CN203574845U - Volume controller for speech recognition - Google Patents
Volume controller for speech recognition Download PDFInfo
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- CN203574845U CN203574845U CN201320759663.2U CN201320759663U CN203574845U CN 203574845 U CN203574845 U CN 203574845U CN 201320759663 U CN201320759663 U CN 201320759663U CN 203574845 U CN203574845 U CN 203574845U
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- resistance
- amplifier
- speech recognition
- potentiometer
- volume controller
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Abstract
The utility model discloses a volume controller for speech recognition. The volume controller for the speech recognition includes a first amplifier, a second amplifier, resistors (from a first resistor to a eighth resistor), capacitors (from a first capacitor and a fifth capacitor), a first potentiometer, a second potentiometer, and a power supply; a first end of the first capacitor serves as a signal input end of the volume controller; a second end of the first capacitor is connected to a first end of the first resistor; a second end of the first resistor is respectively connected with a first end of the second resistor, a first end of the third resistor, and an inverted input end of the first amplifier; and a second end of the third resistor is respectively connected to a first end of the second capacitor and an output end of the first amplifier. The utility model relates to the volume controller for the speech recognition, aims to solve the problem that most volume controllers in the prior art are poor in control accuracy and large in power consumption, and realizes the promotion and use value.
Description
Technical field
The utility model relates to a kind of speech recognition device, relates in particular to a kind of volume controller for speech recognition.
Background technology
Before invention on computer, the imagination of automatic speech recognition has just been put on agenda, and early stage vocoder can be considered speech recognition and synthetic blank.And nineteen twenty is speech recognition device the earliest for " Radio Rex " toy dog of producing, when the name of this dog is called, it can eject from base.The speech recognition system based on electronic computer is the earliest that it can identify 10 English digitals by the Audrey speech recognition system of AT & T Bell Laboratory exploitation.Its recognition methods is the formant of following the tracks of in voice.This system has obtained 98% accuracy.To nineteen fifty, for end, the Denes of London institute (Colledge of London) adds grammer probability in speech recognition.
The important breakthrough of speech recognition technology is the application of implicit Markov model Hidden Markov Model.From Baum, propose relevant mathematical reasoning, through the people's such as Labiner research, the Li Kaifu of Carnegie Mellon University has finally realized first large vocabulary speech recognition system Sphinx based on HMM.After this speech recognition technology does not depart from HMM framework strictly speaking.
Although researcher attempts " dictation machine " to promote for many years always, speech recognition technology also cannot be supported unlimited field at present, unlimited speaker's dictation machine application.The application of speech recognition technology can be divided into two developing direction: a direction is large vocabulary Continuous Speech Recognition System, be mainly used in the dictation machine of computer, and the voice messaging inquiry service combining with telephone network or the Internet, these systems all realize on computer platform; The important developing direction of another one is the application of miniaturization, portable voice product, as the application of the aspects such as the voice control of the dialing on wireless phone, automobile equipment, intelligent toy, household remote, these application systems are mostly used special hardware system to realize.
In speech recognition device, can use volume controller, the volume controller of prior art exists accuracy deficiency and the larger problem of power consumption of control mostly.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of volume controller for speech recognition.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of volume controller for speech recognition, comprise the first amplifier, the second amplifier, the first resistance to the eight resistance, the first electric capacity to the five electric capacity, the first potentiometer, the second potentiometer and power supply, the first end of described the first electric capacity is the signal input part of described volume controller, the second end of described the first electric capacity is connected with the first end of described the first resistance, the second end of described the first resistance respectively with the first end of described the second resistance, the first end of described the 3rd resistance is connected with the inverting input of described the first amplifier, the second end of described the 3rd resistance is connected with the first end of described the second electric capacity and the output of described the first amplifier respectively, the second end of described the second amplifier is connected with the first end of described the 4th resistance and the first end of described the 7th resistance respectively, the second end of described the 4th resistance is connected with the first end of described the first potentiometer and the first end of described the 3rd electric capacity respectively, the second end of described the 3rd electric capacity respectively with the sliding end of described the first potentiometer, the first end of described the 4th electric capacity is connected with the first end of described the 6th resistance, the second end of described the first potentiometer is connected with the second end of described the 4th electric capacity and the first end of described the 5th resistance respectively, the second end of described the 6th resistance is connected with the first end of described the 5th electric capacity and the inverting input of described the second amplifier respectively, the second end of described the 5th electric capacity is connected with the sliding end of described the second potentiometer, the first end of described the second potentiometer is connected with the second end of described the 7th resistance, the second end of described the second potentiometer is connected with the first end of described the 8th resistance, the second end of described the 8th resistance is connected with the second end of described the 5th resistance and the output of described the second amplifier respectively, the output of described the second amplifier is the signal output part of described volume controller.
