technical field
The utility model relates to telephone set and audio collection field, more specifically, relates to a kind of filter circuit, telephone audio exporter and system.
Background technology
In the market plain old telephone in use, if need to be in the situation that do not change the phone body structure high-fidelity of conversing and extract very difficult.The audio frequency high-fidelity derives if correlation technique need to will be conversed on plain old telephone, and realizes audio signal processing function, needs following three kinds of methods:
That (1) changes the phone body structure installs the audio frequency lead-out wire additional, audio signal is accessed relevant device carry out audio frequency and process.Shortcoming: change complexity, easily damage function and the outward appearance of existing equipment, give the user inconvenient.
(2) use the phone body sound amplification function.Sound is put outward, and the recycling relevant device picks up audio signal and processes.The outer playback matter of sound is relatively poor, and can't guarantee that the user exchanges privacy.Adopt the method to carry out audio recording larger with its distortion factor of processing.
(3) directly derive audio signal on telephone line, access related audio dedicated treatment facility.Need interim transformation telephone line, on the other hand owing to having on telephone line than the High Level DC Voltage component, after need to designing again the coherent signal treatment circuit and carrying out carrying out the high-low pressure isolation processing between telephone system and audio processing equipment, just can possess and carry out effective audio frequency processing capacity.Otherwise will be to the working the mischief of telephone system and audio processing equipment, and cause relevant device normally to move.
Conversation high-fidelity derivation with plain old telephone in correlation technique needs transformation phone body structure, be responsible for degree high, and implementation is poor.
The utility model content
The utility model aims to provide a kind of filter circuit, telephone audio exporter and system, to solve at least in correlation technique, the conversation high-fidelity derivation of plain old telephone need to be transformed the phone body structure, is responsible for degree high, and the poor problem of implementation.
According to an aspect of the present utility model, a kind of filter circuit is provided, be used for described audio signal is carried out filtering to extract the low pressure high fdrequency component of described audio signal, comprise: the first electric capacity, the second electric capacity and the 3rd electric capacity, wherein, one end of described the 3rd electric capacity is connected with an end of described the second electric capacity, and the other end of described the 3rd electric capacity is connected with an end of described the first electric capacity; The two ends of described the 3rd electric capacity also are connected with the output interface of audio frequency; The other end of described the first electric capacity is connected with the input interface of audio frequency; The other end of described the second electric capacity is connected with the described input interface of audio frequency.
Preferably, described electric capacity is polarity free capacitor.
Preferably, the capacitance of described the first electric capacity is two times of capacitance of described the 3rd electric capacity, and described the first electric capacity is identical with the capacitance of described the second electric capacity.
Preferably, described the first electric capacity is 2 microfarads, and described the second electric capacity is 2 microfarads, and described the 3rd electric capacity is 1 microfarad.
According to another aspect of the present utility model, a kind of telephone audio exporter is provided, comprising: input interface is used for receiving the audio signal from telephone set; The described filter circuit of above-mentioned any one is used for described audio signal is carried out filtering to extract the low pressure high fdrequency component of described audio signal; Output interface, the described low pressure high fdrequency component that is used for extracting is exported.
Preferably, described telephone audio exporter comprises at least: a described output interface and a described input interface.
Preferably, described input interface comprises: standard crystal interface; Described output interface comprises: USB (Universal SerialBus is referred to as USB) interface or audio sockets.
According to another aspect of the present utility model, a kind of telephone audio guiding system is provided, comprising: telephone set is connected with described telephone audio exporter, for generation of audio signal; Described telephone audio exporter is used for described audio signal is carried out filtering, and with filtered audio signal output; Receiving equipment is used for receiving the audio signal that described telephone audio exporter is exported.
Preferably, described receiving equipment also is used for storage or edits described audio signal.
Preferably, described telephone audio guiding system comprises one or more described telephone sets.
Preferably, described receiving equipment comprises one of following at least: recorder, mobile phone, PC, amplifirer.
