CN203563027U - Filter circuit for voice recognizer - Google Patents
Filter circuit for voice recognizer Download PDFInfo
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- CN203563027U CN203563027U CN201320736286.0U CN201320736286U CN203563027U CN 203563027 U CN203563027 U CN 203563027U CN 201320736286 U CN201320736286 U CN 201320736286U CN 203563027 U CN203563027 U CN 203563027U
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Abstract
The utility model discloses a filter circuit for a voice recognizer, which comprises a first amplifier, a second amplifier, a third amplifier, a fourth amplifier, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor. The first end of the second capacitor is functioning as the signal input end of the filter circuit. The second end of the second capacitor is respectively connected with the first end of the first capacitor, the first end of the third capacitor, and the first end of the first resistor. The second end of the first capacitor is grounded. The second end of the third capacitor is respectively connected with the first end of the second resistor and the inverting input end of the first amplifier. The second end of the first capacitor is respectively connected with the second end of the second resistor, the first end of the fourth capacitor and the output end of the first amplifier.
Description
Technical field
The utility model relates to a kind of speech recognition device, relates in particular to a kind of filter circuit for speech recognition device.
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 a kind of filter circuit for speech recognition device, the filter circuit of prior art exists the problem of the lower and unstable working condition of the operating efficiency of filtering.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of filter circuit for speech recognition device.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of filter circuit for speech recognition device, comprise the first amplifier to the four amplifiers, the first electric capacity to the nine electric capacity, the first resistance to the nine resistance, the first end of described the second electric capacity is the signal input part of described filter circuit, the second end of described the second electric capacity respectively with the first end of described the first electric capacity, the first end of described the 3rd electric capacity is connected with the first end of described the first resistance, the second end ground connection of described the first electric capacity, the second end of described the 3rd electric capacity is connected with the first end of described the second resistance and the inverting input of described the first amplifier respectively, the second end of described the first electric capacity respectively with the second end of described the second resistance, the first end of described the 4th electric capacity is connected with the output of described the first amplifier, the in-phase input end ground connection of described the first amplifier, the second end of described the 4th electric capacity respectively with the first end of described the 5th electric capacity, the first end of described the 6th electric capacity is connected with the first end of described the 3rd resistance, the second end ground connection of described the 3rd resistance, the second end of described the 6th electric capacity is connected with the first end of described the 4th resistance and the inverting input of described the second amplifier respectively, the in-phase input end ground connection of described the second amplifier, the second end of described the 5th electric capacity respectively with the second end of described the 4th resistance, the first end of described the 5th resistance, the first end of described the 6th resistance, the first end of described the 7th electric capacity is connected with the output of described the second amplifier, the second end ground connection of described the 7th electric capacity, the second end of described the 5th resistance respectively with the first end of described the 8th electric capacity, the first end of described the 7th resistance is connected with the output of described the 3rd amplifier, the inverting input of described the 3rd amplifier is connected with the second end of described the 6th resistance and the second end of described the 8th electric capacity respectively, the in-phase input end ground connection of described the 3rd amplifier, ground connection after the second end of described the 7th resistance is connected with the first end of described the 8th resistance and the first end of described the 9th resistance respectively, the second end of described the 8th resistance is connected with the first end of described the 9th electric capacity and the output of described the 4th amplifier respectively, the inverting input of described the 4th amplifier is connected with the second end of described the 9th electric capacity and the second end of described the 9th resistance respectively, the in-phase input end ground connection of described the 4th amplifier, the output of described the 4th amplifier is the signal output part of described filter circuit.
