Android: Speech Recognition without using google server

Question

I want to develop an Speech recognizer in android, which should work in offline. As the android's built-in speech recognizer uses google server which needs internet, i want an alternative which works in the absence of internet.

Please suggest me some way to achieve the above feature.

Chloromycetin

Please use SO as per the regulations. This is a very clean place, please help to keep it that way. – Nunatak

Has Google made this easy using SpeechRecognizer? androidpolice.com/2013/02/15/… – Permission

#35389220 – Hysterectomy

Answer 1

We used to recommend pocketsphinx, but now more advanced technology based on Kaldi toolkit is available.

The demo is here: Vosk API, you can simply load it in Android Studio and run. Full disclosure: I am the primary author of Vosk.

It supports speech recognition in 7 major languages - English, Chinese, Spanish, Portuguese, German, French and Russian.

Oarlock

@Swathi EP did you have any success? – Pericope

Yes, he did. See this thread sourceforge.net/projects/cmusphinx/forums/forum/5471/topic/… – Oarlock

Hi Tom, You want to know the steps to run android pocketsphinx demo project refer: swathiep.blogspot.com/2011/02/… – Chloromycetin

Why it is closed as not a real question by Kev♦ ?? This is not only a real question, it's a research problem. – Scalene

Answer 2

If the speech recognizer has limited vocabulary (as in a simple voice user interface) and is limited few samples - it maybe possible. Applications such as Transcription is not a likely task to be performed on Android (in offline mode). Also DSP is required for Voice Recognition ... A limited vocabulary and limited to very few samples might be your best bet.

Tyrant

yes, i need only limited vocabulary. My requirement is to have voice commands to trigger applications. – Chloromycetin

I'd recommend seeing if you can figure out (academic papers maybe?) how "dumbphones" do that. – Berserk

Answer 3

If you really want to invest time and manpower for your goal, look at the Java-Project Java Speech API 2.0 (JSR 113).

It is used on "normal" mobile phones for voice commands and works offline. Unfortunately, the project is discontinued.

Courlan

Answer 4

You can download Google voices for later use. From you mobile -> Setting -> “Language and Input” -> "Voice Search" -> "Download offline speech recognition" -> Choose the language pack .

Or you can use other programs, such as Dragon Mobile Assistant https://play.google.com/store/apps/details?id=com.nuance.balerion&hl=en

Valonia

Seems to be incompatible with nexus 5? What about nuancemobilelife.com/apps ? – Fraley

And there is no "Download offline speech recognition" on my kit kat – Fraley

There is no "Download offline speech recognition" on my Jelly Bean (4.1.2) either. Nexus S. Looks like a whimsical feature. – Perk

kizeo.com/… But you can find it in slightly different places depending on your exact version. It's available even on MIUI V5 – Valonia

@Valonia Thank you. I did arrive at the same exact screen shown in the link you provided but instead of the 3 options ("Choose input languages", "Block offensive words" and "Offline speech recognition"), I only have 2 options on my phone (No "Offline speech recognition"). Weird. – Perk

Maybe depends on your firmware. I'm sorry I can't help you more. Perhaps you can download it in some other way. – Valonia

Only one android version, which I don't remember, was blessed with this feature. – Tunnell

Answer 5

You're not going to be happy with this workaround but here goes: Record the speech & store it for later. When an internet connection is available, connect to the internet, playback the recorded speech and convert it to text.

Hey, it's the easiest way I can think of and might work for some applications, like dictation and memos.

Pyrimidine

So "offline" means "connect to the internet later"?!?!? – Joli