Summary
The Federal Circuit reviews a Patent Trial and Appeal Board decision in an inter partes review concerning DivX’s patent for streaming partly encrypted media content. The court holds that the claim language requires the encrypted portions of video frames, rather than the encryption information, to be located within the requested portions of the selected stream. The court reverses the Board’s claim construction, vacates its decision, and remands for further proceedings.
Topics
Practice areas
Questions Presented
- Whether limitation [l] of claim 1 requires the encryption information itself to be located within the requested portions of the selected stream of protected video, or instead requires only the encrypted portions of video frames identified by that information to be located there.
- Whether the Board's final written decision rejecting Netflix's obviousness challenge should be affirmed, vacated, or remanded after correction of the claim construction.
Holdings
- Limitation [l] requires that the encrypted portions of video frames, not the encryption information identifying those portions, be located within the requested portions of the selected stream of protected video.
- Under the corrected construction, limitation [l] is taught by the asserted prior-art combination; the Board's contrary construction and resulting decision rejecting Netflix's obviousness challenge cannot stand.
- The Board's claim construction is reviewed de novo when the analysis relies entirely on intrinsic evidence and general grammatical and language-interpretation principles rather than factfinding.
Key quotations
“We hold, too, that limitation [l], so construed, is taught by the asserted prior art. We vacate the Board’s decision and remand for further proceedings consistent with this opinion.” (14)
Factual background
DivX owns a patent claiming systems and methods for streaming partly encrypted media content using adaptive bitrate streaming. Claim 1 requires locating encryption information identifying encrypted portions of video frames within requested portions of a selected protected video stream. Netflix challenged the claims as obvious over specified prior-art references, and the appeal turned on whether the claim language required the encryption information itself, or only the encrypted video portions it identifies, to be located within the requested stream portions.
Procedural history
DivX sued Netflix for infringement of U.S. Patent No. 10,225,588. Netflix petitioned for inter partes review of claims 1–24, asserting obviousness over Chen in view of Lindahl and Hurst. The Board initially rejected Netflix's challenge based on lack of a reasonable expectation of success; the Federal Circuit vacated and remanded that decision in 2023. On remand, the Board majority adopted DivX's construction of limitation [l] and again rejected the obviousness challenge. The Federal Circuit reversed the Board's construction, vacated its decision, and remanded for further proceedings.
Remand instructions
Vacate the Board's decision and conduct further proceedings consistent with the Federal Circuit's construction of limitation [l]. Costs are awarded to Netflix.