Invalidity dossier
US 6907142
Added 9/23/2026, 12:16:23 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 6907142 B2
Title: Method for encoding images, and an image coder
Patent number / application: US6907142B2; application US09/766,193, filed 2001-01-19.
Priority date: 2000-01-21. Granted / publication date: 2005-06-14.
Inventors: Ossi Kalevo, Joni Vahteri, Bogdan-Paul Dobrin, Marta Karczewicz.
Assignee: Original assignee Nokia Mobile Phones Ltd; current assignee listed as Nokia Technologies Oy. Legal status shown as Expired – Lifetime, expires 2022-11-07.
Purpose: The invention addresses inefficient intra-frame coding in prior art solutions, where transmission of intra-coded frames is bandwidth-excessive, limiting use of independently coded key frames in low bit rate digital image coding. It aims to further reduce redundant information and produce more efficient coding by introducing a spatial prediction scheme for pixel values offering prediction from several directions, allowing efficient prediction of edges with different orientations and savings in bit rate, plus context-dependent selection of prediction methods.
Plain-language scope: The image is divided into blocks. A spatial prediction is performed for a block to reduce transmitted information, with at least one prediction method defined. A classification is determined for at least one neighbouring block of the block to be predicted, based on that neighbouring block's contents. A prediction method is then selected for the current block on the basis of at least one such classification. Corresponding claims cover a device, an encoder, a decoder, a codec, a mobile terminal, and a storage medium for storing a software program, each with means for determining such a classification and selecting a prediction method accordingly. Classification is listed among the prior art keywords (block, prediction, predicted, neighbouring, classification). Classifications include H04N19/593 (predictive coding involving spatial prediction techniques).
Source: https://patents.google.com/patent/US6907142/en
What the excerpt does not establish: It does not provide the full claim text, detailed embodiments, dependent-claim limitations, or the complete technical description. It also does not establish the detailed figures or omitted portions of the specification.
Generated 10/1/2026, 9:53:42 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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