CN206541153U - A kind of low delay chauvent's criterion device - Google Patents
A kind of low delay chauvent's criterion device Download PDFInfo
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- CN206541153U CN206541153U CN201720082607.8U CN201720082607U CN206541153U CN 206541153 U CN206541153 U CN 206541153U CN 201720082607 U CN201720082607 U CN 201720082607U CN 206541153 U CN206541153 U CN 206541153U
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- chauvent
- low delay
- pitched sounds
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Abstract
The utility model is related to a kind of low delay chauvent's criterion device, including analog-digital converter and digital analog converter, the low delay chauvent's criterion device also includes the parallel chip of binary channels, its input connects analog-digital converter, its output end is connected in digital analog converter, the parallel channel of the parallel piece of binary channels, and first passage carries out time domain trap processing, second channel carries out frequency detection of uttering long and high-pitched sounds, and second channel is exported to first passage.Implement the utility model embodiment, have the advantages that：The low delay chauvent's criterion device that the utility model is provided carries out the parallel processing that frequency is detected and time domain trap is handled of uttering long and high-pitched sounds by fpga chip, can significantly it save the time, frequency detection part of uttering long and high-pitched sounds can be regarded as not elapsed time, it is ensured that the low delay of system, real-time.
Description
Technical field
The utility model is related to a kind of chauvent's criterion equipment, more particularly to a kind of low delay chauvent's criterion device.
Background technology
In sound reinforcement system, because microphone is used in same sound field with loudspeaker simultaneously, the sound of loudspeaker passes through week
The reflection for enclosing interface is sent out by microphone reception after power amplifier amplifies, and through loudspeaker, so as to form a sound
Learn loop.When the transmission function of the loop is when the gain of some frequency is more than 1 and phase is 2 π integral multiple, sound reinforcement system will
Becoming unstable causes generation of uttering long and high-pitched sounds.
The Crack cause uttered long and high-pitched sounds according to sound reinforcement system, general chauvent's criterion method mainly have improvement room acoustics environment,
Series equalizer or frequency shifter etc. in sound reinforcement system, in addition, also having some data signal chauvent's criterion processing methods, such as：
Adaptive echo cancellation method, spatial filtering method, wave trap method etc..
Traditional chauvent's criterion method：Improve room acoustics environment, series equalizer or frequency shifter in sound reinforcement system
Deng although these method system delay are smaller, the raising for damaging big and sound transmission gain to the tonequality of system is less.
In recent years, developing rapidly with Digital Signal Processing, occurs in that some new chauvent's criterion methods, such as again
Adaptive echo cancellation method, spatial filtering method, wave trap method etc..Above-mentioned method always of uttering long and high-pitched sounds is required for using single channel chip,
Utter long and high-pitched sounds frequency detection and the processing of time domain trap of carry out order in chip, although therefore these algorithms to the damage of tonequality compared with
It is small, but its shortcoming is exactly that algorithm complex is higher, and the system delay that complicated calculations are brought is higher, so as to cause the reality of sound reinforcement system
When property is poor.
Utility model content
The utility model embodiment technical problem to be solved is, multiple for algorithm in current chauvent's criterion device
Miscellaneous degree is higher, and the system delay that complicated calculations are brought is higher, so as to cause the problem of real-time of sound reinforcement system is poor, it is proposed that
A kind of low delay chauvent's criterion device.
In order to solve the above-mentioned technical problem, the utility model embodiment provides a kind of low delay chauvent's criterion device, bag
Analog-digital converter and digital analog converter are included, the low delay chauvent's criterion device also includes the parallel chip of binary channels,
Its input connects analog-digital converter, its output end connection digital analog converter, the parallel channel of the parallel piece of binary channels
In, first passage carries out time domain trap processing, and second channel carries out frequency detection of uttering long and high-pitched sounds, and second channel is exported to first and led to
Road.
Wherein, detection of uttering long and high-pitched sounds, frequency of uttering long and high-pitched sounds are divided into second channel to position and three parts of trapper coefficient calculating, and according to
Sequential series are set like this.
Wherein, the parallel chip of binary channels is fpga chip.
Wherein, the output end connection digital analog converter of first passage.
Implement the utility model embodiment, have the advantages that：The low delay chauvent's criterion that the utility model is provided
Device carries out the parallel processing that frequency is detected and time domain trap is handled of uttering long and high-pitched sounds by fpga chip, when can significantly save
Between, frequency detection part of uttering long and high-pitched sounds can be regarded as not elapsed time, it is ensured that the low delay of system, real-time.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the low delay chauvent's criterion device in the embodiment of the utility model one.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Refer to Fig. 1, Fig. 1 is the structural representation of the low delay chauvent's criterion device in the embodiment of the utility model one.
