CN206193757U - AAC digital audio frequency decoding handles integrated circuit board - Google Patents
AAC digital audio frequency decoding handles integrated circuit board Download PDFInfo
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- CN206193757U CN206193757U CN201621094079.XU CN201621094079U CN206193757U CN 206193757 U CN206193757 U CN 206193757U CN 201621094079 U CN201621094079 U CN 201621094079U CN 206193757 U CN206193757 U CN 206193757U
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- aac
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Abstract
The utility model provides a AAC digital audio frequency decoding handles integrated circuit board for solve the easy impaired problem of current decoding circuit tone quality, include: digital audio frequency receiver, AAC decode treater, MCU treater, mould / number signal converter, number / mould signal converter, decode output termination number / the mould signal converter of treater of digital audio frequency receiver's input termination MCU treater, the output termination AAC treater of decoding, mould / number signal converter's the output termination AAC treater of decoding, AAC, number / mould signal converter's the input termination AAC treater of decoding, the output termination AAC of the MCU treater of decoding. The utility model has the advantages of simple structure makes incoming signal low distortion, low noise, the interference killing feature is strong and highly decodes reduction input AAC data signal.
Description
Technical field
The utility model is related to signal to distribute or switch technology field, at a kind of AAC digital audio decodings
Reason board.
Background technology
AAC audio coding formats, complete name is called " Advanced Audio Coding（Advanced Audio Codec）”.It is this
First and then senior coding criterion, is by Fraunhofer IIS companies（The maker of preceding MP3 standards）, Dolby, AT＆T, rope
Industry giant's joint development such as Buddhist nun, apple.Used as a kind of audio compression algorithm of high compression ratio, AAC compression ratios are usually 18：
1, also there is number to be said to be 20：1, mp3；In terms of tonequality, due to using multichannel, and using the describing mode of low-complexity, make
It is more even better in the case of same specification than almost all of traditional code mode.AAC can support up to 48 tracks, 15
Individual low frequency（LFE）Track, the support of 5.1 multichannels, sample rate higher（96kHz is reached as high as, audio CD is 44.1kHz）More
Sampling precision high（8bit, 16bit, 24bit, 32bit are supported, CD is 16bit）And have the compatibility of multilingual, more
Decoding efficiency high, in general, AAC can provide more preferable tonequality on the premise of contrast mp3 file reduces 30%.
The domestic main AAC functional products in market are the built-in AAC decodings of music software player at present, and such product is general
Stereophonic signal can only be exported, and built-in AAC decoding circuits can be only done the reduction of low bit- rate, using on application scenario
There is the loss of considerable restraint and tonequality.
Utility model content
The utility model proposes a kind of reasonable in design, simple structure, make input signal low distortion, low noise, anti-interference energy
The AAC digital audio decodings treatment board of the strong simultaneously height decoded back input AAC data signals of power.
What the technical solution of the utility model was realized in：AAC digital audio decodings process board, including DAB
Receiver, AAC decoding processors, MCU processors, analog signal adapter, digital-to-analog signal converter；Digital audio receiver
Input termination MCU processors, output termination AAC decoding processors, for receiving coaxial/optical fiber and digital SPDIF signals；Mould/
The output termination AAC decoding processors of number signal adapter, for receiving simulating stereo voice signal, and convert the signal into
Data signal is input into AAC decoding processors；The output termination digital-to-analog signal converter of AAC decoding processors, for numeral
Signal carries out audio decoder treatment, exports 6 channel digital audio signals；At the input termination AAC decodings of digital-to-analog signal converter
Reason device, for 6 channel digital audio signals that AAC decoding processors are exported being converted into 6 channel analog audio signals and being exported；
The output termination AAC decoding processors of MCU processors, for controlling AAC decoding processors audio decoder to process.
As a kind of perferred technical scheme, the model CS4953xx of described AAC decoding processors.
As a kind of perferred technical scheme, the model STM32F103 of described MCU processors.
Above-mentioned technical proposal is employed, the beneficial effects of the utility model are：
Signal handled by the utility model is data signal；Original input signal can be highly gone back, makes transmission signal low
Distortion, low noise, strong antijamming capability, and audio signal is processed, beautify sense of hearing effect function, people are met significantly
In the tonequality requirement of different places；Structure of the present utility model and interface facilitate each audio product manufacturer to apply, and make audio
Production producer is easier to possess sound effect function selection, facilitates the manufacturer to carry out production cost control；This practicality is new
Type possesses digital and analog signaling input, conveniently connects the digit broadcasting system digital audio and video signals of national development.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for 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, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the electronic line structure schematic diagram of the utility model digital audio receiver.
