Welcome to GritTec Laboratory (GritTec Ltd.) specializing on research
and development of algorithms and technologies in the field of
speech and audio processing.
GritTec's research is focused on these key points:
- Technologies of Speech Enhancement and Speech Concealment;
- Technologies of Voice Biometric;
- Speech Recognition and Speech Synthesis;
- Technologies of adaptive filtration in frequency domain and time domain.
Automatic text independent speaker identification system
VOICE BIOMETRIC TECHNOLOGIES:
is intended for automatic identification of a speech signal of unknown
voice by comparing with "speaker cards", existing in the
database of system. ...
Automatic voice transcription system
is used for making phonetic transcription of a speech signal of unknown
voice and its language identification. ...
SPEECH ENHANCEMENT TECHNOLOGIES:
of speech enhancement can be used for reduction of external hindrances and
broadband color noises in speech signal. Controlled level of noises
suppression in speech is up to 60 dB.
Microphone Array solution
of speech enhancement can be used for reduction of external hindrances
and ambient noises in speech source signal. In its simplest form the
technique uses two array microphone configurations. By using
acoustical beam-forming techniques, the microphone array can
"focus" on the speaker's position. ...
More products about speech
Pitch Shift technology
is used for pitch scale modification (changing the harmonics structure)
of speech and audio signals. Pitch shift technology can be
effectively used for changing initial music or voice into another
music or voice (audio-speech effect). ...
Time stretching technology
is used for time scale modification (changing the speed or duration) of
an audio signal without affecting its pitch.
Principle of functioning algorithm is based on time-domain modification using SOLA technology, such as Waveform Synchronized Overlap-Add (WSOLA). ...
Sample Rate Converter
is technology used for changing sampling rate in speech and audio signals.
Principle of functioning algorithm is based on methods of interpolation.