The utility model provides a kind of filter circuit, and this filter circuit comprises three electric capacity, and the structural restriction by to the annexation of these three electric capacity has realized the filtering to audio signal.By using the utility model, the audio signal of plain old telephone can be carried out filtering, and extract the low pressure high fdrequency component of audio signal, solved and in the correlation technique, the conversation high-fidelity derivation of plain old telephone need to have been transformed the phone body structure, complexity is high, and the problem that implementation is poor has been accomplished not transform the phone body structure and just audio signal can have been exported, and practicality is high.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of the filter circuit of the utility model embodiment;
Fig. 2 shows the structural representation of the telephone audio exporter of the utility model embodiment;
Fig. 3 shows the structural representation of the telephone audio guiding system of the utility model embodiment;
Fig. 4 shows the structural representation of the telephone audio let-off gear(stand) of the utility model preferred embodiment.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Based in correlation technique, the conversation high-fidelity derivation of plain old telephone being transformed the phone body structure, complexity is high, and the problem that implementation is poor, the utility model embodiment provides a kind of filter circuit, is used for audio signal is carried out filtering to extract the low pressure high fdrequency component of audio signal.The structural representation of this filter circuit comprises as shown in Figure 1:
The first electric capacity 1, the second electric capacity 2 and the 3rd electric capacity 3, wherein, an end of the 3rd electric capacity 3 is connected with an end of the second electric capacity 2, and the other end of the 3rd electric capacity 3 is connected with an end of the first electric capacity 1; The two ends of the 3rd electric capacity 3 also are connected with the output interface of audio frequency; The other end of the first electric capacity 1 is connected with the input interface of audio frequency; The other end of the second electric capacity 2 is connected with the input interface of audio frequency.
The utility model embodiment provides a kind of filter circuit, and this filter circuit comprises three electric capacity, and the structural restriction by to the annexation of these three electric capacity has realized the filtering to audio signal.By using the present embodiment, the audio signal of plain old telephone can be carried out filtering, and extract the low pressure high fdrequency component of audio signal, solved and in the correlation technique, the conversation high-fidelity derivation of plain old telephone need to have been transformed the phone body structure, complexity is high, and the problem that implementation is poor has been accomplished not transform the phone body structure and just audio signal can have been exported, and practicality is high.
State in realization in the process of circuit, electric capacity can be polarity free capacitor, and each electric capacity can reach different effects when different parameters is set.During enforcement, capacitance that can the first electric capacity 1 is set to two times of capacitance of the 3rd electric capacity 3, and the first electric capacity 1 and the capacitance of the second electric capacity 2 be set to identically, and at this moment, the filter effect that reaches is better.For example, be chosen for the first electric capacity 1 of 2 microfarads, be chosen for the second electric capacity 2 of 2 microfarads, be chosen for the 3rd electric capacity 3 of 1 microfarad.Choose output audio signal that can high-fidelity according to above-mentioned setting.
The utility model embodiment also provides a kind of telephone audio exporter, and its structural representation comprises as shown in Figure 2: input interface 10 is used for receiving the audio signal from telephone set; Above-mentioned filter circuit 20 is used for audio signal is carried out filtering to extract the low pressure high fdrequency component of audio signal; Output interface 30 is used for the low pressure high fdrequency component of extracting is exported.
Wherein, the telephone audio exporter comprises at least: an output interface 30 and an input interface 10.Social instantly, because a user may have a plurality of telephone sets, this telephone audio exporter can also be provided with a plurality of input interfaces 10, can guarantee like this access and the audio frequency conversion of a plurality of telephone sets.When realizing, because the existing telephone machine is all by the connection of connecting up of standard water crystal-tipped, so input interface 10 can be standard crystal interface, the access of Convenient telephone set; Output interface 30 can be with USB interface or audio sockets, and different interfaces can be connected different output equipments.
The present embodiment also provides a kind of telephone audio guiding system, and the structural representation of this system comprises as shown in Figure 3:
Telephone set is connected with above-mentioned telephone audio exporter, for generation of audio signal; The telephone audio exporter is used for audio signal is carried out filtering, and with filtered audio signal output; Receiving equipment is used for receiving the audio signal that the telephone audio exporter is exported.
When realizing, receiving equipment can be the equipment with memory function, can be also the equipment with memory function, is used for storage or editor's audio signal, for example, and recorder, mobile phone, PC, amplifirer etc.
Preferred embodiment
In the market plain old telephone in use, if need to will converse that to export to the related audio treatment facility be very difficult to the audio frequency high-fidelity in the situation that do not change the phone body structure.Because current audio interface and telephone line interface (telephone line plug, socket, terminal box etc.) are all the matured products that possesses standard, in passive filter, the associated electrical components and parts are also relatively ripe.The present embodiment is based on above-mentioned background, a kind of telephone audio let-off gear(stand) has been proposed, this device is not in the situation that affect any structure of original phone and occupation mode, the telephone audio high-fidelity is derived, can have access to the high-fidelity of carrying out audio frequency in sound pick-up outfit, computer or the power amplifier sound system of common microphone access interface and record, play or process.Telephone audio is poured out and is not affected the phone user in processing procedure and dial effect, and both sides' speech quality is unaffected.
