You wouldn't actually do the speech recognition in Flash, but rather have Flash record to a file, have the server process it (using an already developed program of course, as as Steven explains speech to text is not just a simple matter).
So essentially the flow would be: Flash Player would record the sound, tell server to save file to x location, open a socket connection to server, tell the server to process the sound file. Then, through the socket connection you would send data back to Flash as you process the file. This is a real simple overview, but essentially if you in fact can record sound through the microphone with Flash Player and you do have an already built speech to text program installed and working (with an API that you could plug into), then it is feasible and it's not as complicated as writing your own speech to text recognition software in ActionScript. I have implemented a similar solution for creating video files with Flash (i.e. you drag 5-10 second clips onto a timeline, send the data back to the server, the server reads the sequence, puts the clips together into a file and exports as a new video file), so this is a workable and good solution, as well as your best bet. - Taka On Wed, Aug 26, 2009 at 10:41 PM, Steven Sacks <flash...@stevensacks.net>wrote: > This is how you record sound: > http://www.getmicrophone.com/?p=69 > > If you're asking how to convert sound waves into speech, dude, what? Do > you realize how challenging speech recognition is? Wait, why am I asking > you this? If you did, you wouldn't be asking people on a Flash list how to > do it, as if it's some piece of code somebody can copy and paste or a few > links that will tell you the secret formula. > > Most speech to text programs are based on the Hidden Markov models. In > speech recognition, the hidden Markov model would output a sequence of > n-dimensional real-valued vectors (with n being a small integer, such as > 10), outputting one of these every 10 milliseconds. The vectors would > consist of cepstral coefficients, which are obtained by taking a Fourier > transform of a short time window of speech and decorrelating the spectrum > using a cosine transform, then taking the first (most significant) > coefficients. The hidden Markov model will tend to have in each state a > statistical distribution that is a mixture of diagonal covariance Gaussians > which will give a likelihood for each observed vector. Each word, or (for > more general speech recognition systems), each phoneme, will have a > different output distribution; a hidden Markov model for a sequence of words > or phonemes is made by concatenating the individual trained hidden Markov > models for the separate words and phonemes. > > There you have it. That's a high level overview of speech to text. Do you > understand anything in that paragraph? Probably not. > > Unless you're willing to study and put in the time to figure out how to do > this, you're not going to figure it out. Nobody is going to point you in > the right direction because this is a very niche knowledge area and none of > these people are on Flashcoders. They're at universities working on their > doctorates or working for the military or government, or some private > company and they're not sharing this information. This is the stuff patents > are made of. > > So either give up now (because what you want is some easy solution and > there isn't one) or start doing real research, learn some serious Calculus, > become an expert on on sound, speech, waveforms, and then figure out how to > port all of this into Flash, which, in all likelihood, lacks the performance > to actually achieve this. > > You'll probably have to do it on the server, passing the sound to the > server as an mp3 file, and then pass the text back. That's the only thing I > can think of that would possibly be able to do this. > > Prove me wrong. If you pull this off, you could probably build an entire > company around your technology. > > _______________________________________________ > Flashcoders mailing list > Flashcoders@chattyfig.figleaf.com > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > _______________________________________________ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
