Speech Recognition

[sgyuri2003]

Posted on May 04, 2012 at 15:45

Hi All!!

Do you think

this

is possible

in the

Controller

speech recognition

or

speech

-driven applications

to prepare

?

[sgyuri2003]

Posted on May 09, 2012 at 07:54

Yes.

 

I

 

think the same thing

.

 

Thus

 

the

 

principle

 

tool

 

for this.

[frankmeyer9]

Posted on May 09, 2012 at 10:50

Generally, the idea of realizing speech recognition with a Cortex Mx sounds really interesting.

When optimizing for an architecture and abandoning a generality approach in your code, an astonishing performance is possible.

About 20 years ago, I have seen a Z80 based measurement system clocked with 2.5 MHz, doing a FFT based real-time audio analysis.

[sgyuri2003]

Posted on May 11, 2012 at 16:14

I also

tried

to solve

Z80

device

.

(Sin

/ cos

ROM

table

for

the FFT

)

There was

100%

.

I

already

had

high-speed

CPU

(

4MHz

) :)

I hope

this

will be

F4

MCU

with more

success

.

[frankmeyer9]

Posted on May 11, 2012 at 17:44

> There was

100%

.

I

already

had

high-speed

CPU

(

4MHz) :)

Not sure what you mean.

But that z80 was the 'original' design, 4 clock cycles per instruction. The sin/cos values were for sure tabulated. And, the FFT was obviously solely based on integer calculation.

This was an example of tricky design & implementation to the hardware.

A Cortex M4F is assumed give you the possibility to use FP numbers. With a FPU you don't gain anything with an integer FFT, but loose either precicision or you are burdened with higher complexity.

[a_rocchegiani]

Posted on May 11, 2012 at 21:13

Hi all,

I think the

integer

FFT

 on

the

cortex

M4

can

give

an incredible

performance

gains

.

On

the

cortex

m3,

with the ST dsp library

, the result are already

remarkable.

T

he

cortex m4 core have 

most powerful

DSP-like

instruction

implemented, so a integer FFT implementation can give surely better performance.

 

[brian239955]

Posted on February 08, 2015 at 02:13

Playing about with a simple 'USB voice keyboard' using an STM32F4 Discovery board and a USB cable:

https://www.youtube.com/watch?v=rNjDnielkM8&feature=youtu.be

[brian239955]

Posted on February 18, 2015 at 22:07

https://sites.google.com/site/stm32f4voicekeyboard/main

[atakan]

Posted on October 24, 2016 at 21:07

Hi,

I'v found that document on ST's webpage.

http://www.st.com/content/ccc/resource/sales_and_marketing/presentation/product_presentation/30/8f/78/6a/b9/a4/45/ab/stm32-stm8_embedded_software_solutions.pdf/files/stm32-stm8_embedded_software_solutions.pdf/jcr:content/translations/en.stm32-stm8_embedded_software_solutions.pdf

Please look at page 48. It says Sensory ''speech recognition'' library is available. Does anyone know where to get it?

[Tesla DeLorean]

Posted on October 24, 2016 at 22:01

Does anyone know where to get it?

With all such things, if it is not available for immediate download, contact your local ST Sales Office.