{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9667958","patent":{"patent_number":"US-9667958","title":"Image coding and decoding methods and apparatuses","assignee":null,"inventors":[],"filing_date":"2014-05-02T00:00:00.000Z","publication_date":"2017-05-30T00:00:00.000Z","cpc_codes":["H04N","H04N","H04N","H04N","H04N","H04N"],"num_claims":12,"abstract":"An embodiment of the present invention provides an image coding method, where the coding method includes: performing predictive coding on an image; performing transform coding on the image on which the predictive coding has been performed; performing, by using a quantization matrix, quantization coding on the image on which the transform coding has been performed, where the quantization matrix is a matrix reflecting image quantization step information, the quantization matrix includes an M*N quantization matrix and an N*M quantization matrix, and the N*M quantization matrix is obtained by transposing the M*N quantization matrix; and performing entropy coding on the image on which the quantization coding has been performed, and coding the M*N quantization matrix, so as to generate a code stream. In the present invention, the number of bits required for coding a quantization matrix is effectively saved, thereby improving compression efficiency."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Image coding and decoding methods and apparatuses","description":"An embodiment of the present invention provides an image coding method, where the coding method includes: performing predictive coding on an image; performing transform coding on the image on which th","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9667958","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-9667958","citation_suggestion":"Patentable. \"Image coding and decoding methods and apparatuses\" (US-9667958). https://patentable.app/patents/US-9667958","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9667958","json":"https://patentable.app/api/llm-context/US-9667958","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:42:04.127Z"}