Invalidity dossier
US 11595643B2
Encoding method and decoding method, and device using same
Current assignee: Electronics and Telecommunications Research Institute ETRI
Added 10/10/2026, 12:01:09 AM
Active provider: DeepSeek · deepseek-v4-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US11595643B2
Title: Encoding method and decoding method, and device using same
Patent number: US11595643B2 (application US17/707,057; earlier publication US20220224892A1)
Inventors: Hui Yong KIM; Gwang Hoon Park; Kyung Yong Kim; Sung Chang LIM; Jin Ho Lee; Jin Soo Choi; Jin Woong Kim
Assignees: Electronics and Telecommunications Research Institute (ETRI) and Kyung Hee University (listed as both original and current assignee).
Key dates: Priority date 2012-04-16; filing date 2022-03-29; publication date 2023-02-28; legal status listed as Active, with anticipated expiration 2033-04-16.
Purpose and scope (plain language): The patent relates to video encoding and decoding methods and to devices using them. Based on the supplied classifications, the subject matter concerns predictive coding of digital video — specifically intra-frame/spatial prediction, selection among multiple spatial predictive coding modes, block-based coding units, transform coefficient handling, and chrominance (color) components. The listed "prior art keywords" — intra, current block, mode, signal, chroma signal — indicate the disclosure addresses intra prediction of a current block using an intra mode, with attention to chroma signals.
Note on completeness: The supplied text is an excerpt only, consisting largely of bibliographic data, classification codes, and images that did not render as readable text. It does not include the claims, the written description, or the abstract. Therefore this overview cannot establish the specific claimed invention, the exact technical steps of the encoding/decoding methods, the number or wording of claims, or any limitation language.
What the excerpt does not establish: It does not confirm litigation, ownership transfers, license status, validity, or prior art beyond the listed keywords and classifications. "Active" status and the expiration date are expressly described in the source as assumptions, not legal conclusions.
Source: https://patents.google.com/patent/[US11595643](/patent/US11595643)/en (fetched 2026-10-10).
Generated 10/10/2026, 12:01:24 AM
Cases on file (0)
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Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Proceedings on file (0)
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No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
Earlier patents, publications, and products that may anticipate or render the claims unpatentable.
Obviousness
Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.
Extensions
Patent term adjustments, term extensions, continuations, divisionals, family members, and expiration dates.
Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.