G
PHYSICS
G10
MUSICAL INSTRUMENTS; ACOUSTICS
G10L
SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
21/00
Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
G10L21/02
Speech enhancement, e.g. noise reduction or echo cancellation