Method of and circuit arrangement for setting up a conference call
CA 1206237 A · Owner: International Standard Electric Corporation · Inventors: Zanzig, Jurgen; Eschmann, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
J.Eschmann J.Zanzig 1-5, Abstract of the Disclosure Method of and Circuit Arrangement for Setting up a Conference Call, A conference circuit in a digital telephone switching system includes a firs-t code converter (CCL) which con-, verts nonlinearly coded speech samples into linearly coded speech samples, and adder (ADD), which sums the converted speech samples originating from the participants in the conference, and a second code converter (LCC) which reconverts the sum values into nonlinearly coded speech samples.To avoid distortion without increasing the insertion loss, the speech samples of the individual participants are integrated with respect to time and compared in an evaluation …
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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 June 17, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 2003.
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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.