The beneficial effects of the utility model are:
The utility model is a kind of volume controller for speech recognition, and the volume controller that has solved prior art exists accuracy deficiency and the larger problem of power consumption of control mostly, has the value of promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of volume controller for speech recognition of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model is a kind of volume controller for speech recognition, comprise the first amplifier IC1, the second amplifier IC2, the first resistance R 1 is to the 8th resistance R 8, the first capacitor C 1 is to the 5th capacitor C 5, the first potentiometer RP1, the second potentiometer RP2 and power supply, the first end of the first capacitor C 1 is the signal input part of volume controller, the second end of the first capacitor C 1 is connected with the first end of the first resistance R 1, the second end of the first resistance R 1 respectively with the first end of the second resistance R 2, the first end of the 3rd resistance R 3 is connected with the inverting input of the first amplifier IC1, the second end of the 3rd resistance R 3 is connected with the first end of the second capacitor C 2 and the output of the first amplifier IC1 respectively, the second end of the second amplifier IC2 is connected with the first end of the 4th resistance R 4 and the first end of the 7th resistance R 7 respectively, the second end of the 4th resistance R 4 is connected with the first end of the first potentiometer RP1 and the first end of the 3rd capacitor C 3 respectively, the second end of the 3rd capacitor C 3 respectively with the sliding end of the first potentiometer RP1, the first end of the 4th capacitor C 4 is connected with the first end of the 6th resistance R 6, the second end of the first potentiometer RP1 is connected with the second end of the 4th capacitor C 4 and the first end of the 5th resistance R 5 respectively, the second end of the 6th resistance R 6 is connected with the first end of the 5th capacitor C 5 and the inverting input of the second amplifier IC2 respectively, the second end of the 5th capacitor C 5 is connected with the sliding end of the second potentiometer RP2, the first end of the second potentiometer RP2 is connected with the second end of the 7th resistance R 7, the second end of the second potentiometer RP2 is connected with the first end of the 8th resistance R 8, the second end of the 8th resistance R 8 is connected with the second end of the 5th resistance R 5 and the output of the second amplifier IC2 respectively, the output of the second amplifier IC2 is the signal output part of volume controller.
In the utility model, the first amplifier IC1 is buffer amplifier, and the second amplifier IC2 is operational amplifier, and the first amplifier IC1 reduces the burden of prime output, and the low frequency corner frequency of this circuit is 30Hz, and high frequency corner frequency is 1KHz.
Claims (1)
1. the volume controller for speech recognition, it is characterized in that: comprise the first amplifier, the second amplifier, the first resistance to the eight resistance, the first electric capacity to the five electric capacity, the first potentiometer, the second potentiometer and power supply, the first end of described the first electric capacity is the signal input part of described volume controller, the second end of described the first electric capacity is connected with the first end of described the first resistance, the second end of described the first resistance respectively with the first end of described the second resistance, the first end of described the 3rd resistance is connected with the inverting input of described the first amplifier, the second end of described the 3rd resistance is connected with the first end of described the second electric capacity and the output of described the first amplifier respectively, the second end of described the second amplifier is connected with the first end of described the 4th resistance and the first end of described the 7th resistance respectively, the second end of described the 4th resistance is connected with the first end of described the first potentiometer and the first end of described the 3rd electric capacity respectively, the second end of described the 3rd electric capacity respectively with the sliding end of described the first potentiometer, the first end of described the 4th electric capacity is connected with the first end of described the 6th resistance, the second end of described the first potentiometer is connected with the second end of described the 4th electric capacity and the first end of described the 5th resistance respectively, the second end of described the 6th resistance is connected with the first end of described the 5th electric capacity and the inverting input of described the second amplifier respectively, the second end of described the 5th electric capacity is connected with the sliding end of described the second potentiometer, the first end of described the second potentiometer is connected with the second end of described the 7th resistance, the second end of described the second potentiometer is connected with the first end of described the 8th resistance, the second end of described the 8th resistance is connected with the second end of described the 5th resistance and the output of described the second amplifier respectively, the output of described the second amplifier is the signal output part of described volume controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320759663.2U CN203574845U (en) | 2013-11-26 | 2013-11-26 | Volume controller for speech recognition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320759663.2U CN203574845U (en) | 2013-11-26 | 2013-11-26 | Volume controller for speech recognition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203574845U true CN203574845U (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320759663.2U Expired - Fee Related CN203574845U (en) | 2013-11-26 | 2013-11-26 | Volume controller for speech recognition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203574845U (en) |
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2013
- 2013-11-26 CN CN201320759663.2U patent/CN203574845U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140430 Termination date: 20141126 |
|
| EXPY | Termination of patent right or utility model |