Method and apparatus for uniquely encoding channels in a digital transmission system
CA 1066421 A · Owner: Western Electric Company, Incorporated · Inventors: Lentz, George H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, In a digital transmission system of the type which employs cross-polarized radio channels the failure of a, transmitter associated with a particular channel can cause an undesired signal cross-over into the receiver of the failed channel. According to the instant invention each channel in, the system is uniquely encoded by a combination of bitstream inversion and bitstream delay at the head end of the system. Thus if a signal cross-over occurs an excessive number of parity violations are detected in the failed channel and a switch to a protection channel is requested.
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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
- Granted November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 1996.
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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.