The structural representation of the telephone audio let-off gear(stand) of the utility model embodiment as shown in Figure 4, audio frequency input is poured out conversion equipment with telephone audio and is connect with telephone line or extension serial ports by standard telephone line crystal head joint and telephone socket; Audio frequency output has the tone frequency channel wire of audio jack by inserting an end, the other end is inserted with the audio processing equipment with the microphone input port, in recorder, computer, power amplification system.Inner C1, C2, C3 consist of passive filter, and audio signal and the audio processing equipment with the high voltage direct current component in telephone system is isolated.Thereby high frequency low voltage signal is extracted, the equipment that input receives, the user can have on the receiving equipment of memory function to its edit, the operation such as modification.
The present embodiment is under the condition that does not change the existing telephone external structure, existing telephone interfacing and designed passive filter and audio socket are combined, realize that telephone audio signal high-fidelity derives the function of recording, reaching telephone relation audio frequency high-fidelity derives and carries out the target of Audio Signal Processing, can use in telephonograph, videoconference and the relevant phone HD Audio that needs and derive the Function Extension that carries out aspect source of sound.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
By using the utility model embodiment, the audio signal of plain old telephone can be carried out filtering, and extract the low pressure high fdrequency component of audio signal, solved and in the correlation technique, the conversation high-fidelity derivation of plain old telephone need to have been transformed the phone body structure, complexity is high, and the problem that implementation is poor has been accomplished not transform the phone body structure and just audio signal can have been exported, the high and low price of practicality.
The above is only preferred embodiment of the present utility model, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (11)
1. a filter circuit, is characterized in that, is used for described audio signal is carried out filtering to extract the low pressure high fdrequency component of described audio signal, comprising:
The first electric capacity (1), the second electric capacity (2) and the 3rd electric capacity (3), wherein, an end of described the 3rd electric capacity (3) is connected with an end of described the second electric capacity (2), and the other end of described the 3rd electric capacity (3) is connected with an end of described the first electric capacity (1); The two ends of described the 3rd electric capacity (3) also are connected with the output interface of audio frequency; The other end of described the first electric capacity (1) is connected with the input interface of audio frequency; The other end of described the second electric capacity (2) is connected with the described input interface of audio frequency.
2. filter circuit according to claim 1, is characterized in that, described electric capacity is polarity free capacitor.
3. filter circuit according to claim 2, is characterized in that, the capacitance of described the first electric capacity (1) is two times of capacitance of described the 3rd electric capacity (3), and described the first electric capacity (1) is identical with the capacitance of described the second electric capacity (2).
4. filter circuit according to claim 3, is characterized in that, described the first electric capacity (1) is 2 microfarads, and described the second electric capacity (2) is 2 microfarads, and described the 3rd electric capacity (3) is 1 microfarad.
5. a telephone audio exporter, is characterized in that, comprising:
Input interface is used for receiving the audio signal from telephone set;
The described filter circuit of any one in claim 1 to 4 is used for described audio signal is carried out filtering to extract the low pressure high fdrequency component of described audio signal;
Output interface, the described low pressure high fdrequency component that is used for extracting is exported.
6. telephone audio exporter according to claim 5, is characterized in that, described telephone audio exporter comprises at least: a described output interface and a described input interface.
7. telephone audio exporter according to claim 6, is characterized in that, described input interface comprises: standard crystal interface; Described output interface comprises: general-purpose serial bus USB interface or audio sockets.
8. a telephone audio guiding system, is characterized in that, comprising:
Telephone set is connected with the described telephone audio exporter of any one in claim 5 to 7, for generation of audio signal;
Described telephone audio exporter is used for described audio signal is carried out filtering, and with filtered audio signal output;
Receiving equipment is used for receiving the audio signal that described telephone audio exporter is exported.
9. system according to claim 8, is characterized in that, described receiving equipment also is used for storage or edits described audio signal.
10. system according to claim 9, is characterized in that, described telephone audio guiding system comprises one or more described telephone sets.
11. any one described system according to claim 8 to 10 is characterized in that, it is one of following that described receiving equipment comprises at least: recorder, mobile phone, PC, amplifirer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220592254 CN202931257U (en) | 2012-11-09 | 2012-11-09 | Filter circuit, telephone audio frequency exporter and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220592254 CN202931257U (en) | 2012-11-09 | 2012-11-09 | Filter circuit, telephone audio frequency exporter and system |
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| Publication Number | Publication Date |
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| CN202931257U true CN202931257U (en) | 2013-05-08 |
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| CN 201220592254 Expired - Fee Related CN202931257U (en) | 2012-11-09 | 2012-11-09 | Filter circuit, telephone audio frequency exporter and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812464A (en) * | 2012-11-09 | 2014-05-21 | 国家电网公司 | Filter circuit, telephone audio leading-out device and system |
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2012
- 2012-11-09 CN CN 201220592254 patent/CN202931257U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812464A (en) * | 2012-11-09 | 2014-05-21 | 国家电网公司 | Filter circuit, telephone audio leading-out device and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20181109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |