Background noises

Voice and Speech recognition products are best used in quiet environments. Although the software can be trained to ignore most background noise, an unexpected noise such as telephone ring, others talking or laughing can end up in the computer attempting to recognize the extraneous sounds as if you were dictating text.

If you are using the Voice and Speech Recognition software mainly for command and control of your computer instead of dictation, then you should make sure that all of the commands you create for the system have two or more syllables. This helps because one-syllable words are frequently mis-recognized when there are sudden changes in background noises. For example, a sneeze may be mistakenly heard by the computer as a command to: "Mute" or "New". A multiple syllable command such as: "Mute Volume" is not easily mis-heard.

Audio-Visual Speech Recognition

Teaching Computers to Read Lips (
Software allows developers to build computers capable not only of voice recognition, but that can also 'see' and 'read lips' the way people do.

Although today's powerful speech recognition algorithms tend to work well when background noise is eliminated or a well-tuned headset is used, their accuracy rapidly degrades when applications have to cope with noisy environments.

Combined with speech recognition algorithms from Intel's OpenCV library, the AVSR software enables computers to not only recognize speech, but also to detect a speaker's face and track their mouth movements, thus enabling much more accurate speech recognition. See figures two and three below for illustrations.

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