Multiplexing digital signals for transmission to remote locations
CA 2177811 A1 · Owner: Birch, Christopher H. · Inventors: Brooks, Walter R.; Lawrence, Steven S.; Vanstaden, Christian V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multiplex frame format for transmitting digital data in a data transmission system comprises a PACKETS portion comprising a highly error-protected region, a region having only Reed Solomon encoding as an error protection measure and a portion including, low speed data. The frame format also comprises portions for transmitting medium (AUDIO) and high speed (VIDEO) data streams following the PACKETS portion. Prior to transmission the composed frame comprising the PACKETS AUDIO and VIDEO portions is, interleaved and the BLOCK SYNC and FRAME SYNC are added (110). A multiplex structure control packet word of the PACKETS portion immediately follows FRAME SYNC. Thus the FRAME SYNC word defines …
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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 December 5, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2016.
- 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
Timeline From CIPO dates
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.