CN101364332A - Method implementing audio encoding by CPLD - Google Patents
Method implementing audio encoding by CPLD Download PDFInfo
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- CN101364332A CN101364332A CNA2008101400063A CN200810140006A CN101364332A CN 101364332 A CN101364332 A CN 101364332A CN A2008101400063 A CNA2008101400063 A CN A2008101400063A CN 200810140006 A CN200810140006 A CN 200810140006A CN 101364332 A CN101364332 A CN 101364332A
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- cpld
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- audio file
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 241001672694 Citrus reticulata Species 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 108091026890 Coding region Proteins 0.000 abstract 1
- 238000012790 confirmation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention provides a method for implementing the speech coding by using a CPLD, which comprises the following steps: based on the I2S audio protocol, a master processor provides a 2.048MHz clock signal for the CPLD which can complete the coding operation of an audio file by means of the hardware logic function of the CPLD; according to the coding sequence, the clock signal is delivered to an A/D conversion chip to be converted into an analog signal, and then the analog signal is amplified by an operational amplifier and delivered to a loudspeaker for giving a sound; the audio file is recorded by the 'recorder' program of the Windows operating system, and the data format is of 8.000kHz, 8 bits, mono channel and 7kb/second. The main operations are all subjected to the CPLD hardware logical operation, which can greatly reduce the operating burden of the master processor during the audio playing process. Additionally, the CPLD hardware logical operation speed is faster than the program running speed, so that the program running efficiency is improved. The method achieves the effect of reporting the amount in the human voice with the standard Mandarin pronunciation, facilitates the price confirmation of the Merchant and the customer, and avoids the disputes.
Description
Technical field
The present invention relates to a kind of tax-control cash register scrap build technology, specifically a kind of method of utilizing CPLD to realize voice coding.
Background technology
Present high-grade tax-control cash register design is all developing to hommization, practicability direction, makes the aim that the client obtains better, service is the tax-control cash register design more easily.In the gathering process, trade company if can quote the amount of money with standard mandarin with true man's voice, can make things convenient for trade company and client's price to confirm when the input amount of money, avoids producing dispute to a certain extent.The cashing machine of prior art does not also possess above-mentioned functions at present.
Summary of the invention
The purpose of this invention is to provide the method that a kind of CPLD of utilization realizes voice coding.This method is according to I2S audio protocols standard, the clock signal of accurate 2.048MHz is provided by SOC, utilize CPLD can realize the encoding operation of audio file, order according to coding is delivered to successively and is converted simulating signal in the modulus conversion chip to, amplify through operational amplifier again, can pronounce by loudspeaker.Audio file can be recorded with " sound-track engraving apparatus " program that windows operating system carries, and requirement is that data layout is 8.000kHz, 8, monophony, 7kb/ second.
The invention has the beneficial effects as follows, main operation all is by the computing of CPLD hardware logic, can alleviate the computational burden of primary processor when voice playing is handled greatly, simultaneously because of CPLD hardware logic arithmetic speed far above program operation speed, therefore can improve program run efficient.Can quote the amount of money with standard mandarin with true man's voice, make things convenient for trade company and client's price to confirm, avoid producing dispute.
Description of drawings
Accompanying drawing 1 is to utilize CPLD to realize the circuit theory synoptic diagram of voice coding;
Accompanying drawing 2 is to utilize CPLD to realize the voice coding process flow diagram.
Embodiment
With reference to Figure of description to explaining below the work of the present invention.
The method of utilizing CPLD to realize voice coding of the present invention, be according to I2S audio protocols standard, the clock signal of accurate 2.048MHz is provided by SOC, realize the encoding operation of audio file by CPLD, order according to coding is delivered to successively and is converted simulating signal in the modulus conversion chip to, amplify through operational amplifier again, sound by loudspeaker, audio file can be recorded with " sound-track engraving apparatus " program that windows operating system carries, data layout is 8.000kHz, 8, monophony, 7kb/ second.
Embodiment
CPLD audio coding flow process is introduced: I2S has 3 main signals: 1. serial clock SCLK, also be bit clock (BCLK), i.e. and each data of corresponding DAB, SCLK has 1 pulse.The frequency of SCLK=2 * sample frequency * sampling resolution 2. frame clock LRCK is used for the data of switching right and left sound channel.What transmitting is the data of L channel to LRCK for " 1 " expression, and what then represent to transmit for " 0 " is the data of R channel.The frequency of LRCK equals sample frequency.3. serial data SDATA, the voice data of representing with two's complement exactly.Can be synchronous better between system in order to make, also need to transmit a signal MCLK in addition, be called major clock, be 256 times or 384 times of sample frequency.
This method is applicable to any simple phonetic function of increase that needs, and does not have condition to increase the equipment of dedicated voice chip again.On probation at tide RE-370FB tax-control cash register, obtain good effect.
The present invention is compared with existing technology, and in the gathering process, trade company can use true man's voice when the input amount of money Quote the amount of money with standard mandarin, make things convenient for trade company and client's price to confirm, can for the client provides convenience can also Avoid to a certain extent producing dispute, thereby have good value for applications.
Claims (1)
1. method of utilizing CPLD to realize voice coding, it is characterized in that according to I2S audio protocols standard, primary processor provides the clock signal of a 2.048MHz to CPLD, realize the encoding operation of audio file by the hardware logic function of CPLD, order according to coding is delivered to successively and is converted simulating signal in the modulus conversion chip to, amplify through operational amplifier again, sound by loudspeaker, audio file is recorded with " sound-track engraving apparatus " program that windows operating system carries, data layout is 8.000kHz, 8, monophony, 7kb/ second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101400063A CN101364332A (en) | 2008-09-12 | 2008-09-12 | Method implementing audio encoding by CPLD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101400063A CN101364332A (en) | 2008-09-12 | 2008-09-12 | Method implementing audio encoding by CPLD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101364332A true CN101364332A (en) | 2009-02-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101400063A Pending CN101364332A (en) | 2008-09-12 | 2008-09-12 | Method implementing audio encoding by CPLD |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101364332A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911987A (en) * | 2017-02-21 | 2017-06-30 | 珠海全志科技股份有限公司 | Main control end, equipment end, the method and system of transmission multichannel audb data |
-
2008
- 2008-09-12 CN CNA2008101400063A patent/CN101364332A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911987A (en) * | 2017-02-21 | 2017-06-30 | 珠海全志科技股份有限公司 | Main control end, equipment end, the method and system of transmission multichannel audb data |
| CN106911987B (en) * | 2017-02-21 | 2019-11-05 | 珠海全志科技股份有限公司 | Main control end, equipment end, the method and system for transmitting multichannel audb data |
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Open date: 20090211 |