ADC Analog -to- Digital Conversion How it works??? Mariia Kreposna
Analog-to-Digital Conversion
May 07, 2015
Description of the analog to digital convercion process (ADC).
It is becoming more and more widespread to imply progressive technologies into different aspect of both daily and business life. One of the most desired technology that is being implicated into numerous industries is speech–recognition software. In reality, it looks like an operator speaks to his computer/machine/device and sets commands which are performed subsequently. Special voice-recognition software ADC (Analog-to-digital converter) lies in the heart of this process. Its main role is to transform human speech to “computer” speech which set commands. To understand the principle of voice command working, we concentrate on the technology of ADC.
It is becoming more and more widespread to imply progressive technologies into different aspect of both daily and business life. One of the most desired technology that is being implicated into numerous industries is speech–recognition software. In reality, it looks like an operator speaks to his computer/machine/device and sets commands which are performed subsequently. Special voice-recognition software ADC (Analog-to-digital converter) lies in the heart of this process. Its main role is to transform human speech to “computer” speech which set commands. To understand the principle of voice command working, we concentrate on the technology of ADC.
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Transcript
ADC Analog
-to-Digital
Conversion
How it works???
Mariia Kreposna
process
Recording voice
Sampling analog voice
Filtering the record
Encoding the samples
Matching segments to phonemes
1
2
3
4
6
Determination of the words
5
the
1 The software records human speech
Filtering
System filters unwanted noise by adjusting the recorded voice to a constant volume level
2
Sampling Analog Voice3
1010__________________________________________1001__________________________________________1000__________________________________________0111_________________________________________0110__________________________________________0101 __________________________________________0100 __________________________________________0011 __________________________________________
Sound waveMeasurementof amplitude
Sample is a single measurement of amplitude.
Minimum sampling rate should be at least twice the highest data frequency of the analog signal.
The larger sampling rate, the better accuracy of conversion
Encoding samples
Each sample is assigned a number according to its amplitude.
0111
1000
1001
0110
1001
0101
4
Matching segments
to phonemes
5100010010110100101010111
uhstffarphor
10001001011010010101
uhstffarph
Findingwords
startt
streamartistteam
6 START
Thank you
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