Invalidity dossier
US 10742996B2
Image encoder and decoder using unidirectional prediction
Current assignee: Electronics and Telecommunications Research Institute ETRI
Added 10/10/2026, 12:01:12 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 — US 10742996B2
Title: Image encoder and decoder using unidirectional prediction
Patent number / application: US 10742996 B2; application US 16/388,382 (published as US 20190281305 A1).
Assignees (as listed): Electronics and Telecommunications Research Institute (ETRI); Kyung Hee University; Research Institute for Industry Cooperation of Kwangwoon University. The listing states Google has not analyzed assignee accuracy.
Key dates: Priority date 2008-10-01; filing date 2019-04-18; publication date 2020-08-11; granted 2020-08-11. Anticipated expiration 2029-10-01. The source also notes a priority claim from KR1020090093128A (2009-09-30). Status listed as Active.
Inventors: Hae Chul Choi; Se Yoon Jeong; Sung-chang Lim; Jin Soo Choi; Jin Woo Hong; Dong Gyu Sim; Seoung-Jun Oh; Chang-Beom Ahn; Gwang Hoon Park; Seung Ryong Kook; Sea-Nae Park; Kwang-Su Jeong.
Purpose and plain-language scope (inferred from the supplied text): The patent concerns encoding and decoding of digital video/images using "unidirectional prediction." Consistent with its classifications, it relates to adaptive coding of video signals, selection of coding/prediction modes, and spatial prediction modes. The prior-art keywords supplied are block, sub, prediction mode, intra prediction, and decoding, indicating the disclosed subject matter operates on blocks or sub-blocks and involves intra (spatial) prediction mode handling. Representative classifications include H04N19/159 (prediction type: intra-frame, inter-frame, or bidirectional frame prediction), H04N19/11 (spatial predictive coding modes), H04N19/176 (block/macroblock), and H04N19/103 (selection of coding mode or prediction mode).
What the excerpt does not establish: The supplied text is largely bibliographic and classification data; it contains no claims, no detailed description, and no drawings or figures. It therefore does not establish the specific claimed method steps, the exact prediction scheme, dependent-claim limitations, embodiments, or the technical problem solved. The Korean priority document's content is not shown. Nothing here should be read as a legal conclusion on validity, scope, or enforceability.
Source: https://patents.google.com/patent/US10742996/en (fetched 2026-10-10).
Generated 10/10/2026, 12:01:41 AM
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Litigation summary
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PTAB challenges
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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
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Obviousness
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Extensions
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Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.