The low delay chauvent's criterion device includes analog-digital converter 11, the parallel chip 12 of binary channels and digital analog converter
13。
The input connection analog-digital converter 11 of the parallel chip of binary channels, its output end connection digital analog converter
13, in the parallel channel of the parallel piece of binary channels, first passage 121 carries out time domain trap processing, and second channel 122 carries out frequency of uttering long and high-pitched sounds
Point is detected, and second channel 122 is exported to first passage 121.The output end connection digital analog converter of first passage 121
13.It is divided into detection of uttering long and high-pitched sounds, frequency of uttering long and high-pitched sounds positioning and trapper coefficient in second channel 122 and calculates three parts, and it is suitable according to this
Sequence is arranged in series.Wherein, the parallel chip of binary channels is preferably fpga chip 12.
First, simulated audio signal is converted to after digital audio and video signals by analog-digital converter 11, inputs FPGA cores
Piece 12, in fpga chip 12, digital audio and video signals are separately input to first passage 121 with being carried out parallel in second channel 122
Processing.Carry out carrying out frequency detection of uttering long and high-pitched sounds in time domain trap processing, second channel 122 in first passage 121.And by time domain trap
Digital audio and video signals after processing module processing are the output digital audio and video signals handled by chauvent's criterion.
Frequency of uttering long and high-pitched sounds detection calculates sufficiently complex, is divided into detection of uttering long and high-pitched sounds, frequency of uttering long and high-pitched sounds positioning and trapper coefficient and calculates
Three parts.When frequency detection of uttering long and high-pitched sounds is without new trapper coefficient output, the processing of time domain trap is carried out by former trapper coefficient
Processing.Therefore, complicated frequency detection of uttering long and high-pitched sounds calculates total delay that brought delay does not interfere with system, can only influence to making a whistling sound
It is the suppression speed of frequency.And the processing of time domain trap is only calculated comprising simply multiply-add, calculating speed is fast, and computation delay is very
It is low.Therefore, basic handled by time domain trap of the delay of whole system determines, without the delay by frequency detection of uttering long and high-pitched sounds.
It is defeated that the digital audio and video signals of last FPGA outputs are reconverted into simulated audio signal by digital analog converter 13
Go out.
Implement the utility model embodiment, have the advantages that：The low delay chauvent's criterion that the utility model is provided
Device carries out the parallel processing that frequency is detected and time domain trap is handled of uttering long and high-pitched sounds by fpga chip, when can significantly save
Between, frequency detection part of uttering long and high-pitched sounds can be regarded as not elapsed time, it is ensured that the low delay of system, real-time.
Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (4)
1. a kind of low delay chauvent's criterion device, including analog-digital converter and digital analog converter, it is characterised in that
The low delay chauvent's criterion device also includes the parallel chip of binary channels, and its input connects the analog-digital converter, its
Output end is connected in the digital analog converter, the parallel channel of the parallel piece of binary channels, and first passage carries out time domain and fallen into
Ripple processing, second channel carries out frequency detection of uttering long and high-pitched sounds, and the second channel is exported to the first passage.
2. low delay chauvent's criterion device as claimed in claim 1, it is characterised in that be divided into inspection of uttering long and high-pitched sounds in the second channel
Survey, frequency of uttering long and high-pitched sounds positioning and trapper coefficient calculate three parts, and set according to this sequential series.
3. low delay chauvent's criterion device as claimed in claim 2, it is characterised in that the parallel chip of binary channels is FPGA
Chip.
4. low delay chauvent's criterion device as claimed in claim 1, it is characterised in that the output end connection of the first passage
The digital analog converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720082607.8U CN206541153U (en) | 2017-01-20 | 2017-01-20 | A kind of low delay chauvent's criterion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720082607.8U CN206541153U (en) | 2017-01-20 | 2017-01-20 | A kind of low delay chauvent's criterion device |
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| CN206541153U true CN206541153U (en) | 2017-10-03 |
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| CN201720082607.8U Expired - Fee Related CN206541153U (en) | 2017-01-20 | 2017-01-20 | A kind of low delay chauvent's criterion device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637552A (en) * | 2018-11-29 | 2019-04-16 | 河北远东通信系统工程有限公司 | A kind of method of speech processing for inhibiting audio frequency apparatus to utter long and high-pitched sounds |
-
2017
- 2017-01-20 CN CN201720082607.8U patent/CN206541153U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637552A (en) * | 2018-11-29 | 2019-04-16 | 河北远东通信系统工程有限公司 | A kind of method of speech processing for inhibiting audio frequency apparatus to utter long and high-pitched sounds |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171003 Termination date: 20210120 |