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I'm working with two Nao robots. Their speech recognition abilities have been working alright so far, but recently they just stopped working altogether.

I am using Choregraphe and I can enter words in the dialog box and the robot will respond as intended, but when I speak out words, the robot will either not even recognize words being spoken, or will just display: Human: <...> and that's it. I have tried using autonomous life on and off, creating a simple dialog that only has one line of functionality, like: "u:(_*) Hello.", and it doesn't do anything.

In autonomous life mode the robot's eyes go blue and Nao nods occasionally as if it would hear words, but I get no response and see nothing in the console.

The robot I have is Nao model 6 (the dark grey one and as far as I know the newest model).

However if I use a speech recognition box, Nao will understand the spoken words, just not in the dialog. Do you have any idea what's going on here?

karel
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Kapistus
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1 Answers1

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Hi i had a simmilar issue with Pepper. I also encountered recognition stopping to work. In my Choregraph log I had: 

[WARN ] Dialog.StrategyRemote.personalData :prepare:0 FreeSpeechToText is not available

So the support let me know that:

The problem you observed happened because Pepper got a timeout from the Nuance Remote server, she will consider that the server is unavailable and will not try to contact it again for one hour (during which Free Speech will not work). This could be because the server is indeed unavailable, or because of network issues.

Fortunately to workaround a bad network you can change those parameters, with ALSpeechRecognition.setParameter(parameter_name, parameter_value)

The parameters that will interest you are:

RemoteTimeout: How long Pepper waits for a response from the Nuance Remote server, in milliseconds. Default value: 10000.0 (ms) RemoteTryAgain: Number of minutes before trying to use Nuance Remote again after a timeout. Default value: 60.0 (minutes)

Note that you will need to reset those values again after each boot.

Maybe that can also help you with Nao.

Also I learned that the Remote ASR seems to have a limit of about 200-250 invocations per day.

TVK
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  • a strange problem, I even performed a factory reset, just in case. Just now it worked for a moment, now reverted back to interpreting everything as "...". I'll give it a go and see what happens. Thanks. – Kapistus Feb 28 '19 at 10:49