[Python] speech recognition help

Usually this is relegated to utility software -- Dragon Naturally
Speaking[1] is one of the most popular. They tend to do more
reliably (higher recognition rates) with fixed vocabularies for
issuing commands than in free-form dictation.

There's the open-source CMU Sphinx project[2] which may allow you
to more easily interact with it programatically via an API. On
my Debian box, it's just an apt-get away[3]. Note that this is
*different* from the python-sphinx documentation package just
mentioned in a nearby thread on c.l.p

There's documentation[4] on connecting Python + Sphinx2 that may
be of assistance.

-tkc



[1]
http://www.nuance.com/naturallyspeaking/

[2]
http://cmusphinx.org/

[3]
apt-cache search sphinx2

[4]
http://sphinx.subwiki.com/sphinx/index.php/Sphinx3_python_quickstart

if you are on windows,
I would suggest Dragon Natural Speaking or Windows SAPI 5.1 (free, but
difficult to find).
There's Python layer written on top of the above two,
called DragonFly,
which uses it's own semantics and can also control the programs itself.

cheers,
Stef

thanks for the reply..
now working on cmu sphinx project..
do u know which one
1. cmu sphinx
2. natural speaking
3. windows sapi

is best ( in accuray and speed ) for predefined vocabulary.. and worth for
learning as well.?

For a pre-defined vocabulary, they should all be pretty good. In
general (for non-predefined vocabularies), I've heard that NS
beats both Sphinx and SAPI in terms of recognition quality. I
haven't seen any comparisons between Sphinx and SAPI.

Other considerations may also come into play:

- do you expect all your users to have a copy of NS? Then you
might have to look into something other than NS if they won't.
Or perhaps NS has a developers' toolkit that allows for
redistribution when built into your app.

- do you expect all your users to run Windows (as I type this
from my Linux box...)? If not, then SAPI won't be available to
your Mac/Linux/BSD/BeOS/Amiga/whatever users.

- do you need TTS (text-to-speech) capabilities as well? SAPI
includes them. (there are other TTS libraries available such as
mbrola/festival that are available for this if needed)

- how easy is it to bind to Python? Sphinx has Python bindings
detailed on the website. I can't speak for NS or SAPI.

- how much time/money do you have to invest? Sphinx is
open-source and free. SAPI is free-ish for developers, but I
don't know if Microsoft incurs a licensing cost for distributed
apps or other redistribution restrictions. I can't speak for
NS-for-developers.

Just a few thoughts,

-tkc

both are covered by DragonFly
Stef

hi all..

I tried following tools by ur advice..

1. cmu sphinx:
tried and managed run the demo programs.. but the accuracy is
so bad. for that i tried for how to train the grammer. but for that i had no
guidance.. docs give me the headache.. after 2 weeks.. i concluded that it
will not be commercially useful for distributed application.

2. Naturally speaking:
downloads only provided for cost. so no try.

3. windows sapi:
windows provides redistributeable copies. also there are some
python bindings available for to connect this engine. training with each
user is easy in windows sapi ( for that i choosed this.) only limitation is
usage within windows.

so , concluded that using windows sapi..

am i correct?

if u know any best articles/links for using windows sapi from python..
kindly give me that..

^^^^^^^
Typo of the week...

-tkc