Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

sampling of human voice

Status
Not open for further replies.

thisistausif

Member level 2
Joined
Aug 3, 2005
Messages
49
Helped
3
Reputation
6
Reaction score
2
Trophy points
1,288
Location
india
Activity points
1,662
voice sampling rate

hello

what the correct sample rate for sampling of human voice properly by using ADC
what would be the affect if rate is less than required ?
 

csa1980

Newbie level 5
Joined
Feb 14, 2007
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,369
voice sample rate

the sampling rate i think must be within 300 - 3khz..

if the rate is going to be small then u will get a voice which is expanded...the duration of each sample will increase
 

Circuit_seller

Full Member level 5
Joined
Sep 23, 2002
Messages
302
Helped
17
Reputation
34
Reaction score
7
Trophy points
1,298
Activity points
2,350
sample rate for voice

Hi

The minimum reasonable sampling frequency of human speech is 8kHz. By the way after sampling you can use VOCODER to decrease this rate.
 

naresh850

Full Member level 3
Joined
Jun 9, 2006
Messages
157
Helped
6
Reputation
12
Reaction score
4
Trophy points
1,298
Activity points
2,249
voice sampling frequency

standard is 8000 samoles/secound
coz human voice freq range is 3.3khz.
 

wowhaha

Banned
Joined
Jun 5, 2007
Messages
0
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,280
Activity points
0
sampling rate voice

To avoid any problems of aliasing, best sampling rate will be 10KHz.
 

mondunno

Advanced Member level 4
Joined
Jan 11, 2007
Messages
119
Helped
15
Reputation
30
Reaction score
4
Trophy points
1,298
Activity points
1,907
human voice sampling

hello

the articulation bandwidth of voice is (300Hz to 3Kz), which makes 8KHz minimum sampling rate(this is for making out words clearly, lesser would work but its not optimum)


less sampling rate makes voice more noisy, to hear... (effect is known as aliasing in general)
 

rakesh_vnit

Member level 3
Joined
Sep 4, 2007
Messages
54
Helped
4
Reputation
8
Reaction score
1
Trophy points
1,288
Location
india
Activity points
1,714
voice sampling

hey....

the minimum samplin rate of any human voice that gives u a clear data will be somethin around 8k samples/sec. but this actually depends on the application.... its obvious that more the data the better u get the info out of it. like when u want to go for some recognisin and reproducin system u need a much higher , 'coz u need a bit more info to get the output reproduced. on the other hand just for a recognition system u can do it wid 8k sample/sec, which would reduce the aliasing....n obviously satisfies the nyquist criteria....
 

thisistausif

Member level 2
Joined
Aug 3, 2005
Messages
49
Helped
3
Reputation
6
Reaction score
2
Trophy points
1,288
Location
india
Activity points
1,662
minimum sampling rate for voice

hey rakes_vnit

for reproduction at some reciever we need some extra means 10kHz would be enough or more required??
 

rakesh_vnit

Member level 3
Joined
Sep 4, 2007
Messages
54
Helped
4
Reputation
8
Reaction score
1
Trophy points
1,288
Location
india
Activity points
1,714
phone voice sample rate

hey....

as i told u earlier reproduction needs more information n hence greater sampling rate.
i think u r takin the lpc(linear predictive coeff) or cepstral coeff. to represent the signal when u r trainin the system n later on from these u would reproduce them. i such a case the more samples that u take the more info u have as coeff. which u can reproduce.

i precisely cant say which freq would be good for u ...it depends on the quality u want ... so my advice is start with some higher freq say 15k Hz and go down 10...until u think u r satisfied with lowest freq possible.

regards,
rakesh
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top