{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9838846","patent":{"patent_number":"US-9838846","title":"Extraction of walking direction from device orientation and reconstruction of device orientation during optimization of walking direction","assignee":null,"inventors":[],"filing_date":"2015-07-31T00:00:00.000Z","publication_date":"2017-12-05T00:00:00.000Z","cpc_codes":["H04W","G01C","G01C"],"num_claims":20,"abstract":"A method implemented by one or more processors may include determining a rotation between a client device frame and a world frame, determining a rotation between an average gravity aligned (AGA) frame of the client device and the client device frame, performing step detection of the client device, and determining a change in orientation from a first detected step to a second detected step. In one example, computing the change in orientation includes determining a rotation between a horizontally projected AGA (HPAGA) frame and the AGA frame, determining a rotation between the world frame and the HPAGA frame, and determining the change in orientation by using the rotation between the world frame and the HPAGA frame. The method may also include determining, using the computed change in orientation, pedestrian dead reckoning data of the client device over a time period, and determining an output location estimate of the client device using the pedestrian dead reckoning data."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Extraction of walking direction from device orientation and reconstruction of device orientation during optimization of walking direction","description":"A method implemented by one or more processors may include determining a rotation between a client device frame and a world frame, determining a rotation between an average gravity aligned (AGA) frame","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9838846","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-9838846","citation_suggestion":"Patentable. \"Extraction of walking direction from device orientation and reconstruction of device orientation during optimization of walking direction\" (US-9838846). https://patentable.app/patents/US-9838846","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9838846","json":"https://patentable.app/api/llm-context/US-9838846","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:01:44.465Z"}