Inventor · Bellevue, WA, US

Alejandro Acero

159Patents
25h-index
92Co-inventors
93Inventor score

Filing activity: Dec 31, 1992 → Nov 16, 2022

Most-cited inventions

PatentTitleAreaCited byStatus
US5913193A Method and system of runtime acoustic unit selection for speech synthesis Physics 343 Expired
US8385557B2 Multichannel acoustic echo reduction Electricity 265 Active
US5734791A Rapid tree-based method for vector quantization Physics 241 Expired
US6163769A Text-to-speech using clustered context-dependent phoneme-based units Physics 235 Expired
US6985858B2 Method and apparatus for removing noise from feature vectors Physics 169 Expired
US6959276B2 Including the category of environmental noise when processing speech signals Physics 150 Expired
US7107210B2 Method of noise reduction based on dynamic aspects of speech Physics 76 Expired
US7640272B2 Using automated content analysis for audio/video content consumption Emerging Cross-Sectional Technologies 71 Active
US8325909B2 Acoustic echo suppression Electricity 68 Active
US10789945B2 Low-latency intelligent automated assistant Physics 67 Active
US8005238B2 Robust adaptive beamforming with enhanced noise suppression Electricity 62 Active
US7080004B2 Grammar authoring system Physics 60 Expired
US5604839A Method and system for improving speech recognition through front-end normalization of feature vectors Physics 53 Expired
US7634407B2 Method and apparatus for indexing speech Physics 51 Active
US6226606A Method and apparatus for pitch tracking Physics 48 Expired
US5535305A Sub-partitioned vector quantization of probability density functions Physics 46 Expired
US8818002B2 Robust adaptive beamforming with enhanced noise suppression Electricity 41 Active
US7634406B2 System and method for identifying semantic intent from acoustic information Physics 39 Active
US7478038B2 Language model adaptation using semantic supervision Physics 37 Expired
US7548847B2 System for automatically annotating training data for a natural language understanding system Physics 35 Expired
US7028325B1 Annotating programs for automatic summary generation Physics 33 Expired
US6253182A Method and apparatus for speech synthesis with efficient spectral smoothing Physics 30 Expired
US7139703B2 Method of iterative noise estimation in a recursive framework Physics 30 Expired
US7266494B2 Method and apparatus for identifying noise environments from noisy signals Physics 28 Expired
US7379867B2 Discriminative training of language models for text and speech classification Physics 25 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.