More information on TextToSpeechVoiceBanking background process

Hi

Was wondering what is this process ?

/System/Library/PrivateFrameworks/TextToSpeechVoiceBankingSupport.framework/Support/voicebankingd

1. What does it means by "bank" ?
2. From where it scan the voices ?
3. Does it scan local videos to preserve voices ?
4. Does the information goes out from my computer ?
5. Can I use what it digested so far to my own benefit ?
6. How can I disable it ?

Thanks