Data frame structure and synchronization system for digital television signal
CA 2194354 C · Owner: Zenith Electronics Corporation · Inventors: Willming, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A television signal is formatted for transmission by arranging a plurality of encoded data symbols, representing a plurality of source data bytes into , successive data frames each comprising 313 data segments. One of the data segments of each frame comprises a frame sync segment of which the last (12) symbols comprise a copy of the last (12) encoded data symbols the preceding data segment. The remaining segments of each frame comprise (12) interleaved subsegments A-L, each subsegment comprising a plurality of encoded data symbols representing a contiguous group of sources data bytes with the first , symbol of each of the first (4) subsegments A-D comprising a predetermined segment …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 29, 1995 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2017.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.