Fig. 3 is the electronic line structure schematic diagram of the utility model MCU processors.
Fig. 4 is the electronic line structure schematic diagram of the utility model analog signal adapter.
Fig. 5 is the electronic line structure schematic diagram of the utility model AAC decoding processors.
Fig. 6 is the electronic line structure schematic diagram of the utility model digital-to-analog signal converter.
Specific 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 for being obtained, belongs to the scope of the utility model protection.
In Fig. 1~6, the AAC digital audio decodings treatment board of the present embodiment, including digital audio receiver, AAC solution
Code processor, MCU processors, analog signal adapter, digital-to-analog signal converter；The input termination of digital audio receiver
MCU processors, output termination AAC decoding processors, for receiving coaxial/optical fiber and digital SPDIF signals；Analog signal is changed
The output termination AAC decoding processors of device, for receiving simulating stereo voice signal, and it is defeated to convert the signal into data signal
Enter AAC decoding processors；The output termination digital-to-analog signal converter of AAC decoding processors, for carrying out audio to data signal
Decoding process, exports 6 channel digital audio signals；The input termination AAC decoding processors of digital-to-analog signal converter, for inciting somebody to action
6 channel digital audio signals of AAC decoding processors output are converted into 6 channel analog audio signals and export；MCU processors
Output termination AAC decoding processors, for controlling AAC decoding processors audio decoder to process.
In the present embodiment, the model CS4953xx of described AAC decoding processors.
In the present embodiment, the model STM32F103 of described MCU processors.
The utility model can highly reduce input AAC data signals, make transmission signal low distortion, low noise, anti-interference
Ability is strong, and audio signal is processed, and beautifies sense of hearing effect function, and people are met significantly will in the tonequality of different places
Ask；Structure of the present utility model and interface facilitate each audio product manufacturer to apply, and are easier audio product manufacturer
Possess sound effect function selection, facilitate the manufacturer to carry out production cost control；The utility model possesses numeral and simulation is believed
Number input, conveniently connect the digit broadcasting system digital audio and video signals of national development.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (3)
1.AAC digital audio decodings process board, it is characterised in that including：Digital audio receiver, AAC decoding processors,
MCU processors, analog signal adapter, digital-to-analog signal converter；
The input termination MCU processors of described digital audio receiver, output termination AAC decoding processors, it is same for receiving
Axle/optical fiber and digital SPDIF signals；
The output termination AAC decoding processors of described analog signal adapter, for receiving simulating stereo voice signal, and
Convert the signal into data signal input AAC decoding processors；
The output termination digital-to-analog signal converter of described AAC decoding processors, for being carried out at audio decoder to data signal
Reason, exports 6 channel digital audio signals；
The input termination AAC decoding processors of described digital-to-analog signal converter, for AAC decoding processors to be exported 6 lead to
Road digital audio and video signals are converted into 6 channel analog audio signals and export；
The output termination AAC decoding processors of described MCU processors, for controlling AAC decoding processors audio decoder to process.
2. AAC digital audio decodings according to claim 1 process board, it is characterised in that described AAC decoding process
The model CS4953xx of device.
3. AAC digital audio decodings according to claim 1 process board, it is characterised in that described MCU processors
Model STM32F103.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621094079.XU CN206193757U (en) | 2016-09-30 | 2016-09-30 | AAC digital audio frequency decoding handles integrated circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621094079.XU CN206193757U (en) | 2016-09-30 | 2016-09-30 | AAC digital audio frequency decoding handles integrated circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206193757U true CN206193757U (en) | 2017-05-24 |
Family
ID=58730040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621094079.XU Expired - Fee Related CN206193757U (en) | 2016-09-30 | 2016-09-30 | AAC digital audio frequency decoding handles integrated circuit board |
Country Status (1)
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| CN (1) | CN206193757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111131816A (en) * | 2020-02-18 | 2020-05-08 | 深圳市金锐显数码科技有限公司 | Television board card digital audio signal detection device |
-
2016
- 2016-09-30 CN CN201621094079.XU patent/CN206193757U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111131816A (en) * | 2020-02-18 | 2020-05-08 | 深圳市金锐显数码科技有限公司 | Television board card digital audio signal detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20170524 Termination date: 20170930 |