{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9679556","patent":{"patent_number":"US-9679556","title":"Method and system for selectively biased linear discriminant analysis in automatic speech recognition systems","assignee":null,"inventors":[],"filing_date":"2013-08-23T00:00:00.000Z","publication_date":"2017-06-13T00:00:00.000Z","cpc_codes":["G10L"],"num_claims":29,"abstract":"A system and method are presented for selectively biased linear discriminant analysis in automatic speech recognition systems. Linear Discriminant Analysis (LDA) may be used to improve the discrimination between the hidden Markov model (HMM) tied-states in the acoustic feature space. The between-class and within-class covariance matrices may be biased based on the observed recognition errors of the tied-states, such as shared HMM states of the context dependent tri-phone acoustic model. The recognition errors may be obtained from a trained maximum-likelihood acoustic model utilizing the tied-states which may then be used as classes in the analysis."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and system for selectively biased linear discriminant analysis in automatic speech recognition systems","description":"A system and method are presented for selectively biased linear discriminant analysis in automatic speech recognition systems. Linear Discriminant Analysis (LDA) may be used to improve the discriminat","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9679556","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9679556","citation_suggestion":"Patentable. \"Method and system for selectively biased linear discriminant analysis in automatic speech recognition systems\" (US-9679556). https://patentable.app/patents/US-9679556","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9679556","json":"https://patentable.app/api/llm-context/US-9679556","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:15:43.570Z"}