The beneficial effects of the utility model are:
The utility model is a kind of filter circuit for speech recognition device, has solved the problem of the lower and unstable working condition of the operating efficiency of the filtering that the filter circuit of prior art exists, and has the value of promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of filter circuit for speech recognition device 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 filter circuit for speech recognition device, comprise the first amplifier IC1 to the four amplifier IC4, the first capacitor C 1 is to the 9th capacitor C 9, the first resistance R 1 is to the 9th resistance R 9, the first end of the second capacitor C 2 is the signal input part of filter circuit, the second end of the second capacitor C 2 respectively with the first end of the first capacitor C 1, the first end of the 3rd capacitor C 3 is connected with the first end of the first resistance R 1, the second end ground connection of the first capacitor C 1, the second end of the 3rd capacitor C 3 is connected with the first end of the second resistance R 2 and the inverting input of the first amplifier IC1 respectively, the second end of the first capacitor C 1 respectively with the second end of the second resistance R 2, the first end of the 4th capacitor C 4 is connected with the output of the first amplifier IC1, the in-phase input end ground connection of the first amplifier IC1, the second end of the 4th capacitor C 4 respectively with the first end of the 5th capacitor C 5, the first end of the 6th capacitor C 6 is connected with the first end of the 3rd resistance R 3, the second end ground connection of the 3rd resistance R 3, the second end of the 6th capacitor C 6 is connected with the first end of the 4th resistance R 4 and the inverting input of the second amplifier IC2 respectively, the in-phase input end ground connection of the second amplifier IC2, the second end of the 5th capacitor C 5 respectively with the second end of the 4th resistance R 4, the first end of the 5th resistance R 5, the first end of the 6th resistance R 6, the first end of the 7th capacitor C 7 is connected with the output of the second amplifier IC2, the second end ground connection of the 7th capacitor C 7, the second end of the 5th resistance R 5 respectively with the first end of the 8th capacitor C 8, the first end of the 7th resistance R 7 is connected with the output of the 3rd amplifier IC3, the inverting input of the 3rd amplifier IC3 is connected with the second end of the 6th resistance R 6 and the second end of the 8th capacitor C 8 respectively, the in-phase input end ground connection of the 3rd amplifier IC3, ground connection after the second end of the 7th resistance R 7 is connected with the first end of the 8th resistance R 8 and the first end of the 9th resistance R 9 respectively, the second end of the 8th resistance R 8 is connected with the first end of the 9th capacitor C 9 and the output of the 4th amplifier IC4 respectively, the inverting input of the 4th amplifier IC4 is connected with the second end of the 9th capacitor C 9 and the second end of the 9th resistance R 9 respectively, the in-phase input end ground connection of the 4th amplifier IC4, the output of the 4th amplifier IC4 is the signal output part of filter circuit.
Claims (1)
1. the filter circuit for speech recognition device, it is characterized in that: comprise the first amplifier to the four amplifiers, the first electric capacity to the nine electric capacity, the first resistance to the nine resistance, the first end of described the second electric capacity is the signal input part of described filter circuit, the second end of described the second electric capacity respectively with the first end of described the first electric capacity, the first end of described the 3rd electric capacity is connected with the first end of described the first resistance, the second end ground connection of described the first electric capacity, the second end of described the 3rd electric capacity is connected with the first end of described the second resistance and the inverting input of described the first amplifier respectively, the second end of described the first electric capacity respectively with the second end of described the second resistance, the first end of described the 4th electric capacity is connected with the output of described the first amplifier, the in-phase input end ground connection of described the first amplifier, the second end of described the 4th electric capacity respectively with the first end of described the 5th electric capacity, the first end of described the 6th electric capacity is connected with the first end of described the 3rd resistance, the second end ground connection of described the 3rd resistance, the second end of described the 6th electric capacity is connected with the first end of described the 4th resistance and the inverting input of described the second amplifier respectively, the in-phase input end ground connection of described the second amplifier, the second end of described the 5th electric capacity respectively with the second end of described the 4th resistance, the first end of described the 5th resistance, the first end of described the 6th resistance, the first end of described the 7th electric capacity is connected with the output of described the second amplifier, the second end ground connection of described the 7th electric capacity, the second end of described the 5th resistance respectively with the first end of described the 8th electric capacity, the first end of described the 7th resistance is connected with the output of described the 3rd amplifier, the inverting input of described the 3rd amplifier is connected with the second end of described the 6th resistance and the second end of described the 8th electric capacity respectively, the in-phase input end ground connection of described the 3rd amplifier, ground connection after the second end of described the 7th resistance is connected with the first end of described the 8th resistance and the first end of described the 9th resistance respectively, the second end of described the 8th resistance is connected with the first end of described the 9th electric capacity and the output of described the 4th amplifier respectively, the inverting input of described the 4th amplifier is connected with the second end of described the 9th electric capacity and the second end of described the 9th resistance respectively, the in-phase input end ground connection of described the 4th amplifier, the output of described the 4th amplifier is the signal output part of described filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320736286.0U CN203563027U (en) | 2013-11-19 | 2013-11-19 | Filter circuit for voice recognizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320736286.0U CN203563027U (en) | 2013-11-19 | 2013-11-19 | Filter circuit for voice recognizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203563027U true CN203563027U (en) | 2014-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320736286.0U Expired - Fee Related CN203563027U (en) | 2013-11-19 | 2013-11-19 | Filter circuit for voice recognizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203563027U (en) |
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2013
- 2013-11-19 CN CN201320736286.0U patent/CN203563027U/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: 20140423 Termination date: 20141119 |
|
| EXPY | Termination of patent right or utility model |