Invalidity dossier
US 8363724
Methods and apparatus using virtual reference pictures
Current assignee: InterDigital VC Holdings Inc
Added 9/21/2026, 9:43:02 AM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US8363724B2
Title: Methods and apparatus using virtual reference pictures
Patent number: US8363724B2 | Application: US12/309,066 | Publication: US20110243224A1 (2011-10-06); granted 2013-01-29
Assignee/current assignee (as listed): Original assignee Thomson Licensing SAS; current assignee InterDigital VC Holdings Inc. Inventors: Yeping Su, Peng Yin, Purvin Bibhas Pandit, Cristina Gomila.
Dates: Priority date 2006-07-11; filing date 2007-07-10; adjusted expiration 2029-07-07; legal status listed as active.
Purpose: The patent relates generally to video encoding and decoding, specifically to methods and apparatus using virtual reference pictures. The stated motivation is that prediction can be enhanced if processing is applied to decoded pictures — for example, weighted prediction in the MPEG-4 AVC standard addresses global illumination mismatch between the current picture and decoded pictures, and adaptive reference generation suppresses different types of noise to provide more related reference signals.
Plain-language scope (per the excerpted definitions/summary):
- An apparatus including an encoder for encoding at least one picture, using at least one virtual reference picture, to form a resultant bitstream.
- A corresponding method of encoding at least one picture using at least one virtual reference picture to form a resultant bitstream.
- An apparatus including a decoder for decoding at least one picture, using at least one virtual reference picture, from a bitstream.
- A corresponding method of decoding at least one picture using at least one virtual reference picture from a bitstream.
- In each case, the at least one virtual reference picture is different than a previously decoded picture.
Classifications noted: H04N19/00 and related subclasses (e.g., 19/51 motion estimation/motion compensation, 19/597 multi-view, 19/61 transform with predictive coding, 19/70 syntax, 19/80 interpolation filtering), plus H04N13/00.
Source: https://patents.google.com/patent/[US8363724](/patent/US8363724)/en
What the excerpt does not establish: It does not supply the full claims, the detailed description, the drawings (FIGS. 1–2 are referenced but truncated), specific embodiments, dependency/claim structure, or the full list of cited prior art. The excerpt is partial, so no complete claim scope or limiting details should be inferred beyond the summary statements above.
Generated 10/1/2026, 10:01:54 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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