Invalidity dossier
US 5510841
Encoding apparatus in which flat subblocks are identified in blocks of a motion signal prior to coding the blocks and complementary decoding apparatus
Current assignee: Sony Corp
Added 9/23/2026, 1:27:02 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US5510841A
Title: Encoding apparatus in which flat subblocks are identified in blocks of a motion signal prior to coding the blocks and complementary decoding apparatus
Patent number: US5510841A | Application number: US08/286,562
Inventor: Ryuichi Iwamura
Assignee: Sony Corp (current and original assignee, per the listing)
Key dates:
- Prior art date / priority date: 1991-09-20
- Filing date: 1994-08-05
- Publication (grant) date: 1996-04-23
- Anticipated expiration: 2013-04-23
- Legal status as listed: Expired – Lifetime (the source notes legal status is an assumption, not a legal conclusion)
- Related: priority to US08/456,963 on 1995-06-01, which led to patent US6064435A
Purpose (plain-language, per title and classification): The invention concerns encoding digital video signals. Within blocks of a motion signal, subblocks that are "flat" are identified before the blocks are coded. The complementary decoding apparatus reverses this process. The title implies a motion-signal context, i.e., this relates to motion estimation/motion compensation in video coding rather than only intra-picture transforms.
Scope as indicated by classifications: The patent is classified under H04N19/00 (video coding/decoding), including predictive coding (H04N19/50), motion estimation/motion compensation (H04N19/51, /503, /513, /517), adaptive coding (H04N19/10), sampling/masking/truncation of coding units (H04N19/132), coding-unit complexity and edge/activity estimation (H04N19/14), and block/macroblock coding units (H04N19/176). These classes indicate a video encoder in which block-level activity or "flatness" drives adaptivity prior to coding.
Source: https://patents.google.com/patent/[US5510841](/patent/US5510841)/en
What the excerpt does not establish: The supplied text is largely bibliographic and classification data with schematic images omitted. It does not include the claims, detailed description, specific flatness criteria or thresholds, block/subblock sizes, coding syntax, or the precise structure of the encoder and decoder. No prior-art references are furnished in the excerpt. No litigation, ownership transfer, validity, or prior-art analysis is offered here, and none should be inferred beyond the listed bibliographic fields.
Generated 10/1/2026, 9:53:07 PM
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Assignment history
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Prior art
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